/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-C-DAC/pthread-demo-datarace-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 11:19:49,912 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 11:19:49,915 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 11:19:49,960 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 11:19:49,962 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 11:19:49,966 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 11:19:49,970 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 11:19:49,978 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 11:19:49,983 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 11:19:49,990 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 11:19:49,991 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 11:19:49,993 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 11:19:49,993 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 11:19:49,997 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 11:19:49,999 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 11:19:50,002 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 11:19:50,003 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 11:19:50,007 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 11:19:50,016 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 11:19:50,026 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 11:19:50,028 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 11:19:50,030 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 11:19:50,031 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 11:19:50,034 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 11:19:50,043 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 11:19:50,077 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 11:19:50,080 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 11:19:50,083 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 11:19:50,083 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 11:19:50,088 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 11:19:50,089 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 11:19:50,090 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 11:19:50,096 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 11:19:50,097 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 11:19:50,098 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 11:19:50,098 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 11:19:50,115 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 11:19:50,116 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 11:19:50,116 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 11:19:50,121 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 11:19:50,122 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 11:19:50,124 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 11:19:50,193 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 11:19:50,194 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 11:19:50,198 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 11:19:50,199 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 11:19:50,199 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 11:19:50,200 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 11:19:50,200 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 11:19:50,200 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 11:19:50,201 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 11:19:50,202 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 11:19:50,203 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 11:19:50,204 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 11:19:50,204 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 11:19:50,204 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 11:19:50,205 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 11:19:50,205 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 11:19:50,205 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 11:19:50,206 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 11:19:50,206 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 11:19:50,206 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 11:19:50,207 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 11:19:50,207 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 11:19:50,208 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 11:19:50,208 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 11:19:50,208 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 11:19:50,209 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 11:19:50,651 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 11:19:50,680 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 11:19:50,683 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 11:19:50,684 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 11:19:50,685 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 11:19:50,690 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i [2020-12-22 11:19:50,776 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6cffd7e2f/8aa129f19238486499db0832cf97bce4/FLAGae8106529 [2020-12-22 11:19:51,664 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 11:19:51,665 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i [2020-12-22 11:19:51,688 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6cffd7e2f/8aa129f19238486499db0832cf97bce4/FLAGae8106529 [2020-12-22 11:19:51,827 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6cffd7e2f/8aa129f19238486499db0832cf97bce4 [2020-12-22 11:19:51,830 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 11:19:51,832 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 11:19:51,834 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 11:19:51,835 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 11:19:51,839 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 11:19:51,840 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:19:51" (1/1) ... [2020-12-22 11:19:51,841 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a3019c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:19:51, skipping insertion in model container [2020-12-22 11:19:51,841 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:19:51" (1/1) ... [2020-12-22 11:19:51,865 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 11:19:51,941 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 11:19:52,139 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i[820,833] [2020-12-22 11:19:52,615 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 11:19:52,631 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 11:19:52,664 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i[820,833] [2020-12-22 11:19:52,770 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 11:19:53,042 INFO L208 MainTranslator]: Completed translation [2020-12-22 11:19:53,043 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:19:53 WrapperNode [2020-12-22 11:19:53,044 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 11:19:53,046 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 11:19:53,046 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 11:19:53,047 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 11:19:53,056 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:19:53" (1/1) ... [2020-12-22 11:19:53,110 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:19:53" (1/1) ... [2020-12-22 11:19:53,149 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 11:19:53,150 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 11:19:53,151 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 11:19:53,151 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 11:19:53,161 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:19:53" (1/1) ... [2020-12-22 11:19:53,162 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:19:53" (1/1) ... [2020-12-22 11:19:53,166 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:19:53" (1/1) ... [2020-12-22 11:19:53,166 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:19:53" (1/1) ... [2020-12-22 11:19:53,175 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:19:53" (1/1) ... [2020-12-22 11:19:53,180 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:19:53" (1/1) ... [2020-12-22 11:19:53,183 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:19:53" (1/1) ... [2020-12-22 11:19:53,188 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 11:19:53,189 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 11:19:53,189 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 11:19:53,190 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 11:19:53,191 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:19:53" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 11:19:53,318 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 11:19:53,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 11:19:53,318 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 11:19:53,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 11:19:53,319 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2020-12-22 11:19:53,319 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_mutex [2020-12-22 11:19:53,319 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_mutex [2020-12-22 11:19:53,319 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 11:19:53,320 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 11:19:53,320 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 11:19:53,322 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-12-22 11:19:53,969 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 11:19:53,969 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-22 11:19:53,971 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:19:53 BoogieIcfgContainer [2020-12-22 11:19:53,972 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 11:19:53,973 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 11:19:53,974 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 11:19:53,977 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 11:19:53,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 11:19:51" (1/3) ... [2020-12-22 11:19:53,978 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cd892e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:19:53, skipping insertion in model container [2020-12-22 11:19:53,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:19:53" (2/3) ... [2020-12-22 11:19:53,979 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cd892e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:19:53, skipping insertion in model container [2020-12-22 11:19:53,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:19:53" (3/3) ... [2020-12-22 11:19:53,981 INFO L111 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-1.i [2020-12-22 11:19:53,988 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-12-22 11:19:53,988 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 11:19:53,994 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 11:19:53,995 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-12-22 11:19:54,022 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 11:19:54,022 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 11:19:54,022 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 11:19:54,022 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 11:19:54,023 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 11:19:54,023 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 11:19:54,023 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 11:19:54,023 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 11:19:54,024 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 11:19:54,024 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 11:19:54,024 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 11:19:54,024 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 11:19:54,024 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 11:19:54,025 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 11:19:54,025 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 11:19:54,025 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 11:19:54,025 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 11:19:54,025 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 11:19:54,026 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 11:19:54,026 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 11:19:54,026 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 11:19:54,026 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 11:19:54,026 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 11:19:54,027 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 11:19:54,027 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 11:19:54,027 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 11:19:54,027 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 11:19:54,028 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 11:19:54,028 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 11:19:54,028 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 11:19:54,028 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 11:19:54,029 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 11:19:54,029 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet35| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 11:19:54,029 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet35| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 11:19:54,029 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 11:19:54,029 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 11:19:54,030 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 11:19:54,030 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 11:19:54,030 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 11:19:54,030 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 11:19:54,030 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 11:19:54,031 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 11:19:54,031 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 11:19:54,031 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 11:19:54,031 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 11:19:54,031 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 11:19:54,034 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 11:19:54,034 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 11:19:54,034 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 11:19:54,034 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 11:19:54,035 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 11:19:54,035 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet35| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 11:19:54,035 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 11:19:54,035 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 11:19:54,035 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 11:19:54,042 INFO L149 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2020-12-22 11:19:54,062 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 11:19:54,087 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 11:19:54,088 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 11:19:54,088 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 11:19:54,088 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 11:19:54,088 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 11:19:54,088 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 11:19:54,088 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 11:19:54,089 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 11:19:54,103 INFO L120 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-12-22 11:19:54,105 INFO L135 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 83 places, 86 transitions, 180 flow [2020-12-22 11:19:54,109 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 83 places, 86 transitions, 180 flow [2020-12-22 11:19:54,111 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 83 places, 86 transitions, 180 flow [2020-12-22 11:19:54,170 INFO L129 PetriNetUnfolder]: 7/85 cut-off events. [2020-12-22 11:19:54,171 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-12-22 11:19:54,182 INFO L84 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 85 events. 7/85 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 82 event pairs, 0 based on Foata normal form. 0/77 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2020-12-22 11:19:54,192 INFO L116 LiptonReduction]: Number of co-enabled transitions 646 [2020-12-22 11:19:56,924 WARN L197 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-12-22 11:19:57,136 WARN L197 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-12-22 11:19:57,368 WARN L197 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-12-22 11:19:57,601 WARN L197 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-12-22 11:19:58,582 WARN L197 SmtUtils]: Spent 781.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 104 [2020-12-22 11:19:58,896 WARN L197 SmtUtils]: Spent 311.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-12-22 11:19:59,517 WARN L197 SmtUtils]: Spent 615.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 104 [2020-12-22 11:19:59,827 WARN L197 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-12-22 11:20:00,929 WARN L197 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 137 DAG size of output: 135 [2020-12-22 11:20:01,432 WARN L197 SmtUtils]: Spent 499.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-12-22 11:20:02,615 WARN L197 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 137 DAG size of output: 135 [2020-12-22 11:20:03,155 WARN L197 SmtUtils]: Spent 537.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-12-22 11:20:03,159 INFO L131 LiptonReduction]: Checked pairs total: 844 [2020-12-22 11:20:03,159 INFO L133 LiptonReduction]: Total number of compositions: 80 [2020-12-22 11:20:03,168 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 19 places, 17 transitions, 42 flow [2020-12-22 11:20:03,177 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 35 states. [2020-12-22 11:20:03,180 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-12-22 11:20:03,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 11:20:03,186 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 11:20:03,187 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 11:20:03,187 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 11:20:03,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 11:20:03,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1821882628, now seen corresponding path program 1 times [2020-12-22 11:20:03,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 11:20:03,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955654038] [2020-12-22 11:20:03,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 11:20:03,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 11:20:03,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 11:20:03,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955654038] [2020-12-22 11:20:03,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 11:20:03,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 11:20:03,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087812643] [2020-12-22 11:20:03,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 11:20:03,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 11:20:03,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 11:20:03,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 11:20:03,492 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-12-22 11:20:03,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 11:20:03,545 INFO L93 Difference]: Finished difference Result 54 states and 104 transitions. [2020-12-22 11:20:03,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 11:20:03,548 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-12-22 11:20:03,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 11:20:03,563 INFO L225 Difference]: With dead ends: 54 [2020-12-22 11:20:03,563 INFO L226 Difference]: Without dead ends: 54 [2020-12-22 11:20:03,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 11:20:03,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-22 11:20:03,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 39. [2020-12-22 11:20:03,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-22 11:20:03,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 74 transitions. [2020-12-22 11:20:03,619 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 74 transitions. Word has length 8 [2020-12-22 11:20:03,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 11:20:03,619 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 74 transitions. [2020-12-22 11:20:03,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 11:20:03,620 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 74 transitions. [2020-12-22 11:20:03,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 11:20:03,622 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 11:20:03,622 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 11:20:03,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 11:20:03,622 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 11:20:03,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 11:20:03,626 INFO L82 PathProgramCache]: Analyzing trace with hash 431550250, now seen corresponding path program 1 times [2020-12-22 11:20:03,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 11:20:03,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275011153] [2020-12-22 11:20:03,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 11:20:03,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 11:20:03,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 11:20:03,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275011153] [2020-12-22 11:20:03,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 11:20:03,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 11:20:03,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819168011] [2020-12-22 11:20:03,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 11:20:03,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 11:20:03,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 11:20:03,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 11:20:03,762 INFO L87 Difference]: Start difference. First operand 39 states and 74 transitions. Second operand 3 states. [2020-12-22 11:20:03,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 11:20:03,785 INFO L93 Difference]: Finished difference Result 60 states and 116 transitions. [2020-12-22 11:20:03,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 11:20:03,785 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-12-22 11:20:03,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 11:20:03,786 INFO L225 Difference]: With dead ends: 60 [2020-12-22 11:20:03,787 INFO L226 Difference]: Without dead ends: 60 [2020-12-22 11:20:03,789 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 11:20:03,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-22 11:20:03,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 46. [2020-12-22 11:20:03,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-22 11:20:03,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 88 transitions. [2020-12-22 11:20:03,797 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 88 transitions. Word has length 12 [2020-12-22 11:20:03,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 11:20:03,798 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 88 transitions. [2020-12-22 11:20:03,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 11:20:03,798 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 88 transitions. [2020-12-22 11:20:03,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 11:20:03,799 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 11:20:03,799 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 11:20:03,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 11:20:03,800 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 11:20:03,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 11:20:03,800 INFO L82 PathProgramCache]: Analyzing trace with hash -6787102, now seen corresponding path program 1 times [2020-12-22 11:20:03,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 11:20:03,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261136796] [2020-12-22 11:20:03,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 11:20:03,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 11:20:03,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 11:20:03,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261136796] [2020-12-22 11:20:03,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653310616] [2020-12-22 11:20:03,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 11:20:03,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 11:20:03,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 11:20:03,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 11:20:04,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 11:20:04,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 11:20:04,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 11:20:04,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856409286] [2020-12-22 11:20:04,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 11:20:04,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 11:20:04,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 11:20:04,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 11:20:04,069 INFO L87 Difference]: Start difference. First operand 46 states and 88 transitions. Second operand 5 states. [2020-12-22 11:20:04,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 11:20:04,115 INFO L93 Difference]: Finished difference Result 81 states and 158 transitions. [2020-12-22 11:20:04,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 11:20:04,116 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-12-22 11:20:04,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 11:20:04,117 INFO L225 Difference]: With dead ends: 81 [2020-12-22 11:20:04,117 INFO L226 Difference]: Without dead ends: 81 [2020-12-22 11:20:04,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 11:20:04,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-22 11:20:04,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 67. [2020-12-22 11:20:04,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-22 11:20:04,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 130 transitions. [2020-12-22 11:20:04,130 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 130 transitions. Word has length 15 [2020-12-22 11:20:04,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 11:20:04,130 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 130 transitions. [2020-12-22 11:20:04,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 11:20:04,131 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 130 transitions. [2020-12-22 11:20:04,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-22 11:20:04,132 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 11:20:04,132 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 11:20:04,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-22 11:20:04,347 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 11:20:04,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 11:20:04,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1814260694, now seen corresponding path program 2 times [2020-12-22 11:20:04,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 11:20:04,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321012287] [2020-12-22 11:20:04,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 11:20:04,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 11:20:04,482 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 11:20:04,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321012287] [2020-12-22 11:20:04,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139516870] [2020-12-22 11:20:04,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 11:20:04,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 11:20:04,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 11:20:04,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 11:20:04,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 11:20:04,686 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 11:20:04,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 11:20:04,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2020-12-22 11:20:04,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162104044] [2020-12-22 11:20:04,687 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 11:20:04,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 11:20:04,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 11:20:04,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 11:20:04,688 INFO L87 Difference]: Start difference. First operand 67 states and 130 transitions. Second operand 7 states. [2020-12-22 11:20:04,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 11:20:04,914 INFO L93 Difference]: Finished difference Result 200 states and 396 transitions. [2020-12-22 11:20:04,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 11:20:04,914 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-12-22 11:20:04,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 11:20:04,917 INFO L225 Difference]: With dead ends: 200 [2020-12-22 11:20:04,917 INFO L226 Difference]: Without dead ends: 200 [2020-12-22 11:20:04,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2020-12-22 11:20:04,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-12-22 11:20:04,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 136. [2020-12-22 11:20:04,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-12-22 11:20:04,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 268 transitions. [2020-12-22 11:20:04,937 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 268 transitions. Word has length 18 [2020-12-22 11:20:04,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 11:20:04,937 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 268 transitions. [2020-12-22 11:20:04,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 11:20:04,938 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 268 transitions. [2020-12-22 11:20:04,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-22 11:20:04,939 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 11:20:04,940 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 11:20:05,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 11:20:05,153 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 11:20:05,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 11:20:05,154 INFO L82 PathProgramCache]: Analyzing trace with hash 148664778, now seen corresponding path program 3 times [2020-12-22 11:20:05,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 11:20:05,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774874553] [2020-12-22 11:20:05,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 11:20:05,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 11:20:05,284 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 11:20:05,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774874553] [2020-12-22 11:20:05,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848974213] [2020-12-22 11:20:05,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 11:20:05,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 11:20:05,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 11:20:05,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 11:20:05,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 11:20:05,484 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 11:20:05,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 11:20:05,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2020-12-22 11:20:05,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288132390] [2020-12-22 11:20:05,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 11:20:05,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 11:20:05,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 11:20:05,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-22 11:20:05,488 INFO L87 Difference]: Start difference. First operand 136 states and 268 transitions. Second operand 9 states. [2020-12-22 11:20:05,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 11:20:05,774 INFO L93 Difference]: Finished difference Result 310 states and 616 transitions. [2020-12-22 11:20:05,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 11:20:05,775 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-12-22 11:20:05,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 11:20:05,778 INFO L225 Difference]: With dead ends: 310 [2020-12-22 11:20:05,778 INFO L226 Difference]: Without dead ends: 310 [2020-12-22 11:20:05,779 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=150, Invalid=270, Unknown=0, NotChecked=0, Total=420 [2020-12-22 11:20:05,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-12-22 11:20:05,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 229. [2020-12-22 11:20:05,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-12-22 11:20:05,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 454 transitions. [2020-12-22 11:20:05,803 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 454 transitions. Word has length 25 [2020-12-22 11:20:05,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 11:20:05,803 INFO L481 AbstractCegarLoop]: Abstraction has 229 states and 454 transitions. [2020-12-22 11:20:05,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 11:20:05,804 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 454 transitions. [2020-12-22 11:20:05,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-22 11:20:05,807 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 11:20:05,808 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 11:20:06,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 11:20:06,022 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 11:20:06,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 11:20:06,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1316981498, now seen corresponding path program 4 times [2020-12-22 11:20:06,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 11:20:06,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70782095] [2020-12-22 11:20:06,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 11:20:06,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 11:20:06,148 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 11:20:06,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70782095] [2020-12-22 11:20:06,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568834598] [2020-12-22 11:20:06,151 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 11:20:06,232 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 11:20:06,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 11:20:06,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 11:20:06,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 11:20:06,278 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 11:20:06,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 11:20:06,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-22 11:20:06,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824993872] [2020-12-22 11:20:06,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 11:20:06,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 11:20:06,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 11:20:06,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 11:20:06,281 INFO L87 Difference]: Start difference. First operand 229 states and 454 transitions. Second operand 8 states. [2020-12-22 11:20:06,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 11:20:06,350 INFO L93 Difference]: Finished difference Result 304 states and 604 transitions. [2020-12-22 11:20:06,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 11:20:06,351 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-12-22 11:20:06,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 11:20:06,353 INFO L225 Difference]: With dead ends: 304 [2020-12-22 11:20:06,353 INFO L226 Difference]: Without dead ends: 304 [2020-12-22 11:20:06,354 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 11:20:06,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-12-22 11:20:06,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 274. [2020-12-22 11:20:06,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-12-22 11:20:06,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 544 transitions. [2020-12-22 11:20:06,371 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 544 transitions. Word has length 32 [2020-12-22 11:20:06,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 11:20:06,371 INFO L481 AbstractCegarLoop]: Abstraction has 274 states and 544 transitions. [2020-12-22 11:20:06,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 11:20:06,372 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 544 transitions. [2020-12-22 11:20:06,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-22 11:20:06,375 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 11:20:06,375 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 11:20:06,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 11:20:06,590 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 11:20:06,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 11:20:06,591 INFO L82 PathProgramCache]: Analyzing trace with hash 395280306, now seen corresponding path program 5 times [2020-12-22 11:20:06,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 11:20:06,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721091617] [2020-12-22 11:20:06,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 11:20:06,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 11:20:06,754 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 11:20:06,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721091617] [2020-12-22 11:20:06,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146391308] [2020-12-22 11:20:06,756 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 11:20:06,853 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-22 11:20:06,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 11:20:06,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 11:20:06,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 11:20:06,933 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 11:20:06,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 11:20:06,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-22 11:20:06,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333919866] [2020-12-22 11:20:06,937 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 11:20:06,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 11:20:06,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 11:20:06,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-22 11:20:06,939 INFO L87 Difference]: Start difference. First operand 274 states and 544 transitions. Second operand 9 states. [2020-12-22 11:20:06,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 11:20:06,999 INFO L93 Difference]: Finished difference Result 349 states and 694 transitions. [2020-12-22 11:20:07,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 11:20:07,000 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2020-12-22 11:20:07,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 11:20:07,003 INFO L225 Difference]: With dead ends: 349 [2020-12-22 11:20:07,004 INFO L226 Difference]: Without dead ends: 349 [2020-12-22 11:20:07,004 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-22 11:20:07,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2020-12-22 11:20:07,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 319. [2020-12-22 11:20:07,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2020-12-22 11:20:07,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 634 transitions. [2020-12-22 11:20:07,024 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 634 transitions. Word has length 35 [2020-12-22 11:20:07,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 11:20:07,025 INFO L481 AbstractCegarLoop]: Abstraction has 319 states and 634 transitions. [2020-12-22 11:20:07,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 11:20:07,025 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 634 transitions. [2020-12-22 11:20:07,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 11:20:07,034 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 11:20:07,034 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 11:20:07,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-22 11:20:07,249 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 11:20:07,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 11:20:07,250 INFO L82 PathProgramCache]: Analyzing trace with hash -279007238, now seen corresponding path program 6 times [2020-12-22 11:20:07,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 11:20:07,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023030489] [2020-12-22 11:20:07,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 11:20:07,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 11:20:07,382 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 11:20:07,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023030489] [2020-12-22 11:20:07,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107535786] [2020-12-22 11:20:07,383 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 11:20:07,551 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-22 11:20:07,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 11:20:07,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-22 11:20:07,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 11:20:07,629 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 11:20:07,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 11:20:07,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-22 11:20:07,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70476800] [2020-12-22 11:20:07,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 11:20:07,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 11:20:07,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 11:20:07,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-22 11:20:07,632 INFO L87 Difference]: Start difference. First operand 319 states and 634 transitions. Second operand 10 states. [2020-12-22 11:20:07,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 11:20:07,734 INFO L93 Difference]: Finished difference Result 394 states and 784 transitions. [2020-12-22 11:20:07,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 11:20:07,735 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2020-12-22 11:20:07,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 11:20:07,739 INFO L225 Difference]: With dead ends: 394 [2020-12-22 11:20:07,739 INFO L226 Difference]: Without dead ends: 394 [2020-12-22 11:20:07,739 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-22 11:20:07,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2020-12-22 11:20:07,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 364. [2020-12-22 11:20:07,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2020-12-22 11:20:07,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 724 transitions. [2020-12-22 11:20:07,752 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 724 transitions. Word has length 38 [2020-12-22 11:20:07,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 11:20:07,755 INFO L481 AbstractCegarLoop]: Abstraction has 364 states and 724 transitions. [2020-12-22 11:20:07,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 11:20:07,755 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 724 transitions. [2020-12-22 11:20:07,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 11:20:07,756 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 11:20:07,756 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 11:20:07,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 11:20:07,972 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 11:20:07,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 11:20:07,973 INFO L82 PathProgramCache]: Analyzing trace with hash -417187150, now seen corresponding path program 7 times [2020-12-22 11:20:07,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 11:20:07,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055455443] [2020-12-22 11:20:07,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 11:20:08,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 11:20:08,101 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 11:20:08,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055455443] [2020-12-22 11:20:08,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671189981] [2020-12-22 11:20:08,102 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 11:20:08,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 11:20:08,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 11:20:08,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 11:20:08,278 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 11:20:08,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 11:20:08,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-22 11:20:08,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630981387] [2020-12-22 11:20:08,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 11:20:08,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 11:20:08,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 11:20:08,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-22 11:20:08,281 INFO L87 Difference]: Start difference. First operand 364 states and 724 transitions. Second operand 11 states. [2020-12-22 11:20:08,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 11:20:08,395 INFO L93 Difference]: Finished difference Result 439 states and 874 transitions. [2020-12-22 11:20:08,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 11:20:08,396 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-12-22 11:20:08,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 11:20:08,399 INFO L225 Difference]: With dead ends: 439 [2020-12-22 11:20:08,399 INFO L226 Difference]: Without dead ends: 439 [2020-12-22 11:20:08,399 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-22 11:20:08,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2020-12-22 11:20:08,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 409. [2020-12-22 11:20:08,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 409 states. [2020-12-22 11:20:08,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 814 transitions. [2020-12-22 11:20:08,415 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 814 transitions. Word has length 41 [2020-12-22 11:20:08,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 11:20:08,415 INFO L481 AbstractCegarLoop]: Abstraction has 409 states and 814 transitions. [2020-12-22 11:20:08,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 11:20:08,416 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 814 transitions. [2020-12-22 11:20:08,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-22 11:20:08,417 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 11:20:08,417 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 11:20:08,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 11:20:08,621 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 11:20:08,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 11:20:08,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1938691322, now seen corresponding path program 8 times [2020-12-22 11:20:08,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 11:20:08,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185017372] [2020-12-22 11:20:08,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 11:20:08,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 11:20:08,742 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 11:20:08,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185017372] [2020-12-22 11:20:08,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962728699] [2020-12-22 11:20:08,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 11:20:08,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 11:20:08,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 11:20:08,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 11:20:08,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 11:20:08,894 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 11:20:08,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 11:20:08,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-22 11:20:08,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607205646] [2020-12-22 11:20:08,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 11:20:08,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 11:20:08,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 11:20:08,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-22 11:20:08,897 INFO L87 Difference]: Start difference. First operand 409 states and 814 transitions. Second operand 12 states. [2020-12-22 11:20:08,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 11:20:08,986 INFO L93 Difference]: Finished difference Result 484 states and 964 transitions. [2020-12-22 11:20:08,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 11:20:08,987 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 44 [2020-12-22 11:20:08,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 11:20:08,990 INFO L225 Difference]: With dead ends: 484 [2020-12-22 11:20:08,990 INFO L226 Difference]: Without dead ends: 484 [2020-12-22 11:20:08,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-22 11:20:08,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2020-12-22 11:20:09,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 454. [2020-12-22 11:20:09,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 454 states. [2020-12-22 11:20:09,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 904 transitions. [2020-12-22 11:20:09,004 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 904 transitions. Word has length 44 [2020-12-22 11:20:09,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 11:20:09,005 INFO L481 AbstractCegarLoop]: Abstraction has 454 states and 904 transitions. [2020-12-22 11:20:09,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 11:20:09,005 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 904 transitions. [2020-12-22 11:20:09,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-22 11:20:09,006 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 11:20:09,006 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 11:20:09,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-22 11:20:09,220 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 11:20:09,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 11:20:09,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1853666738, now seen corresponding path program 9 times [2020-12-22 11:20:09,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 11:20:09,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818444007] [2020-12-22 11:20:09,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 11:20:09,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 11:20:09,359 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 11:20:09,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818444007] [2020-12-22 11:20:09,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177353493] [2020-12-22 11:20:09,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 11:20:09,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-22 11:20:09,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 11:20:09,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 11:20:09,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 11:20:09,575 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-12-22 11:20:09,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 11:20:09,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 16 [2020-12-22 11:20:09,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459545097] [2020-12-22 11:20:09,577 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 11:20:09,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 11:20:09,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 11:20:09,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-12-22 11:20:09,578 INFO L87 Difference]: Start difference. First operand 454 states and 904 transitions. Second operand 16 states. [2020-12-22 11:20:10,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 11:20:10,545 INFO L93 Difference]: Finished difference Result 774 states and 1544 transitions. [2020-12-22 11:20:10,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-12-22 11:20:10,546 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 47 [2020-12-22 11:20:10,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 11:20:10,551 INFO L225 Difference]: With dead ends: 774 [2020-12-22 11:20:10,552 INFO L226 Difference]: Without dead ends: 774 [2020-12-22 11:20:10,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=990, Invalid=2090, Unknown=0, NotChecked=0, Total=3080 [2020-12-22 11:20:10,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2020-12-22 11:20:10,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 631. [2020-12-22 11:20:10,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 631 states. [2020-12-22 11:20:10,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 1258 transitions. [2020-12-22 11:20:10,574 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 1258 transitions. Word has length 47 [2020-12-22 11:20:10,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 11:20:10,575 INFO L481 AbstractCegarLoop]: Abstraction has 631 states and 1258 transitions. [2020-12-22 11:20:10,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 11:20:10,575 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 1258 transitions. [2020-12-22 11:20:10,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 11:20:10,577 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 11:20:10,577 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 11:20:10,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 11:20:10,793 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 11:20:10,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 11:20:10,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1772735262, now seen corresponding path program 10 times [2020-12-22 11:20:10,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 11:20:10,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133703372] [2020-12-22 11:20:10,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 11:20:10,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 11:20:10,964 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-22 11:20:10,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133703372] [2020-12-22 11:20:10,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476364424] [2020-12-22 11:20:10,965 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 11:20:11,080 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 11:20:11,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 11:20:11,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 11:20:11,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 11:20:11,158 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-22 11:20:11,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 11:20:11,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-22 11:20:11,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185875475] [2020-12-22 11:20:11,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 11:20:11,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 11:20:11,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 11:20:11,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-22 11:20:11,160 INFO L87 Difference]: Start difference. First operand 631 states and 1258 transitions. Second operand 14 states. [2020-12-22 11:20:11,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 11:20:11,306 INFO L93 Difference]: Finished difference Result 726 states and 1448 transitions. [2020-12-22 11:20:11,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 11:20:11,307 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-12-22 11:20:11,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 11:20:11,311 INFO L225 Difference]: With dead ends: 726 [2020-12-22 11:20:11,312 INFO L226 Difference]: Without dead ends: 726 [2020-12-22 11:20:11,312 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-22 11:20:11,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 726 states. [2020-12-22 11:20:11,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 726 to 688. [2020-12-22 11:20:11,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 688 states. [2020-12-22 11:20:11,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 1372 transitions. [2020-12-22 11:20:11,332 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 1372 transitions. Word has length 54 [2020-12-22 11:20:11,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 11:20:11,333 INFO L481 AbstractCegarLoop]: Abstraction has 688 states and 1372 transitions. [2020-12-22 11:20:11,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 11:20:11,333 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 1372 transitions. [2020-12-22 11:20:11,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-22 11:20:11,335 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 11:20:11,335 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 11:20:11,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 11:20:11,549 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 11:20:11,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 11:20:11,550 INFO L82 PathProgramCache]: Analyzing trace with hash 870141850, now seen corresponding path program 11 times [2020-12-22 11:20:11,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 11:20:11,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882522957] [2020-12-22 11:20:11,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 11:20:11,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 11:20:11,698 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-22 11:20:11,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882522957] [2020-12-22 11:20:11,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67286957] [2020-12-22 11:20:11,699 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 11:20:11,824 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-22 11:20:11,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 11:20:11,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 11:20:11,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 11:20:11,900 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-22 11:20:11,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 11:20:11,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-22 11:20:11,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695414429] [2020-12-22 11:20:11,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 11:20:11,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 11:20:11,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 11:20:11,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-22 11:20:11,902 INFO L87 Difference]: Start difference. First operand 688 states and 1372 transitions. Second operand 15 states. [2020-12-22 11:20:12,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 11:20:12,056 INFO L93 Difference]: Finished difference Result 783 states and 1562 transitions. [2020-12-22 11:20:12,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 11:20:12,057 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2020-12-22 11:20:12,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 11:20:12,062 INFO L225 Difference]: With dead ends: 783 [2020-12-22 11:20:12,062 INFO L226 Difference]: Without dead ends: 783 [2020-12-22 11:20:12,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-22 11:20:12,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2020-12-22 11:20:12,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 745. [2020-12-22 11:20:12,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 745 states. [2020-12-22 11:20:12,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1486 transitions. [2020-12-22 11:20:12,087 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1486 transitions. Word has length 57 [2020-12-22 11:20:12,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 11:20:12,087 INFO L481 AbstractCegarLoop]: Abstraction has 745 states and 1486 transitions. [2020-12-22 11:20:12,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 11:20:12,088 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1486 transitions. [2020-12-22 11:20:12,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 11:20:12,090 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 11:20:12,090 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 11:20:12,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 11:20:12,304 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 11:20:12,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 11:20:12,305 INFO L82 PathProgramCache]: Analyzing trace with hash -518284830, now seen corresponding path program 12 times [2020-12-22 11:20:12,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 11:20:12,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732424981] [2020-12-22 11:20:12,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 11:20:12,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 11:20:12,500 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-22 11:20:12,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732424981] [2020-12-22 11:20:12,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088819169] [2020-12-22 11:20:12,502 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 11:20:12,684 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-22 11:20:12,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 11:20:12,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 11:20:12,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 11:20:12,817 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-12-22 11:20:12,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 11:20:12,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7] total 20 [2020-12-22 11:20:12,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063519133] [2020-12-22 11:20:12,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 11:20:12,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 11:20:12,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 11:20:12,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-12-22 11:20:12,820 INFO L87 Difference]: Start difference. First operand 745 states and 1486 transitions. Second operand 20 states. [2020-12-22 11:20:14,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 11:20:14,666 INFO L93 Difference]: Finished difference Result 1148 states and 2292 transitions. [2020-12-22 11:20:14,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-12-22 11:20:14,667 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 60 [2020-12-22 11:20:14,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 11:20:14,674 INFO L225 Difference]: With dead ends: 1148 [2020-12-22 11:20:14,675 INFO L226 Difference]: Without dead ends: 1148 [2020-12-22 11:20:14,679 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2140 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2205, Invalid=4935, Unknown=0, NotChecked=0, Total=7140 [2020-12-22 11:20:14,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1148 states. [2020-12-22 11:20:14,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1148 to 970. [2020-12-22 11:20:14,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 970 states. [2020-12-22 11:20:14,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 970 states to 970 states and 1936 transitions. [2020-12-22 11:20:14,713 INFO L78 Accepts]: Start accepts. Automaton has 970 states and 1936 transitions. Word has length 60 [2020-12-22 11:20:14,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 11:20:14,713 INFO L481 AbstractCegarLoop]: Abstraction has 970 states and 1936 transitions. [2020-12-22 11:20:14,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 11:20:14,714 INFO L276 IsEmpty]: Start isEmpty. Operand 970 states and 1936 transitions. [2020-12-22 11:20:14,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 11:20:14,717 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 11:20:14,717 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 11:20:14,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 11:20:14,930 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 11:20:14,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 11:20:14,931 INFO L82 PathProgramCache]: Analyzing trace with hash 362870146, now seen corresponding path program 13 times [2020-12-22 11:20:14,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 11:20:14,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017056852] [2020-12-22 11:20:14,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 11:20:14,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 11:20:15,112 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-22 11:20:15,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017056852] [2020-12-22 11:20:15,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535092941] [2020-12-22 11:20:15,113 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 11:20:15,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 11:20:15,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 11:20:15,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 11:20:15,286 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-22 11:20:15,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 11:20:15,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-22 11:20:15,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959231084] [2020-12-22 11:20:15,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 11:20:15,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 11:20:15,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 11:20:15,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-22 11:20:15,289 INFO L87 Difference]: Start difference. First operand 970 states and 1936 transitions. Second operand 17 states. [2020-12-22 11:20:15,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 11:20:15,446 INFO L93 Difference]: Finished difference Result 1085 states and 2166 transitions. [2020-12-22 11:20:15,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 11:20:15,447 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 67 [2020-12-22 11:20:15,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 11:20:15,453 INFO L225 Difference]: With dead ends: 1085 [2020-12-22 11:20:15,454 INFO L226 Difference]: Without dead ends: 1085 [2020-12-22 11:20:15,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-22 11:20:15,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1085 states. [2020-12-22 11:20:15,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1085 to 1039. [2020-12-22 11:20:15,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1039 states. [2020-12-22 11:20:15,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1039 states to 1039 states and 2074 transitions. [2020-12-22 11:20:15,481 INFO L78 Accepts]: Start accepts. Automaton has 1039 states and 2074 transitions. Word has length 67 [2020-12-22 11:20:15,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 11:20:15,481 INFO L481 AbstractCegarLoop]: Abstraction has 1039 states and 2074 transitions. [2020-12-22 11:20:15,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 11:20:15,482 INFO L276 IsEmpty]: Start isEmpty. Operand 1039 states and 2074 transitions. [2020-12-22 11:20:15,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 11:20:15,484 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 11:20:15,485 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 11:20:15,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-22 11:20:15,701 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 11:20:15,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 11:20:15,702 INFO L82 PathProgramCache]: Analyzing trace with hash -916650550, now seen corresponding path program 14 times [2020-12-22 11:20:15,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 11:20:15,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253233356] [2020-12-22 11:20:15,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 11:20:15,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 11:20:15,894 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-22 11:20:15,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253233356] [2020-12-22 11:20:15,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636609432] [2020-12-22 11:20:15,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 11:20:16,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 11:20:16,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 11:20:16,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 11:20:16,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 11:20:16,112 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-22 11:20:16,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 11:20:16,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-22 11:20:16,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023414930] [2020-12-22 11:20:16,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 11:20:16,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 11:20:16,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 11:20:16,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-22 11:20:16,117 INFO L87 Difference]: Start difference. First operand 1039 states and 2074 transitions. Second operand 18 states. [2020-12-22 11:20:16,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 11:20:16,208 INFO L93 Difference]: Finished difference Result 1154 states and 2304 transitions. [2020-12-22 11:20:16,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 11:20:16,208 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 70 [2020-12-22 11:20:16,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 11:20:16,215 INFO L225 Difference]: With dead ends: 1154 [2020-12-22 11:20:16,216 INFO L226 Difference]: Without dead ends: 1154 [2020-12-22 11:20:16,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-22 11:20:16,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1154 states. [2020-12-22 11:20:16,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1154 to 1108. [2020-12-22 11:20:16,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1108 states. [2020-12-22 11:20:16,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1108 states to 1108 states and 2212 transitions. [2020-12-22 11:20:16,246 INFO L78 Accepts]: Start accepts. Automaton has 1108 states and 2212 transitions. Word has length 70 [2020-12-22 11:20:16,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 11:20:16,246 INFO L481 AbstractCegarLoop]: Abstraction has 1108 states and 2212 transitions. [2020-12-22 11:20:16,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 11:20:16,246 INFO L276 IsEmpty]: Start isEmpty. Operand 1108 states and 2212 transitions. [2020-12-22 11:20:16,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-22 11:20:16,255 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 11:20:16,256 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 11:20:16,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 11:20:16,470 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 11:20:16,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 11:20:16,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1282953086, now seen corresponding path program 15 times [2020-12-22 11:20:16,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 11:20:16,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088446489] [2020-12-22 11:20:16,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 11:20:16,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 11:20:16,676 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-22 11:20:16,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088446489] [2020-12-22 11:20:16,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322808426] [2020-12-22 11:20:16,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 11:20:16,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-22 11:20:16,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 11:20:16,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 11:20:16,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 11:20:16,971 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-12-22 11:20:16,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 11:20:16,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8] total 24 [2020-12-22 11:20:16,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345114424] [2020-12-22 11:20:16,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 11:20:16,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 11:20:16,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 11:20:16,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-12-22 11:20:16,973 INFO L87 Difference]: Start difference. First operand 1108 states and 2212 transitions. Second operand 24 states. [2020-12-22 11:20:20,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 11:20:20,315 INFO L93 Difference]: Finished difference Result 1594 states and 3184 transitions. [2020-12-22 11:20:20,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2020-12-22 11:20:20,316 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 73 [2020-12-22 11:20:20,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 11:20:20,324 INFO L225 Difference]: With dead ends: 1594 [2020-12-22 11:20:20,325 INFO L226 Difference]: Without dead ends: 1594 [2020-12-22 11:20:20,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4650 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4284, Invalid=9996, Unknown=0, NotChecked=0, Total=14280 [2020-12-22 11:20:20,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1594 states. [2020-12-22 11:20:20,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1594 to 1381. [2020-12-22 11:20:20,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1381 states. [2020-12-22 11:20:20,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1381 states to 1381 states and 2758 transitions. [2020-12-22 11:20:20,365 INFO L78 Accepts]: Start accepts. Automaton has 1381 states and 2758 transitions. Word has length 73 [2020-12-22 11:20:20,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 11:20:20,365 INFO L481 AbstractCegarLoop]: Abstraction has 1381 states and 2758 transitions. [2020-12-22 11:20:20,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 11:20:20,365 INFO L276 IsEmpty]: Start isEmpty. Operand 1381 states and 2758 transitions. [2020-12-22 11:20:20,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 11:20:20,369 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 11:20:20,369 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 11:20:20,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 11:20:20,584 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 11:20:20,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 11:20:20,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1781793358, now seen corresponding path program 16 times [2020-12-22 11:20:20,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 11:20:20,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745551245] [2020-12-22 11:20:20,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 11:20:20,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 11:20:20,866 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-12-22 11:20:20,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745551245] [2020-12-22 11:20:20,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703814926] [2020-12-22 11:20:20,867 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 11:20:21,279 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 11:20:21,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 11:20:21,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 11:20:21,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 11:20:21,373 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-12-22 11:20:21,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 11:20:21,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-22 11:20:21,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230839197] [2020-12-22 11:20:21,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 11:20:21,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 11:20:21,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 11:20:21,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-22 11:20:21,376 INFO L87 Difference]: Start difference. First operand 1381 states and 2758 transitions. Second operand 20 states. [2020-12-22 11:20:21,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 11:20:21,576 INFO L93 Difference]: Finished difference Result 1516 states and 3028 transitions. [2020-12-22 11:20:21,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 11:20:21,579 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 80 [2020-12-22 11:20:21,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 11:20:21,587 INFO L225 Difference]: With dead ends: 1516 [2020-12-22 11:20:21,587 INFO L226 Difference]: Without dead ends: 1516 [2020-12-22 11:20:21,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-22 11:20:21,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1516 states. [2020-12-22 11:20:21,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1516 to 1462. [2020-12-22 11:20:21,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1462 states. [2020-12-22 11:20:21,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1462 states to 1462 states and 2920 transitions. [2020-12-22 11:20:21,622 INFO L78 Accepts]: Start accepts. Automaton has 1462 states and 2920 transitions. Word has length 80 [2020-12-22 11:20:21,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 11:20:21,622 INFO L481 AbstractCegarLoop]: Abstraction has 1462 states and 2920 transitions. [2020-12-22 11:20:21,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 11:20:21,622 INFO L276 IsEmpty]: Start isEmpty. Operand 1462 states and 2920 transitions. [2020-12-22 11:20:21,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 11:20:21,626 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 11:20:21,626 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 11:20:21,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 11:20:21,842 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 11:20:21,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 11:20:21,842 INFO L82 PathProgramCache]: Analyzing trace with hash 915055210, now seen corresponding path program 17 times [2020-12-22 11:20:21,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 11:20:21,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205454438] [2020-12-22 11:20:21,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 11:20:21,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 11:20:22,086 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-12-22 11:20:22,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205454438] [2020-12-22 11:20:22,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706376478] [2020-12-22 11:20:22,087 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 11:20:22,274 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-12-22 11:20:22,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 11:20:22,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 11:20:22,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 11:20:22,365 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-12-22 11:20:22,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 11:20:22,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-22 11:20:22,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106815972] [2020-12-22 11:20:22,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 11:20:22,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 11:20:22,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 11:20:22,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-22 11:20:22,368 INFO L87 Difference]: Start difference. First operand 1462 states and 2920 transitions. Second operand 21 states. [2020-12-22 11:20:22,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 11:20:22,548 INFO L93 Difference]: Finished difference Result 1597 states and 3190 transitions. [2020-12-22 11:20:22,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 11:20:22,549 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 83 [2020-12-22 11:20:22,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 11:20:22,554 INFO L225 Difference]: With dead ends: 1597 [2020-12-22 11:20:22,554 INFO L226 Difference]: Without dead ends: 1597 [2020-12-22 11:20:22,555 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-22 11:20:22,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1597 states. [2020-12-22 11:20:22,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1597 to 1543. [2020-12-22 11:20:22,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1543 states. [2020-12-22 11:20:22,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1543 states to 1543 states and 3082 transitions. [2020-12-22 11:20:22,589 INFO L78 Accepts]: Start accepts. Automaton has 1543 states and 3082 transitions. Word has length 83 [2020-12-22 11:20:22,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 11:20:22,589 INFO L481 AbstractCegarLoop]: Abstraction has 1543 states and 3082 transitions. [2020-12-22 11:20:22,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 11:20:22,590 INFO L276 IsEmpty]: Start isEmpty. Operand 1543 states and 3082 transitions. [2020-12-22 11:20:22,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-22 11:20:22,594 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 11:20:22,594 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 11:20:22,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 11:20:22,809 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 11:20:22,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 11:20:22,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1072505522, now seen corresponding path program 18 times [2020-12-22 11:20:22,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 11:20:22,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732560445] [2020-12-22 11:20:22,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 11:20:22,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 11:20:23,083 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-12-22 11:20:23,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732560445] [2020-12-22 11:20:23,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170616167] [2020-12-22 11:20:23,084 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 11:20:23,365 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-22 11:20:23,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 11:20:23,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-22 11:20:23,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 11:20:23,552 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2020-12-22 11:20:23,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 11:20:23,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9] total 28 [2020-12-22 11:20:23,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252185362] [2020-12-22 11:20:23,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-22 11:20:23,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 11:20:23,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-22 11:20:23,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2020-12-22 11:20:23,556 INFO L87 Difference]: Start difference. First operand 1543 states and 3082 transitions. Second operand 28 states. [2020-12-22 11:20:29,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 11:20:29,223 INFO L93 Difference]: Finished difference Result 2112 states and 4220 transitions. [2020-12-22 11:20:29,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2020-12-22 11:20:29,224 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 86 [2020-12-22 11:20:29,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 11:20:29,231 INFO L225 Difference]: With dead ends: 2112 [2020-12-22 11:20:29,232 INFO L226 Difference]: Without dead ends: 2112 [2020-12-22 11:20:29,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8904 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=7560, Invalid=18200, Unknown=0, NotChecked=0, Total=25760 [2020-12-22 11:20:29,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2112 states. [2020-12-22 11:20:29,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2112 to 1864. [2020-12-22 11:20:29,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1864 states. [2020-12-22 11:20:29,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1864 states to 1864 states and 3724 transitions. [2020-12-22 11:20:29,285 INFO L78 Accepts]: Start accepts. Automaton has 1864 states and 3724 transitions. Word has length 86 [2020-12-22 11:20:29,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 11:20:29,285 INFO L481 AbstractCegarLoop]: Abstraction has 1864 states and 3724 transitions. [2020-12-22 11:20:29,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-22 11:20:29,285 INFO L276 IsEmpty]: Start isEmpty. Operand 1864 states and 3724 transitions. [2020-12-22 11:20:29,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 11:20:29,290 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 11:20:29,291 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 11:20:29,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 11:20:29,506 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 11:20:29,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 11:20:29,507 INFO L82 PathProgramCache]: Analyzing trace with hash 515154002, now seen corresponding path program 19 times [2020-12-22 11:20:29,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 11:20:29,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39515984] [2020-12-22 11:20:29,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 11:20:29,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 11:20:29,923 INFO L134 CoverageAnalysis]: Checked inductivity of 623 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-12-22 11:20:29,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39515984] [2020-12-22 11:20:29,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049970195] [2020-12-22 11:20:29,924 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 11:20:30,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 11:20:30,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 11:20:30,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 11:20:30,194 INFO L134 CoverageAnalysis]: Checked inductivity of 623 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-12-22 11:20:30,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 11:20:30,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-22 11:20:30,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679609542] [2020-12-22 11:20:30,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 11:20:30,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 11:20:30,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 11:20:30,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-22 11:20:30,201 INFO L87 Difference]: Start difference. First operand 1864 states and 3724 transitions. Second operand 23 states. [2020-12-22 11:20:30,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 11:20:30,471 INFO L93 Difference]: Finished difference Result 1957 states and 3910 transitions. [2020-12-22 11:20:30,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 11:20:30,472 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 93 [2020-12-22 11:20:30,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 11:20:30,482 INFO L225 Difference]: With dead ends: 1957 [2020-12-22 11:20:30,482 INFO L226 Difference]: Without dead ends: 1957 [2020-12-22 11:20:30,483 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-22 11:20:30,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1957 states. [2020-12-22 11:20:30,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1957 to 1957. [2020-12-22 11:20:30,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1957 states. [2020-12-22 11:20:30,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1957 states to 1957 states and 3910 transitions. [2020-12-22 11:20:30,533 INFO L78 Accepts]: Start accepts. Automaton has 1957 states and 3910 transitions. Word has length 93 [2020-12-22 11:20:30,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 11:20:30,534 INFO L481 AbstractCegarLoop]: Abstraction has 1957 states and 3910 transitions. [2020-12-22 11:20:30,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 11:20:30,535 INFO L276 IsEmpty]: Start isEmpty. Operand 1957 states and 3910 transitions. [2020-12-22 11:20:30,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 11:20:30,541 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 11:20:30,541 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 11:20:30,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 11:20:30,755 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 11:20:30,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 11:20:30,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1891015014, now seen corresponding path program 20 times [2020-12-22 11:20:30,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 11:20:30,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408466257] [2020-12-22 11:20:30,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 11:20:30,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 11:20:30,930 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-12-22 11:20:30,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408466257] [2020-12-22 11:20:30,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558331837] [2020-12-22 11:20:30,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 11:20:31,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 11:20:31,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 11:20:31,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 11:20:31,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 11:20:31,186 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-12-22 11:20:31,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 11:20:31,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-22 11:20:31,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521597934] [2020-12-22 11:20:31,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 11:20:31,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 11:20:31,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 11:20:31,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-22 11:20:31,191 INFO L87 Difference]: Start difference. First operand 1957 states and 3910 transitions. Second operand 11 states. [2020-12-22 11:20:31,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 11:20:31,243 INFO L93 Difference]: Finished difference Result 2398 states and 4792 transitions. [2020-12-22 11:20:31,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 11:20:31,244 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 96 [2020-12-22 11:20:31,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 11:20:31,255 INFO L225 Difference]: With dead ends: 2398 [2020-12-22 11:20:31,255 INFO L226 Difference]: Without dead ends: 2398 [2020-12-22 11:20:31,255 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-22 11:20:31,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2398 states. [2020-12-22 11:20:31,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2398 to 2209. [2020-12-22 11:20:31,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2209 states. [2020-12-22 11:20:31,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2209 states to 2209 states and 4414 transitions. [2020-12-22 11:20:31,310 INFO L78 Accepts]: Start accepts. Automaton has 2209 states and 4414 transitions. Word has length 96 [2020-12-22 11:20:31,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 11:20:31,311 INFO L481 AbstractCegarLoop]: Abstraction has 2209 states and 4414 transitions. [2020-12-22 11:20:31,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 11:20:31,311 INFO L276 IsEmpty]: Start isEmpty. Operand 2209 states and 4414 transitions. [2020-12-22 11:20:31,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-22 11:20:31,317 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 11:20:31,318 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 11:20:31,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 11:20:31,529 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 11:20:31,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 11:20:31,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1255838082, now seen corresponding path program 21 times [2020-12-22 11:20:31,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 11:20:31,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314080565] [2020-12-22 11:20:31,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 11:20:31,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 11:20:31,712 INFO L134 CoverageAnalysis]: Checked inductivity of 710 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-12-22 11:20:31,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314080565] [2020-12-22 11:20:31,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793204601] [2020-12-22 11:20:31,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 11:20:31,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-12-22 11:20:31,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 11:20:31,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 11:20:31,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 11:20:32,081 INFO L134 CoverageAnalysis]: Checked inductivity of 710 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-12-22 11:20:32,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 11:20:32,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-22 11:20:32,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727539019] [2020-12-22 11:20:32,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 11:20:32,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 11:20:32,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 11:20:32,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-22 11:20:32,083 INFO L87 Difference]: Start difference. First operand 2209 states and 4414 transitions. Second operand 12 states. [2020-12-22 11:20:32,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 11:20:32,135 INFO L93 Difference]: Finished difference Result 2650 states and 5296 transitions. [2020-12-22 11:20:32,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 11:20:32,136 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 100 [2020-12-22 11:20:32,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 11:20:32,149 INFO L225 Difference]: With dead ends: 2650 [2020-12-22 11:20:32,150 INFO L226 Difference]: Without dead ends: 2650 [2020-12-22 11:20:32,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-22 11:20:32,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2650 states. [2020-12-22 11:20:32,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2650 to 2461. [2020-12-22 11:20:32,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2461 states. [2020-12-22 11:20:32,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2461 states to 2461 states and 4918 transitions. [2020-12-22 11:20:32,209 INFO L78 Accepts]: Start accepts. Automaton has 2461 states and 4918 transitions. Word has length 100 [2020-12-22 11:20:32,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 11:20:32,209 INFO L481 AbstractCegarLoop]: Abstraction has 2461 states and 4918 transitions. [2020-12-22 11:20:32,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 11:20:32,209 INFO L276 IsEmpty]: Start isEmpty. Operand 2461 states and 4918 transitions. [2020-12-22 11:20:32,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-12-22 11:20:32,217 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 11:20:32,217 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 11:20:32,430 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-22 11:20:32,430 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 11:20:32,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 11:20:32,431 INFO L82 PathProgramCache]: Analyzing trace with hash 848037994, now seen corresponding path program 22 times [2020-12-22 11:20:32,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 11:20:32,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287487195] [2020-12-22 11:20:32,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 11:20:32,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 11:20:32,600 INFO L134 CoverageAnalysis]: Checked inductivity of 743 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-12-22 11:20:32,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287487195] [2020-12-22 11:20:32,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097224100] [2020-12-22 11:20:32,601 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 11:20:33,439 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 11:20:33,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 11:20:33,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 11:20:33,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 11:20:33,548 INFO L134 CoverageAnalysis]: Checked inductivity of 743 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-12-22 11:20:33,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 11:20:33,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-22 11:20:33,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988135337] [2020-12-22 11:20:33,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 11:20:33,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 11:20:33,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 11:20:33,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-22 11:20:33,551 INFO L87 Difference]: Start difference. First operand 2461 states and 4918 transitions. Second operand 13 states. [2020-12-22 11:20:33,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 11:20:33,608 INFO L93 Difference]: Finished difference Result 2902 states and 5800 transitions. [2020-12-22 11:20:33,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 11:20:33,608 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 104 [2020-12-22 11:20:33,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 11:20:33,630 INFO L225 Difference]: With dead ends: 2902 [2020-12-22 11:20:33,630 INFO L226 Difference]: Without dead ends: 2902 [2020-12-22 11:20:33,630 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-22 11:20:33,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2902 states. [2020-12-22 11:20:33,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2902 to 2713. [2020-12-22 11:20:33,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2713 states. [2020-12-22 11:20:33,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2713 states to 2713 states and 5422 transitions. [2020-12-22 11:20:33,691 INFO L78 Accepts]: Start accepts. Automaton has 2713 states and 5422 transitions. Word has length 104 [2020-12-22 11:20:33,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 11:20:33,691 INFO L481 AbstractCegarLoop]: Abstraction has 2713 states and 5422 transitions. [2020-12-22 11:20:33,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 11:20:33,691 INFO L276 IsEmpty]: Start isEmpty. Operand 2713 states and 5422 transitions. [2020-12-22 11:20:33,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 11:20:33,699 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 11:20:33,699 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 11:20:33,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 11:20:33,914 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 11:20:33,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 11:20:33,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1700252498, now seen corresponding path program 23 times [2020-12-22 11:20:33,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 11:20:33,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445557167] [2020-12-22 11:20:33,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 11:20:33,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 11:20:34,150 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-12-22 11:20:34,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445557167] [2020-12-22 11:20:34,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573206431] [2020-12-22 11:20:34,151 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 11:20:34,363 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2020-12-22 11:20:34,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 11:20:34,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 11:20:34,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 11:20:34,494 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-12-22 11:20:34,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 11:20:34,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-22 11:20:34,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988418646] [2020-12-22 11:20:34,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 11:20:34,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 11:20:34,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 11:20:34,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-22 11:20:34,497 INFO L87 Difference]: Start difference. First operand 2713 states and 5422 transitions. Second operand 14 states. [2020-12-22 11:20:34,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 11:20:34,552 INFO L93 Difference]: Finished difference Result 3154 states and 6304 transitions. [2020-12-22 11:20:34,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 11:20:34,552 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 108 [2020-12-22 11:20:34,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 11:20:34,561 INFO L225 Difference]: With dead ends: 3154 [2020-12-22 11:20:34,561 INFO L226 Difference]: Without dead ends: 3154 [2020-12-22 11:20:34,562 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-22 11:20:34,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3154 states. [2020-12-22 11:20:34,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3154 to 2965. [2020-12-22 11:20:34,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2965 states. [2020-12-22 11:20:34,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2965 states to 2965 states and 5926 transitions. [2020-12-22 11:20:34,624 INFO L78 Accepts]: Start accepts. Automaton has 2965 states and 5926 transitions. Word has length 108 [2020-12-22 11:20:34,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 11:20:34,624 INFO L481 AbstractCegarLoop]: Abstraction has 2965 states and 5926 transitions. [2020-12-22 11:20:34,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 11:20:34,624 INFO L276 IsEmpty]: Start isEmpty. Operand 2965 states and 5926 transitions. [2020-12-22 11:20:34,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 11:20:34,632 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 11:20:34,632 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 11:20:34,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-22 11:20:34,848 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 11:20:34,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 11:20:34,848 INFO L82 PathProgramCache]: Analyzing trace with hash -180889030, now seen corresponding path program 24 times [2020-12-22 11:20:34,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 11:20:34,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855739796] [2020-12-22 11:20:34,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 11:20:34,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 11:20:35,032 INFO L134 CoverageAnalysis]: Checked inductivity of 821 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-12-22 11:20:35,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855739796] [2020-12-22 11:20:35,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777033559] [2020-12-22 11:20:35,032 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 11:20:35,481 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2020-12-22 11:20:35,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 11:20:35,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 11:20:35,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 11:20:35,626 INFO L134 CoverageAnalysis]: Checked inductivity of 821 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-12-22 11:20:35,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 11:20:35,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-22 11:20:35,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171341030] [2020-12-22 11:20:35,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 11:20:35,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 11:20:35,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 11:20:35,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-22 11:20:35,628 INFO L87 Difference]: Start difference. First operand 2965 states and 5926 transitions. Second operand 15 states. [2020-12-22 11:20:35,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 11:20:35,690 INFO L93 Difference]: Finished difference Result 3406 states and 6808 transitions. [2020-12-22 11:20:35,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 11:20:35,690 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 112 [2020-12-22 11:20:35,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 11:20:35,697 INFO L225 Difference]: With dead ends: 3406 [2020-12-22 11:20:35,697 INFO L226 Difference]: Without dead ends: 3406 [2020-12-22 11:20:35,697 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-22 11:20:35,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3406 states. [2020-12-22 11:20:35,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3406 to 3217. [2020-12-22 11:20:35,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3217 states. [2020-12-22 11:20:35,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3217 states to 3217 states and 6430 transitions. [2020-12-22 11:20:35,781 INFO L78 Accepts]: Start accepts. Automaton has 3217 states and 6430 transitions. Word has length 112 [2020-12-22 11:20:35,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 11:20:35,782 INFO L481 AbstractCegarLoop]: Abstraction has 3217 states and 6430 transitions. [2020-12-22 11:20:35,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 11:20:35,782 INFO L276 IsEmpty]: Start isEmpty. Operand 3217 states and 6430 transitions. [2020-12-22 11:20:35,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-12-22 11:20:35,795 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 11:20:35,795 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 11:20:36,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 11:20:36,009 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 11:20:36,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 11:20:36,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1730557218, now seen corresponding path program 25 times [2020-12-22 11:20:36,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 11:20:36,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884757333] [2020-12-22 11:20:36,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 11:20:36,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 11:20:36,253 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-12-22 11:20:36,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884757333] [2020-12-22 11:20:36,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202841613] [2020-12-22 11:20:36,254 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 11:20:36,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 11:20:36,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 11:20:36,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 11:20:36,502 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-12-22 11:20:36,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 11:20:36,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-22 11:20:36,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652015820] [2020-12-22 11:20:36,503 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 11:20:36,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 11:20:36,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 11:20:36,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-22 11:20:36,505 INFO L87 Difference]: Start difference. First operand 3217 states and 6430 transitions. Second operand 16 states. [2020-12-22 11:20:36,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 11:20:36,582 INFO L93 Difference]: Finished difference Result 3658 states and 7312 transitions. [2020-12-22 11:20:36,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 11:20:36,583 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 116 [2020-12-22 11:20:36,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 11:20:36,591 INFO L225 Difference]: With dead ends: 3658 [2020-12-22 11:20:36,591 INFO L226 Difference]: Without dead ends: 3658 [2020-12-22 11:20:36,594 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-22 11:20:36,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3658 states. [2020-12-22 11:20:36,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3658 to 3469. [2020-12-22 11:20:36,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3469 states. [2020-12-22 11:20:36,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3469 states to 3469 states and 6934 transitions. [2020-12-22 11:20:36,664 INFO L78 Accepts]: Start accepts. Automaton has 3469 states and 6934 transitions. Word has length 116 [2020-12-22 11:20:36,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 11:20:36,664 INFO L481 AbstractCegarLoop]: Abstraction has 3469 states and 6934 transitions. [2020-12-22 11:20:36,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 11:20:36,664 INFO L276 IsEmpty]: Start isEmpty. Operand 3469 states and 6934 transitions. [2020-12-22 11:20:36,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-12-22 11:20:36,679 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 11:20:36,679 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 11:20:36,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-22 11:20:36,895 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 11:20:36,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 11:20:36,896 INFO L82 PathProgramCache]: Analyzing trace with hash 857529354, now seen corresponding path program 26 times [2020-12-22 11:20:36,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 11:20:36,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387856890] [2020-12-22 11:20:36,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 11:20:36,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 11:20:37,152 INFO L134 CoverageAnalysis]: Checked inductivity of 915 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-12-22 11:20:37,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387856890] [2020-12-22 11:20:37,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314254252] [2020-12-22 11:20:37,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 11:20:37,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 11:20:37,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 11:20:37,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 11:20:37,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 11:20:37,444 INFO L134 CoverageAnalysis]: Checked inductivity of 915 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-12-22 11:20:37,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 11:20:37,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-22 11:20:37,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156062991] [2020-12-22 11:20:37,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 11:20:37,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 11:20:37,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 11:20:37,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-22 11:20:37,447 INFO L87 Difference]: Start difference. First operand 3469 states and 6934 transitions. Second operand 17 states. [2020-12-22 11:20:37,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 11:20:37,516 INFO L93 Difference]: Finished difference Result 3910 states and 7816 transitions. [2020-12-22 11:20:37,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 11:20:37,517 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 120 [2020-12-22 11:20:37,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 11:20:37,525 INFO L225 Difference]: With dead ends: 3910 [2020-12-22 11:20:37,525 INFO L226 Difference]: Without dead ends: 3910 [2020-12-22 11:20:37,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-22 11:20:37,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3910 states. [2020-12-22 11:20:37,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3910 to 3721. [2020-12-22 11:20:37,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3721 states. [2020-12-22 11:20:37,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3721 states to 3721 states and 7438 transitions. [2020-12-22 11:20:37,594 INFO L78 Accepts]: Start accepts. Automaton has 3721 states and 7438 transitions. Word has length 120 [2020-12-22 11:20:37,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 11:20:37,595 INFO L481 AbstractCegarLoop]: Abstraction has 3721 states and 7438 transitions. [2020-12-22 11:20:37,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 11:20:37,595 INFO L276 IsEmpty]: Start isEmpty. Operand 3721 states and 7438 transitions. [2020-12-22 11:20:37,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-12-22 11:20:37,604 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 11:20:37,604 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 11:20:37,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 11:20:37,818 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 11:20:37,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 11:20:37,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1142279922, now seen corresponding path program 27 times [2020-12-22 11:20:37,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 11:20:37,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013210193] [2020-12-22 11:20:37,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 11:20:37,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 11:20:38,062 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-12-22 11:20:38,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013210193] [2020-12-22 11:20:38,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537501005] [2020-12-22 11:20:38,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 11:20:38,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2020-12-22 11:20:38,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 11:20:38,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 11:20:38,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 11:20:38,564 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-12-22 11:20:38,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 11:20:38,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-22 11:20:38,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82466038] [2020-12-22 11:20:38,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 11:20:38,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 11:20:38,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 11:20:38,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-22 11:20:38,566 INFO L87 Difference]: Start difference. First operand 3721 states and 7438 transitions. Second operand 18 states. [2020-12-22 11:20:38,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 11:20:38,636 INFO L93 Difference]: Finished difference Result 4162 states and 8320 transitions. [2020-12-22 11:20:38,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 11:20:38,636 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 124 [2020-12-22 11:20:38,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 11:20:38,651 INFO L225 Difference]: With dead ends: 4162 [2020-12-22 11:20:38,651 INFO L226 Difference]: Without dead ends: 4162 [2020-12-22 11:20:38,654 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-22 11:20:38,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4162 states. [2020-12-22 11:20:38,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4162 to 3973. [2020-12-22 11:20:38,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3973 states. [2020-12-22 11:20:38,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3973 states to 3973 states and 7942 transitions. [2020-12-22 11:20:38,729 INFO L78 Accepts]: Start accepts. Automaton has 3973 states and 7942 transitions. Word has length 124 [2020-12-22 11:20:38,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 11:20:38,729 INFO L481 AbstractCegarLoop]: Abstraction has 3973 states and 7942 transitions. [2020-12-22 11:20:38,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 11:20:38,729 INFO L276 IsEmpty]: Start isEmpty. Operand 3973 states and 7942 transitions. [2020-12-22 11:20:38,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-12-22 11:20:38,738 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 11:20:38,738 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 11:20:38,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 11:20:38,953 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 11:20:38,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 11:20:38,953 INFO L82 PathProgramCache]: Analyzing trace with hash 2013990362, now seen corresponding path program 28 times [2020-12-22 11:20:38,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 11:20:38,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118425989] [2020-12-22 11:20:38,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 11:20:39,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 11:20:39,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1025 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-12-22 11:20:39,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118425989] [2020-12-22 11:20:39,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071591687] [2020-12-22 11:20:39,298 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 11:20:40,702 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 11:20:40,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 11:20:40,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 11:20:40,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 11:20:40,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1025 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-12-22 11:20:40,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 11:20:40,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-22 11:20:40,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537768902] [2020-12-22 11:20:40,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 11:20:40,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 11:20:40,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 11:20:40,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-22 11:20:40,842 INFO L87 Difference]: Start difference. First operand 3973 states and 7942 transitions. Second operand 19 states. [2020-12-22 11:20:40,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 11:20:40,932 INFO L93 Difference]: Finished difference Result 4414 states and 8824 transitions. [2020-12-22 11:20:40,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 11:20:40,933 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 128 [2020-12-22 11:20:40,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 11:20:40,943 INFO L225 Difference]: With dead ends: 4414 [2020-12-22 11:20:40,943 INFO L226 Difference]: Without dead ends: 4414 [2020-12-22 11:20:40,944 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-22 11:20:40,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4414 states. [2020-12-22 11:20:41,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4414 to 4225. [2020-12-22 11:20:41,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4225 states. [2020-12-22 11:20:41,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4225 states to 4225 states and 8446 transitions. [2020-12-22 11:20:41,025 INFO L78 Accepts]: Start accepts. Automaton has 4225 states and 8446 transitions. Word has length 128 [2020-12-22 11:20:41,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 11:20:41,025 INFO L481 AbstractCegarLoop]: Abstraction has 4225 states and 8446 transitions. [2020-12-22 11:20:41,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 11:20:41,025 INFO L276 IsEmpty]: Start isEmpty. Operand 4225 states and 8446 transitions. [2020-12-22 11:20:41,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-12-22 11:20:41,036 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 11:20:41,036 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 11:20:41,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 11:20:41,252 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 11:20:41,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 11:20:41,253 INFO L82 PathProgramCache]: Analyzing trace with hash 536254658, now seen corresponding path program 29 times [2020-12-22 11:20:41,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 11:20:41,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14058099] [2020-12-22 11:20:41,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 11:20:41,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 11:20:41,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1086 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-12-22 11:20:41,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14058099] [2020-12-22 11:20:41,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361531208] [2020-12-22 11:20:41,535 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 11:20:41,846 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2020-12-22 11:20:41,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 11:20:41,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 11:20:41,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 11:20:41,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1086 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-12-22 11:20:41,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 11:20:41,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-22 11:20:41,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512456258] [2020-12-22 11:20:41,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 11:20:41,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 11:20:41,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 11:20:41,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-22 11:20:41,994 INFO L87 Difference]: Start difference. First operand 4225 states and 8446 transitions. Second operand 20 states. [2020-12-22 11:20:42,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 11:20:42,104 INFO L93 Difference]: Finished difference Result 4666 states and 9328 transitions. [2020-12-22 11:20:42,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 11:20:42,105 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 132 [2020-12-22 11:20:42,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 11:20:42,116 INFO L225 Difference]: With dead ends: 4666 [2020-12-22 11:20:42,116 INFO L226 Difference]: Without dead ends: 4666 [2020-12-22 11:20:42,116 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-22 11:20:42,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4666 states. [2020-12-22 11:20:42,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4666 to 4477. [2020-12-22 11:20:42,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4477 states. [2020-12-22 11:20:42,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4477 states to 4477 states and 8950 transitions. [2020-12-22 11:20:42,199 INFO L78 Accepts]: Start accepts. Automaton has 4477 states and 8950 transitions. Word has length 132 [2020-12-22 11:20:42,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 11:20:42,200 INFO L481 AbstractCegarLoop]: Abstraction has 4477 states and 8950 transitions. [2020-12-22 11:20:42,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 11:20:42,200 INFO L276 IsEmpty]: Start isEmpty. Operand 4477 states and 8950 transitions. [2020-12-22 11:20:42,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-22 11:20:42,211 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 11:20:42,211 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 11:20:42,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-22 11:20:42,425 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 11:20:42,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 11:20:42,426 INFO L82 PathProgramCache]: Analyzing trace with hash 2144497578, now seen corresponding path program 30 times [2020-12-22 11:20:42,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 11:20:42,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179919409] [2020-12-22 11:20:42,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 11:20:42,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 11:20:42,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1151 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-12-22 11:20:42,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179919409] [2020-12-22 11:20:42,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885322014] [2020-12-22 11:20:42,768 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 11:20:43,366 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2020-12-22 11:20:43,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 11:20:43,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 11:20:43,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 11:20:43,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1151 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-12-22 11:20:43,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 11:20:43,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-22 11:20:43,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280752268] [2020-12-22 11:20:43,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 11:20:43,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 11:20:43,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 11:20:43,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-22 11:20:43,503 INFO L87 Difference]: Start difference. First operand 4477 states and 8950 transitions. Second operand 21 states. [2020-12-22 11:20:43,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 11:20:43,588 INFO L93 Difference]: Finished difference Result 4918 states and 9832 transitions. [2020-12-22 11:20:43,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 11:20:43,589 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 136 [2020-12-22 11:20:43,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 11:20:43,596 INFO L225 Difference]: With dead ends: 4918 [2020-12-22 11:20:43,597 INFO L226 Difference]: Without dead ends: 4918 [2020-12-22 11:20:43,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-22 11:20:43,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4918 states. [2020-12-22 11:20:43,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4918 to 4729. [2020-12-22 11:20:43,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4729 states. [2020-12-22 11:20:43,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4729 states to 4729 states and 9454 transitions. [2020-12-22 11:20:43,684 INFO L78 Accepts]: Start accepts. Automaton has 4729 states and 9454 transitions. Word has length 136 [2020-12-22 11:20:43,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 11:20:43,684 INFO L481 AbstractCegarLoop]: Abstraction has 4729 states and 9454 transitions. [2020-12-22 11:20:43,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 11:20:43,684 INFO L276 IsEmpty]: Start isEmpty. Operand 4729 states and 9454 transitions. [2020-12-22 11:20:43,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-12-22 11:20:43,695 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 11:20:43,695 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 11:20:43,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 11:20:43,909 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 11:20:43,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 11:20:43,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1318621842, now seen corresponding path program 31 times [2020-12-22 11:20:43,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 11:20:43,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422483737] [2020-12-22 11:20:43,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 11:20:43,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 11:20:44,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-12-22 11:20:44,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422483737] [2020-12-22 11:20:44,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348229023] [2020-12-22 11:20:44,295 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 11:20:44,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 11:20:44,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 11:20:44,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 11:20:44,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-12-22 11:20:44,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 11:20:44,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-22 11:20:44,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859164249] [2020-12-22 11:20:44,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 11:20:44,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 11:20:44,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 11:20:44,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-22 11:20:44,606 INFO L87 Difference]: Start difference. First operand 4729 states and 9454 transitions. Second operand 22 states. [2020-12-22 11:20:44,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 11:20:44,712 INFO L93 Difference]: Finished difference Result 5170 states and 10336 transitions. [2020-12-22 11:20:44,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 11:20:44,713 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 140 [2020-12-22 11:20:44,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 11:20:44,721 INFO L225 Difference]: With dead ends: 5170 [2020-12-22 11:20:44,721 INFO L226 Difference]: Without dead ends: 5170 [2020-12-22 11:20:44,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-22 11:20:44,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5170 states. [2020-12-22 11:20:44,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5170 to 4981. [2020-12-22 11:20:44,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4981 states. [2020-12-22 11:20:44,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4981 states to 4981 states and 9958 transitions. [2020-12-22 11:20:44,826 INFO L78 Accepts]: Start accepts. Automaton has 4981 states and 9958 transitions. Word has length 140 [2020-12-22 11:20:44,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 11:20:44,826 INFO L481 AbstractCegarLoop]: Abstraction has 4981 states and 9958 transitions. [2020-12-22 11:20:44,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 11:20:44,826 INFO L276 IsEmpty]: Start isEmpty. Operand 4981 states and 9958 transitions. [2020-12-22 11:20:44,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-12-22 11:20:44,840 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 11:20:44,840 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 11:20:45,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-22 11:20:45,057 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 11:20:45,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 11:20:45,058 INFO L82 PathProgramCache]: Analyzing trace with hash 910360954, now seen corresponding path program 32 times [2020-12-22 11:20:45,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 11:20:45,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576433749] [2020-12-22 11:20:45,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 11:20:45,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 11:20:45,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1293 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-12-22 11:20:45,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576433749] [2020-12-22 11:20:45,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000250482] [2020-12-22 11:20:45,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 11:20:45,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 11:20:45,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 11:20:45,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 11:20:45,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 11:20:45,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1293 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-12-22 11:20:45,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 11:20:45,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-22 11:20:45,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131948655] [2020-12-22 11:20:45,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 11:20:45,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 11:20:45,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 11:20:45,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-22 11:20:45,787 INFO L87 Difference]: Start difference. First operand 4981 states and 9958 transitions. Second operand 23 states. [2020-12-22 11:20:45,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 11:20:45,899 INFO L93 Difference]: Finished difference Result 5233 states and 10462 transitions. [2020-12-22 11:20:45,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 11:20:45,899 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 144 [2020-12-22 11:20:45,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 11:20:45,907 INFO L225 Difference]: With dead ends: 5233 [2020-12-22 11:20:45,907 INFO L226 Difference]: Without dead ends: 5233 [2020-12-22 11:20:45,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-22 11:20:45,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5233 states. [2020-12-22 11:20:46,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5233 to 5233. [2020-12-22 11:20:46,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5233 states. [2020-12-22 11:20:46,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5233 states to 5233 states and 10462 transitions. [2020-12-22 11:20:46,021 INFO L78 Accepts]: Start accepts. Automaton has 5233 states and 10462 transitions. Word has length 144 [2020-12-22 11:20:46,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 11:20:46,022 INFO L481 AbstractCegarLoop]: Abstraction has 5233 states and 10462 transitions. [2020-12-22 11:20:46,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 11:20:46,022 INFO L276 IsEmpty]: Start isEmpty. Operand 5233 states and 10462 transitions. [2020-12-22 11:20:46,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-22 11:20:46,032 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 11:20:46,032 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 11:20:46,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-22 11:20:46,247 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 11:20:46,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 11:20:46,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1405860962, now seen corresponding path program 33 times [2020-12-22 11:20:46,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 11:20:46,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16256759] [2020-12-22 11:20:46,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 11:20:46,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 11:20:49,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 11:20:49,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16256759] [2020-12-22 11:20:49,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395411600] [2020-12-22 11:20:49,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 11:20:50,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2020-12-22 11:20:50,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 11:20:50,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 130 conjunts are in the unsatisfiable core [2020-12-22 11:20:50,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 11:20:50,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 11:20:50,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 11:20:50,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-12-22 11:20:50,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609029853] [2020-12-22 11:20:50,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-12-22 11:20:50,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 11:20:50,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-12-22 11:20:50,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-12-22 11:20:50,496 INFO L87 Difference]: Start difference. First operand 5233 states and 10462 transitions. Second operand 63 states. [2020-12-22 11:21:34,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 11:21:34,971 INFO L93 Difference]: Finished difference Result 34492 states and 68977 transitions. [2020-12-22 11:21:34,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 293 states. [2020-12-22 11:21:34,972 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 148 [2020-12-22 11:21:34,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 11:21:35,027 INFO L225 Difference]: With dead ends: 34492 [2020-12-22 11:21:35,028 INFO L226 Difference]: Without dead ends: 34490 [2020-12-22 11:21:35,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 145 SyntacticMatches, 2 SemanticMatches, 291 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26335 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=1043, Invalid=84513, Unknown=0, NotChecked=0, Total=85556 [2020-12-22 11:21:35,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34490 states. [2020-12-22 11:21:35,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34490 to 5485. [2020-12-22 11:21:35,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5485 states. [2020-12-22 11:21:35,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5485 states to 5485 states and 11045 transitions. [2020-12-22 11:21:35,403 INFO L78 Accepts]: Start accepts. Automaton has 5485 states and 11045 transitions. Word has length 148 [2020-12-22 11:21:35,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 11:21:35,403 INFO L481 AbstractCegarLoop]: Abstraction has 5485 states and 11045 transitions. [2020-12-22 11:21:35,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-12-22 11:21:35,404 INFO L276 IsEmpty]: Start isEmpty. Operand 5485 states and 11045 transitions. [2020-12-22 11:21:35,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-22 11:21:35,411 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 11:21:35,411 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 11:21:35,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-22 11:21:35,625 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 11:21:35,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 11:21:35,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1360659218, now seen corresponding path program 34 times [2020-12-22 11:21:35,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 11:21:35,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726197882] [2020-12-22 11:21:35,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 11:21:35,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 11:21:35,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 1292 trivial. 0 not checked. [2020-12-22 11:21:35,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726197882] [2020-12-22 11:21:35,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 11:21:35,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 11:21:35,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010385029] [2020-12-22 11:21:35,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 11:21:35,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 11:21:35,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 11:21:35,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 11:21:35,712 INFO L87 Difference]: Start difference. First operand 5485 states and 11045 transitions. Second operand 3 states. [2020-12-22 11:21:35,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 11:21:35,738 INFO L93 Difference]: Finished difference Result 2945 states and 3782 transitions. [2020-12-22 11:21:35,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 11:21:35,738 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 148 [2020-12-22 11:21:35,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 11:21:35,743 INFO L225 Difference]: With dead ends: 2945 [2020-12-22 11:21:35,743 INFO L226 Difference]: Without dead ends: 2945 [2020-12-22 11:21:35,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 11:21:35,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2945 states. [2020-12-22 11:21:35,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2945 to 2924. [2020-12-22 11:21:35,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2924 states. [2020-12-22 11:21:35,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2924 states to 2924 states and 3760 transitions. [2020-12-22 11:21:35,781 INFO L78 Accepts]: Start accepts. Automaton has 2924 states and 3760 transitions. Word has length 148 [2020-12-22 11:21:35,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 11:21:35,782 INFO L481 AbstractCegarLoop]: Abstraction has 2924 states and 3760 transitions. [2020-12-22 11:21:35,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 11:21:35,782 INFO L276 IsEmpty]: Start isEmpty. Operand 2924 states and 3760 transitions. [2020-12-22 11:21:35,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-22 11:21:35,787 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 11:21:35,787 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 11:21:35,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-12-22 11:21:35,787 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 11:21:35,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 11:21:35,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1931970334, now seen corresponding path program 35 times [2020-12-22 11:21:35,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 11:21:35,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085172233] [2020-12-22 11:21:35,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 11:21:35,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 11:21:38,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 11:21:38,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085172233] [2020-12-22 11:21:38,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291730846] [2020-12-22 11:21:38,946 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 11:21:39,256 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2020-12-22 11:21:39,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 11:21:39,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 125 conjunts are in the unsatisfiable core [2020-12-22 11:21:39,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 11:21:39,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 11:21:39,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 11:21:39,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-12-22 11:21:39,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894731299] [2020-12-22 11:21:39,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-12-22 11:21:39,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 11:21:39,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-12-22 11:21:39,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-12-22 11:21:39,563 INFO L87 Difference]: Start difference. First operand 2924 states and 3760 transitions. Second operand 63 states. [2020-12-22 11:22:17,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 11:22:17,447 INFO L93 Difference]: Finished difference Result 14303 states and 20974 transitions. [2020-12-22 11:22:17,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 294 states. [2020-12-22 11:22:17,448 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 148 [2020-12-22 11:22:17,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 11:22:17,470 INFO L225 Difference]: With dead ends: 14303 [2020-12-22 11:22:17,470 INFO L226 Difference]: Without dead ends: 14301 [2020-12-22 11:22:17,476 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 145 SyntacticMatches, 2 SemanticMatches, 292 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26565 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=1047, Invalid=85095, Unknown=0, NotChecked=0, Total=86142 [2020-12-22 11:22:17,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14301 states. [2020-12-22 11:22:17,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14301 to 2927. [2020-12-22 11:22:17,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2927 states. [2020-12-22 11:22:17,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2927 states to 2927 states and 3764 transitions. [2020-12-22 11:22:17,583 INFO L78 Accepts]: Start accepts. Automaton has 2927 states and 3764 transitions. Word has length 148 [2020-12-22 11:22:17,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 11:22:17,583 INFO L481 AbstractCegarLoop]: Abstraction has 2927 states and 3764 transitions. [2020-12-22 11:22:17,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-12-22 11:22:17,584 INFO L276 IsEmpty]: Start isEmpty. Operand 2927 states and 3764 transitions. [2020-12-22 11:22:17,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-22 11:22:17,588 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 11:22:17,588 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 11:22:17,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-22 11:22:17,803 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 11:22:17,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 11:22:17,803 INFO L82 PathProgramCache]: Analyzing trace with hash -21531294, now seen corresponding path program 36 times [2020-12-22 11:22:17,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 11:22:17,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979249682] [2020-12-22 11:22:17,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 11:22:17,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 11:22:21,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 11:22:21,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979249682] [2020-12-22 11:22:21,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676037337] [2020-12-22 11:22:21,037 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 11:22:21,764 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2020-12-22 11:22:21,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 11:22:21,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 130 conjunts are in the unsatisfiable core [2020-12-22 11:22:21,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 11:22:22,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 11:22:22,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 11:22:22,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-12-22 11:22:22,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57613493] [2020-12-22 11:22:22,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-12-22 11:22:22,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 11:22:22,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-12-22 11:22:22,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-12-22 11:22:22,093 INFO L87 Difference]: Start difference. First operand 2927 states and 3764 transitions. Second operand 63 states. [2020-12-22 11:23:00,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 11:23:00,612 INFO L93 Difference]: Finished difference Result 14307 states and 20976 transitions. [2020-12-22 11:23:00,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 295 states. [2020-12-22 11:23:00,613 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 148 [2020-12-22 11:23:00,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 11:23:00,631 INFO L225 Difference]: With dead ends: 14307 [2020-12-22 11:23:00,632 INFO L226 Difference]: Without dead ends: 14305 [2020-12-22 11:23:00,635 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 145 SyntacticMatches, 2 SemanticMatches, 293 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26796 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=1051, Invalid=85679, Unknown=0, NotChecked=0, Total=86730 [2020-12-22 11:23:00,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14305 states. [2020-12-22 11:23:00,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14305 to 2933. [2020-12-22 11:23:00,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2933 states. [2020-12-22 11:23:00,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2933 states to 2933 states and 3771 transitions. [2020-12-22 11:23:00,741 INFO L78 Accepts]: Start accepts. Automaton has 2933 states and 3771 transitions. Word has length 148 [2020-12-22 11:23:00,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 11:23:00,742 INFO L481 AbstractCegarLoop]: Abstraction has 2933 states and 3771 transitions. [2020-12-22 11:23:00,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-12-22 11:23:00,742 INFO L276 IsEmpty]: Start isEmpty. Operand 2933 states and 3771 transitions. [2020-12-22 11:23:00,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-22 11:23:00,747 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 11:23:00,747 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 11:23:00,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-22 11:23:00,961 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 11:23:00,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 11:23:00,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1820897762, now seen corresponding path program 37 times [2020-12-22 11:23:00,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 11:23:00,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542108022] [2020-12-22 11:23:00,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 11:23:01,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 11:23:04,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 11:23:04,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542108022] [2020-12-22 11:23:04,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412870299] [2020-12-22 11:23:04,165 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 11:23:04,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 11:23:04,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 125 conjunts are in the unsatisfiable core [2020-12-22 11:23:04,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 11:23:04,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 11:23:04,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 11:23:04,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-12-22 11:23:04,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318967889] [2020-12-22 11:23:04,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-12-22 11:23:04,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 11:23:04,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-12-22 11:23:04,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-12-22 11:23:04,633 INFO L87 Difference]: Start difference. First operand 2933 states and 3771 transitions. Second operand 63 states.