/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-6f57305 [2021-01-26 14:17:03,820 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-26 14:17:03,823 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-26 14:17:03,859 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-26 14:17:03,859 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-26 14:17:03,861 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-26 14:17:03,863 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-26 14:17:03,865 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-26 14:17:03,868 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-26 14:17:03,869 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-26 14:17:03,870 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-26 14:17:03,872 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-26 14:17:03,872 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-26 14:17:03,874 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-26 14:17:03,875 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-26 14:17:03,877 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-26 14:17:03,878 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-26 14:17:03,879 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-26 14:17:03,881 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-26 14:17:03,884 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-26 14:17:03,886 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-26 14:17:03,887 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-26 14:17:03,889 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-26 14:17:03,890 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-26 14:17:03,893 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-26 14:17:03,898 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-26 14:17:03,899 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-26 14:17:03,900 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-26 14:17:03,901 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-26 14:17:03,902 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-26 14:17:03,902 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-26 14:17:03,903 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-26 14:17:03,904 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-26 14:17:03,904 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-26 14:17:03,905 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-26 14:17:03,906 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-26 14:17:03,907 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-01-26 14:17:03,937 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-26 14:17:03,937 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-26 14:17:03,939 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-26 14:17:03,939 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-26 14:17:03,939 INFO L138 SettingsManager]: * Use SBE=true [2021-01-26 14:17:03,939 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-26 14:17:03,940 INFO L138 SettingsManager]: * sizeof long=4 [2021-01-26 14:17:03,940 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-26 14:17:03,940 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-01-26 14:17:03,941 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-26 14:17:03,941 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-26 14:17:03,941 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-26 14:17:03,941 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-26 14:17:03,942 INFO L138 SettingsManager]: * sizeof long double=12 [2021-01-26 14:17:03,942 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-26 14:17:03,942 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-26 14:17:03,942 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-26 14:17:03,943 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-26 14:17:03,943 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-26 14:17:03,943 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-01-26 14:17:03,944 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-26 14:17:03,944 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-26 14:17:03,944 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-26 14:17:03,945 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-26 14:17:03,945 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-26 14:17:03,945 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-26 14:17:03,945 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-26 14:17:03,946 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-01-26 14:17:03,946 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-26 14:17:03,946 INFO L138 SettingsManager]: * Minimization of abstraction=NONE [2021-01-26 14:17:03,947 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-26 14:17:04,303 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-26 14:17:04,332 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-26 14:17:04,335 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-26 14:17:04,337 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-26 14:17:04,337 INFO L275 PluginConnector]: CDTParser initialized [2021-01-26 14:17:04,338 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench-2.i [2021-01-26 14:17:04,430 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2c8b3717/88a52058d5714578b92a8cae9bd9b38f/FLAG8b06f7ec9 [2021-01-26 14:17:05,255 INFO L306 CDTParser]: Found 1 translation units. [2021-01-26 14:17:05,256 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench-2.i [2021-01-26 14:17:05,272 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2c8b3717/88a52058d5714578b92a8cae9bd9b38f/FLAG8b06f7ec9 [2021-01-26 14:17:05,470 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2c8b3717/88a52058d5714578b92a8cae9bd9b38f [2021-01-26 14:17:05,473 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-26 14:17:05,505 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-01-26 14:17:05,510 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-26 14:17:05,510 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-26 14:17:05,516 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-26 14:17:05,517 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.01 02:17:05" (1/1) ... [2021-01-26 14:17:05,521 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e1d8b70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.01 02:17:05, skipping insertion in model container [2021-01-26 14:17:05,521 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.01 02:17:05" (1/1) ... [2021-01-26 14:17:05,529 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-26 14:17:05,593 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-26 14:17:06,045 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-26 14:17:06,054 INFO L203 MainTranslator]: Completed pre-run [2021-01-26 14:17:06,109 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-26 14:17:06,221 INFO L208 MainTranslator]: Completed translation [2021-01-26 14:17:06,222 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.01 02:17:06 WrapperNode [2021-01-26 14:17:06,222 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-26 14:17:06,224 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-26 14:17:06,224 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-26 14:17:06,224 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-26 14:17:06,233 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.01 02:17:06" (1/1) ... [2021-01-26 14:17:06,249 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.01 02:17:06" (1/1) ... [2021-01-26 14:17:06,273 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-26 14:17:06,274 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-26 14:17:06,274 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-26 14:17:06,274 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-26 14:17:06,284 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.01 02:17:06" (1/1) ... [2021-01-26 14:17:06,285 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.01 02:17:06" (1/1) ... [2021-01-26 14:17:06,288 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.01 02:17:06" (1/1) ... [2021-01-26 14:17:06,289 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.01 02:17:06" (1/1) ... [2021-01-26 14:17:06,303 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.01 02:17:06" (1/1) ... [2021-01-26 14:17:06,307 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.01 02:17:06" (1/1) ... [2021-01-26 14:17:06,310 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.01 02:17:06" (1/1) ... [2021-01-26 14:17:06,313 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-26 14:17:06,314 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-26 14:17:06,314 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-26 14:17:06,315 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-26 14:17:06,316 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.01 02:17:06" (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 [2021-01-26 14:17:06,404 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-01-26 14:17:06,404 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-01-26 14:17:06,404 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-01-26 14:17:06,404 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-01-26 14:17:06,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-26 14:17:06,405 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-01-26 14:17:06,405 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-26 14:17:06,405 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-26 14:17:06,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-26 14:17:06,405 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-01-26 14:17:06,405 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-26 14:17:06,406 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-26 14:17:06,408 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-01-26 14:17:06,932 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-26 14:17:06,932 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2021-01-26 14:17:06,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.01 02:17:06 BoogieIcfgContainer [2021-01-26 14:17:06,935 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-26 14:17:06,940 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-26 14:17:06,940 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-26 14:17:06,944 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-26 14:17:06,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.01 02:17:05" (1/3) ... [2021-01-26 14:17:06,946 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73960516 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.01 02:17:06, skipping insertion in model container [2021-01-26 14:17:06,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.01 02:17:06" (2/3) ... [2021-01-26 14:17:06,947 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73960516 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.01 02:17:06, skipping insertion in model container [2021-01-26 14:17:06,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.01 02:17:06" (3/3) ... [2021-01-26 14:17:06,949 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench-2.i [2021-01-26 14:17:06,968 WARN L168 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-01-26 14:17:06,969 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-26 14:17:06,974 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-26 14:17:06,975 INFO L351 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-01-26 14:17:07,021 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,022 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,023 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,023 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,023 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,024 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,024 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,024 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,025 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,025 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,026 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,026 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,028 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,028 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,028 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,028 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,029 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,029 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,029 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,029 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,029 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,030 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,030 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,030 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,030 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,031 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,031 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,032 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,032 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,032 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,033 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,033 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,033 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,033 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,034 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,034 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,035 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,035 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,035 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,036 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,037 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,037 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,038 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,038 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,038 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,038 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,039 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,039 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,039 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,039 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,040 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,040 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,040 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,040 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,041 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,041 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,041 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,041 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,044 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,044 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,046 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,047 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,047 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,047 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,047 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,047 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,055 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,055 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,055 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,056 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,056 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,057 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-26 14:17:07,069 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-01-26 14:17:07,084 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-01-26 14:17:07,124 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-26 14:17:07,124 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-26 14:17:07,124 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-26 14:17:07,124 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-26 14:17:07,124 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-26 14:17:07,125 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-26 14:17:07,126 INFO L383 AbstractCegarLoop]: Minimize is NONE [2021-01-26 14:17:07,126 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-26 14:17:07,143 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 67 places, 66 transitions, 142 flow [2021-01-26 14:17:07,310 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2229 states, 2227 states have (on average 3.205208801077683) internal successors, (7138), 2228 states have internal predecessors, (7138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:07,321 INFO L276 IsEmpty]: Start isEmpty. Operand has 2229 states, 2227 states have (on average 3.205208801077683) internal successors, (7138), 2228 states have internal predecessors, (7138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:07,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-26 14:17:07,341 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:07,342 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:07,342 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:07,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:07,349 INFO L82 PathProgramCache]: Analyzing trace with hash 811106412, now seen corresponding path program 1 times [2021-01-26 14:17:07,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:07,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918533076] [2021-01-26 14:17:07,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:07,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:07,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:07,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918533076] [2021-01-26 14:17:07,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-26 14:17:07,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-26 14:17:07,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869155396] [2021-01-26 14:17:07,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-26 14:17:07,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:07,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-26 14:17:07,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-26 14:17:07,856 INFO L87 Difference]: Start difference. First operand has 2229 states, 2227 states have (on average 3.205208801077683) internal successors, (7138), 2228 states have internal predecessors, (7138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:08,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:08,095 INFO L93 Difference]: Finished difference Result 4034 states and 11738 transitions. [2021-01-26 14:17:08,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-26 14:17:08,097 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-01-26 14:17:08,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:08,126 INFO L225 Difference]: With dead ends: 4034 [2021-01-26 14:17:08,126 INFO L226 Difference]: Without dead ends: 1472 [2021-01-26 14:17:08,128 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-01-26 14:17:08,128 INFO L78 Accepts]: Start accepts. Automaton has 1472 states. Word has length 28 [2021-01-26 14:17:08,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:08,130 INFO L481 AbstractCegarLoop]: Abstraction has 1472 states. [2021-01-26 14:17:08,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:08,130 INFO L276 IsEmpty]: Start isEmpty. Operand 1472 states. [2021-01-26 14:17:08,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-26 14:17:08,139 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:08,139 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:08,139 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-26 14:17:08,139 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:08,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:08,140 INFO L82 PathProgramCache]: Analyzing trace with hash -2008820546, now seen corresponding path program 1 times [2021-01-26 14:17:08,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:08,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634262760] [2021-01-26 14:17:08,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:08,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:08,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:08,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634262760] [2021-01-26 14:17:08,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-26 14:17:08,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-01-26 14:17:08,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907207448] [2021-01-26 14:17:08,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-26 14:17:08,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:08,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-26 14:17:08,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-01-26 14:17:08,332 INFO L87 Difference]: Start difference. First operand 1472 states. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:08,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:08,510 INFO L93 Difference]: Finished difference Result 1984 states and 5365 transitions. [2021-01-26 14:17:08,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-26 14:17:08,511 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-01-26 14:17:08,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:08,526 INFO L225 Difference]: With dead ends: 1984 [2021-01-26 14:17:08,527 INFO L226 Difference]: Without dead ends: 1726 [2021-01-26 14:17:08,529 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-01-26 14:17:08,529 INFO L78 Accepts]: Start accepts. Automaton has 1726 states. Word has length 33 [2021-01-26 14:17:08,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:08,530 INFO L481 AbstractCegarLoop]: Abstraction has 1726 states. [2021-01-26 14:17:08,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:08,530 INFO L276 IsEmpty]: Start isEmpty. Operand 1726 states. [2021-01-26 14:17:08,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-26 14:17:08,533 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:08,534 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:08,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-26 14:17:08,534 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:08,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:08,535 INFO L82 PathProgramCache]: Analyzing trace with hash 103991554, now seen corresponding path program 1 times [2021-01-26 14:17:08,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:08,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040787999] [2021-01-26 14:17:08,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:08,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:08,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:08,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040787999] [2021-01-26 14:17:08,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-26 14:17:08,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-01-26 14:17:08,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278686150] [2021-01-26 14:17:08,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-26 14:17:08,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:08,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-26 14:17:08,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-26 14:17:08,756 INFO L87 Difference]: Start difference. First operand 1726 states. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:08,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:08,903 INFO L93 Difference]: Finished difference Result 2110 states and 5584 transitions. [2021-01-26 14:17:08,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-26 14:17:08,904 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-01-26 14:17:08,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:08,918 INFO L225 Difference]: With dead ends: 2110 [2021-01-26 14:17:08,918 INFO L226 Difference]: Without dead ends: 1806 [2021-01-26 14:17:08,919 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-01-26 14:17:08,919 INFO L78 Accepts]: Start accepts. Automaton has 1806 states. Word has length 33 [2021-01-26 14:17:08,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:08,920 INFO L481 AbstractCegarLoop]: Abstraction has 1806 states. [2021-01-26 14:17:08,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:08,920 INFO L276 IsEmpty]: Start isEmpty. Operand 1806 states. [2021-01-26 14:17:08,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-26 14:17:08,923 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:08,924 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:08,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-26 14:17:08,924 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:08,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:08,925 INFO L82 PathProgramCache]: Analyzing trace with hash -899974956, now seen corresponding path program 2 times [2021-01-26 14:17:08,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:08,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199316930] [2021-01-26 14:17:08,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:08,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:09,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:09,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199316930] [2021-01-26 14:17:09,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-26 14:17:09,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-01-26 14:17:09,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870798548] [2021-01-26 14:17:09,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-26 14:17:09,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:09,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-26 14:17:09,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-01-26 14:17:09,103 INFO L87 Difference]: Start difference. First operand 1806 states. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:09,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:09,274 INFO L93 Difference]: Finished difference Result 2318 states and 6128 transitions. [2021-01-26 14:17:09,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-26 14:17:09,275 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-01-26 14:17:09,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:09,290 INFO L225 Difference]: With dead ends: 2318 [2021-01-26 14:17:09,290 INFO L226 Difference]: Without dead ends: 1996 [2021-01-26 14:17:09,290 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-01-26 14:17:09,291 INFO L78 Accepts]: Start accepts. Automaton has 1996 states. Word has length 33 [2021-01-26 14:17:09,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:09,292 INFO L481 AbstractCegarLoop]: Abstraction has 1996 states. [2021-01-26 14:17:09,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:09,292 INFO L276 IsEmpty]: Start isEmpty. Operand 1996 states. [2021-01-26 14:17:09,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-26 14:17:09,297 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:09,297 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:09,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-01-26 14:17:09,298 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:09,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:09,299 INFO L82 PathProgramCache]: Analyzing trace with hash -421493469, now seen corresponding path program 1 times [2021-01-26 14:17:09,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:09,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549293633] [2021-01-26 14:17:09,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:09,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:09,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:09,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549293633] [2021-01-26 14:17:09,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303508044] [2021-01-26 14:17:09,451 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 [2021-01-26 14:17:09,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:09,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-26 14:17:09,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:09,657 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:09,687 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:09,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:09,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:09,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-01-26 14:17:09,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332143527] [2021-01-26 14:17:09,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-26 14:17:09,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:09,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-26 14:17:09,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-01-26 14:17:09,699 INFO L87 Difference]: Start difference. First operand 1996 states. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:09,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:09,963 INFO L93 Difference]: Finished difference Result 2908 states and 7595 transitions. [2021-01-26 14:17:09,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-26 14:17:09,964 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-01-26 14:17:09,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:09,981 INFO L225 Difference]: With dead ends: 2908 [2021-01-26 14:17:09,982 INFO L226 Difference]: Without dead ends: 2544 [2021-01-26 14:17:09,982 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:17:09,982 INFO L78 Accepts]: Start accepts. Automaton has 2544 states. Word has length 38 [2021-01-26 14:17:09,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:09,983 INFO L481 AbstractCegarLoop]: Abstraction has 2544 states. [2021-01-26 14:17:09,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:09,983 INFO L276 IsEmpty]: Start isEmpty. Operand 2544 states. [2021-01-26 14:17:09,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-26 14:17:09,988 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:09,988 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:10,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:10,203 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:10,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:10,204 INFO L82 PathProgramCache]: Analyzing trace with hash -869705744, now seen corresponding path program 1 times [2021-01-26 14:17:10,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:10,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487677073] [2021-01-26 14:17:10,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:10,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:10,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:10,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487677073] [2021-01-26 14:17:10,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-26 14:17:10,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-01-26 14:17:10,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931908151] [2021-01-26 14:17:10,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-26 14:17:10,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:10,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-26 14:17:10,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-01-26 14:17:10,338 INFO L87 Difference]: Start difference. First operand 2544 states. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:10,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:10,464 INFO L93 Difference]: Finished difference Result 2736 states and 7057 transitions. [2021-01-26 14:17:10,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-26 14:17:10,465 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-01-26 14:17:10,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:10,482 INFO L225 Difference]: With dead ends: 2736 [2021-01-26 14:17:10,483 INFO L226 Difference]: Without dead ends: 2584 [2021-01-26 14:17:10,483 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-01-26 14:17:10,483 INFO L78 Accepts]: Start accepts. Automaton has 2584 states. Word has length 38 [2021-01-26 14:17:10,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:10,484 INFO L481 AbstractCegarLoop]: Abstraction has 2584 states. [2021-01-26 14:17:10,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:10,484 INFO L276 IsEmpty]: Start isEmpty. Operand 2584 states. [2021-01-26 14:17:10,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-26 14:17:10,488 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:10,488 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:10,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-01-26 14:17:10,489 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:10,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:10,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1873672254, now seen corresponding path program 2 times [2021-01-26 14:17:10,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:10,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513665479] [2021-01-26 14:17:10,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:10,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:10,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:10,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513665479] [2021-01-26 14:17:10,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-26 14:17:10,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-01-26 14:17:10,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825885398] [2021-01-26 14:17:10,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-26 14:17:10,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:10,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-26 14:17:10,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-01-26 14:17:10,705 INFO L87 Difference]: Start difference. First operand 2584 states. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:10,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:10,907 INFO L93 Difference]: Finished difference Result 3232 states and 8241 transitions. [2021-01-26 14:17:10,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-26 14:17:10,908 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-01-26 14:17:10,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:10,927 INFO L225 Difference]: With dead ends: 3232 [2021-01-26 14:17:10,927 INFO L226 Difference]: Without dead ends: 2974 [2021-01-26 14:17:10,928 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-01-26 14:17:10,928 INFO L78 Accepts]: Start accepts. Automaton has 2974 states. Word has length 38 [2021-01-26 14:17:10,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:10,928 INFO L481 AbstractCegarLoop]: Abstraction has 2974 states. [2021-01-26 14:17:10,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:10,929 INFO L276 IsEmpty]: Start isEmpty. Operand 2974 states. [2021-01-26 14:17:10,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-26 14:17:10,934 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:10,935 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:10,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-01-26 14:17:10,936 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:10,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:10,936 INFO L82 PathProgramCache]: Analyzing trace with hash 425976611, now seen corresponding path program 1 times [2021-01-26 14:17:10,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:10,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369269382] [2021-01-26 14:17:10,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:10,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:11,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:11,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369269382] [2021-01-26 14:17:11,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268758952] [2021-01-26 14:17:11,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:11,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:11,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-26 14:17:11,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:11,280 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:11,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:11,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:11,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-01-26 14:17:11,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066420490] [2021-01-26 14:17:11,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-26 14:17:11,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:11,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-26 14:17:11,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-01-26 14:17:11,300 INFO L87 Difference]: Start difference. First operand 2974 states. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:11,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:11,495 INFO L93 Difference]: Finished difference Result 3614 states and 9100 transitions. [2021-01-26 14:17:11,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-26 14:17:11,496 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-01-26 14:17:11,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:11,539 INFO L225 Difference]: With dead ends: 3614 [2021-01-26 14:17:11,539 INFO L226 Difference]: Without dead ends: 3134 [2021-01-26 14:17:11,540 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-01-26 14:17:11,541 INFO L78 Accepts]: Start accepts. Automaton has 3134 states. Word has length 38 [2021-01-26 14:17:11,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:11,541 INFO L481 AbstractCegarLoop]: Abstraction has 3134 states. [2021-01-26 14:17:11,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:11,541 INFO L276 IsEmpty]: Start isEmpty. Operand 3134 states. [2021-01-26 14:17:11,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-26 14:17:11,546 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:11,547 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:11,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:11,751 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:11,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:11,752 INFO L82 PathProgramCache]: Analyzing trace with hash 662124847, now seen corresponding path program 2 times [2021-01-26 14:17:11,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:11,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403475618] [2021-01-26 14:17:11,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:11,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:11,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:11,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403475618] [2021-01-26 14:17:11,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758398002] [2021-01-26 14:17:11,854 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 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 [2021-01-26 14:17:11,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:17:11,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:11,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-26 14:17:11,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:12,014 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:12,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:12,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:12,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-01-26 14:17:12,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780634723] [2021-01-26 14:17:12,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-26 14:17:12,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:12,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-26 14:17:12,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-01-26 14:17:12,056 INFO L87 Difference]: Start difference. First operand 3134 states. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:12,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:12,301 INFO L93 Difference]: Finished difference Result 3774 states and 9420 transitions. [2021-01-26 14:17:12,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-26 14:17:12,302 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-01-26 14:17:12,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:12,312 INFO L225 Difference]: With dead ends: 3774 [2021-01-26 14:17:12,312 INFO L226 Difference]: Without dead ends: 3294 [2021-01-26 14:17:12,313 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:17:12,313 INFO L78 Accepts]: Start accepts. Automaton has 3294 states. Word has length 38 [2021-01-26 14:17:12,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:12,314 INFO L481 AbstractCegarLoop]: Abstraction has 3294 states. [2021-01-26 14:17:12,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:12,314 INFO L276 IsEmpty]: Start isEmpty. Operand 3294 states. [2021-01-26 14:17:12,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-26 14:17:12,318 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:12,318 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:12,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:12,534 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:12,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:12,535 INFO L82 PathProgramCache]: Analyzing trace with hash 234007381, now seen corresponding path program 3 times [2021-01-26 14:17:12,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:12,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570071802] [2021-01-26 14:17:12,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:12,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:12,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:12,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570071802] [2021-01-26 14:17:12,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065923690] [2021-01-26 14:17:12,619 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 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 [2021-01-26 14:17:12,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-26 14:17:12,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:12,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-26 14:17:12,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:12,745 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:17:12,756 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:12,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:12,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:12,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-01-26 14:17:12,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138059488] [2021-01-26 14:17:12,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-26 14:17:12,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:12,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-26 14:17:12,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-01-26 14:17:12,765 INFO L87 Difference]: Start difference. First operand 3294 states. Second operand has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:12,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:12,943 INFO L93 Difference]: Finished difference Result 3806 states and 9484 transitions. [2021-01-26 14:17:12,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-26 14:17:12,943 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-01-26 14:17:12,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:12,954 INFO L225 Difference]: With dead ends: 3806 [2021-01-26 14:17:12,954 INFO L226 Difference]: Without dead ends: 3484 [2021-01-26 14:17:12,955 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:17:12,955 INFO L78 Accepts]: Start accepts. Automaton has 3484 states. Word has length 38 [2021-01-26 14:17:12,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:12,955 INFO L481 AbstractCegarLoop]: Abstraction has 3484 states. [2021-01-26 14:17:12,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:12,956 INFO L276 IsEmpty]: Start isEmpty. Operand 3484 states. [2021-01-26 14:17:12,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-26 14:17:12,962 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:12,962 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:13,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:13,176 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:13,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:13,177 INFO L82 PathProgramCache]: Analyzing trace with hash 810819243, now seen corresponding path program 1 times [2021-01-26 14:17:13,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:13,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412262366] [2021-01-26 14:17:13,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:13,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:13,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:13,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412262366] [2021-01-26 14:17:13,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651121357] [2021-01-26 14:17:13,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:13,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:13,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-26 14:17:13,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:13,464 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:13,471 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:13,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:13,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-01-26 14:17:13,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056916646] [2021-01-26 14:17:13,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-26 14:17:13,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:13,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-26 14:17:13,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-01-26 14:17:13,474 INFO L87 Difference]: Start difference. First operand 3484 states. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:13,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:13,620 INFO L93 Difference]: Finished difference Result 3676 states and 9127 transitions. [2021-01-26 14:17:13,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-26 14:17:13,621 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-01-26 14:17:13,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:13,632 INFO L225 Difference]: With dead ends: 3676 [2021-01-26 14:17:13,632 INFO L226 Difference]: Without dead ends: 3524 [2021-01-26 14:17:13,633 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:17:13,633 INFO L78 Accepts]: Start accepts. Automaton has 3524 states. Word has length 43 [2021-01-26 14:17:13,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:13,633 INFO L481 AbstractCegarLoop]: Abstraction has 3524 states. [2021-01-26 14:17:13,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:13,634 INFO L276 IsEmpty]: Start isEmpty. Operand 3524 states. [2021-01-26 14:17:13,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-26 14:17:13,640 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:13,640 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:13,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-01-26 14:17:13,856 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:13,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:13,856 INFO L82 PathProgramCache]: Analyzing trace with hash -193147267, now seen corresponding path program 2 times [2021-01-26 14:17:13,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:13,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394023513] [2021-01-26 14:17:13,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:13,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:13,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:13,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394023513] [2021-01-26 14:17:13,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833923281] [2021-01-26 14:17:13,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:14,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:17:14,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:14,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:17:14,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:14,125 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:14,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:14,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:14,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-01-26 14:17:14,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389668731] [2021-01-26 14:17:14,134 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-26 14:17:14,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:14,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-26 14:17:14,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-01-26 14:17:14,135 INFO L87 Difference]: Start difference. First operand 3524 states. Second operand has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:14,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:14,508 INFO L93 Difference]: Finished difference Result 4658 states and 11570 transitions. [2021-01-26 14:17:14,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-26 14:17:14,509 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-01-26 14:17:14,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:14,525 INFO L225 Difference]: With dead ends: 4658 [2021-01-26 14:17:14,525 INFO L226 Difference]: Without dead ends: 4294 [2021-01-26 14:17:14,527 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2021-01-26 14:17:14,527 INFO L78 Accepts]: Start accepts. Automaton has 4294 states. Word has length 43 [2021-01-26 14:17:14,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:14,529 INFO L481 AbstractCegarLoop]: Abstraction has 4294 states. [2021-01-26 14:17:14,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:14,529 INFO L276 IsEmpty]: Start isEmpty. Operand 4294 states. [2021-01-26 14:17:14,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-26 14:17:14,540 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:14,540 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:14,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:14,754 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:14,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:14,755 INFO L82 PathProgramCache]: Analyzing trace with hash -2089322251, now seen corresponding path program 1 times [2021-01-26 14:17:14,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:14,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346308366] [2021-01-26 14:17:14,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:14,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:14,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:14,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346308366] [2021-01-26 14:17:14,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562492145] [2021-01-26 14:17:14,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:14,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:14,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-26 14:17:14,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:15,103 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:15,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:15,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:15,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-01-26 14:17:15,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057104759] [2021-01-26 14:17:15,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-26 14:17:15,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:15,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-26 14:17:15,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-01-26 14:17:15,116 INFO L87 Difference]: Start difference. First operand 4294 states. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:15,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:15,369 INFO L93 Difference]: Finished difference Result 4606 states and 11272 transitions. [2021-01-26 14:17:15,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-26 14:17:15,370 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-01-26 14:17:15,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:15,383 INFO L225 Difference]: With dead ends: 4606 [2021-01-26 14:17:15,383 INFO L226 Difference]: Without dead ends: 4454 [2021-01-26 14:17:15,384 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:17:15,384 INFO L78 Accepts]: Start accepts. Automaton has 4454 states. Word has length 43 [2021-01-26 14:17:15,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:15,384 INFO L481 AbstractCegarLoop]: Abstraction has 4454 states. [2021-01-26 14:17:15,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:15,385 INFO L276 IsEmpty]: Start isEmpty. Operand 4454 states. [2021-01-26 14:17:15,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-26 14:17:15,391 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:15,391 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:15,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:15,607 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:15,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:15,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1853174015, now seen corresponding path program 2 times [2021-01-26 14:17:15,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:15,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835974635] [2021-01-26 14:17:15,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:15,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:15,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:15,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835974635] [2021-01-26 14:17:15,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124982477] [2021-01-26 14:17:15,720 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 [2021-01-26 14:17:15,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:17:15,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:15,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-26 14:17:15,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:15,947 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:15,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:15,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:15,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-01-26 14:17:15,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117059250] [2021-01-26 14:17:15,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-26 14:17:15,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:15,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-26 14:17:15,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-01-26 14:17:15,958 INFO L87 Difference]: Start difference. First operand 4454 states. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:16,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:16,349 INFO L93 Difference]: Finished difference Result 4878 states and 11880 transitions. [2021-01-26 14:17:16,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-26 14:17:16,350 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-01-26 14:17:16,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:16,364 INFO L225 Difference]: With dead ends: 4878 [2021-01-26 14:17:16,364 INFO L226 Difference]: Without dead ends: 4574 [2021-01-26 14:17:16,365 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2021-01-26 14:17:16,365 INFO L78 Accepts]: Start accepts. Automaton has 4574 states. Word has length 43 [2021-01-26 14:17:16,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:16,365 INFO L481 AbstractCegarLoop]: Abstraction has 4574 states. [2021-01-26 14:17:16,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:16,366 INFO L276 IsEmpty]: Start isEmpty. Operand 4574 states. [2021-01-26 14:17:16,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-26 14:17:16,372 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:16,372 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:16,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-26 14:17:16,587 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:16,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:16,587 INFO L82 PathProgramCache]: Analyzing trace with hash 2013675815, now seen corresponding path program 3 times [2021-01-26 14:17:16,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:16,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930791620] [2021-01-26 14:17:16,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:16,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:16,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:16,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930791620] [2021-01-26 14:17:16,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267524489] [2021-01-26 14:17:16,719 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 [2021-01-26 14:17:16,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-26 14:17:16,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:16,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-26 14:17:16,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:16,866 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:17:16,888 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:16,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:16,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:16,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-01-26 14:17:16,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961297877] [2021-01-26 14:17:16,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-26 14:17:16,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:16,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-26 14:17:16,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-01-26 14:17:16,902 INFO L87 Difference]: Start difference. First operand 4574 states. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:17,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:17,588 INFO L93 Difference]: Finished difference Result 6444 states and 15811 transitions. [2021-01-26 14:17:17,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-26 14:17:17,588 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-01-26 14:17:17,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:17,602 INFO L225 Difference]: With dead ends: 6444 [2021-01-26 14:17:17,602 INFO L226 Difference]: Without dead ends: 5804 [2021-01-26 14:17:17,603 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=306, Invalid=1026, Unknown=0, NotChecked=0, Total=1332 [2021-01-26 14:17:17,604 INFO L78 Accepts]: Start accepts. Automaton has 5804 states. Word has length 43 [2021-01-26 14:17:17,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:17,604 INFO L481 AbstractCegarLoop]: Abstraction has 5804 states. [2021-01-26 14:17:17,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:17,604 INFO L276 IsEmpty]: Start isEmpty. Operand 5804 states. [2021-01-26 14:17:17,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-26 14:17:17,613 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:17,613 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:17,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-26 14:17:17,828 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:17,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:17,829 INFO L82 PathProgramCache]: Analyzing trace with hash 264667651, now seen corresponding path program 2 times [2021-01-26 14:17:17,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:17,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481072855] [2021-01-26 14:17:17,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:17,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:17,985 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:17,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481072855] [2021-01-26 14:17:17,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977336818] [2021-01-26 14:17:17,985 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 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 [2021-01-26 14:17:18,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:17:18,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:18,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-26 14:17:18,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:18,201 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:18,227 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:18,238 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:18,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:18,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-01-26 14:17:18,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663785433] [2021-01-26 14:17:18,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-26 14:17:18,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:18,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-26 14:17:18,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-01-26 14:17:18,240 INFO L87 Difference]: Start difference. First operand 5804 states. Second operand has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:18,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:18,586 INFO L93 Difference]: Finished difference Result 6876 states and 16671 transitions. [2021-01-26 14:17:18,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-26 14:17:18,588 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-01-26 14:17:18,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:18,604 INFO L225 Difference]: With dead ends: 6876 [2021-01-26 14:17:18,604 INFO L226 Difference]: Without dead ends: 6512 [2021-01-26 14:17:18,605 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=170, Invalid=532, Unknown=0, NotChecked=0, Total=702 [2021-01-26 14:17:18,605 INFO L78 Accepts]: Start accepts. Automaton has 6512 states. Word has length 48 [2021-01-26 14:17:18,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:18,605 INFO L481 AbstractCegarLoop]: Abstraction has 6512 states. [2021-01-26 14:17:18,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:18,605 INFO L276 IsEmpty]: Start isEmpty. Operand 6512 states. [2021-01-26 14:17:18,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-26 14:17:18,614 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:18,614 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:18,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-26 14:17:18,828 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:18,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:18,829 INFO L82 PathProgramCache]: Analyzing trace with hash -183544624, now seen corresponding path program 3 times [2021-01-26 14:17:18,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:18,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730530194] [2021-01-26 14:17:18,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:18,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:18,989 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:18,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730530194] [2021-01-26 14:17:18,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891158875] [2021-01-26 14:17:18,992 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 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 [2021-01-26 14:17:19,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-26 14:17:19,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:19,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:17:19,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:19,092 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:19,101 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:19,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:19,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-01-26 14:17:19,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677460372] [2021-01-26 14:17:19,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-26 14:17:19,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:19,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-26 14:17:19,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-01-26 14:17:19,103 INFO L87 Difference]: Start difference. First operand 6512 states. Second operand has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:19,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:19,272 INFO L93 Difference]: Finished difference Result 6704 states and 16133 transitions. [2021-01-26 14:17:19,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-26 14:17:19,272 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-01-26 14:17:19,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:19,287 INFO L225 Difference]: With dead ends: 6704 [2021-01-26 14:17:19,287 INFO L226 Difference]: Without dead ends: 6552 [2021-01-26 14:17:19,290 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-01-26 14:17:19,290 INFO L78 Accepts]: Start accepts. Automaton has 6552 states. Word has length 48 [2021-01-26 14:17:19,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:19,290 INFO L481 AbstractCegarLoop]: Abstraction has 6552 states. [2021-01-26 14:17:19,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:19,291 INFO L276 IsEmpty]: Start isEmpty. Operand 6552 states. [2021-01-26 14:17:19,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-26 14:17:19,302 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:19,302 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:19,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-26 14:17:19,515 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:19,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:19,516 INFO L82 PathProgramCache]: Analyzing trace with hash -1187511134, now seen corresponding path program 4 times [2021-01-26 14:17:19,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:19,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840748381] [2021-01-26 14:17:19,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:19,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:19,636 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:19,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840748381] [2021-01-26 14:17:19,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463323173] [2021-01-26 14:17:19,636 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 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 [2021-01-26 14:17:19,692 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-26 14:17:19,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:19,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-26 14:17:19,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:19,826 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:17:19,861 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:19,874 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:19,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:19,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-01-26 14:17:19,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155657574] [2021-01-26 14:17:19,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-26 14:17:19,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:19,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-26 14:17:19,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-01-26 14:17:19,880 INFO L87 Difference]: Start difference. First operand 6552 states. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:20,348 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 16 [2021-01-26 14:17:20,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:20,524 INFO L93 Difference]: Finished difference Result 7606 states and 18416 transitions. [2021-01-26 14:17:20,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-26 14:17:20,524 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-01-26 14:17:20,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:20,539 INFO L225 Difference]: With dead ends: 7606 [2021-01-26 14:17:20,539 INFO L226 Difference]: Without dead ends: 7242 [2021-01-26 14:17:20,545 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=223, Invalid=769, Unknown=0, NotChecked=0, Total=992 [2021-01-26 14:17:20,546 INFO L78 Accepts]: Start accepts. Automaton has 7242 states. Word has length 48 [2021-01-26 14:17:20,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:20,546 INFO L481 AbstractCegarLoop]: Abstraction has 7242 states. [2021-01-26 14:17:20,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:20,546 INFO L276 IsEmpty]: Start isEmpty. Operand 7242 states. [2021-01-26 14:17:20,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-26 14:17:20,555 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:20,556 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:20,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-26 14:17:20,772 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:20,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:20,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1211281178, now seen corresponding path program 1 times [2021-01-26 14:17:20,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:20,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16240874] [2021-01-26 14:17:20,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:20,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:20,902 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:20,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16240874] [2021-01-26 14:17:20,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524231744] [2021-01-26 14:17:20,903 INFO L95 rtionOrderModulation]: Keeping assertion order 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 [2021-01-26 14:17:20,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:20,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-26 14:17:20,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:21,094 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:21,108 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:21,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:21,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-01-26 14:17:21,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531091501] [2021-01-26 14:17:21,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-26 14:17:21,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:21,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-26 14:17:21,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-01-26 14:17:21,113 INFO L87 Difference]: Start difference. First operand 7242 states. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:21,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:21,437 INFO L93 Difference]: Finished difference Result 7554 states and 18118 transitions. [2021-01-26 14:17:21,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-26 14:17:21,438 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-01-26 14:17:21,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:21,451 INFO L225 Difference]: With dead ends: 7554 [2021-01-26 14:17:21,451 INFO L226 Difference]: Without dead ends: 7402 [2021-01-26 14:17:21,452 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2021-01-26 14:17:21,452 INFO L78 Accepts]: Start accepts. Automaton has 7402 states. Word has length 48 [2021-01-26 14:17:21,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:21,452 INFO L481 AbstractCegarLoop]: Abstraction has 7402 states. [2021-01-26 14:17:21,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:21,452 INFO L276 IsEmpty]: Start isEmpty. Operand 7402 states. [2021-01-26 14:17:21,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-26 14:17:21,462 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:21,462 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:21,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:21,676 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:21,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:21,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1447429414, now seen corresponding path program 2 times [2021-01-26 14:17:21,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:21,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903295807] [2021-01-26 14:17:21,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:21,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:21,811 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:21,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903295807] [2021-01-26 14:17:21,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131453725] [2021-01-26 14:17:21,812 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 [2021-01-26 14:17:21,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:17:21,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:21,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-26 14:17:21,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:22,006 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:22,018 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:22,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:22,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-01-26 14:17:22,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548718195] [2021-01-26 14:17:22,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-26 14:17:22,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:22,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-26 14:17:22,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-01-26 14:17:22,020 INFO L87 Difference]: Start difference. First operand 7402 states. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:22,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:22,536 INFO L93 Difference]: Finished difference Result 7634 states and 18278 transitions. [2021-01-26 14:17:22,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-26 14:17:22,537 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-01-26 14:17:22,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:22,548 INFO L225 Difference]: With dead ends: 7634 [2021-01-26 14:17:22,548 INFO L226 Difference]: Without dead ends: 7482 [2021-01-26 14:17:22,549 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=176, Invalid=580, Unknown=0, NotChecked=0, Total=756 [2021-01-26 14:17:22,549 INFO L78 Accepts]: Start accepts. Automaton has 7482 states. Word has length 48 [2021-01-26 14:17:22,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:22,549 INFO L481 AbstractCegarLoop]: Abstraction has 7482 states. [2021-01-26 14:17:22,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:22,550 INFO L276 IsEmpty]: Start isEmpty. Operand 7482 states. [2021-01-26 14:17:22,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-26 14:17:22,559 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:22,559 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:22,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:22,774 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:22,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:22,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1019311948, now seen corresponding path program 3 times [2021-01-26 14:17:22,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:22,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529711758] [2021-01-26 14:17:22,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:22,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:22,901 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:22,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529711758] [2021-01-26 14:17:22,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38899104] [2021-01-26 14:17:22,901 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 [2021-01-26 14:17:22,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-26 14:17:22,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:22,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-26 14:17:22,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:23,084 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:17:23,132 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:23,143 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:23,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:23,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-01-26 14:17:23,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925144990] [2021-01-26 14:17:23,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-26 14:17:23,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:23,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-26 14:17:23,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-01-26 14:17:23,145 INFO L87 Difference]: Start difference. First operand 7482 states. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:23,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:23,883 INFO L93 Difference]: Finished difference Result 9086 states and 21756 transitions. [2021-01-26 14:17:23,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-26 14:17:23,884 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-01-26 14:17:23,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:23,895 INFO L225 Difference]: With dead ends: 9086 [2021-01-26 14:17:23,895 INFO L226 Difference]: Without dead ends: 8722 [2021-01-26 14:17:23,896 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=336, Invalid=1146, Unknown=0, NotChecked=0, Total=1482 [2021-01-26 14:17:23,896 INFO L78 Accepts]: Start accepts. Automaton has 8722 states. Word has length 48 [2021-01-26 14:17:23,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:23,896 INFO L481 AbstractCegarLoop]: Abstraction has 8722 states. [2021-01-26 14:17:23,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:23,897 INFO L276 IsEmpty]: Start isEmpty. Operand 8722 states. [2021-01-26 14:17:23,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-26 14:17:23,905 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:23,905 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:24,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-01-26 14:17:24,106 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:24,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:24,107 INFO L82 PathProgramCache]: Analyzing trace with hash 310617624, now seen corresponding path program 4 times [2021-01-26 14:17:24,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:24,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569104748] [2021-01-26 14:17:24,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:24,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:24,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:24,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569104748] [2021-01-26 14:17:24,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231033769] [2021-01-26 14:17:24,250 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 [2021-01-26 14:17:24,316 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-26 14:17:24,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:24,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-26 14:17:24,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:24,433 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:24,452 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:24,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:24,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-01-26 14:17:24,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403126796] [2021-01-26 14:17:24,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-26 14:17:24,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:24,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-26 14:17:24,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-01-26 14:17:24,458 INFO L87 Difference]: Start difference. First operand 8722 states. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:25,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:25,004 INFO L93 Difference]: Finished difference Result 9234 states and 21858 transitions. [2021-01-26 14:17:25,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-26 14:17:25,004 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-01-26 14:17:25,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:25,020 INFO L225 Difference]: With dead ends: 9234 [2021-01-26 14:17:25,020 INFO L226 Difference]: Without dead ends: 9082 [2021-01-26 14:17:25,021 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2021-01-26 14:17:25,021 INFO L78 Accepts]: Start accepts. Automaton has 9082 states. Word has length 48 [2021-01-26 14:17:25,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:25,022 INFO L481 AbstractCegarLoop]: Abstraction has 9082 states. [2021-01-26 14:17:25,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:25,022 INFO L276 IsEmpty]: Start isEmpty. Operand 9082 states. [2021-01-26 14:17:25,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-26 14:17:25,037 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:25,037 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:25,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:25,252 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:25,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:25,253 INFO L82 PathProgramCache]: Analyzing trace with hash -958721652, now seen corresponding path program 5 times [2021-01-26 14:17:25,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:25,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937422576] [2021-01-26 14:17:25,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:25,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:25,408 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:25,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937422576] [2021-01-26 14:17:25,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034104145] [2021-01-26 14:17:25,409 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 [2021-01-26 14:17:25,468 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:17:25,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:25,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-26 14:17:25,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:25,597 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:25,607 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:25,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:25,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-01-26 14:17:25,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011284866] [2021-01-26 14:17:25,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-26 14:17:25,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:25,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-26 14:17:25,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-01-26 14:17:25,609 INFO L87 Difference]: Start difference. First operand 9082 states. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:26,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:26,157 INFO L93 Difference]: Finished difference Result 9594 states and 22578 transitions. [2021-01-26 14:17:26,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-26 14:17:26,163 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-01-26 14:17:26,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:26,177 INFO L225 Difference]: With dead ends: 9594 [2021-01-26 14:17:26,178 INFO L226 Difference]: Without dead ends: 9442 [2021-01-26 14:17:26,178 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=221, Invalid=709, Unknown=0, NotChecked=0, Total=930 [2021-01-26 14:17:26,179 INFO L78 Accepts]: Start accepts. Automaton has 9442 states. Word has length 48 [2021-01-26 14:17:26,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:26,179 INFO L481 AbstractCegarLoop]: Abstraction has 9442 states. [2021-01-26 14:17:26,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:26,179 INFO L276 IsEmpty]: Start isEmpty. Operand 9442 states. [2021-01-26 14:17:26,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-26 14:17:26,191 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:26,192 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:26,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-01-26 14:17:26,405 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:26,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:26,406 INFO L82 PathProgramCache]: Analyzing trace with hash 763359212, now seen corresponding path program 6 times [2021-01-26 14:17:26,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:26,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500163038] [2021-01-26 14:17:26,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:26,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:26,523 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:26,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500163038] [2021-01-26 14:17:26,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991407206] [2021-01-26 14:17:26,523 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 [2021-01-26 14:17:26,584 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-01-26 14:17:26,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:26,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-26 14:17:26,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:26,685 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:26,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:26,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:26,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-01-26 14:17:26,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582352523] [2021-01-26 14:17:26,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-26 14:17:26,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:26,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-26 14:17:26,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-01-26 14:17:26,695 INFO L87 Difference]: Start difference. First operand 9442 states. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:27,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:27,183 INFO L93 Difference]: Finished difference Result 9834 states and 23058 transitions. [2021-01-26 14:17:27,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-26 14:17:27,183 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-01-26 14:17:27,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:27,275 INFO L225 Difference]: With dead ends: 9834 [2021-01-26 14:17:27,275 INFO L226 Difference]: Without dead ends: 9682 [2021-01-26 14:17:27,276 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=246, Invalid=746, Unknown=0, NotChecked=0, Total=992 [2021-01-26 14:17:27,276 INFO L78 Accepts]: Start accepts. Automaton has 9682 states. Word has length 48 [2021-01-26 14:17:27,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:27,276 INFO L481 AbstractCegarLoop]: Abstraction has 9682 states. [2021-01-26 14:17:27,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:27,276 INFO L276 IsEmpty]: Start isEmpty. Operand 9682 states. [2021-01-26 14:17:27,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-26 14:17:27,284 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:27,284 INFO L504 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:27,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-01-26 14:17:27,492 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:27,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:27,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1519359984, now seen corresponding path program 7 times [2021-01-26 14:17:27,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:27,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097706253] [2021-01-26 14:17:27,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:27,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:27,627 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:27,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097706253] [2021-01-26 14:17:27,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131539508] [2021-01-26 14:17:27,628 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 [2021-01-26 14:17:27,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:27,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-26 14:17:27,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:27,776 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:17:27,786 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:27,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:27,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:27,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-01-26 14:17:27,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213572793] [2021-01-26 14:17:27,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-26 14:17:27,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:27,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-26 14:17:27,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-01-26 14:17:27,797 INFO L87 Difference]: Start difference. First operand 9682 states. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:28,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:28,746 INFO L93 Difference]: Finished difference Result 12196 states and 28643 transitions. [2021-01-26 14:17:28,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-26 14:17:28,747 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-01-26 14:17:28,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:28,763 INFO L225 Difference]: With dead ends: 12196 [2021-01-26 14:17:28,764 INFO L226 Difference]: Without dead ends: 11662 [2021-01-26 14:17:28,765 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=488, Invalid=1674, Unknown=0, NotChecked=0, Total=2162 [2021-01-26 14:17:28,765 INFO L78 Accepts]: Start accepts. Automaton has 11662 states. Word has length 48 [2021-01-26 14:17:28,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:28,765 INFO L481 AbstractCegarLoop]: Abstraction has 11662 states. [2021-01-26 14:17:28,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:28,765 INFO L276 IsEmpty]: Start isEmpty. Operand 11662 states. [2021-01-26 14:17:28,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:17:28,775 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:28,775 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:28,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-01-26 14:17:28,976 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:28,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:28,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1376333259, now seen corresponding path program 5 times [2021-01-26 14:17:28,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:28,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181043870] [2021-01-26 14:17:28,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:28,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:29,133 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:29,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181043870] [2021-01-26 14:17:29,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886218358] [2021-01-26 14:17:29,134 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 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 [2021-01-26 14:17:29,200 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-26 14:17:29,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:29,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:17:29,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:29,348 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:29,365 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:29,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:29,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-26 14:17:29,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360938764] [2021-01-26 14:17:29,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-26 14:17:29,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:29,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-26 14:17:29,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:17:29,367 INFO L87 Difference]: Start difference. First operand 11662 states. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:29,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:29,600 INFO L93 Difference]: Finished difference Result 11854 states and 27668 transitions. [2021-01-26 14:17:29,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-26 14:17:29,601 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-26 14:17:29,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:29,614 INFO L225 Difference]: With dead ends: 11854 [2021-01-26 14:17:29,615 INFO L226 Difference]: Without dead ends: 11702 [2021-01-26 14:17:29,615 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2021-01-26 14:17:29,615 INFO L78 Accepts]: Start accepts. Automaton has 11702 states. Word has length 53 [2021-01-26 14:17:29,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:29,615 INFO L481 AbstractCegarLoop]: Abstraction has 11702 states. [2021-01-26 14:17:29,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:29,616 INFO L276 IsEmpty]: Start isEmpty. Operand 11702 states. [2021-01-26 14:17:29,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:17:29,625 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:29,625 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:29,826 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-01-26 14:17:29,827 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:29,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:29,828 INFO L82 PathProgramCache]: Analyzing trace with hash 372366749, now seen corresponding path program 6 times [2021-01-26 14:17:29,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:29,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083322547] [2021-01-26 14:17:29,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:29,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:30,068 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:30,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083322547] [2021-01-26 14:17:30,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137931355] [2021-01-26 14:17:30,068 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 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 [2021-01-26 14:17:30,127 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-26 14:17:30,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:30,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-26 14:17:30,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:30,186 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:30,201 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:30,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:30,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-01-26 14:17:30,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154599909] [2021-01-26 14:17:30,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-26 14:17:30,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:30,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-26 14:17:30,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-01-26 14:17:30,203 INFO L87 Difference]: Start difference. First operand 11702 states. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:30,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:30,651 INFO L93 Difference]: Finished difference Result 12486 states and 29316 transitions. [2021-01-26 14:17:30,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-26 14:17:30,651 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-26 14:17:30,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:30,674 INFO L225 Difference]: With dead ends: 12486 [2021-01-26 14:17:30,674 INFO L226 Difference]: Without dead ends: 12122 [2021-01-26 14:17:30,675 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=170, Invalid=586, Unknown=0, NotChecked=0, Total=756 [2021-01-26 14:17:30,675 INFO L78 Accepts]: Start accepts. Automaton has 12122 states. Word has length 53 [2021-01-26 14:17:30,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:30,675 INFO L481 AbstractCegarLoop]: Abstraction has 12122 states. [2021-01-26 14:17:30,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:30,676 INFO L276 IsEmpty]: Start isEmpty. Operand 12122 states. [2021-01-26 14:17:30,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:17:30,690 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:30,690 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:30,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-26 14:17:30,904 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:30,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:30,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1523808235, now seen corresponding path program 8 times [2021-01-26 14:17:30,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:30,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699577057] [2021-01-26 14:17:30,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:30,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:31,036 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:31,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699577057] [2021-01-26 14:17:31,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849753581] [2021-01-26 14:17:31,036 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 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 [2021-01-26 14:17:31,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:17:31,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:31,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:17:31,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:31,262 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:31,272 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:31,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:31,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-26 14:17:31,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023742351] [2021-01-26 14:17:31,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-26 14:17:31,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:31,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-26 14:17:31,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:17:31,274 INFO L87 Difference]: Start difference. First operand 12122 states. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:31,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:31,694 INFO L93 Difference]: Finished difference Result 12434 states and 29018 transitions. [2021-01-26 14:17:31,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-26 14:17:31,695 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-26 14:17:31,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:31,708 INFO L225 Difference]: With dead ends: 12434 [2021-01-26 14:17:31,709 INFO L226 Difference]: Without dead ends: 12282 [2021-01-26 14:17:31,709 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=190, Invalid=622, Unknown=0, NotChecked=0, Total=812 [2021-01-26 14:17:31,709 INFO L78 Accepts]: Start accepts. Automaton has 12282 states. Word has length 53 [2021-01-26 14:17:31,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:31,709 INFO L481 AbstractCegarLoop]: Abstraction has 12282 states. [2021-01-26 14:17:31,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:31,710 INFO L276 IsEmpty]: Start isEmpty. Operand 12282 states. [2021-01-26 14:17:31,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:17:31,718 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:31,718 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:31,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:31,919 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:31,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:31,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1287659999, now seen corresponding path program 9 times [2021-01-26 14:17:31,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:31,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095801637] [2021-01-26 14:17:31,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:31,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:32,062 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:32,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095801637] [2021-01-26 14:17:32,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897218672] [2021-01-26 14:17:32,062 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 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 [2021-01-26 14:17:32,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-26 14:17:32,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:32,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-26 14:17:32,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:32,240 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:32,251 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:32,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:32,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-01-26 14:17:32,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375017663] [2021-01-26 14:17:32,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-26 14:17:32,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:32,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-26 14:17:32,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-01-26 14:17:32,254 INFO L87 Difference]: Start difference. First operand 12282 states. Second operand has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:32,604 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 11 [2021-01-26 14:17:32,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:32,795 INFO L93 Difference]: Finished difference Result 12674 states and 29498 transitions. [2021-01-26 14:17:32,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-26 14:17:32,795 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-26 14:17:32,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:32,812 INFO L225 Difference]: With dead ends: 12674 [2021-01-26 14:17:32,812 INFO L226 Difference]: Without dead ends: 12522 [2021-01-26 14:17:32,814 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=183, Invalid=629, Unknown=0, NotChecked=0, Total=812 [2021-01-26 14:17:32,814 INFO L78 Accepts]: Start accepts. Automaton has 12522 states. Word has length 53 [2021-01-26 14:17:32,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:32,815 INFO L481 AbstractCegarLoop]: Abstraction has 12522 states. [2021-01-26 14:17:32,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:32,815 INFO L276 IsEmpty]: Start isEmpty. Operand 12522 states. [2021-01-26 14:17:32,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:17:32,827 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:32,827 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:33,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-26 14:17:33,041 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:33,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:33,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1715777465, now seen corresponding path program 10 times [2021-01-26 14:17:33,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:33,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75801383] [2021-01-26 14:17:33,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:33,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:33,194 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:33,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75801383] [2021-01-26 14:17:33,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478264905] [2021-01-26 14:17:33,194 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 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 [2021-01-26 14:17:33,246 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-26 14:17:33,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:33,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-26 14:17:33,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:33,394 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:17:33,448 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:33,456 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:33,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:33,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-26 14:17:33,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689258249] [2021-01-26 14:17:33,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-26 14:17:33,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:33,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-26 14:17:33,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:17:33,458 INFO L87 Difference]: Start difference. First operand 12522 states. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:34,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:34,304 INFO L93 Difference]: Finished difference Result 13656 states and 31941 transitions. [2021-01-26 14:17:34,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-26 14:17:34,304 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-26 14:17:34,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:34,317 INFO L225 Difference]: With dead ends: 13656 [2021-01-26 14:17:34,318 INFO L226 Difference]: Without dead ends: 13292 [2021-01-26 14:17:34,319 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=399, Invalid=1407, Unknown=0, NotChecked=0, Total=1806 [2021-01-26 14:17:34,319 INFO L78 Accepts]: Start accepts. Automaton has 13292 states. Word has length 53 [2021-01-26 14:17:34,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:34,319 INFO L481 AbstractCegarLoop]: Abstraction has 13292 states. [2021-01-26 14:17:34,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:34,319 INFO L276 IsEmpty]: Start isEmpty. Operand 13292 states. [2021-01-26 14:17:34,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:17:34,333 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:34,333 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:34,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:34,548 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:34,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:34,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1870495507, now seen corresponding path program 11 times [2021-01-26 14:17:34,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:34,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289122059] [2021-01-26 14:17:34,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:34,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:34,696 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:34,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289122059] [2021-01-26 14:17:34,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185664710] [2021-01-26 14:17:34,697 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 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 [2021-01-26 14:17:34,751 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-26 14:17:34,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:34,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:17:34,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:34,952 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:34,963 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:34,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:34,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-26 14:17:34,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444937086] [2021-01-26 14:17:34,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-26 14:17:34,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:34,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-26 14:17:34,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:17:34,967 INFO L87 Difference]: Start difference. First operand 13292 states. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:35,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:35,659 INFO L93 Difference]: Finished difference Result 13804 states and 32043 transitions. [2021-01-26 14:17:35,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-26 14:17:35,660 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-26 14:17:35,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:35,677 INFO L225 Difference]: With dead ends: 13804 [2021-01-26 14:17:35,677 INFO L226 Difference]: Without dead ends: 13652 [2021-01-26 14:17:35,678 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=219, Invalid=711, Unknown=0, NotChecked=0, Total=930 [2021-01-26 14:17:35,678 INFO L78 Accepts]: Start accepts. Automaton has 13652 states. Word has length 53 [2021-01-26 14:17:35,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:35,678 INFO L481 AbstractCegarLoop]: Abstraction has 13652 states. [2021-01-26 14:17:35,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:35,679 INFO L276 IsEmpty]: Start isEmpty. Operand 13652 states. [2021-01-26 14:17:35,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:17:35,692 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:35,692 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:35,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-01-26 14:17:35,894 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:35,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:35,895 INFO L82 PathProgramCache]: Analyzing trace with hash 601156231, now seen corresponding path program 12 times [2021-01-26 14:17:35,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:35,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662325841] [2021-01-26 14:17:35,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:35,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:36,037 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:36,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662325841] [2021-01-26 14:17:36,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042431853] [2021-01-26 14:17:36,038 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 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 [2021-01-26 14:17:36,096 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-26 14:17:36,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:36,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:17:36,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:36,302 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:36,313 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:36,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:36,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-26 14:17:36,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111791765] [2021-01-26 14:17:36,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-26 14:17:36,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:36,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-26 14:17:36,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:17:36,315 INFO L87 Difference]: Start difference. First operand 13652 states. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:37,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:37,071 INFO L93 Difference]: Finished difference Result 13924 states and 32283 transitions. [2021-01-26 14:17:37,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-26 14:17:37,071 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-26 14:17:37,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:37,094 INFO L225 Difference]: With dead ends: 13924 [2021-01-26 14:17:37,094 INFO L226 Difference]: Without dead ends: 13772 [2021-01-26 14:17:37,095 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=265, Invalid=925, Unknown=0, NotChecked=0, Total=1190 [2021-01-26 14:17:37,095 INFO L78 Accepts]: Start accepts. Automaton has 13772 states. Word has length 53 [2021-01-26 14:17:37,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:37,095 INFO L481 AbstractCegarLoop]: Abstraction has 13772 states. [2021-01-26 14:17:37,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:37,096 INFO L276 IsEmpty]: Start isEmpty. Operand 13772 states. [2021-01-26 14:17:37,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:17:37,108 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:37,109 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:37,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:37,310 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:37,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:37,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1971730201, now seen corresponding path program 13 times [2021-01-26 14:17:37,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:37,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954051640] [2021-01-26 14:17:37,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:37,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:37,455 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:37,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954051640] [2021-01-26 14:17:37,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49977130] [2021-01-26 14:17:37,456 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 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 [2021-01-26 14:17:37,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:37,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:17:37,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:37,735 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:37,750 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:37,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:37,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-26 14:17:37,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514259101] [2021-01-26 14:17:37,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-26 14:17:37,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:37,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-26 14:17:37,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:17:37,752 INFO L87 Difference]: Start difference. First operand 13772 states. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:38,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:38,546 INFO L93 Difference]: Finished difference Result 14164 states and 32763 transitions. [2021-01-26 14:17:38,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-26 14:17:38,553 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-26 14:17:38,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:38,569 INFO L225 Difference]: With dead ends: 14164 [2021-01-26 14:17:38,570 INFO L226 Difference]: Without dead ends: 14012 [2021-01-26 14:17:38,570 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=331, Invalid=1075, Unknown=0, NotChecked=0, Total=1406 [2021-01-26 14:17:38,571 INFO L78 Accepts]: Start accepts. Automaton has 14012 states. Word has length 53 [2021-01-26 14:17:38,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:38,571 INFO L481 AbstractCegarLoop]: Abstraction has 14012 states. [2021-01-26 14:17:38,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:38,571 INFO L276 IsEmpty]: Start isEmpty. Operand 14012 states. [2021-01-26 14:17:38,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:17:38,581 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:38,582 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:38,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-01-26 14:17:38,790 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:38,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:38,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1215729429, now seen corresponding path program 14 times [2021-01-26 14:17:38,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:38,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95322536] [2021-01-26 14:17:38,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:38,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:38,916 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:38,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95322536] [2021-01-26 14:17:38,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089672119] [2021-01-26 14:17:38,917 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 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 [2021-01-26 14:17:39,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:17:39,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:39,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:17:39,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:39,282 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:17:39,358 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:39,369 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:39,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:39,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-26 14:17:39,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560720290] [2021-01-26 14:17:39,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-26 14:17:39,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:39,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-26 14:17:39,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:17:39,371 INFO L87 Difference]: Start difference. First operand 14012 states. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:40,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:40,649 INFO L93 Difference]: Finished difference Result 15546 states and 36006 transitions. [2021-01-26 14:17:40,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-26 14:17:40,650 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-26 14:17:40,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:40,667 INFO L225 Difference]: With dead ends: 15546 [2021-01-26 14:17:40,667 INFO L226 Difference]: Without dead ends: 15182 [2021-01-26 14:17:40,668 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=543, Invalid=1809, Unknown=0, NotChecked=0, Total=2352 [2021-01-26 14:17:40,668 INFO L78 Accepts]: Start accepts. Automaton has 15182 states. Word has length 53 [2021-01-26 14:17:40,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:40,668 INFO L481 AbstractCegarLoop]: Abstraction has 15182 states. [2021-01-26 14:17:40,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:40,668 INFO L276 IsEmpty]: Start isEmpty. Operand 15182 states. [2021-01-26 14:17:40,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:17:40,678 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:40,679 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:40,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:40,879 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:40,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:40,880 INFO L82 PathProgramCache]: Analyzing trace with hash 680245205, now seen corresponding path program 15 times [2021-01-26 14:17:40,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:40,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625530719] [2021-01-26 14:17:40,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:40,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:41,015 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:41,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625530719] [2021-01-26 14:17:41,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020006772] [2021-01-26 14:17:41,016 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 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 [2021-01-26 14:17:41,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-26 14:17:41,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:41,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:17:41,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:41,231 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:41,241 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:41,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:41,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-26 14:17:41,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458923311] [2021-01-26 14:17:41,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-26 14:17:41,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:41,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-26 14:17:41,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:17:41,243 INFO L87 Difference]: Start difference. First operand 15182 states. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:41,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:41,766 INFO L93 Difference]: Finished difference Result 15734 states and 36188 transitions. [2021-01-26 14:17:41,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-26 14:17:41,767 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-26 14:17:41,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:41,783 INFO L225 Difference]: With dead ends: 15734 [2021-01-26 14:17:41,783 INFO L226 Difference]: Without dead ends: 15582 [2021-01-26 14:17:41,784 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=240, Invalid=752, Unknown=0, NotChecked=0, Total=992 [2021-01-26 14:17:41,784 INFO L78 Accepts]: Start accepts. Automaton has 15582 states. Word has length 53 [2021-01-26 14:17:41,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:41,784 INFO L481 AbstractCegarLoop]: Abstraction has 15582 states. [2021-01-26 14:17:41,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:41,784 INFO L276 IsEmpty]: Start isEmpty. Operand 15582 states. [2021-01-26 14:17:41,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:17:41,794 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:41,794 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:41,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-01-26 14:17:41,995 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:41,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:41,996 INFO L82 PathProgramCache]: Analyzing trace with hash -2086681651, now seen corresponding path program 16 times [2021-01-26 14:17:41,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:41,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463675204] [2021-01-26 14:17:41,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:42,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:42,135 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:42,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463675204] [2021-01-26 14:17:42,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538944391] [2021-01-26 14:17:42,136 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 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 [2021-01-26 14:17:42,190 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-26 14:17:42,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:42,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-26 14:17:42,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:42,356 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:42,367 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:42,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:42,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-26 14:17:42,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932232045] [2021-01-26 14:17:42,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-26 14:17:42,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:42,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-26 14:17:42,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:17:42,370 INFO L87 Difference]: Start difference. First operand 15582 states. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:43,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:43,106 INFO L93 Difference]: Finished difference Result 16246 states and 37276 transitions. [2021-01-26 14:17:43,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-26 14:17:43,106 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-26 14:17:43,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:43,125 INFO L225 Difference]: With dead ends: 16246 [2021-01-26 14:17:43,126 INFO L226 Difference]: Without dead ends: 15942 [2021-01-26 14:17:43,126 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-01-26 14:17:43,126 INFO L78 Accepts]: Start accepts. Automaton has 15942 states. Word has length 53 [2021-01-26 14:17:43,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:43,127 INFO L481 AbstractCegarLoop]: Abstraction has 15942 states. [2021-01-26 14:17:43,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:43,127 INFO L276 IsEmpty]: Start isEmpty. Operand 15942 states. [2021-01-26 14:17:43,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:17:43,137 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:43,137 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:43,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:43,338 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:43,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:43,339 INFO L82 PathProgramCache]: Analyzing trace with hash 409323335, now seen corresponding path program 17 times [2021-01-26 14:17:43,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:43,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751025778] [2021-01-26 14:17:43,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:43,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:43,482 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:43,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751025778] [2021-01-26 14:17:43,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073146426] [2021-01-26 14:17:43,482 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 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 [2021-01-26 14:17:43,535 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-26 14:17:43,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:43,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:17:43,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:43,684 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:43,693 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:43,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:43,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-26 14:17:43,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087423704] [2021-01-26 14:17:43,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-26 14:17:43,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:43,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-26 14:17:43,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:17:43,698 INFO L87 Difference]: Start difference. First operand 15942 states. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:44,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:44,285 INFO L93 Difference]: Finished difference Result 16294 states and 37308 transitions. [2021-01-26 14:17:44,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-26 14:17:44,285 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-26 14:17:44,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:44,304 INFO L225 Difference]: With dead ends: 16294 [2021-01-26 14:17:44,304 INFO L226 Difference]: Without dead ends: 16142 [2021-01-26 14:17:44,304 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=266, Invalid=790, Unknown=0, NotChecked=0, Total=1056 [2021-01-26 14:17:44,305 INFO L78 Accepts]: Start accepts. Automaton has 16142 states. Word has length 53 [2021-01-26 14:17:44,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:44,305 INFO L481 AbstractCegarLoop]: Abstraction has 16142 states. [2021-01-26 14:17:44,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:44,305 INFO L276 IsEmpty]: Start isEmpty. Operand 16142 states. [2021-01-26 14:17:44,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:17:44,316 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:44,316 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:44,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-01-26 14:17:44,517 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:44,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:44,518 INFO L82 PathProgramCache]: Analyzing trace with hash -284076831, now seen corresponding path program 18 times [2021-01-26 14:17:44,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:44,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878171690] [2021-01-26 14:17:44,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:44,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:44,648 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:44,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878171690] [2021-01-26 14:17:44,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607005655] [2021-01-26 14:17:44,649 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 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 [2021-01-26 14:17:44,707 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-26 14:17:44,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:44,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:17:44,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:44,868 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:44,881 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:44,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:44,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-26 14:17:44,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384824380] [2021-01-26 14:17:44,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-26 14:17:44,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:44,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-26 14:17:44,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:17:44,883 INFO L87 Difference]: Start difference. First operand 16142 states. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:45,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:45,554 INFO L93 Difference]: Finished difference Result 16734 states and 38188 transitions. [2021-01-26 14:17:45,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-01-26 14:17:45,555 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-26 14:17:45,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:45,572 INFO L225 Difference]: With dead ends: 16734 [2021-01-26 14:17:45,573 INFO L226 Difference]: Without dead ends: 16582 [2021-01-26 14:17:45,573 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=302, Invalid=1030, Unknown=0, NotChecked=0, Total=1332 [2021-01-26 14:17:45,573 INFO L78 Accepts]: Start accepts. Automaton has 16582 states. Word has length 53 [2021-01-26 14:17:45,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:45,573 INFO L481 AbstractCegarLoop]: Abstraction has 16582 states. [2021-01-26 14:17:45,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:45,574 INFO L276 IsEmpty]: Start isEmpty. Operand 16582 states. [2021-01-26 14:17:45,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:17:45,584 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:45,584 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:45,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-01-26 14:17:45,785 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:45,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:45,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1243963609, now seen corresponding path program 19 times [2021-01-26 14:17:45,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:45,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101910284] [2021-01-26 14:17:45,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:45,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:46,081 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:46,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101910284] [2021-01-26 14:17:46,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789223070] [2021-01-26 14:17:46,082 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 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 [2021-01-26 14:17:46,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:46,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:17:46,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:46,281 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:46,287 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:46,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:46,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-26 14:17:46,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013543482] [2021-01-26 14:17:46,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-26 14:17:46,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:46,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-26 14:17:46,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:17:46,289 INFO L87 Difference]: Start difference. First operand 16582 states. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:47,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:47,040 INFO L93 Difference]: Finished difference Result 17166 states and 39116 transitions. [2021-01-26 14:17:47,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-26 14:17:47,041 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-26 14:17:47,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:47,059 INFO L225 Difference]: With dead ends: 17166 [2021-01-26 14:17:47,059 INFO L226 Difference]: Without dead ends: 16862 [2021-01-26 14:17:47,060 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=345, Invalid=1215, Unknown=0, NotChecked=0, Total=1560 [2021-01-26 14:17:47,060 INFO L78 Accepts]: Start accepts. Automaton has 16862 states. Word has length 53 [2021-01-26 14:17:47,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:47,060 INFO L481 AbstractCegarLoop]: Abstraction has 16862 states. [2021-01-26 14:17:47,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:47,061 INFO L276 IsEmpty]: Start isEmpty. Operand 16862 states. [2021-01-26 14:17:47,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:17:47,073 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:47,073 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:47,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-01-26 14:17:47,288 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:47,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:47,288 INFO L82 PathProgramCache]: Analyzing trace with hash -554998701, now seen corresponding path program 20 times [2021-01-26 14:17:47,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:47,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472707105] [2021-01-26 14:17:47,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:47,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:47,428 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:47,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472707105] [2021-01-26 14:17:47,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789435662] [2021-01-26 14:17:47,428 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 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 [2021-01-26 14:17:47,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:17:47,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:47,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:17:47,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:47,633 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:47,640 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:47,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:47,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-26 14:17:47,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262987052] [2021-01-26 14:17:47,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-26 14:17:47,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:47,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-26 14:17:47,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:17:47,641 INFO L87 Difference]: Start difference. First operand 16862 states. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:48,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:48,425 INFO L93 Difference]: Finished difference Result 17294 states and 39308 transitions. [2021-01-26 14:17:48,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-26 14:17:48,425 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-26 14:17:48,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:48,443 INFO L225 Difference]: With dead ends: 17294 [2021-01-26 14:17:48,444 INFO L226 Difference]: Without dead ends: 17142 [2021-01-26 14:17:48,444 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=351, Invalid=1131, Unknown=0, NotChecked=0, Total=1482 [2021-01-26 14:17:48,444 INFO L78 Accepts]: Start accepts. Automaton has 17142 states. Word has length 53 [2021-01-26 14:17:48,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:48,445 INFO L481 AbstractCegarLoop]: Abstraction has 17142 states. [2021-01-26 14:17:48,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:48,445 INFO L276 IsEmpty]: Start isEmpty. Operand 17142 states. [2021-01-26 14:17:48,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:17:48,455 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:48,455 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:48,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-01-26 14:17:48,656 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:48,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:48,657 INFO L82 PathProgramCache]: Analyzing trace with hash -2036829567, now seen corresponding path program 21 times [2021-01-26 14:17:48,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:48,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341968816] [2021-01-26 14:17:48,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:48,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:48,778 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:48,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341968816] [2021-01-26 14:17:48,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034354066] [2021-01-26 14:17:48,778 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 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 [2021-01-26 14:17:48,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-26 14:17:48,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:48,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:17:48,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:48,976 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:48,982 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:48,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:48,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-26 14:17:48,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538927603] [2021-01-26 14:17:48,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-26 14:17:48,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:48,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-26 14:17:48,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:17:48,984 INFO L87 Difference]: Start difference. First operand 17142 states. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:49,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:49,994 INFO L93 Difference]: Finished difference Result 17614 states and 39948 transitions. [2021-01-26 14:17:49,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-26 14:17:49,994 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-26 14:17:49,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:50,014 INFO L225 Difference]: With dead ends: 17614 [2021-01-26 14:17:50,015 INFO L226 Difference]: Without dead ends: 17462 [2021-01-26 14:17:50,015 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=392, Invalid=1248, Unknown=0, NotChecked=0, Total=1640 [2021-01-26 14:17:50,015 INFO L78 Accepts]: Start accepts. Automaton has 17462 states. Word has length 53 [2021-01-26 14:17:50,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:50,016 INFO L481 AbstractCegarLoop]: Abstraction has 17462 states. [2021-01-26 14:17:50,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:50,016 INFO L276 IsEmpty]: Start isEmpty. Operand 17462 states. [2021-01-26 14:17:50,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:17:50,029 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:50,029 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:50,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:50,230 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:50,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:50,231 INFO L82 PathProgramCache]: Analyzing trace with hash -508789127, now seen corresponding path program 22 times [2021-01-26 14:17:50,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:50,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036953850] [2021-01-26 14:17:50,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:50,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:50,390 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:50,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036953850] [2021-01-26 14:17:50,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642855302] [2021-01-26 14:17:50,390 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 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 [2021-01-26 14:17:50,449 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-26 14:17:50,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:50,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-26 14:17:50,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:50,603 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:50,615 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:50,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:50,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-26 14:17:50,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486037006] [2021-01-26 14:17:50,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-26 14:17:50,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:50,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-26 14:17:50,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:17:50,617 INFO L87 Difference]: Start difference. First operand 17462 states. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:51,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:51,503 INFO L93 Difference]: Finished difference Result 17774 states and 40268 transitions. [2021-01-26 14:17:51,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-26 14:17:51,504 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-26 14:17:51,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:51,524 INFO L225 Difference]: With dead ends: 17774 [2021-01-26 14:17:51,524 INFO L226 Difference]: Without dead ends: 17622 [2021-01-26 14:17:51,524 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=363, Invalid=1197, Unknown=0, NotChecked=0, Total=1560 [2021-01-26 14:17:51,525 INFO L78 Accepts]: Start accepts. Automaton has 17622 states. Word has length 53 [2021-01-26 14:17:51,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:51,525 INFO L481 AbstractCegarLoop]: Abstraction has 17622 states. [2021-01-26 14:17:51,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:51,525 INFO L276 IsEmpty]: Start isEmpty. Operand 17622 states. [2021-01-26 14:17:51,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:17:51,539 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:51,539 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:51,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-01-26 14:17:51,740 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:51,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:51,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1606714029, now seen corresponding path program 23 times [2021-01-26 14:17:51,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:51,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900278225] [2021-01-26 14:17:51,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:51,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:51,866 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:51,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900278225] [2021-01-26 14:17:51,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857276107] [2021-01-26 14:17:51,867 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:51,928 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-26 14:17:51,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:51,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:17:51,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:52,085 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:52,096 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:52,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:52,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-26 14:17:52,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223303174] [2021-01-26 14:17:52,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-26 14:17:52,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:52,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-26 14:17:52,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:17:52,098 INFO L87 Difference]: Start difference. First operand 17622 states. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:52,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:52,970 INFO L93 Difference]: Finished difference Result 18424 states and 41853 transitions. [2021-01-26 14:17:52,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-26 14:17:52,970 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-26 14:17:52,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:52,992 INFO L225 Difference]: With dead ends: 18424 [2021-01-26 14:17:52,993 INFO L226 Difference]: Without dead ends: 18272 [2021-01-26 14:17:52,994 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=382, Invalid=1178, Unknown=0, NotChecked=0, Total=1560 [2021-01-26 14:17:52,994 INFO L78 Accepts]: Start accepts. Automaton has 18272 states. Word has length 53 [2021-01-26 14:17:52,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:52,994 INFO L481 AbstractCegarLoop]: Abstraction has 18272 states. [2021-01-26 14:17:52,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:52,994 INFO L276 IsEmpty]: Start isEmpty. Operand 18272 states. [2021-01-26 14:17:53,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:17:53,008 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:53,008 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:53,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-01-26 14:17:53,223 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:53,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:53,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1932252495, now seen corresponding path program 24 times [2021-01-26 14:17:53,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:53,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133570598] [2021-01-26 14:17:53,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:53,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:53,373 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:53,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133570598] [2021-01-26 14:17:53,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474209115] [2021-01-26 14:17:53,373 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:53,430 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-26 14:17:53,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:53,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:17:53,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:53,583 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:17:53,620 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:53,628 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:53,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:53,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-26 14:17:53,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970893548] [2021-01-26 14:17:53,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-26 14:17:53,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:53,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-26 14:17:53,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:17:53,629 INFO L87 Difference]: Start difference. First operand 18272 states. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:54,764 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 11 [2021-01-26 14:17:55,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:55,046 INFO L93 Difference]: Finished difference Result 21316 states and 48403 transitions. [2021-01-26 14:17:55,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-01-26 14:17:55,047 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-26 14:17:55,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:55,070 INFO L225 Difference]: With dead ends: 21316 [2021-01-26 14:17:55,070 INFO L226 Difference]: Without dead ends: 20782 [2021-01-26 14:17:55,071 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=656, Invalid=2314, Unknown=0, NotChecked=0, Total=2970 [2021-01-26 14:17:55,071 INFO L78 Accepts]: Start accepts. Automaton has 20782 states. Word has length 53 [2021-01-26 14:17:55,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:55,071 INFO L481 AbstractCegarLoop]: Abstraction has 20782 states. [2021-01-26 14:17:55,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:55,072 INFO L276 IsEmpty]: Start isEmpty. Operand 20782 states. [2021-01-26 14:17:55,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:17:55,085 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:55,085 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:55,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:55,286 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:55,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:55,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1379521645, now seen corresponding path program 25 times [2021-01-26 14:17:55,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:55,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983930728] [2021-01-26 14:17:55,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:55,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:55,410 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:55,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983930728] [2021-01-26 14:17:55,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449563404] [2021-01-26 14:17:55,411 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:55,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:55,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:17:55,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:55,608 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:55,617 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:55,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:55,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-26 14:17:55,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087719748] [2021-01-26 14:17:55,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-26 14:17:55,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:55,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-26 14:17:55,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:17:55,619 INFO L87 Difference]: Start difference. First operand 20782 states. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:56,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:56,620 INFO L93 Difference]: Finished difference Result 21604 states and 48783 transitions. [2021-01-26 14:17:56,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-26 14:17:56,621 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-26 14:17:56,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:56,645 INFO L225 Difference]: With dead ends: 21604 [2021-01-26 14:17:56,645 INFO L226 Difference]: Without dead ends: 21452 [2021-01-26 14:17:56,646 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=500, Invalid=1570, Unknown=0, NotChecked=0, Total=2070 [2021-01-26 14:17:56,646 INFO L78 Accepts]: Start accepts. Automaton has 21452 states. Word has length 53 [2021-01-26 14:17:56,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:56,646 INFO L481 AbstractCegarLoop]: Abstraction has 21452 states. [2021-01-26 14:17:56,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:56,647 INFO L276 IsEmpty]: Start isEmpty. Operand 21452 states. [2021-01-26 14:17:56,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:17:56,664 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:56,664 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:56,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-01-26 14:17:56,879 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:56,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:56,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1807639111, now seen corresponding path program 26 times [2021-01-26 14:17:56,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:56,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797250333] [2021-01-26 14:17:56,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:56,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:57,035 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:57,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797250333] [2021-01-26 14:17:57,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125184558] [2021-01-26 14:17:57,036 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:57,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:17:57,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:57,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:17:57,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:57,217 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:17:57,232 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:57,240 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:57,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:57,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-26 14:17:57,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622875651] [2021-01-26 14:17:57,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-26 14:17:57,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:57,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-26 14:17:57,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:17:57,241 INFO L87 Difference]: Start difference. First operand 21452 states. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:58,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:17:58,726 INFO L93 Difference]: Finished difference Result 24006 states and 54448 transitions. [2021-01-26 14:17:58,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-01-26 14:17:58,726 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-26 14:17:58,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:17:58,752 INFO L225 Difference]: With dead ends: 24006 [2021-01-26 14:17:58,752 INFO L226 Difference]: Without dead ends: 23472 [2021-01-26 14:17:58,753 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1171 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=789, Invalid=2751, Unknown=0, NotChecked=0, Total=3540 [2021-01-26 14:17:58,753 INFO L78 Accepts]: Start accepts. Automaton has 23472 states. Word has length 53 [2021-01-26 14:17:58,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:17:58,753 INFO L481 AbstractCegarLoop]: Abstraction has 23472 states. [2021-01-26 14:17:58,754 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:17:58,754 INFO L276 IsEmpty]: Start isEmpty. Operand 23472 states. [2021-01-26 14:17:58,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:17:58,768 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:17:58,768 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:17:58,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:58,969 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:17:58,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:17:58,969 INFO L82 PathProgramCache]: Analyzing trace with hash 75989787, now seen corresponding path program 27 times [2021-01-26 14:17:58,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:17:58,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025884368] [2021-01-26 14:17:58,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:17:58,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:17:59,108 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:59,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025884368] [2021-01-26 14:17:59,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121762084] [2021-01-26 14:17:59,109 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:17:59,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-26 14:17:59,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:17:59,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:17:59,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:17:59,506 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:17:59,512 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:17:59,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:17:59,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-26 14:17:59,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663410777] [2021-01-26 14:17:59,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-26 14:17:59,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:17:59,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-26 14:17:59,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:17:59,514 INFO L87 Difference]: Start difference. First operand 23472 states. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:00,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:18:00,538 INFO L93 Difference]: Finished difference Result 24104 states and 54353 transitions. [2021-01-26 14:18:00,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-26 14:18:00,538 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-26 14:18:00,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:18:00,563 INFO L225 Difference]: With dead ends: 24104 [2021-01-26 14:18:00,563 INFO L226 Difference]: Without dead ends: 23952 [2021-01-26 14:18:00,564 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=492, Invalid=1578, Unknown=0, NotChecked=0, Total=2070 [2021-01-26 14:18:00,564 INFO L78 Accepts]: Start accepts. Automaton has 23952 states. Word has length 53 [2021-01-26 14:18:00,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:18:00,564 INFO L481 AbstractCegarLoop]: Abstraction has 23952 states. [2021-01-26 14:18:00,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:00,564 INFO L276 IsEmpty]: Start isEmpty. Operand 23952 states. [2021-01-26 14:18:00,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:18:00,578 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:18:00,578 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:18:00,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-01-26 14:18:00,779 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:18:00,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:18:00,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1798070651, now seen corresponding path program 28 times [2021-01-26 14:18:00,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:18:00,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766415874] [2021-01-26 14:18:00,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:18:00,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:00,903 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:00,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766415874] [2021-01-26 14:18:00,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939624423] [2021-01-26 14:18:00,903 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:18:00,954 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-26 14:18:00,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:18:00,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-26 14:18:00,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:18:01,103 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:01,114 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:01,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:18:01,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-26 14:18:01,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493425635] [2021-01-26 14:18:01,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-26 14:18:01,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:18:01,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-26 14:18:01,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:18:01,117 INFO L87 Difference]: Start difference. First operand 23952 states. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:02,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:18:02,212 INFO L93 Difference]: Finished difference Result 25454 states and 57148 transitions. [2021-01-26 14:18:02,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-26 14:18:02,213 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-26 14:18:02,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:18:02,445 INFO L225 Difference]: With dead ends: 25454 [2021-01-26 14:18:02,445 INFO L226 Difference]: Without dead ends: 25302 [2021-01-26 14:18:02,446 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=467, Invalid=1425, Unknown=0, NotChecked=0, Total=1892 [2021-01-26 14:18:02,446 INFO L78 Accepts]: Start accepts. Automaton has 25302 states. Word has length 53 [2021-01-26 14:18:02,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:18:02,447 INFO L481 AbstractCegarLoop]: Abstraction has 25302 states. [2021-01-26 14:18:02,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:02,447 INFO L276 IsEmpty]: Start isEmpty. Operand 25302 states. [2021-01-26 14:18:02,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:18:02,460 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:18:02,460 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:18:02,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:18:02,661 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:18:02,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:18:02,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1740895873, now seen corresponding path program 29 times [2021-01-26 14:18:02,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:18:02,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655814305] [2021-01-26 14:18:02,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:18:02,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:02,804 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:02,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655814305] [2021-01-26 14:18:02,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57142054] [2021-01-26 14:18:02,805 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:18:02,865 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-26 14:18:02,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:18:02,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:18:02,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:18:03,016 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:18:03,077 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:03,084 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:03,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:18:03,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-26 14:18:03,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456604963] [2021-01-26 14:18:03,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-26 14:18:03,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:18:03,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-26 14:18:03,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:18:03,085 INFO L87 Difference]: Start difference. First operand 25302 states. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:04,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:18:04,714 INFO L93 Difference]: Finished difference Result 28376 states and 64041 transitions. [2021-01-26 14:18:04,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-01-26 14:18:04,715 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-26 14:18:04,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:18:04,760 INFO L225 Difference]: With dead ends: 28376 [2021-01-26 14:18:04,760 INFO L226 Difference]: Without dead ends: 28012 [2021-01-26 14:18:04,761 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 967 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=738, Invalid=2342, Unknown=0, NotChecked=0, Total=3080 [2021-01-26 14:18:04,762 INFO L78 Accepts]: Start accepts. Automaton has 28012 states. Word has length 53 [2021-01-26 14:18:04,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:18:04,762 INFO L481 AbstractCegarLoop]: Abstraction has 28012 states. [2021-01-26 14:18:04,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:04,762 INFO L276 IsEmpty]: Start isEmpty. Operand 28012 states. [2021-01-26 14:18:04,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:18:04,783 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:18:04,783 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:18:04,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-01-26 14:18:04,997 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:18:04,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:18:04,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1299793979, now seen corresponding path program 30 times [2021-01-26 14:18:04,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:18:04,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264275034] [2021-01-26 14:18:04,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:18:05,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:05,148 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:05,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264275034] [2021-01-26 14:18:05,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113181506] [2021-01-26 14:18:05,149 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:18:05,203 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-01-26 14:18:05,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:18:05,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:18:05,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:18:05,344 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:05,353 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:05,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:18:05,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-26 14:18:05,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196248494] [2021-01-26 14:18:05,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-26 14:18:05,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:18:05,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-26 14:18:05,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:18:05,355 INFO L87 Difference]: Start difference. First operand 28012 states. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:05,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:18:05,809 INFO L93 Difference]: Finished difference Result 29084 states and 65263 transitions. [2021-01-26 14:18:05,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-26 14:18:05,809 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-26 14:18:05,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:18:05,839 INFO L225 Difference]: With dead ends: 29084 [2021-01-26 14:18:05,840 INFO L226 Difference]: Without dead ends: 28932 [2021-01-26 14:18:05,840 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=201, Invalid=555, Unknown=0, NotChecked=0, Total=756 [2021-01-26 14:18:05,840 INFO L78 Accepts]: Start accepts. Automaton has 28932 states. Word has length 53 [2021-01-26 14:18:05,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:18:05,841 INFO L481 AbstractCegarLoop]: Abstraction has 28932 states. [2021-01-26 14:18:05,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:05,841 INFO L276 IsEmpty]: Start isEmpty. Operand 28932 states. [2021-01-26 14:18:05,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:18:05,856 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:18:05,857 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:18:06,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-01-26 14:18:06,058 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:18:06,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:18:06,059 INFO L82 PathProgramCache]: Analyzing trace with hash 880108089, now seen corresponding path program 31 times [2021-01-26 14:18:06,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:18:06,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518465897] [2021-01-26 14:18:06,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:18:06,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:06,183 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:06,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518465897] [2021-01-26 14:18:06,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240768017] [2021-01-26 14:18:06,184 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:18:06,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:06,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:18:06,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:18:06,384 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:06,391 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:06,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:18:06,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-26 14:18:06,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102476820] [2021-01-26 14:18:06,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-26 14:18:06,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:18:06,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-26 14:18:06,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:18:06,393 INFO L87 Difference]: Start difference. First operand 28932 states. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:07,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:18:07,114 INFO L93 Difference]: Finished difference Result 29724 states and 66543 transitions. [2021-01-26 14:18:07,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-26 14:18:07,116 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-26 14:18:07,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:18:07,160 INFO L225 Difference]: With dead ends: 29724 [2021-01-26 14:18:07,160 INFO L226 Difference]: Without dead ends: 29572 [2021-01-26 14:18:07,160 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=243, Invalid=687, Unknown=0, NotChecked=0, Total=930 [2021-01-26 14:18:07,160 INFO L78 Accepts]: Start accepts. Automaton has 29572 states. Word has length 53 [2021-01-26 14:18:07,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:18:07,161 INFO L481 AbstractCegarLoop]: Abstraction has 29572 states. [2021-01-26 14:18:07,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:07,161 INFO L276 IsEmpty]: Start isEmpty. Operand 29572 states. [2021-01-26 14:18:07,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:18:07,180 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:18:07,180 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:18:07,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:18:07,381 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:18:07,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:18:07,382 INFO L82 PathProgramCache]: Analyzing trace with hash -958412647, now seen corresponding path program 32 times [2021-01-26 14:18:07,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:18:07,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718677138] [2021-01-26 14:18:07,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:18:07,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:07,530 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:07,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718677138] [2021-01-26 14:18:07,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188588812] [2021-01-26 14:18:07,531 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:18:07,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:18:07,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:18:07,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:18:07,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:18:07,758 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:07,770 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:07,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:18:07,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-26 14:18:07,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615560587] [2021-01-26 14:18:07,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-26 14:18:07,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:18:07,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-26 14:18:07,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:18:07,771 INFO L87 Difference]: Start difference. First operand 29572 states. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:08,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:18:08,435 INFO L93 Difference]: Finished difference Result 29844 states and 66783 transitions. [2021-01-26 14:18:08,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-26 14:18:08,435 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-26 14:18:08,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:18:08,473 INFO L225 Difference]: With dead ends: 29844 [2021-01-26 14:18:08,473 INFO L226 Difference]: Without dead ends: 29692 [2021-01-26 14:18:08,474 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=240, Invalid=752, Unknown=0, NotChecked=0, Total=992 [2021-01-26 14:18:08,474 INFO L78 Accepts]: Start accepts. Automaton has 29692 states. Word has length 53 [2021-01-26 14:18:08,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:18:08,474 INFO L481 AbstractCegarLoop]: Abstraction has 29692 states. [2021-01-26 14:18:08,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:08,474 INFO L276 IsEmpty]: Start isEmpty. Operand 29692 states. [2021-01-26 14:18:08,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:18:08,493 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:18:08,493 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:18:08,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-01-26 14:18:08,694 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:18:08,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:18:08,695 INFO L82 PathProgramCache]: Analyzing trace with hash -270011115, now seen corresponding path program 33 times [2021-01-26 14:18:08,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:18:08,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967327996] [2021-01-26 14:18:08,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:18:08,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:08,841 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:08,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967327996] [2021-01-26 14:18:08,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676207132] [2021-01-26 14:18:08,842 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:18:08,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-26 14:18:08,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:18:08,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:18:08,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:18:09,261 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:09,269 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:09,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:18:09,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-26 14:18:09,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802911553] [2021-01-26 14:18:09,270 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-26 14:18:09,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:18:09,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-26 14:18:09,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:18:09,271 INFO L87 Difference]: Start difference. First operand 29692 states. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:09,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:18:09,989 INFO L93 Difference]: Finished difference Result 30004 states and 67103 transitions. [2021-01-26 14:18:09,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-26 14:18:09,990 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-26 14:18:09,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:18:10,024 INFO L225 Difference]: With dead ends: 30004 [2021-01-26 14:18:10,025 INFO L226 Difference]: Without dead ends: 29852 [2021-01-26 14:18:10,025 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2021-01-26 14:18:10,025 INFO L78 Accepts]: Start accepts. Automaton has 29852 states. Word has length 53 [2021-01-26 14:18:10,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:18:10,025 INFO L481 AbstractCegarLoop]: Abstraction has 29852 states. [2021-01-26 14:18:10,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:10,026 INFO L276 IsEmpty]: Start isEmpty. Operand 29852 states. [2021-01-26 14:18:10,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:18:10,041 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:18:10,041 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:18:10,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:18:10,244 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:18:10,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:18:10,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1452069749, now seen corresponding path program 34 times [2021-01-26 14:18:10,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:18:10,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121060021] [2021-01-26 14:18:10,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:18:10,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:10,364 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:10,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121060021] [2021-01-26 14:18:10,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855507586] [2021-01-26 14:18:10,365 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:18:10,414 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-26 14:18:10,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:18:10,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-26 14:18:10,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:18:10,575 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:10,583 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:10,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:18:10,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-26 14:18:10,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282346240] [2021-01-26 14:18:10,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-26 14:18:10,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:18:10,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-26 14:18:10,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:18:10,586 INFO L87 Difference]: Start difference. First operand 29852 states. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:11,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:18:11,371 INFO L93 Difference]: Finished difference Result 30444 states and 67983 transitions. [2021-01-26 14:18:11,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-26 14:18:11,371 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-26 14:18:11,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:18:11,409 INFO L225 Difference]: With dead ends: 30444 [2021-01-26 14:18:11,410 INFO L226 Difference]: Without dead ends: 30292 [2021-01-26 14:18:11,410 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=332, Invalid=1000, Unknown=0, NotChecked=0, Total=1332 [2021-01-26 14:18:11,410 INFO L78 Accepts]: Start accepts. Automaton has 30292 states. Word has length 53 [2021-01-26 14:18:11,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:18:11,410 INFO L481 AbstractCegarLoop]: Abstraction has 30292 states. [2021-01-26 14:18:11,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:11,411 INFO L276 IsEmpty]: Start isEmpty. Operand 30292 states. [2021-01-26 14:18:11,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-26 14:18:11,431 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:18:11,431 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:18:11,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:18:11,632 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:18:11,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:18:11,633 INFO L82 PathProgramCache]: Analyzing trace with hash -2086896775, now seen corresponding path program 35 times [2021-01-26 14:18:11,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:18:11,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772979069] [2021-01-26 14:18:11,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:18:11,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:11,959 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:11,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772979069] [2021-01-26 14:18:11,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811979260] [2021-01-26 14:18:11,959 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:18:12,011 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:18:12,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:18:12,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:18:12,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:18:12,144 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:18:12,158 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:12,166 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:12,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:18:12,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-26 14:18:12,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508448938] [2021-01-26 14:18:12,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-26 14:18:12,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:18:12,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-26 14:18:12,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-01-26 14:18:12,168 INFO L87 Difference]: Start difference. First operand 30292 states. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:13,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:18:13,378 INFO L93 Difference]: Finished difference Result 32166 states and 72096 transitions. [2021-01-26 14:18:13,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-26 14:18:13,378 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-26 14:18:13,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:18:13,415 INFO L225 Difference]: With dead ends: 32166 [2021-01-26 14:18:13,415 INFO L226 Difference]: Without dead ends: 31802 [2021-01-26 14:18:13,416 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=583, Invalid=1867, Unknown=0, NotChecked=0, Total=2450 [2021-01-26 14:18:13,416 INFO L78 Accepts]: Start accepts. Automaton has 31802 states. Word has length 53 [2021-01-26 14:18:13,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:18:13,416 INFO L481 AbstractCegarLoop]: Abstraction has 31802 states. [2021-01-26 14:18:13,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:13,416 INFO L276 IsEmpty]: Start isEmpty. Operand 31802 states. [2021-01-26 14:18:13,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:18:13,445 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:18:13,445 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:18:13,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-01-26 14:18:13,645 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:18:13,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:18:13,646 INFO L82 PathProgramCache]: Analyzing trace with hash -2038569245, now seen corresponding path program 3 times [2021-01-26 14:18:13,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:18:13,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222403138] [2021-01-26 14:18:13,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:18:13,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:13,745 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 43 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:13,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222403138] [2021-01-26 14:18:13,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803915176] [2021-01-26 14:18:13,746 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:18:13,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-26 14:18:13,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:18:13,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-26 14:18:13,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:18:13,875 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:13,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-26 14:18:13,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 15 [2021-01-26 14:18:13,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109959900] [2021-01-26 14:18:13,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-26 14:18:13,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:18:13,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-26 14:18:13,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-01-26 14:18:13,877 INFO L87 Difference]: Start difference. First operand 31802 states. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:14,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:18:14,372 INFO L93 Difference]: Finished difference Result 37747 states and 84962 transitions. [2021-01-26 14:18:14,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-26 14:18:14,373 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:18:14,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:18:14,414 INFO L225 Difference]: With dead ends: 37747 [2021-01-26 14:18:14,415 INFO L226 Difference]: Without dead ends: 37519 [2021-01-26 14:18:14,415 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=184, Invalid=416, Unknown=0, NotChecked=0, Total=600 [2021-01-26 14:18:14,415 INFO L78 Accepts]: Start accepts. Automaton has 37519 states. Word has length 58 [2021-01-26 14:18:14,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:18:14,415 INFO L481 AbstractCegarLoop]: Abstraction has 37519 states. [2021-01-26 14:18:14,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:14,415 INFO L276 IsEmpty]: Start isEmpty. Operand 37519 states. [2021-01-26 14:18:14,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:18:14,438 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:18:14,438 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:18:14,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:18:14,638 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:18:14,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:18:14,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1808185776, now seen corresponding path program 7 times [2021-01-26 14:18:14,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:18:14,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318030279] [2021-01-26 14:18:14,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:18:14,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:14,802 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:14,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318030279] [2021-01-26 14:18:14,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530276773] [2021-01-26 14:18:14,802 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:18:14,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:14,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:18:14,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:18:15,075 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:15,113 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:15,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:18:15,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:18:15,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798152346] [2021-01-26 14:18:15,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:18:15,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:18:15,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:18:15,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:18:15,115 INFO L87 Difference]: Start difference. First operand 37519 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:15,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:18:15,511 INFO L93 Difference]: Finished difference Result 37687 states and 84772 transitions. [2021-01-26 14:18:15,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-26 14:18:15,512 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:18:15,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:18:15,557 INFO L225 Difference]: With dead ends: 37687 [2021-01-26 14:18:15,557 INFO L226 Difference]: Without dead ends: 37554 [2021-01-26 14:18:15,557 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2021-01-26 14:18:15,557 INFO L78 Accepts]: Start accepts. Automaton has 37554 states. Word has length 58 [2021-01-26 14:18:15,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:18:15,558 INFO L481 AbstractCegarLoop]: Abstraction has 37554 states. [2021-01-26 14:18:15,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:15,558 INFO L276 IsEmpty]: Start isEmpty. Operand 37554 states. [2021-01-26 14:18:15,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:18:15,584 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:18:15,584 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:18:15,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-01-26 14:18:15,785 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:18:15,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:18:15,786 INFO L82 PathProgramCache]: Analyzing trace with hash 804219266, now seen corresponding path program 8 times [2021-01-26 14:18:15,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:18:15,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547542885] [2021-01-26 14:18:15,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:18:15,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:15,952 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:15,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547542885] [2021-01-26 14:18:15,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81695498] [2021-01-26 14:18:15,953 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:18:16,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:18:16,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:18:16,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-26 14:18:16,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:18:16,085 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:16,099 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:16,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:18:16,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-01-26 14:18:16,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928340573] [2021-01-26 14:18:16,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-26 14:18:16,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:18:16,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-26 14:18:16,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-01-26 14:18:16,100 INFO L87 Difference]: Start difference. First operand 37554 states. Second operand has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:16,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:18:16,937 INFO L93 Difference]: Finished difference Result 38405 states and 86630 transitions. [2021-01-26 14:18:16,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-26 14:18:16,938 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:18:16,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:18:16,984 INFO L225 Difference]: With dead ends: 38405 [2021-01-26 14:18:16,985 INFO L226 Difference]: Without dead ends: 37939 [2021-01-26 14:18:16,985 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=235, Invalid=821, Unknown=0, NotChecked=0, Total=1056 [2021-01-26 14:18:16,985 INFO L78 Accepts]: Start accepts. Automaton has 37939 states. Word has length 58 [2021-01-26 14:18:16,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:18:16,985 INFO L481 AbstractCegarLoop]: Abstraction has 37939 states. [2021-01-26 14:18:16,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:16,985 INFO L276 IsEmpty]: Start isEmpty. Operand 37939 states. [2021-01-26 14:18:17,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:18:17,016 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:18:17,016 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:18:17,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-01-26 14:18:17,217 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:18:17,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:18:17,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1992619272, now seen corresponding path program 36 times [2021-01-26 14:18:17,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:18:17,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639461768] [2021-01-26 14:18:17,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:18:17,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:17,385 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:17,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639461768] [2021-01-26 14:18:17,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247843610] [2021-01-26 14:18:17,386 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:18:17,449 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-26 14:18:17,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:18:17,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:18:17,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:18:17,703 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:17,718 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:17,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:18:17,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-01-26 14:18:17,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596802760] [2021-01-26 14:18:17,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-26 14:18:17,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:18:17,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-26 14:18:17,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-01-26 14:18:17,720 INFO L87 Difference]: Start difference. First operand 37939 states. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:18,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:18:18,594 INFO L93 Difference]: Finished difference Result 38382 states and 86460 transitions. [2021-01-26 14:18:18,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-26 14:18:18,595 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:18:18,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:18:18,638 INFO L225 Difference]: With dead ends: 38382 [2021-01-26 14:18:18,638 INFO L226 Difference]: Without dead ends: 38059 [2021-01-26 14:18:18,638 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=273, Invalid=917, Unknown=0, NotChecked=0, Total=1190 [2021-01-26 14:18:18,639 INFO L78 Accepts]: Start accepts. Automaton has 38059 states. Word has length 58 [2021-01-26 14:18:18,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:18:18,639 INFO L481 AbstractCegarLoop]: Abstraction has 38059 states. [2021-01-26 14:18:18,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:18,639 INFO L276 IsEmpty]: Start isEmpty. Operand 38059 states. [2021-01-26 14:18:18,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:18:18,664 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:18:18,664 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:18:18,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-01-26 14:18:18,865 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:18:18,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:18:18,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1033008748, now seen corresponding path program 37 times [2021-01-26 14:18:18,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:18:18,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586934077] [2021-01-26 14:18:18,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:18:18,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:19,028 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:19,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586934077] [2021-01-26 14:18:19,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992187174] [2021-01-26 14:18:19,029 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:18:19,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:19,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:18:19,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:18:19,819 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:19,829 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:19,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:18:19,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-01-26 14:18:19,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087338348] [2021-01-26 14:18:19,830 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-26 14:18:19,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:18:19,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-26 14:18:19,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-01-26 14:18:19,831 INFO L87 Difference]: Start difference. First operand 38059 states. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:20,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:18:20,925 INFO L93 Difference]: Finished difference Result 38502 states and 86700 transitions. [2021-01-26 14:18:20,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-26 14:18:20,925 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:18:20,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:18:20,973 INFO L225 Difference]: With dead ends: 38502 [2021-01-26 14:18:20,973 INFO L226 Difference]: Without dead ends: 38179 [2021-01-26 14:18:20,974 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=318, Invalid=1164, Unknown=0, NotChecked=0, Total=1482 [2021-01-26 14:18:20,974 INFO L78 Accepts]: Start accepts. Automaton has 38179 states. Word has length 58 [2021-01-26 14:18:20,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:18:20,974 INFO L481 AbstractCegarLoop]: Abstraction has 38179 states. [2021-01-26 14:18:20,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:20,974 INFO L276 IsEmpty]: Start isEmpty. Operand 38179 states. [2021-01-26 14:18:21,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:18:21,006 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:18:21,007 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:18:21,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-01-26 14:18:21,207 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:18:21,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:18:21,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1539877684, now seen corresponding path program 38 times [2021-01-26 14:18:21,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:18:21,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881212661] [2021-01-26 14:18:21,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:18:21,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:21,377 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:21,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881212661] [2021-01-26 14:18:21,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862052254] [2021-01-26 14:18:21,378 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:18:21,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:18:21,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:18:21,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:18:21,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:18:21,835 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:21,847 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:21,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:18:21,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-01-26 14:18:21,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409962171] [2021-01-26 14:18:21,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-26 14:18:21,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:18:21,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-26 14:18:21,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-01-26 14:18:21,848 INFO L87 Difference]: Start difference. First operand 38179 states. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:22,347 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2021-01-26 14:18:22,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:18:22,960 INFO L93 Difference]: Finished difference Result 38587 states and 86875 transitions. [2021-01-26 14:18:22,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-26 14:18:22,961 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:18:22,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:18:23,004 INFO L225 Difference]: With dead ends: 38587 [2021-01-26 14:18:23,004 INFO L226 Difference]: Without dead ends: 38264 [2021-01-26 14:18:23,004 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=396, Invalid=1326, Unknown=0, NotChecked=0, Total=1722 [2021-01-26 14:18:23,004 INFO L78 Accepts]: Start accepts. Automaton has 38264 states. Word has length 58 [2021-01-26 14:18:23,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:18:23,004 INFO L481 AbstractCegarLoop]: Abstraction has 38264 states. [2021-01-26 14:18:23,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:23,005 INFO L276 IsEmpty]: Start isEmpty. Operand 38264 states. [2021-01-26 14:18:23,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:18:23,030 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:18:23,030 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:18:23,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:18:23,231 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:18:23,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:18:23,232 INFO L82 PathProgramCache]: Analyzing trace with hash -783876912, now seen corresponding path program 39 times [2021-01-26 14:18:23,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:18:23,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31964142] [2021-01-26 14:18:23,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:18:23,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:23,477 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:23,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31964142] [2021-01-26 14:18:23,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806270132] [2021-01-26 14:18:23,478 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:18:23,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-26 14:18:23,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:18:23,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:18:23,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:18:23,780 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:18:23,865 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:23,899 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:23,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:18:23,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:18:23,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481923287] [2021-01-26 14:18:23,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:18:23,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:18:23,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:18:23,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:18:23,902 INFO L87 Difference]: Start difference. First operand 38264 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:25,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:18:25,899 INFO L93 Difference]: Finished difference Result 40474 states and 91375 transitions. [2021-01-26 14:18:25,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-01-26 14:18:25,900 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:18:25,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:18:25,968 INFO L225 Difference]: With dead ends: 40474 [2021-01-26 14:18:25,968 INFO L226 Difference]: Without dead ends: 39704 [2021-01-26 14:18:25,969 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 986 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=712, Invalid=2594, Unknown=0, NotChecked=0, Total=3306 [2021-01-26 14:18:25,969 INFO L78 Accepts]: Start accepts. Automaton has 39704 states. Word has length 58 [2021-01-26 14:18:25,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:18:25,969 INFO L481 AbstractCegarLoop]: Abstraction has 39704 states. [2021-01-26 14:18:25,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:25,970 INFO L276 IsEmpty]: Start isEmpty. Operand 39704 states. [2021-01-26 14:18:26,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:18:26,006 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:18:26,007 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:18:26,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:18:26,207 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:18:26,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:18:26,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1112097722, now seen corresponding path program 40 times [2021-01-26 14:18:26,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:18:26,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443348994] [2021-01-26 14:18:26,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:18:26,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:26,384 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 12 [2021-01-26 14:18:26,474 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:26,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443348994] [2021-01-26 14:18:26,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146538209] [2021-01-26 14:18:26,475 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:18:26,554 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-26 14:18:26,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:18:26,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-26 14:18:26,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:18:26,832 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:26,850 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:26,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:18:26,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-01-26 14:18:26,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828045690] [2021-01-26 14:18:26,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-26 14:18:26,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:18:26,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-26 14:18:26,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-01-26 14:18:26,853 INFO L87 Difference]: Start difference. First operand 39704 states. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:27,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:18:27,712 INFO L93 Difference]: Finished difference Result 40027 states and 90056 transitions. [2021-01-26 14:18:27,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-26 14:18:27,713 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:18:27,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:18:27,748 INFO L225 Difference]: With dead ends: 40027 [2021-01-26 14:18:27,748 INFO L226 Difference]: Without dead ends: 39799 [2021-01-26 14:18:27,749 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=298, Invalid=962, Unknown=0, NotChecked=0, Total=1260 [2021-01-26 14:18:27,749 INFO L78 Accepts]: Start accepts. Automaton has 39799 states. Word has length 58 [2021-01-26 14:18:27,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:18:27,749 INFO L481 AbstractCegarLoop]: Abstraction has 39799 states. [2021-01-26 14:18:27,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:27,749 INFO L276 IsEmpty]: Start isEmpty. Operand 39799 states. [2021-01-26 14:18:27,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:18:27,776 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:18:27,776 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:18:27,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:18:27,983 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:18:27,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:18:27,983 INFO L82 PathProgramCache]: Analyzing trace with hash 841175852, now seen corresponding path program 41 times [2021-01-26 14:18:27,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:18:27,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045763501] [2021-01-26 14:18:27,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:18:27,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:28,153 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:28,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045763501] [2021-01-26 14:18:28,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001313480] [2021-01-26 14:18:28,153 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:18:28,203 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-26 14:18:28,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:18:28,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:18:28,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:18:28,439 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:28,451 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:28,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:18:28,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-01-26 14:18:28,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791882838] [2021-01-26 14:18:28,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-26 14:18:28,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:18:28,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-26 14:18:28,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-01-26 14:18:28,453 INFO L87 Difference]: Start difference. First operand 39799 states. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:29,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:18:29,388 INFO L93 Difference]: Finished difference Result 40402 states and 90929 transitions. [2021-01-26 14:18:29,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-26 14:18:29,388 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:18:29,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:18:29,433 INFO L225 Difference]: With dead ends: 40402 [2021-01-26 14:18:29,433 INFO L226 Difference]: Without dead ends: 39984 [2021-01-26 14:18:29,434 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=317, Invalid=1015, Unknown=0, NotChecked=0, Total=1332 [2021-01-26 14:18:29,434 INFO L78 Accepts]: Start accepts. Automaton has 39984 states. Word has length 58 [2021-01-26 14:18:29,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:18:29,434 INFO L481 AbstractCegarLoop]: Abstraction has 39984 states. [2021-01-26 14:18:29,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:29,434 INFO L276 IsEmpty]: Start isEmpty. Operand 39984 states. [2021-01-26 14:18:29,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:18:29,459 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:18:29,459 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:18:29,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-01-26 14:18:29,660 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:18:29,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:18:29,661 INFO L82 PathProgramCache]: Analyzing trace with hash 147775686, now seen corresponding path program 42 times [2021-01-26 14:18:29,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:18:29,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505544170] [2021-01-26 14:18:29,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:18:29,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:29,825 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:29,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505544170] [2021-01-26 14:18:29,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578796014] [2021-01-26 14:18:29,825 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:18:29,881 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-26 14:18:29,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:18:29,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:18:29,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:18:30,152 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:30,161 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:30,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:18:30,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-01-26 14:18:30,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277525294] [2021-01-26 14:18:30,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-26 14:18:30,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:18:30,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-26 14:18:30,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-01-26 14:18:30,163 INFO L87 Difference]: Start difference. First operand 39984 states. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:31,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:18:31,235 INFO L93 Difference]: Finished difference Result 40272 states and 90551 transitions. [2021-01-26 14:18:31,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-26 14:18:31,236 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:18:31,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:18:31,281 INFO L225 Difference]: With dead ends: 40272 [2021-01-26 14:18:31,281 INFO L226 Difference]: Without dead ends: 40044 [2021-01-26 14:18:31,281 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=351, Invalid=1289, Unknown=0, NotChecked=0, Total=1640 [2021-01-26 14:18:31,281 INFO L78 Accepts]: Start accepts. Automaton has 40044 states. Word has length 58 [2021-01-26 14:18:31,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:18:31,281 INFO L481 AbstractCegarLoop]: Abstraction has 40044 states. [2021-01-26 14:18:31,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:31,282 INFO L276 IsEmpty]: Start isEmpty. Operand 40044 states. [2021-01-26 14:18:31,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:18:31,307 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:18:31,308 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:18:31,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:18:31,508 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:18:31,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:18:31,509 INFO L82 PathProgramCache]: Analyzing trace with hash -123146184, now seen corresponding path program 43 times [2021-01-26 14:18:31,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:18:31,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002539913] [2021-01-26 14:18:31,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:18:31,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:31,668 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:31,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002539913] [2021-01-26 14:18:31,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548009986] [2021-01-26 14:18:31,668 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:18:31,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:31,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:18:31,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:18:31,982 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:31,994 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:31,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:18:31,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-01-26 14:18:31,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669514815] [2021-01-26 14:18:31,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-26 14:18:31,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:18:31,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-26 14:18:31,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-01-26 14:18:31,996 INFO L87 Difference]: Start difference. First operand 40044 states. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:32,726 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 15 [2021-01-26 14:18:33,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:18:33,331 INFO L93 Difference]: Finished difference Result 40587 states and 91304 transitions. [2021-01-26 14:18:33,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-26 14:18:33,332 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:18:33,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:18:33,390 INFO L225 Difference]: With dead ends: 40587 [2021-01-26 14:18:33,390 INFO L226 Difference]: Without dead ends: 40169 [2021-01-26 14:18:33,391 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=400, Invalid=1406, Unknown=0, NotChecked=0, Total=1806 [2021-01-26 14:18:33,391 INFO L78 Accepts]: Start accepts. Automaton has 40169 states. Word has length 58 [2021-01-26 14:18:33,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:18:33,391 INFO L481 AbstractCegarLoop]: Abstraction has 40169 states. [2021-01-26 14:18:33,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:33,391 INFO L276 IsEmpty]: Start isEmpty. Operand 40169 states. [2021-01-26 14:18:33,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:18:33,418 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:18:33,418 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:18:33,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-01-26 14:18:33,619 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:18:33,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:18:33,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1604977050, now seen corresponding path program 44 times [2021-01-26 14:18:33,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:18:33,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209323680] [2021-01-26 14:18:33,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:18:33,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:33,767 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:33,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209323680] [2021-01-26 14:18:33,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286671177] [2021-01-26 14:18:33,767 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:18:33,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:18:33,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:18:33,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:18:33,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:18:34,120 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:34,133 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:34,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:18:34,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-01-26 14:18:34,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051452203] [2021-01-26 14:18:34,134 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-26 14:18:34,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:18:34,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-26 14:18:34,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-01-26 14:18:34,135 INFO L87 Difference]: Start difference. First operand 40169 states. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:35,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:18:35,560 INFO L93 Difference]: Finished difference Result 40457 states and 90926 transitions. [2021-01-26 14:18:35,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-26 14:18:35,561 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:18:35,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:18:35,612 INFO L225 Difference]: With dead ends: 40457 [2021-01-26 14:18:35,612 INFO L226 Difference]: Without dead ends: 40229 [2021-01-26 14:18:35,612 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=454, Invalid=1526, Unknown=0, NotChecked=0, Total=1980 [2021-01-26 14:18:35,612 INFO L78 Accepts]: Start accepts. Automaton has 40229 states. Word has length 58 [2021-01-26 14:18:35,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:18:35,613 INFO L481 AbstractCegarLoop]: Abstraction has 40229 states. [2021-01-26 14:18:35,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:35,613 INFO L276 IsEmpty]: Start isEmpty. Operand 40229 states. [2021-01-26 14:18:35,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:18:35,647 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:18:35,648 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:18:35,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:18:35,848 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:18:35,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:18:35,849 INFO L82 PathProgramCache]: Analyzing trace with hash 2038566546, now seen corresponding path program 45 times [2021-01-26 14:18:35,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:18:35,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581331625] [2021-01-26 14:18:35,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:18:35,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:36,030 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:36,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581331625] [2021-01-26 14:18:36,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606905961] [2021-01-26 14:18:36,031 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:18:36,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-26 14:18:36,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:18:36,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:18:36,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:18:36,356 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:36,370 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:36,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:18:36,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-01-26 14:18:36,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912044279] [2021-01-26 14:18:36,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-26 14:18:36,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:18:36,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-26 14:18:36,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-01-26 14:18:36,371 INFO L87 Difference]: Start difference. First operand 40229 states. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:37,027 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-01-26 14:18:37,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:18:37,660 INFO L93 Difference]: Finished difference Result 40552 states and 91111 transitions. [2021-01-26 14:18:37,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-26 14:18:37,661 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:18:37,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:18:37,705 INFO L225 Difference]: With dead ends: 40552 [2021-01-26 14:18:37,705 INFO L226 Difference]: Without dead ends: 40324 [2021-01-26 14:18:37,705 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=456, Invalid=1436, Unknown=0, NotChecked=0, Total=1892 [2021-01-26 14:18:37,705 INFO L78 Accepts]: Start accepts. Automaton has 40324 states. Word has length 58 [2021-01-26 14:18:37,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:18:37,705 INFO L481 AbstractCegarLoop]: Abstraction has 40324 states. [2021-01-26 14:18:37,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:37,706 INFO L276 IsEmpty]: Start isEmpty. Operand 40324 states. [2021-01-26 14:18:37,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:18:37,732 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:18:37,732 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:18:37,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-01-26 14:18:37,933 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:18:37,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:18:37,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1500399978, now seen corresponding path program 46 times [2021-01-26 14:18:37,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:18:37,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153521577] [2021-01-26 14:18:37,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:18:37,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:38,103 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:38,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153521577] [2021-01-26 14:18:38,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304832455] [2021-01-26 14:18:38,104 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:18:38,157 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-26 14:18:38,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:18:38,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-26 14:18:38,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:18:38,380 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:18:38,387 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:18:38,392 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:18:38,506 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:38,548 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:38,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:18:38,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:18:38,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353471405] [2021-01-26 14:18:38,549 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:18:38,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:18:38,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:18:38,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:18:38,550 INFO L87 Difference]: Start difference. First operand 40324 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:41,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:18:41,134 INFO L93 Difference]: Finished difference Result 42824 states and 96636 transitions. [2021-01-26 14:18:41,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-01-26 14:18:41,135 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:18:41,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:18:41,183 INFO L225 Difference]: With dead ends: 42824 [2021-01-26 14:18:41,183 INFO L226 Difference]: Without dead ends: 41874 [2021-01-26 14:18:41,184 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=823, Invalid=2959, Unknown=0, NotChecked=0, Total=3782 [2021-01-26 14:18:41,184 INFO L78 Accepts]: Start accepts. Automaton has 41874 states. Word has length 58 [2021-01-26 14:18:41,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:18:41,184 INFO L481 AbstractCegarLoop]: Abstraction has 41874 states. [2021-01-26 14:18:41,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:41,185 INFO L276 IsEmpty]: Start isEmpty. Operand 41874 states. [2021-01-26 14:18:41,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:18:41,211 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:18:41,212 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:18:41,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:18:41,414 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:18:41,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:18:41,414 INFO L82 PathProgramCache]: Analyzing trace with hash 507842304, now seen corresponding path program 47 times [2021-01-26 14:18:41,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:18:41,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087504361] [2021-01-26 14:18:41,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:18:41,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:41,596 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:41,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087504361] [2021-01-26 14:18:41,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564121374] [2021-01-26 14:18:41,597 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:18:41,660 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-26 14:18:41,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:18:41,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:18:41,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:18:41,917 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:42,087 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:42,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:18:42,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-01-26 14:18:42,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934793592] [2021-01-26 14:18:42,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-26 14:18:42,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:18:42,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-26 14:18:42,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-01-26 14:18:42,090 INFO L87 Difference]: Start difference. First operand 41874 states. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:43,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:18:43,525 INFO L93 Difference]: Finished difference Result 42417 states and 95379 transitions. [2021-01-26 14:18:43,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-01-26 14:18:43,525 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:18:43,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:18:43,572 INFO L225 Difference]: With dead ends: 42417 [2021-01-26 14:18:43,573 INFO L226 Difference]: Without dead ends: 41999 [2021-01-26 14:18:43,573 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=574, Invalid=1976, Unknown=0, NotChecked=0, Total=2550 [2021-01-26 14:18:43,573 INFO L78 Accepts]: Start accepts. Automaton has 41999 states. Word has length 58 [2021-01-26 14:18:43,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:18:43,573 INFO L481 AbstractCegarLoop]: Abstraction has 41999 states. [2021-01-26 14:18:43,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:43,574 INFO L276 IsEmpty]: Start isEmpty. Operand 41999 states. [2021-01-26 14:18:43,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:18:43,602 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:18:43,603 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:18:43,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-01-26 14:18:43,804 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:18:43,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:18:43,805 INFO L82 PathProgramCache]: Analyzing trace with hash -2065044128, now seen corresponding path program 48 times [2021-01-26 14:18:43,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:18:43,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200030254] [2021-01-26 14:18:43,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:18:43,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:43,975 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:43,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200030254] [2021-01-26 14:18:43,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798873925] [2021-01-26 14:18:43,976 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:18:44,040 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-26 14:18:44,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:18:44,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:18:44,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:18:44,499 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:44,514 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:44,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:18:44,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-01-26 14:18:44,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388545448] [2021-01-26 14:18:44,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-26 14:18:44,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:18:44,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-26 14:18:44,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2021-01-26 14:18:44,516 INFO L87 Difference]: Start difference. First operand 41999 states. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:46,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:18:46,179 INFO L93 Difference]: Finished difference Result 42542 states and 95634 transitions. [2021-01-26 14:18:46,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-26 14:18:46,179 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:18:46,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:18:46,233 INFO L225 Difference]: With dead ends: 42542 [2021-01-26 14:18:46,233 INFO L226 Difference]: Without dead ends: 42124 [2021-01-26 14:18:46,233 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=535, Invalid=1721, Unknown=0, NotChecked=0, Total=2256 [2021-01-26 14:18:46,234 INFO L78 Accepts]: Start accepts. Automaton has 42124 states. Word has length 58 [2021-01-26 14:18:46,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:18:46,234 INFO L481 AbstractCegarLoop]: Abstraction has 42124 states. [2021-01-26 14:18:46,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:46,234 INFO L276 IsEmpty]: Start isEmpty. Operand 42124 states. [2021-01-26 14:18:46,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:18:46,269 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:18:46,269 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:18:46,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-01-26 14:18:46,477 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:18:46,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:18:46,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1309043356, now seen corresponding path program 49 times [2021-01-26 14:18:46,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:18:46,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237947078] [2021-01-26 14:18:46,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:18:46,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:46,656 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2021-01-26 14:18:46,784 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:46,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237947078] [2021-01-26 14:18:46,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787598986] [2021-01-26 14:18:46,785 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:18:46,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:18:46,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:18:46,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:18:47,126 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:18:47,148 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:18:47,169 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:18:49,425 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:18:49,512 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:18:49,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:18:49,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:18:49,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874455590] [2021-01-26 14:18:49,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:18:49,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:18:49,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:18:49,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=322, Unknown=1, NotChecked=0, Total=420 [2021-01-26 14:18:49,513 INFO L87 Difference]: Start difference. First operand 42124 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:18:49,837 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 16 [2021-01-26 14:18:50,772 WARN L193 SmtUtils]: Spent 562.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 22 [2021-01-26 14:18:50,994 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 18 [2021-01-26 14:18:57,761 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 65 DAG size of output: 47 [2021-01-26 14:19:04,573 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2021-01-26 14:19:07,498 WARN L193 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 40 [2021-01-26 14:19:13,993 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2021-01-26 14:19:14,297 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 21 [2021-01-26 14:19:17,416 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2021-01-26 14:19:29,852 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 42 [2021-01-26 14:19:35,245 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-01-26 14:20:00,790 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2021-01-26 14:21:17,201 WARN L193 SmtUtils]: Spent 686.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 25 [2021-01-26 14:21:38,031 WARN L193 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-01-26 14:21:56,202 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 34 [2021-01-26 14:21:58,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:21:58,463 INFO L93 Difference]: Finished difference Result 45379 states and 102345 transitions. [2021-01-26 14:21:58,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-01-26 14:21:58,467 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:21:58,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:21:58,523 INFO L225 Difference]: With dead ends: 45379 [2021-01-26 14:21:58,523 INFO L226 Difference]: Without dead ends: 44379 [2021-01-26 14:21:58,524 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1379 ImplicationChecksByTransitivity, 82.0s TimeCoverageRelationStatistics Valid=872, Invalid=3144, Unknown=16, NotChecked=0, Total=4032 [2021-01-26 14:21:58,524 INFO L78 Accepts]: Start accepts. Automaton has 44379 states. Word has length 58 [2021-01-26 14:21:58,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:21:58,524 INFO L481 AbstractCegarLoop]: Abstraction has 44379 states. [2021-01-26 14:21:58,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:21:58,524 INFO L276 IsEmpty]: Start isEmpty. Operand 44379 states. [2021-01-26 14:21:58,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:21:58,556 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:21:58,556 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:21:58,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:21:58,757 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:21:58,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:21:58,758 INFO L82 PathProgramCache]: Analyzing trace with hash -597019592, now seen corresponding path program 50 times [2021-01-26 14:21:58,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:21:58,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519377504] [2021-01-26 14:21:58,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:21:58,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:21:59,207 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:21:59,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519377504] [2021-01-26 14:21:59,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805701980] [2021-01-26 14:21:59,208 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:21:59,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:21:59,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:21:59,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:21:59,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:21:59,867 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:21:59,880 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:21:59,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:21:59,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-01-26 14:21:59,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372011263] [2021-01-26 14:21:59,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-26 14:21:59,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:21:59,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-26 14:21:59,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-01-26 14:21:59,882 INFO L87 Difference]: Start difference. First operand 44379 states. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:22:02,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:22:02,349 INFO L93 Difference]: Finished difference Result 44942 states and 100949 transitions. [2021-01-26 14:22:02,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-26 14:22:02,353 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:22:02,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:22:02,403 INFO L225 Difference]: With dead ends: 44942 [2021-01-26 14:22:02,403 INFO L226 Difference]: Without dead ends: 44524 [2021-01-26 14:22:02,404 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=361, Invalid=1121, Unknown=0, NotChecked=0, Total=1482 [2021-01-26 14:22:02,404 INFO L78 Accepts]: Start accepts. Automaton has 44524 states. Word has length 58 [2021-01-26 14:22:02,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:22:02,404 INFO L481 AbstractCegarLoop]: Abstraction has 44524 states. [2021-01-26 14:22:02,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:22:02,404 INFO L276 IsEmpty]: Start isEmpty. Operand 44524 states. [2021-01-26 14:22:02,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:22:02,430 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:22:02,430 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:22:02,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:22:02,631 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:22:02,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:22:02,632 INFO L82 PathProgramCache]: Analyzing trace with hash -867941462, now seen corresponding path program 51 times [2021-01-26 14:22:02,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:22:02,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123686994] [2021-01-26 14:22:02,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:22:02,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:22:03,085 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:22:03,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123686994] [2021-01-26 14:22:03,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053693131] [2021-01-26 14:22:03,086 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:22:03,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-26 14:22:03,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:22:03,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:22:03,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:22:03,744 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:22:03,754 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:22:03,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:22:03,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-01-26 14:22:03,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454321067] [2021-01-26 14:22:03,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-26 14:22:03,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:22:03,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-26 14:22:03,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-01-26 14:22:03,755 INFO L87 Difference]: Start difference. First operand 44524 states. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:22:06,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:22:06,433 INFO L93 Difference]: Finished difference Result 46029 states and 103266 transitions. [2021-01-26 14:22:06,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-26 14:22:06,437 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:22:06,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:22:06,704 INFO L225 Difference]: With dead ends: 46029 [2021-01-26 14:22:06,704 INFO L226 Difference]: Without dead ends: 45364 [2021-01-26 14:22:06,706 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=425, Invalid=1381, Unknown=0, NotChecked=0, Total=1806 [2021-01-26 14:22:06,706 INFO L78 Accepts]: Start accepts. Automaton has 45364 states. Word has length 58 [2021-01-26 14:22:06,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:22:06,706 INFO L481 AbstractCegarLoop]: Abstraction has 45364 states. [2021-01-26 14:22:06,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:22:06,706 INFO L276 IsEmpty]: Start isEmpty. Operand 45364 states. [2021-01-26 14:22:06,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:22:06,741 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:22:06,743 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:22:06,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-01-26 14:22:06,958 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:22:06,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:22:06,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1582882476, now seen corresponding path program 52 times [2021-01-26 14:22:06,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:22:06,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438223727] [2021-01-26 14:22:06,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:22:06,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:22:07,392 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:22:07,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438223727] [2021-01-26 14:22:07,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912663183] [2021-01-26 14:22:07,393 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:22:07,447 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-26 14:22:07,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:22:07,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-26 14:22:07,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:22:08,060 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:22:08,070 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:22:08,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:22:08,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-01-26 14:22:08,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036380128] [2021-01-26 14:22:08,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-26 14:22:08,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:22:08,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-26 14:22:08,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-01-26 14:22:08,074 INFO L87 Difference]: Start difference. First operand 45364 states. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:22:10,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:22:10,886 INFO L93 Difference]: Finished difference Result 46182 states and 103469 transitions. [2021-01-26 14:22:10,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-26 14:22:10,891 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:22:10,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:22:10,950 INFO L225 Difference]: With dead ends: 46182 [2021-01-26 14:22:10,950 INFO L226 Difference]: Without dead ends: 45764 [2021-01-26 14:22:10,950 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=421, Invalid=1471, Unknown=0, NotChecked=0, Total=1892 [2021-01-26 14:22:10,950 INFO L78 Accepts]: Start accepts. Automaton has 45764 states. Word has length 58 [2021-01-26 14:22:10,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:22:10,950 INFO L481 AbstractCegarLoop]: Abstraction has 45764 states. [2021-01-26 14:22:10,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:22:10,951 INFO L276 IsEmpty]: Start isEmpty. Operand 45764 states. [2021-01-26 14:22:11,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:22:11,125 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:22:11,125 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:22:11,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:22:11,325 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:22:11,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:22:11,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1311960606, now seen corresponding path program 53 times [2021-01-26 14:22:11,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:22:11,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369203003] [2021-01-26 14:22:11,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:22:11,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:22:11,756 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:22:11,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369203003] [2021-01-26 14:22:11,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744435790] [2021-01-26 14:22:11,756 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:22:11,812 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-26 14:22:11,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:22:11,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:22:11,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:22:12,435 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:22:12,444 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:22:12,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:22:12,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-01-26 14:22:12,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355395268] [2021-01-26 14:22:12,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-26 14:22:12,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:22:12,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-26 14:22:12,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-01-26 14:22:12,446 INFO L87 Difference]: Start difference. First operand 45764 states. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:22:15,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:22:15,535 INFO L93 Difference]: Finished difference Result 46812 states and 104823 transitions. [2021-01-26 14:22:15,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-26 14:22:15,540 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:22:15,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:22:15,596 INFO L225 Difference]: With dead ends: 46812 [2021-01-26 14:22:15,596 INFO L226 Difference]: Without dead ends: 46299 [2021-01-26 14:22:15,596 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 581 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=476, Invalid=1594, Unknown=0, NotChecked=0, Total=2070 [2021-01-26 14:22:15,596 INFO L78 Accepts]: Start accepts. Automaton has 46299 states. Word has length 58 [2021-01-26 14:22:15,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:22:15,597 INFO L481 AbstractCegarLoop]: Abstraction has 46299 states. [2021-01-26 14:22:15,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:22:15,597 INFO L276 IsEmpty]: Start isEmpty. Operand 46299 states. [2021-01-26 14:22:15,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:22:15,627 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:22:15,627 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:22:15,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-01-26 14:22:15,828 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:22:15,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:22:15,828 INFO L82 PathProgramCache]: Analyzing trace with hash -255638260, now seen corresponding path program 54 times [2021-01-26 14:22:15,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:22:15,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268672002] [2021-01-26 14:22:15,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:22:15,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:22:16,385 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:22:16,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268672002] [2021-01-26 14:22:16,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774151451] [2021-01-26 14:22:16,385 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:22:16,443 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-26 14:22:16,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:22:16,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-26 14:22:16,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:22:16,983 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:22:16,993 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:22:16,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:22:16,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-01-26 14:22:16,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062552150] [2021-01-26 14:22:16,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-26 14:22:16,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:22:16,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-26 14:22:16,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-01-26 14:22:16,994 INFO L87 Difference]: Start difference. First operand 46299 states. Second operand has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:22:20,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:22:20,204 INFO L93 Difference]: Finished difference Result 47182 states and 105529 transitions. [2021-01-26 14:22:20,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-01-26 14:22:20,208 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:22:20,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:22:20,264 INFO L225 Difference]: With dead ends: 47182 [2021-01-26 14:22:20,264 INFO L226 Difference]: Without dead ends: 46764 [2021-01-26 14:22:20,264 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=456, Invalid=1614, Unknown=0, NotChecked=0, Total=2070 [2021-01-26 14:22:20,264 INFO L78 Accepts]: Start accepts. Automaton has 46764 states. Word has length 58 [2021-01-26 14:22:20,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:22:20,265 INFO L481 AbstractCegarLoop]: Abstraction has 46764 states. [2021-01-26 14:22:20,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:22:20,265 INFO L276 IsEmpty]: Start isEmpty. Operand 46764 states. [2021-01-26 14:22:20,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:22:20,295 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:22:20,295 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:22:20,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:22:20,496 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:22:20,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:22:20,497 INFO L82 PathProgramCache]: Analyzing trace with hash -526560130, now seen corresponding path program 55 times [2021-01-26 14:22:20,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:22:20,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110529965] [2021-01-26 14:22:20,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:22:20,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:22:21,064 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:22:21,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110529965] [2021-01-26 14:22:21,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492037688] [2021-01-26 14:22:21,064 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:22:21,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:22:21,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:22:21,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:22:21,732 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:22:21,741 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:22:21,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:22:21,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-01-26 14:22:21,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236860315] [2021-01-26 14:22:21,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-26 14:22:21,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:22:21,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-26 14:22:21,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-01-26 14:22:21,743 INFO L87 Difference]: Start difference. First operand 46764 states. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:22:25,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:22:25,066 INFO L93 Difference]: Finished difference Result 47689 states and 106686 transitions. [2021-01-26 14:22:25,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-01-26 14:22:25,070 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:22:25,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:22:25,126 INFO L225 Difference]: With dead ends: 47689 [2021-01-26 14:22:25,127 INFO L226 Difference]: Without dead ends: 47024 [2021-01-26 14:22:25,127 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=503, Invalid=1849, Unknown=0, NotChecked=0, Total=2352 [2021-01-26 14:22:25,127 INFO L78 Accepts]: Start accepts. Automaton has 47024 states. Word has length 58 [2021-01-26 14:22:25,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:22:25,127 INFO L481 AbstractCegarLoop]: Abstraction has 47024 states. [2021-01-26 14:22:25,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:22:25,127 INFO L276 IsEmpty]: Start isEmpty. Operand 47024 states. [2021-01-26 14:22:25,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:22:25,156 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:22:25,156 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:22:25,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-01-26 14:22:25,357 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:22:25,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:22:25,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1950977952, now seen corresponding path program 56 times [2021-01-26 14:22:25,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:22:25,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965364954] [2021-01-26 14:22:25,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:22:25,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:22:25,797 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:22:25,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965364954] [2021-01-26 14:22:25,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394626570] [2021-01-26 14:22:25,798 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:22:25,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:22:25,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:22:25,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:22:25,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:22:26,595 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:22:26,604 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:22:26,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:22:26,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-01-26 14:22:26,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448203447] [2021-01-26 14:22:26,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-26 14:22:26,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:22:26,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-26 14:22:26,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-01-26 14:22:26,606 INFO L87 Difference]: Start difference. First operand 47024 states. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:22:30,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:22:30,020 INFO L93 Difference]: Finished difference Result 47552 states and 106299 transitions. [2021-01-26 14:22:30,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-26 14:22:30,025 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:22:30,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:22:30,088 INFO L225 Difference]: With dead ends: 47552 [2021-01-26 14:22:30,088 INFO L226 Difference]: Without dead ends: 47134 [2021-01-26 14:22:30,088 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 708 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=566, Invalid=1884, Unknown=0, NotChecked=0, Total=2450 [2021-01-26 14:22:30,088 INFO L78 Accepts]: Start accepts. Automaton has 47134 states. Word has length 58 [2021-01-26 14:22:30,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:22:30,089 INFO L481 AbstractCegarLoop]: Abstraction has 47134 states. [2021-01-26 14:22:30,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:22:30,089 INFO L276 IsEmpty]: Start isEmpty. Operand 47134 states. [2021-01-26 14:22:30,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:22:30,120 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:22:30,120 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:22:30,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:22:30,321 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:22:30,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:22:30,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1692565644, now seen corresponding path program 57 times [2021-01-26 14:22:30,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:22:30,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529738691] [2021-01-26 14:22:30,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:22:30,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:22:30,824 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:22:30,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529738691] [2021-01-26 14:22:30,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337168089] [2021-01-26 14:22:30,825 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:22:30,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-26 14:22:30,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:22:30,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:22:30,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:22:31,528 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:22:31,537 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:22:31,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:22:31,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-01-26 14:22:31,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57994304] [2021-01-26 14:22:31,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-26 14:22:31,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:22:31,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-26 14:22:31,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-01-26 14:22:31,538 INFO L87 Difference]: Start difference. First operand 47134 states. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:22:32,259 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 16 [2021-01-26 14:22:35,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:22:35,246 INFO L93 Difference]: Finished difference Result 47812 states and 106859 transitions. [2021-01-26 14:22:35,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-01-26 14:22:35,251 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:22:35,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:22:35,305 INFO L225 Difference]: With dead ends: 47812 [2021-01-26 14:22:35,306 INFO L226 Difference]: Without dead ends: 47394 [2021-01-26 14:22:35,306 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=618, Invalid=1932, Unknown=0, NotChecked=0, Total=2550 [2021-01-26 14:22:35,306 INFO L78 Accepts]: Start accepts. Automaton has 47394 states. Word has length 58 [2021-01-26 14:22:35,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:22:35,306 INFO L481 AbstractCegarLoop]: Abstraction has 47394 states. [2021-01-26 14:22:35,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:22:35,306 INFO L276 IsEmpty]: Start isEmpty. Operand 47394 states. [2021-01-26 14:22:35,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:22:35,335 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:22:35,335 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:22:35,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-01-26 14:22:35,536 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:22:35,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:22:35,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1846400880, now seen corresponding path program 58 times [2021-01-26 14:22:35,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:22:35,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496218868] [2021-01-26 14:22:35,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:22:35,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:22:36,131 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:22:36,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496218868] [2021-01-26 14:22:36,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192599859] [2021-01-26 14:22:36,131 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:22:36,185 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-26 14:22:36,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:22:36,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-26 14:22:36,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:22:36,745 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:22:36,897 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:22:36,985 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:22:36,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:22:36,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:22:36,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37610173] [2021-01-26 14:22:36,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:22:36,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:22:36,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:22:36,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:22:36,986 INFO L87 Difference]: Start difference. First operand 47394 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:22:42,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:22:42,943 INFO L93 Difference]: Finished difference Result 50511 states and 113418 transitions. [2021-01-26 14:22:42,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-01-26 14:22:42,948 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:22:42,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:22:43,011 INFO L225 Difference]: With dead ends: 50511 [2021-01-26 14:22:43,011 INFO L226 Difference]: Without dead ends: 49194 [2021-01-26 14:22:43,011 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1349 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=887, Invalid=3273, Unknown=0, NotChecked=0, Total=4160 [2021-01-26 14:22:43,012 INFO L78 Accepts]: Start accepts. Automaton has 49194 states. Word has length 58 [2021-01-26 14:22:43,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:22:43,012 INFO L481 AbstractCegarLoop]: Abstraction has 49194 states. [2021-01-26 14:22:43,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:22:43,012 INFO L276 IsEmpty]: Start isEmpty. Operand 49194 states. [2021-01-26 14:22:43,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:22:43,041 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:22:43,041 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:22:43,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:22:43,246 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:22:43,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:22:43,246 INFO L82 PathProgramCache]: Analyzing trace with hash 161841402, now seen corresponding path program 59 times [2021-01-26 14:22:43,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:22:43,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617595131] [2021-01-26 14:22:43,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:22:43,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:22:43,721 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:22:43,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617595131] [2021-01-26 14:22:43,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312584009] [2021-01-26 14:22:43,722 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:22:43,772 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-26 14:22:43,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:22:43,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:22:43,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:22:44,401 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:22:44,410 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:22:44,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:22:44,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-01-26 14:22:44,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997450218] [2021-01-26 14:22:44,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-26 14:22:44,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:22:44,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-26 14:22:44,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-01-26 14:22:44,412 INFO L87 Difference]: Start difference. First operand 49194 states. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:22:48,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:22:48,637 INFO L93 Difference]: Finished difference Result 50117 states and 111993 transitions. [2021-01-26 14:22:48,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-01-26 14:22:48,642 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:22:48,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:22:48,705 INFO L225 Difference]: With dead ends: 50117 [2021-01-26 14:22:48,706 INFO L226 Difference]: Without dead ends: 49604 [2021-01-26 14:22:48,706 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=681, Invalid=2289, Unknown=0, NotChecked=0, Total=2970 [2021-01-26 14:22:48,706 INFO L78 Accepts]: Start accepts. Automaton has 49604 states. Word has length 58 [2021-01-26 14:22:48,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:22:48,706 INFO L481 AbstractCegarLoop]: Abstraction has 49604 states. [2021-01-26 14:22:48,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:22:48,706 INFO L276 IsEmpty]: Start isEmpty. Operand 49604 states. [2021-01-26 14:22:48,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:22:48,736 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:22:48,736 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:22:48,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:22:48,937 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:22:48,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:22:48,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1883922266, now seen corresponding path program 60 times [2021-01-26 14:22:48,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:22:48,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145233460] [2021-01-26 14:22:48,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:22:48,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:22:49,378 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:22:49,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145233460] [2021-01-26 14:22:49,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364405251] [2021-01-26 14:22:49,378 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:22:49,433 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-26 14:22:49,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:22:49,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:22:49,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:22:50,010 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:22:50,019 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:22:50,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:22:50,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-01-26 14:22:50,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666672537] [2021-01-26 14:22:50,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-26 14:22:50,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:22:50,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-26 14:22:50,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2021-01-26 14:22:50,021 INFO L87 Difference]: Start difference. First operand 49604 states. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:22:55,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:22:55,121 INFO L93 Difference]: Finished difference Result 51334 states and 114576 transitions. [2021-01-26 14:22:55,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-01-26 14:22:55,125 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:22:55,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:22:55,193 INFO L225 Difference]: With dead ends: 51334 [2021-01-26 14:22:55,193 INFO L226 Difference]: Without dead ends: 50669 [2021-01-26 14:22:55,194 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1171 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=829, Invalid=2831, Unknown=0, NotChecked=0, Total=3660 [2021-01-26 14:22:55,194 INFO L78 Accepts]: Start accepts. Automaton has 50669 states. Word has length 58 [2021-01-26 14:22:55,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:22:55,194 INFO L481 AbstractCegarLoop]: Abstraction has 50669 states. [2021-01-26 14:22:55,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:22:55,194 INFO L276 IsEmpty]: Start isEmpty. Operand 50669 states. [2021-01-26 14:22:55,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:22:55,224 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:22:55,224 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:22:55,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:22:55,425 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:22:55,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:22:55,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1655044258, now seen corresponding path program 61 times [2021-01-26 14:22:55,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:22:55,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333727605] [2021-01-26 14:22:55,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:22:55,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:22:55,969 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:22:55,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333727605] [2021-01-26 14:22:55,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483468362] [2021-01-26 14:22:55,970 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:22:56,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:22:56,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:22:56,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:22:56,532 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:22:56,604 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:22:56,613 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:22:56,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:22:56,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:22:56,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623213532] [2021-01-26 14:22:56,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:22:56,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:22:56,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:22:56,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:22:56,614 INFO L87 Difference]: Start difference. First operand 50669 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:23:03,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:23:03,240 INFO L93 Difference]: Finished difference Result 55874 states and 125407 transitions. [2021-01-26 14:23:03,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-01-26 14:23:03,244 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:23:03,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:23:03,315 INFO L225 Difference]: With dead ends: 55874 [2021-01-26 14:23:03,315 INFO L226 Difference]: Without dead ends: 54484 [2021-01-26 14:23:03,316 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2040 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=1224, Invalid=4628, Unknown=0, NotChecked=0, Total=5852 [2021-01-26 14:23:03,316 INFO L78 Accepts]: Start accepts. Automaton has 54484 states. Word has length 58 [2021-01-26 14:23:03,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:23:03,316 INFO L481 AbstractCegarLoop]: Abstraction has 54484 states. [2021-01-26 14:23:03,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:23:03,316 INFO L276 IsEmpty]: Start isEmpty. Operand 54484 states. [2021-01-26 14:23:03,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:23:03,347 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:23:03,347 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:23:03,548 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:23:03,548 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:23:03,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:23:03,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1791249794, now seen corresponding path program 62 times [2021-01-26 14:23:03,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:23:03,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442411645] [2021-01-26 14:23:03,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:23:03,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:23:03,993 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:23:03,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442411645] [2021-01-26 14:23:03,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903851879] [2021-01-26 14:23:03,994 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:23:04,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:23:04,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:23:04,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:23:04,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:23:04,766 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:23:04,776 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:23:04,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:23:04,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-01-26 14:23:04,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537897331] [2021-01-26 14:23:04,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-26 14:23:04,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:23:04,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-26 14:23:04,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2021-01-26 14:23:04,777 INFO L87 Difference]: Start difference. First operand 54484 states. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:23:09,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:23:09,784 INFO L93 Difference]: Finished difference Result 56317 states and 125539 transitions. [2021-01-26 14:23:09,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-01-26 14:23:09,788 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:23:09,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:23:09,858 INFO L225 Difference]: With dead ends: 56317 [2021-01-26 14:23:09,859 INFO L226 Difference]: Without dead ends: 55899 [2021-01-26 14:23:09,859 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 959 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=746, Invalid=2334, Unknown=0, NotChecked=0, Total=3080 [2021-01-26 14:23:09,859 INFO L78 Accepts]: Start accepts. Automaton has 55899 states. Word has length 58 [2021-01-26 14:23:09,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:23:09,859 INFO L481 AbstractCegarLoop]: Abstraction has 55899 states. [2021-01-26 14:23:09,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:23:09,859 INFO L276 IsEmpty]: Start isEmpty. Operand 55899 states. [2021-01-26 14:23:09,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:23:09,891 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:23:09,891 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:23:10,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:23:10,092 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:23:10,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:23:10,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1035249022, now seen corresponding path program 63 times [2021-01-26 14:23:10,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:23:10,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097212640] [2021-01-26 14:23:10,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:23:10,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:23:10,601 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:23:10,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097212640] [2021-01-26 14:23:10,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589704679] [2021-01-26 14:23:10,601 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:23:10,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-26 14:23:10,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:23:10,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:23:10,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:23:11,292 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:23:11,299 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:23:11,304 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:23:11,448 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2021-01-26 14:23:11,558 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-01-26 14:23:11,722 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:23:11,800 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:23:11,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:23:11,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:23:11,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686297165] [2021-01-26 14:23:11,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:23:11,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:23:11,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:23:11,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:23:11,801 INFO L87 Difference]: Start difference. First operand 55899 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:23:13,255 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 22 [2021-01-26 14:23:13,647 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 22 [2021-01-26 14:23:15,041 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 24 [2021-01-26 14:23:17,505 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 22 [2021-01-26 14:23:17,773 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 27 [2021-01-26 14:23:18,239 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 18 [2021-01-26 14:23:20,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:23:20,872 INFO L93 Difference]: Finished difference Result 59509 states and 133273 transitions. [2021-01-26 14:23:20,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-01-26 14:23:20,877 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:23:20,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:23:20,951 INFO L225 Difference]: With dead ends: 59509 [2021-01-26 14:23:20,952 INFO L226 Difference]: Without dead ends: 58494 [2021-01-26 14:23:20,952 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1845 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=1196, Invalid=4206, Unknown=0, NotChecked=0, Total=5402 [2021-01-26 14:23:20,952 INFO L78 Accepts]: Start accepts. Automaton has 58494 states. Word has length 58 [2021-01-26 14:23:20,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:23:20,953 INFO L481 AbstractCegarLoop]: Abstraction has 58494 states. [2021-01-26 14:23:20,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:23:20,953 INFO L276 IsEmpty]: Start isEmpty. Operand 58494 states. [2021-01-26 14:23:20,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:23:20,985 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:23:20,985 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:23:21,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:23:21,185 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:23:21,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:23:21,186 INFO L82 PathProgramCache]: Analyzing trace with hash -313056756, now seen corresponding path program 64 times [2021-01-26 14:23:21,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:23:21,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886166743] [2021-01-26 14:23:21,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:23:21,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:23:21,773 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:23:21,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886166743] [2021-01-26 14:23:21,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598713782] [2021-01-26 14:23:21,774 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:23:21,831 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-26 14:23:21,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:23:21,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-26 14:23:21,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:23:22,370 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:23:22,479 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:23:22,565 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:23:22,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:23:22,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:23:22,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419380721] [2021-01-26 14:23:22,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:23:22,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:23:22,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:23:22,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:23:22,567 INFO L87 Difference]: Start difference. First operand 58494 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:23:23,779 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2021-01-26 14:23:30,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:23:30,167 INFO L93 Difference]: Finished difference Result 63030 states and 141595 transitions. [2021-01-26 14:23:30,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-01-26 14:23:30,171 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:23:30,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:23:30,252 INFO L225 Difference]: With dead ends: 63030 [2021-01-26 14:23:30,252 INFO L226 Difference]: Without dead ends: 61534 [2021-01-26 14:23:30,253 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1760 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=1140, Invalid=4262, Unknown=0, NotChecked=0, Total=5402 [2021-01-26 14:23:30,253 INFO L78 Accepts]: Start accepts. Automaton has 61534 states. Word has length 58 [2021-01-26 14:23:30,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:23:30,253 INFO L481 AbstractCegarLoop]: Abstraction has 61534 states. [2021-01-26 14:23:30,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:23:30,253 INFO L276 IsEmpty]: Start isEmpty. Operand 61534 states. [2021-01-26 14:23:30,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:23:30,286 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:23:30,287 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:23:30,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:23:30,487 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:23:30,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:23:30,488 INFO L82 PathProgramCache]: Analyzing trace with hash 828546426, now seen corresponding path program 65 times [2021-01-26 14:23:30,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:23:30,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589159325] [2021-01-26 14:23:30,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:23:30,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:23:30,948 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:23:30,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589159325] [2021-01-26 14:23:30,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758145207] [2021-01-26 14:23:30,949 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:23:31,003 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-26 14:23:31,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:23:31,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:23:31,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:23:31,643 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:23:31,655 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:23:31,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:23:31,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-01-26 14:23:31,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469591643] [2021-01-26 14:23:31,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-26 14:23:31,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:23:31,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-26 14:23:31,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2021-01-26 14:23:31,656 INFO L87 Difference]: Start difference. First operand 61534 states. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:23:33,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:23:33,990 INFO L93 Difference]: Finished difference Result 62972 states and 140618 transitions. [2021-01-26 14:23:33,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-26 14:23:33,995 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:23:33,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:23:34,076 INFO L225 Difference]: With dead ends: 62972 [2021-01-26 14:23:34,076 INFO L226 Difference]: Without dead ends: 62459 [2021-01-26 14:23:34,076 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=322, Invalid=938, Unknown=0, NotChecked=0, Total=1260 [2021-01-26 14:23:34,076 INFO L78 Accepts]: Start accepts. Automaton has 62459 states. Word has length 58 [2021-01-26 14:23:34,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:23:34,076 INFO L481 AbstractCegarLoop]: Abstraction has 62459 states. [2021-01-26 14:23:34,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:23:34,077 INFO L276 IsEmpty]: Start isEmpty. Operand 62459 states. [2021-01-26 14:23:34,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:23:34,107 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:23:34,107 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:23:34,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-01-26 14:23:34,308 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:23:34,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:23:34,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1845470330, now seen corresponding path program 66 times [2021-01-26 14:23:34,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:23:34,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873274480] [2021-01-26 14:23:34,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:23:34,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:23:34,727 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:23:34,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873274480] [2021-01-26 14:23:34,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005956550] [2021-01-26 14:23:34,728 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:23:34,784 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-26 14:23:34,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:23:34,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:23:34,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:23:35,491 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:23:35,502 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:23:35,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:23:35,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-01-26 14:23:35,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689350166] [2021-01-26 14:23:35,503 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-26 14:23:35,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:23:35,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-26 14:23:35,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-01-26 14:23:35,503 INFO L87 Difference]: Start difference. First operand 62459 states. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:23:37,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:23:37,938 INFO L93 Difference]: Finished difference Result 63877 states and 142473 transitions. [2021-01-26 14:23:37,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-26 14:23:37,943 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:23:37,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:23:38,031 INFO L225 Difference]: With dead ends: 63877 [2021-01-26 14:23:38,031 INFO L226 Difference]: Without dead ends: 63364 [2021-01-26 14:23:38,032 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=342, Invalid=1064, Unknown=0, NotChecked=0, Total=1406 [2021-01-26 14:23:38,032 INFO L78 Accepts]: Start accepts. Automaton has 63364 states. Word has length 58 [2021-01-26 14:23:38,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:23:38,032 INFO L481 AbstractCegarLoop]: Abstraction has 63364 states. [2021-01-26 14:23:38,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:23:38,032 INFO L276 IsEmpty]: Start isEmpty. Operand 63364 states. [2021-01-26 14:23:38,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:23:38,068 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:23:38,068 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:23:38,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:23:38,269 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:23:38,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:23:38,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1544097498, now seen corresponding path program 67 times [2021-01-26 14:23:38,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:23:38,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102149193] [2021-01-26 14:23:38,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:23:38,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:23:38,683 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:23:38,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102149193] [2021-01-26 14:23:38,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136915907] [2021-01-26 14:23:38,684 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:23:38,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:23:38,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:23:38,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:23:39,442 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:23:39,586 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:23:39,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:23:39,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-01-26 14:23:39,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767657754] [2021-01-26 14:23:39,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-26 14:23:39,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:23:39,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-26 14:23:39,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-01-26 14:23:39,591 INFO L87 Difference]: Start difference. First operand 63364 states. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:23:42,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:23:42,057 INFO L93 Difference]: Finished difference Result 64212 states and 143158 transitions. [2021-01-26 14:23:42,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-26 14:23:42,062 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:23:42,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:23:42,335 INFO L225 Difference]: With dead ends: 64212 [2021-01-26 14:23:42,335 INFO L226 Difference]: Without dead ends: 63699 [2021-01-26 14:23:42,335 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=326, Invalid=1156, Unknown=0, NotChecked=0, Total=1482 [2021-01-26 14:23:42,335 INFO L78 Accepts]: Start accepts. Automaton has 63699 states. Word has length 58 [2021-01-26 14:23:42,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:23:42,335 INFO L481 AbstractCegarLoop]: Abstraction has 63699 states. [2021-01-26 14:23:42,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:23:42,336 INFO L276 IsEmpty]: Start isEmpty. Operand 63699 states. [2021-01-26 14:23:42,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:23:42,363 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:23:42,364 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:23:42,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-01-26 14:23:42,578 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:23:42,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:23:42,578 INFO L82 PathProgramCache]: Analyzing trace with hash -660751790, now seen corresponding path program 68 times [2021-01-26 14:23:42,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:23:42,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584261618] [2021-01-26 14:23:42,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:23:42,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:23:43,008 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:23:43,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584261618] [2021-01-26 14:23:43,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794526139] [2021-01-26 14:23:43,008 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:23:43,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:23:43,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:23:43,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:23:43,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:23:43,740 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:23:43,751 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:23:43,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:23:43,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-01-26 14:23:43,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129872291] [2021-01-26 14:23:43,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-26 14:23:43,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:23:43,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-26 14:23:43,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-01-26 14:23:43,753 INFO L87 Difference]: Start difference. First operand 63699 states. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:23:46,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:23:46,792 INFO L93 Difference]: Finished difference Result 64547 states and 143843 transitions. [2021-01-26 14:23:46,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-26 14:23:46,797 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:23:46,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:23:46,878 INFO L225 Difference]: With dead ends: 64547 [2021-01-26 14:23:46,878 INFO L226 Difference]: Without dead ends: 64034 [2021-01-26 14:23:46,878 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=377, Invalid=1345, Unknown=0, NotChecked=0, Total=1722 [2021-01-26 14:23:46,878 INFO L78 Accepts]: Start accepts. Automaton has 64034 states. Word has length 58 [2021-01-26 14:23:46,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:23:46,878 INFO L481 AbstractCegarLoop]: Abstraction has 64034 states. [2021-01-26 14:23:46,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:23:46,879 INFO L276 IsEmpty]: Start isEmpty. Operand 64034 states. [2021-01-26 14:23:46,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:23:46,911 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:23:46,911 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:23:47,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:23:47,112 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:23:47,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:23:47,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1809295968, now seen corresponding path program 69 times [2021-01-26 14:23:47,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:23:47,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547809230] [2021-01-26 14:23:47,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:23:47,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:23:47,658 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:23:47,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547809230] [2021-01-26 14:23:47,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276987543] [2021-01-26 14:23:47,659 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:23:47,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-26 14:23:47,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:23:47,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-26 14:23:47,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:23:48,350 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:23:48,512 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:23:48,595 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:23:48,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:23:48,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:23:48,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662383892] [2021-01-26 14:23:48,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:23:48,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:23:48,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:23:48,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:23:48,597 INFO L87 Difference]: Start difference. First operand 64034 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:23:49,218 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 20 [2021-01-26 14:23:50,117 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 22 [2021-01-26 14:23:52,135 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 25 [2021-01-26 14:23:53,802 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 24 [2021-01-26 14:23:54,832 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 11 [2021-01-26 14:23:55,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:23:55,938 INFO L93 Difference]: Finished difference Result 69004 states and 153960 transitions. [2021-01-26 14:23:55,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-01-26 14:23:55,943 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:23:55,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:23:56,031 INFO L225 Difference]: With dead ends: 69004 [2021-01-26 14:23:56,031 INFO L226 Difference]: Without dead ends: 68004 [2021-01-26 14:23:56,032 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1506 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=903, Invalid=3653, Unknown=0, NotChecked=0, Total=4556 [2021-01-26 14:23:56,032 INFO L78 Accepts]: Start accepts. Automaton has 68004 states. Word has length 58 [2021-01-26 14:23:56,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:23:56,032 INFO L481 AbstractCegarLoop]: Abstraction has 68004 states. [2021-01-26 14:23:56,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:23:56,032 INFO L276 IsEmpty]: Start isEmpty. Operand 68004 states. [2021-01-26 14:23:56,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:23:56,064 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:23:56,064 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:23:56,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:23:56,265 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:23:56,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:23:56,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1142254788, now seen corresponding path program 70 times [2021-01-26 14:23:56,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:23:56,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863052620] [2021-01-26 14:23:56,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:23:56,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:23:56,737 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:23:56,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863052620] [2021-01-26 14:23:56,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047213180] [2021-01-26 14:23:56,737 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:23:56,788 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-26 14:23:56,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:23:56,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-26 14:23:56,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:23:57,399 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:23:57,408 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:23:57,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:23:57,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-01-26 14:23:57,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608773867] [2021-01-26 14:23:57,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-26 14:23:57,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:23:57,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-26 14:23:57,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2021-01-26 14:23:57,410 INFO L87 Difference]: Start difference. First operand 68004 states. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:24:00,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:24:00,785 INFO L93 Difference]: Finished difference Result 69027 states and 153360 transitions. [2021-01-26 14:24:00,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-26 14:24:00,790 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:24:00,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:24:00,875 INFO L225 Difference]: With dead ends: 69027 [2021-01-26 14:24:00,875 INFO L226 Difference]: Without dead ends: 68704 [2021-01-26 14:24:00,876 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=505, Invalid=1565, Unknown=0, NotChecked=0, Total=2070 [2021-01-26 14:24:00,876 INFO L78 Accepts]: Start accepts. Automaton has 68704 states. Word has length 58 [2021-01-26 14:24:00,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:24:00,876 INFO L481 AbstractCegarLoop]: Abstraction has 68704 states. [2021-01-26 14:24:00,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:24:00,876 INFO L276 IsEmpty]: Start isEmpty. Operand 68704 states. [2021-01-26 14:24:01,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-26 14:24:01,086 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:24:01,086 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:24:01,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:24:01,287 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:24:01,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:24:01,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1898255560, now seen corresponding path program 71 times [2021-01-26 14:24:01,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:24:01,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409501237] [2021-01-26 14:24:01,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:24:01,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:24:01,813 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:24:01,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409501237] [2021-01-26 14:24:01,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724858806] [2021-01-26 14:24:01,813 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:24:01,863 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-26 14:24:01,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:24:01,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-26 14:24:01,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:24:02,449 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:24:02,610 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:24:02,698 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:24:02,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:24:02,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-26 14:24:02,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192209450] [2021-01-26 14:24:02,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-26 14:24:02,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:24:02,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-26 14:24:02,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-01-26 14:24:02,700 INFO L87 Difference]: Start difference. First operand 68704 states. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:24:05,223 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 19 [2021-01-26 14:24:08,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:24:08,761 INFO L93 Difference]: Finished difference Result 71254 states and 158658 transitions. [2021-01-26 14:24:08,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-01-26 14:24:08,766 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-01-26 14:24:08,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:24:08,856 INFO L225 Difference]: With dead ends: 71254 [2021-01-26 14:24:08,856 INFO L226 Difference]: Without dead ends: 70554 [2021-01-26 14:24:08,857 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1353 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=913, Invalid=3247, Unknown=0, NotChecked=0, Total=4160 [2021-01-26 14:24:08,857 INFO L78 Accepts]: Start accepts. Automaton has 70554 states. Word has length 58 [2021-01-26 14:24:08,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:24:08,857 INFO L481 AbstractCegarLoop]: Abstraction has 70554 states. [2021-01-26 14:24:08,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:24:08,857 INFO L276 IsEmpty]: Start isEmpty. Operand 70554 states. [2021-01-26 14:24:09,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-26 14:24:09,040 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:24:09,040 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:24:09,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:24:09,255 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:24:09,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:24:09,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1241373133, now seen corresponding path program 72 times [2021-01-26 14:24:09,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:24:09,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513195520] [2021-01-26 14:24:09,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:24:09,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:24:09,825 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:24:09,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513195520] [2021-01-26 14:24:09,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546622285] [2021-01-26 14:24:09,825 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:24:09,880 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-01-26 14:24:09,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:24:09,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-26 14:24:09,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:24:10,802 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:24:10,805 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:24:10,808 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:24:10,928 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:24:10,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:24:10,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-01-26 14:24:10,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173722627] [2021-01-26 14:24:10,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-26 14:24:10,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:24:10,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-26 14:24:10,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-01-26 14:24:10,930 INFO L87 Difference]: Start difference. First operand 70554 states. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:24:11,575 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 16 [2021-01-26 14:24:13,469 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-01-26 14:24:14,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:24:14,186 INFO L93 Difference]: Finished difference Result 70917 states and 157596 transitions. [2021-01-26 14:24:14,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-26 14:24:14,191 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-26 14:24:14,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:24:14,282 INFO L225 Difference]: With dead ends: 70917 [2021-01-26 14:24:14,283 INFO L226 Difference]: Without dead ends: 70689 [2021-01-26 14:24:14,283 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=371, Invalid=1269, Unknown=0, NotChecked=0, Total=1640 [2021-01-26 14:24:14,283 INFO L78 Accepts]: Start accepts. Automaton has 70689 states. Word has length 63 [2021-01-26 14:24:14,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:24:14,283 INFO L481 AbstractCegarLoop]: Abstraction has 70689 states. [2021-01-26 14:24:14,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:24:14,283 INFO L276 IsEmpty]: Start isEmpty. Operand 70689 states. [2021-01-26 14:24:14,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-26 14:24:14,336 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:24:14,336 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:24:14,537 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:24:14,537 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:24:14,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:24:14,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1784254887, now seen corresponding path program 73 times [2021-01-26 14:24:14,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:24:14,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524242066] [2021-01-26 14:24:14,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:24:14,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:24:15,109 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:24:15,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524242066] [2021-01-26 14:24:15,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347348053] [2021-01-26 14:24:15,110 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:24:15,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:24:15,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-26 14:24:15,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:24:16,111 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:24:16,113 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:24:16,117 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:24:16,120 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:24:16,123 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:24:16,126 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:24:16,129 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:24:16,132 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:24:16,403 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2021-01-26 14:24:16,441 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:24:16,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:24:16,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-01-26 14:24:16,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632727700] [2021-01-26 14:24:16,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-26 14:24:16,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:24:16,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-26 14:24:16,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-01-26 14:24:16,442 INFO L87 Difference]: Start difference. First operand 70689 states. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:24:19,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:24:19,993 INFO L93 Difference]: Finished difference Result 71052 states and 157861 transitions. [2021-01-26 14:24:19,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-26 14:24:19,998 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-26 14:24:19,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:24:20,259 INFO L225 Difference]: With dead ends: 71052 [2021-01-26 14:24:20,260 INFO L226 Difference]: Without dead ends: 70824 [2021-01-26 14:24:20,260 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=412, Invalid=1568, Unknown=0, NotChecked=0, Total=1980 [2021-01-26 14:24:20,260 INFO L78 Accepts]: Start accepts. Automaton has 70824 states. Word has length 63 [2021-01-26 14:24:20,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:24:20,260 INFO L481 AbstractCegarLoop]: Abstraction has 70824 states. [2021-01-26 14:24:20,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:24:20,260 INFO L276 IsEmpty]: Start isEmpty. Operand 70824 states. [2021-01-26 14:24:20,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-26 14:24:20,307 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:24:20,307 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:24:20,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:24:20,507 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:24:20,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:24:20,508 INFO L82 PathProgramCache]: Analyzing trace with hash -788631545, now seen corresponding path program 74 times [2021-01-26 14:24:20,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:24:20,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66286130] [2021-01-26 14:24:20,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:24:20,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:24:21,054 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:24:21,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66286130] [2021-01-26 14:24:21,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788989650] [2021-01-26 14:24:21,054 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:24:21,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:24:21,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:24:21,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-26 14:24:21,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:24:22,062 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:24:22,065 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:24:22,067 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:24:22,186 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:24:22,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:24:22,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-01-26 14:24:22,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394934107] [2021-01-26 14:24:22,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-26 14:24:22,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:24:22,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-26 14:24:22,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2021-01-26 14:24:22,188 INFO L87 Difference]: Start difference. First operand 70824 states. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:24:26,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:24:26,412 INFO L93 Difference]: Finished difference Result 71112 states and 157981 transitions. [2021-01-26 14:24:26,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-26 14:24:26,417 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-26 14:24:26,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:24:26,509 INFO L225 Difference]: With dead ends: 71112 [2021-01-26 14:24:26,509 INFO L226 Difference]: Without dead ends: 70884 [2021-01-26 14:24:26,509 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=499, Invalid=1757, Unknown=0, NotChecked=0, Total=2256 [2021-01-26 14:24:26,509 INFO L78 Accepts]: Start accepts. Automaton has 70884 states. Word has length 63 [2021-01-26 14:24:26,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:24:26,509 INFO L481 AbstractCegarLoop]: Abstraction has 70884 states. [2021-01-26 14:24:26,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:24:26,510 INFO L276 IsEmpty]: Start isEmpty. Operand 70884 states. [2021-01-26 14:24:26,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-26 14:24:26,564 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:24:26,564 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:24:26,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-01-26 14:24:26,765 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:24:26,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:24:26,765 INFO L82 PathProgramCache]: Analyzing trace with hash -32630773, now seen corresponding path program 75 times [2021-01-26 14:24:26,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:24:26,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543754572] [2021-01-26 14:24:26,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:24:26,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:24:27,387 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:24:27,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543754572] [2021-01-26 14:24:27,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216409702] [2021-01-26 14:24:27,387 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:24:27,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-26 14:24:27,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:24:27,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-26 14:24:27,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:24:28,422 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:24:30,641 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 22 [2021-01-26 14:24:30,654 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:24:30,687 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:24:30,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:24:30,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-01-26 14:24:30,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007716368] [2021-01-26 14:24:30,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-26 14:24:30,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:24:30,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-26 14:24:30,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2021-01-26 14:24:30,688 INFO L87 Difference]: Start difference. First operand 70884 states. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:24:31,478 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 16 [2021-01-26 14:24:32,473 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 18 [2021-01-26 14:24:32,781 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 19 [2021-01-26 14:24:38,708 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 21 [2021-01-26 14:24:55,553 WARN L193 SmtUtils]: Spent 3.15 s on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2021-01-26 14:25:02,097 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 21 [2021-01-26 14:25:22,627 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 24 [2021-01-26 14:25:45,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:25:45,447 INFO L93 Difference]: Finished difference Result 71850 states and 159795 transitions. [2021-01-26 14:25:45,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-01-26 14:25:45,452 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-26 14:25:45,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:25:45,548 INFO L225 Difference]: With dead ends: 71850 [2021-01-26 14:25:45,548 INFO L226 Difference]: Without dead ends: 71354 [2021-01-26 14:25:45,549 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 54 SyntacticMatches, 5 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1134 ImplicationChecksByTransitivity, 26.5s TimeCoverageRelationStatistics Valid=744, Invalid=2789, Unknown=7, NotChecked=0, Total=3540 [2021-01-26 14:25:45,549 INFO L78 Accepts]: Start accepts. Automaton has 71354 states. Word has length 63 [2021-01-26 14:25:45,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:25:45,549 INFO L481 AbstractCegarLoop]: Abstraction has 71354 states. [2021-01-26 14:25:45,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:25:45,549 INFO L276 IsEmpty]: Start isEmpty. Operand 71354 states. [2021-01-26 14:25:45,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-26 14:25:45,605 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:25:45,605 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:25:45,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:25:45,806 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:25:45,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:25:45,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1863343861, now seen corresponding path program 76 times [2021-01-26 14:25:45,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:25:45,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956511197] [2021-01-26 14:25:45,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:25:45,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:25:46,410 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:25:46,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956511197] [2021-01-26 14:25:46,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195577451] [2021-01-26 14:25:46,410 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:25:46,468 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-26 14:25:46,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:25:46,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-26 14:25:46,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:25:47,078 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 12 [2021-01-26 14:25:49,817 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:25:49,877 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:25:49,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:25:49,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-01-26 14:25:49,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739785308] [2021-01-26 14:25:49,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-26 14:25:49,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:25:49,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-26 14:25:49,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=411, Unknown=1, NotChecked=0, Total=506 [2021-01-26 14:25:49,878 INFO L87 Difference]: Start difference. First operand 71354 states. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:25:50,530 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 18 [2021-01-26 14:25:50,918 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2021-01-26 14:25:51,293 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2021-01-26 14:25:51,527 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 20 [2021-01-26 14:25:52,625 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-01-26 14:26:00,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:26:00,292 INFO L93 Difference]: Finished difference Result 71597 states and 159022 transitions. [2021-01-26 14:26:00,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-01-26 14:26:00,297 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-26 14:26:00,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:26:00,390 INFO L225 Difference]: With dead ends: 71597 [2021-01-26 14:26:00,391 INFO L226 Difference]: Without dead ends: 71464 [2021-01-26 14:26:00,391 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=441, Invalid=1450, Unknown=1, NotChecked=0, Total=1892 [2021-01-26 14:26:00,391 INFO L78 Accepts]: Start accepts. Automaton has 71464 states. Word has length 63 [2021-01-26 14:26:00,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:26:00,391 INFO L481 AbstractCegarLoop]: Abstraction has 71464 states. [2021-01-26 14:26:00,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:26:00,391 INFO L276 IsEmpty]: Start isEmpty. Operand 71464 states. [2021-01-26 14:26:00,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-26 14:26:00,437 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:26:00,438 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:26:00,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-01-26 14:26:00,644 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:26:00,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:26:00,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1592421991, now seen corresponding path program 77 times [2021-01-26 14:26:00,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:26:00,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299592751] [2021-01-26 14:26:00,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:26:00,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:26:01,213 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:26:01,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299592751] [2021-01-26 14:26:01,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347936413] [2021-01-26 14:26:01,213 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:26:01,269 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-26 14:26:01,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:26:01,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-26 14:26:01,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:26:02,738 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:26:02,846 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:26:02,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:26:02,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-01-26 14:26:02,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451465000] [2021-01-26 14:26:02,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-26 14:26:02,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:26:02,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-26 14:26:02,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-01-26 14:26:02,847 INFO L87 Difference]: Start difference. First operand 71464 states. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:26:03,391 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 14 [2021-01-26 14:26:03,587 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 16 [2021-01-26 14:26:04,011 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 18 [2021-01-26 14:26:04,383 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 22 [2021-01-26 14:26:04,615 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 18 [2021-01-26 14:26:06,618 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-01-26 14:26:12,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:26:12,390 INFO L93 Difference]: Finished difference Result 72159 states and 160360 transitions. [2021-01-26 14:26:12,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-26 14:26:12,395 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-26 14:26:12,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:26:12,514 INFO L225 Difference]: With dead ends: 72159 [2021-01-26 14:26:12,514 INFO L226 Difference]: Without dead ends: 71704 [2021-01-26 14:26:12,514 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=423, Invalid=1469, Unknown=0, NotChecked=0, Total=1892 [2021-01-26 14:26:12,514 INFO L78 Accepts]: Start accepts. Automaton has 71704 states. Word has length 63 [2021-01-26 14:26:12,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:26:12,515 INFO L481 AbstractCegarLoop]: Abstraction has 71704 states. [2021-01-26 14:26:12,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:26:12,515 INFO L276 IsEmpty]: Start isEmpty. Operand 71704 states. [2021-01-26 14:26:12,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-26 14:26:12,803 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:26:12,804 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:26:13,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:26:13,004 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:26:13,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:26:13,005 INFO L82 PathProgramCache]: Analyzing trace with hash 899021825, now seen corresponding path program 78 times [2021-01-26 14:26:13,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:26:13,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597144681] [2021-01-26 14:26:13,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:26:13,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:26:13,640 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:26:13,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597144681] [2021-01-26 14:26:13,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496338985] [2021-01-26 14:26:13,641 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:26:13,695 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-01-26 14:26:13,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:26:13,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-26 14:26:13,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:26:18,880 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:26:18,903 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:26:18,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:26:18,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-01-26 14:26:18,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500787459] [2021-01-26 14:26:18,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-26 14:26:18,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:26:18,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-26 14:26:18,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=415, Unknown=2, NotChecked=0, Total=506 [2021-01-26 14:26:18,904 INFO L87 Difference]: Start difference. First operand 71704 states. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:26:20,254 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 14 [2021-01-26 14:26:20,514 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2021-01-26 14:26:20,805 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2021-01-26 14:26:20,999 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 20 [2021-01-26 14:26:21,711 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 16 [2021-01-26 14:26:24,246 WARN L193 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 36 [2021-01-26 14:26:24,698 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-01-26 14:26:29,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:26:29,786 INFO L93 Difference]: Finished difference Result 71872 states and 159567 transitions. [2021-01-26 14:26:29,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-26 14:26:29,792 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-26 14:26:29,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:26:29,886 INFO L225 Difference]: With dead ends: 71872 [2021-01-26 14:26:29,886 INFO L226 Difference]: Without dead ends: 71739 [2021-01-26 14:26:29,886 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=469, Invalid=1785, Unknown=2, NotChecked=0, Total=2256 [2021-01-26 14:26:29,887 INFO L78 Accepts]: Start accepts. Automaton has 71739 states. Word has length 63 [2021-01-26 14:26:29,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:26:29,887 INFO L481 AbstractCegarLoop]: Abstraction has 71739 states. [2021-01-26 14:26:29,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:26:29,887 INFO L276 IsEmpty]: Start isEmpty. Operand 71739 states. [2021-01-26 14:26:29,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-26 14:26:29,941 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:26:29,941 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:26:30,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-01-26 14:26:30,141 INFO L429 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:26:30,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:26:30,142 INFO L82 PathProgramCache]: Analyzing trace with hash 628099955, now seen corresponding path program 79 times [2021-01-26 14:26:30,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:26:30,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43935970] [2021-01-26 14:26:30,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:26:30,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:26:30,873 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2021-01-26 14:26:30,888 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:26:30,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43935970] [2021-01-26 14:26:30,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829540180] [2021-01-26 14:26:30,889 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:26:30,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:26:30,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-26 14:26:30,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:26:32,072 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:26:32,276 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:26:32,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:26:32,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-01-26 14:26:32,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47752001] [2021-01-26 14:26:32,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-26 14:26:32,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:26:32,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-26 14:26:32,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-01-26 14:26:32,278 INFO L87 Difference]: Start difference. First operand 71739 states. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:26:33,107 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 16 [2021-01-26 14:26:33,897 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 22 [2021-01-26 14:26:34,172 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 18 [2021-01-26 14:26:34,366 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 18 [2021-01-26 14:26:35,060 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 18 [2021-01-26 14:26:36,019 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2021-01-26 14:26:37,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:26:37,428 INFO L93 Difference]: Finished difference Result 72402 states and 160745 transitions. [2021-01-26 14:26:37,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-01-26 14:26:37,433 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-26 14:26:37,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:26:37,562 INFO L225 Difference]: With dead ends: 72402 [2021-01-26 14:26:37,563 INFO L226 Difference]: Without dead ends: 72079 [2021-01-26 14:26:37,563 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=499, Invalid=1853, Unknown=0, NotChecked=0, Total=2352 [2021-01-26 14:26:37,563 INFO L78 Accepts]: Start accepts. Automaton has 72079 states. Word has length 63 [2021-01-26 14:26:37,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:26:37,563 INFO L481 AbstractCegarLoop]: Abstraction has 72079 states. [2021-01-26 14:26:37,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:26:37,564 INFO L276 IsEmpty]: Start isEmpty. Operand 72079 states. [2021-01-26 14:26:37,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-26 14:26:37,642 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:26:37,642 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:26:37,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-01-26 14:26:37,857 INFO L429 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:26:37,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:26:37,857 INFO L82 PathProgramCache]: Analyzing trace with hash -853730911, now seen corresponding path program 80 times [2021-01-26 14:26:37,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:26:37,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006053828] [2021-01-26 14:26:37,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:26:37,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:26:38,540 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:26:38,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006053828] [2021-01-26 14:26:38,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442356677] [2021-01-26 14:26:38,541 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:26:38,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-26 14:26:38,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:26:38,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-26 14:26:38,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:26:39,883 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:26:39,887 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:26:39,986 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:26:39,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:26:39,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-01-26 14:26:39,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284383231] [2021-01-26 14:26:39,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-26 14:26:39,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:26:39,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-26 14:26:39,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-01-26 14:26:39,993 INFO L87 Difference]: Start difference. First operand 72079 states. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:26:40,647 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 12 [2021-01-26 14:26:40,884 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 18 [2021-01-26 14:26:41,092 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 16 [2021-01-26 14:26:42,059 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2021-01-26 14:26:42,350 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2021-01-26 14:26:42,628 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 20 [2021-01-26 14:26:43,366 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 16 [2021-01-26 14:26:44,944 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2021-01-26 14:26:56,781 WARN L193 SmtUtils]: Spent 770.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-01-26 14:27:01,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:27:01,562 INFO L93 Difference]: Finished difference Result 72452 states and 160727 transitions. [2021-01-26 14:27:01,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-01-26 14:27:01,568 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-26 14:27:01,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:27:01,662 INFO L225 Difference]: With dead ends: 72452 [2021-01-26 14:27:01,662 INFO L226 Difference]: Without dead ends: 72319 [2021-01-26 14:27:01,662 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=649, Invalid=2321, Unknown=0, NotChecked=0, Total=2970 [2021-01-26 14:27:01,662 INFO L78 Accepts]: Start accepts. Automaton has 72319 states. Word has length 63 [2021-01-26 14:27:01,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:27:01,663 INFO L481 AbstractCegarLoop]: Abstraction has 72319 states. [2021-01-26 14:27:01,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:27:01,663 INFO L276 IsEmpty]: Start isEmpty. Operand 72319 states. [2021-01-26 14:27:01,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-26 14:27:01,718 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:27:01,719 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:27:01,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-01-26 14:27:01,919 INFO L429 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:27:01,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:27:01,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1505154611, now seen corresponding path program 81 times [2021-01-26 14:27:01,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:27:01,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434193948] [2021-01-26 14:27:01,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:27:01,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:27:02,507 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:27:02,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434193948] [2021-01-26 14:27:02,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349353946] [2021-01-26 14:27:02,508 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:27:02,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-26 14:27:02,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:27:02,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-26 14:27:02,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:27:03,854 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:27:03,859 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:27:03,883 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:27:03,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:27:03,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-01-26 14:27:03,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473915746] [2021-01-26 14:27:03,884 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-26 14:27:03,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:27:03,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-26 14:27:03,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2021-01-26 14:27:03,885 INFO L87 Difference]: Start difference. First operand 72319 states. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:27:04,546 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 12 [2021-01-26 14:27:04,774 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 18 [2021-01-26 14:27:05,414 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 17 [2021-01-26 14:27:05,849 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2021-01-26 14:27:06,138 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 20 [2021-01-26 14:27:06,887 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 16 [2021-01-26 14:27:07,863 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-01-26 14:27:08,414 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-01-26 14:27:14,878 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2021-01-26 14:27:15,749 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2021-01-26 14:27:16,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:27:16,682 INFO L93 Difference]: Finished difference Result 72487 states and 160792 transitions. [2021-01-26 14:27:16,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-01-26 14:27:16,687 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-26 14:27:16,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:27:16,775 INFO L225 Difference]: With dead ends: 72487 [2021-01-26 14:27:16,775 INFO L226 Difference]: Without dead ends: 72354 [2021-01-26 14:27:16,775 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 835 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=682, Invalid=2288, Unknown=0, NotChecked=0, Total=2970 [2021-01-26 14:27:16,775 INFO L78 Accepts]: Start accepts. Automaton has 72354 states. Word has length 63 [2021-01-26 14:27:16,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:27:16,776 INFO L481 AbstractCegarLoop]: Abstraction has 72354 states. [2021-01-26 14:27:16,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:27:16,776 INFO L276 IsEmpty]: Start isEmpty. Operand 72354 states. [2021-01-26 14:27:16,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-26 14:27:16,825 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:27:16,825 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:27:17,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:27:17,026 INFO L429 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:27:17,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:27:17,026 INFO L82 PathProgramCache]: Analyzing trace with hash -749153839, now seen corresponding path program 82 times [2021-01-26 14:27:17,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:27:17,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396258912] [2021-01-26 14:27:17,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:27:17,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:27:17,689 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:27:17,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396258912] [2021-01-26 14:27:17,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251425126] [2021-01-26 14:27:17,689 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:27:17,747 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-26 14:27:17,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:27:17,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-26 14:27:17,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:27:20,757 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:27:21,039 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:27:21,059 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-26 14:27:21,210 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:27:21,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:27:21,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-01-26 14:27:21,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308698478] [2021-01-26 14:27:21,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-26 14:27:21,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:27:21,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-26 14:27:21,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=384, Unknown=1, NotChecked=0, Total=506 [2021-01-26 14:27:21,212 INFO L87 Difference]: Start difference. First operand 72354 states. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:27:21,865 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 15 [2021-01-26 14:27:22,111 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 12 [2021-01-26 14:27:22,506 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 18 [2021-01-26 14:27:27,112 WARN L193 SmtUtils]: Spent 4.18 s on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2021-01-26 14:27:27,442 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 17 [2021-01-26 14:27:27,696 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 14 [2021-01-26 14:27:32,186 WARN L193 SmtUtils]: Spent 4.22 s on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2021-01-26 14:27:33,016 WARN L193 SmtUtils]: Spent 652.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 20 [2021-01-26 14:27:33,256 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 13 [2021-01-26 14:27:39,727 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2021-01-26 14:27:40,837 WARN L193 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 16 [2021-01-26 14:27:43,325 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 22 [2021-01-26 14:27:45,749 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-01-26 14:27:46,527 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-01-26 14:27:46,934 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 13 [2021-01-26 14:27:47,361 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2021-01-26 14:27:52,677 WARN L193 SmtUtils]: Spent 1.52 s on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2021-01-26 14:28:03,563 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2021-01-26 14:28:07,108 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 22 [2021-01-26 14:28:22,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:28:22,808 INFO L93 Difference]: Finished difference Result 72858 states and 161761 transitions. [2021-01-26 14:28:22,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-01-26 14:28:22,814 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-26 14:28:22,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:28:22,911 INFO L225 Difference]: With dead ends: 72858 [2021-01-26 14:28:22,911 INFO L226 Difference]: Without dead ends: 72564 [2021-01-26 14:28:22,912 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1433 ImplicationChecksByTransitivity, 31.8s TimeCoverageRelationStatistics Valid=971, Invalid=3315, Unknown=4, NotChecked=0, Total=4290 [2021-01-26 14:28:22,912 INFO L78 Accepts]: Start accepts. Automaton has 72564 states. Word has length 63 [2021-01-26 14:28:22,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:28:22,912 INFO L481 AbstractCegarLoop]: Abstraction has 72564 states. [2021-01-26 14:28:22,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:28:22,912 INFO L276 IsEmpty]: Start isEmpty. Operand 72564 states. [2021-01-26 14:28:22,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-26 14:28:22,968 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:28:22,968 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:28:23,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-01-26 14:28:23,168 INFO L429 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:28:23,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:28:23,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1259088443, now seen corresponding path program 83 times [2021-01-26 14:28:23,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:28:23,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976026531] [2021-01-26 14:28:23,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:28:23,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:28:23,843 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:28:23,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976026531] [2021-01-26 14:28:23,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405638109] [2021-01-26 14:28:23,844 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:28:23,901 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-26 14:28:23,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:28:23,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-26 14:28:23,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:28:24,797 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 17 [2021-01-26 14:28:25,607 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:28:25,641 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:28:25,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:28:25,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-01-26 14:28:25,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908722047] [2021-01-26 14:28:25,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-26 14:28:25,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:28:25,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-26 14:28:25,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-01-26 14:28:25,643 INFO L87 Difference]: Start difference. First operand 72564 states. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:28:26,270 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 14 [2021-01-26 14:28:26,528 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 16 [2021-01-26 14:28:27,297 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 15 [2021-01-26 14:28:27,567 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 22 [2021-01-26 14:28:28,018 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 18 [2021-01-26 14:28:28,440 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 15 [2021-01-26 14:28:28,649 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 18 [2021-01-26 14:28:29,373 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 18 [2021-01-26 14:28:29,628 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-01-26 14:28:30,062 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 21 [2021-01-26 14:28:31,048 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2021-01-26 14:28:32,831 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-01-26 14:28:35,916 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 11 [2021-01-26 14:28:37,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:28:37,714 INFO L93 Difference]: Finished difference Result 73504 states and 163155 transitions. [2021-01-26 14:28:37,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-01-26 14:28:37,720 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-26 14:28:37,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:28:37,838 INFO L225 Difference]: With dead ends: 73504 [2021-01-26 14:28:37,839 INFO L226 Difference]: Without dead ends: 73049 [2021-01-26 14:28:37,839 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 952 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=694, Invalid=2612, Unknown=0, NotChecked=0, Total=3306 [2021-01-26 14:28:37,839 INFO L78 Accepts]: Start accepts. Automaton has 73049 states. Word has length 63 [2021-01-26 14:28:37,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:28:37,839 INFO L481 AbstractCegarLoop]: Abstraction has 73049 states. [2021-01-26 14:28:37,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:28:37,840 INFO L276 IsEmpty]: Start isEmpty. Operand 73049 states. [2021-01-26 14:28:37,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-26 14:28:37,895 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:28:37,895 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:28:38,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:28:38,096 INFO L429 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:28:38,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:28:38,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1313797989, now seen corresponding path program 84 times [2021-01-26 14:28:38,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:28:38,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275597343] [2021-01-26 14:28:38,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:28:38,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:28:38,726 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:28:38,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275597343] [2021-01-26 14:28:38,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080726965] [2021-01-26 14:28:38,727 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:28:38,785 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-26 14:28:38,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-26 14:28:38,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-26 14:28:38,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:28:40,092 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:28:40,343 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:28:40,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:28:40,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-01-26 14:28:40,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982029553] [2021-01-26 14:28:40,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-26 14:28:40,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:28:40,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-26 14:28:40,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-01-26 14:28:40,347 INFO L87 Difference]: Start difference. First operand 73049 states. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:28:41,073 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 14 [2021-01-26 14:28:41,318 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 16 [2021-01-26 14:28:41,694 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 19 [2021-01-26 14:28:42,300 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 22 [2021-01-26 14:28:42,529 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 18 [2021-01-26 14:28:43,142 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 18 [2021-01-26 14:28:43,442 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 17 [2021-01-26 14:28:43,954 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-01-26 14:28:44,359 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-01-26 14:28:45,734 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-01-26 14:28:48,153 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 11 [2021-01-26 14:28:48,610 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-01-26 14:28:49,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-26 14:28:49,307 INFO L93 Difference]: Finished difference Result 73602 states and 163275 transitions. [2021-01-26 14:28:49,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-01-26 14:28:49,313 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-01-26 14:28:49,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-26 14:28:49,602 INFO L225 Difference]: With dead ends: 73602 [2021-01-26 14:28:49,602 INFO L226 Difference]: Without dead ends: 73279 [2021-01-26 14:28:49,603 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 722 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=598, Invalid=2054, Unknown=0, NotChecked=0, Total=2652 [2021-01-26 14:28:49,603 INFO L78 Accepts]: Start accepts. Automaton has 73279 states. Word has length 63 [2021-01-26 14:28:49,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-26 14:28:49,603 INFO L481 AbstractCegarLoop]: Abstraction has 73279 states. [2021-01-26 14:28:49,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:28:49,603 INFO L276 IsEmpty]: Start isEmpty. Operand 73279 states. [2021-01-26 14:28:49,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-26 14:28:49,671 INFO L496 BasicCegarLoop]: Found error trace [2021-01-26 14:28:49,671 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-26 14:28:49,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-01-26 14:28:49,885 INFO L429 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-26 14:28:49,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-26 14:28:49,886 INFO L82 PathProgramCache]: Analyzing trace with hash -557797217, now seen corresponding path program 85 times [2021-01-26 14:28:49,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-26 14:28:49,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963923351] [2021-01-26 14:28:49,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-26 14:28:49,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:28:50,648 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:28:50,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963923351] [2021-01-26 14:28:50,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477229327] [2021-01-26 14:28:50,648 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:28:50,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-26 14:28:50,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-26 14:28:50,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-26 14:28:55,997 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:28:56,458 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-01-26 14:28:56,488 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-26 14:28:56,522 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-26 14:28:56,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-26 14:28:56,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-01-26 14:28:56,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713881654] [2021-01-26 14:28:56,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-26 14:28:56,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-26 14:28:56,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-26 14:28:56,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=388, Unknown=2, NotChecked=0, Total=506 [2021-01-26 14:28:56,524 INFO L87 Difference]: Start difference. First operand 73279 states. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-26 14:28:57,049 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 13 [2021-01-26 14:28:57,219 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 14 [2021-01-26 14:28:57,579 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 16 [2021-01-26 14:28:58,316 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 19 [2021-01-26 14:28:58,589 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 15 [2021-01-26 14:28:58,787 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 15 [2021-01-26 14:28:59,417 WARN L193 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 22 [2021-01-26 14:28:59,757 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 18 [2021-01-26 14:29:00,006 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 15 [2021-01-26 14:29:02,632 WARN L193 SmtUtils]: Spent 2.07 s on a formula simplification that was a NOOP. DAG size: 41 [2021-01-26 14:29:02,916 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 18 [2021-01-26 14:29:03,209 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 18 [2021-01-26 14:29:06,462 WARN L193 SmtUtils]: Spent 2.89 s on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-01-26 14:29:10,898 WARN L193 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-01-26 14:29:11,299 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 21 [2021-01-26 14:29:11,694 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2021-01-26 14:29:12,193 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2021-01-26 14:29:13,614 WARN L193 SmtUtils]: Spent 673.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2021-01-26 14:29:16,241 WARN L193 SmtUtils]: Spent 607.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-01-26 14:29:19,222 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 20 [2021-01-26 14:29:20,288 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-01-26 14:29:22,577 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-01-26 14:29:22,874 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2021-01-26 14:29:23,325 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-01-26 14:29:27,872 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2021-01-26 14:29:29,558 WARN L193 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 Received shutdown request... [2021-01-26 14:29:32,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-01-26 14:29:32,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-26 14:29:32,695 WARN L546 AbstractCegarLoop]: Verification canceled [2021-01-26 14:29:32,702 WARN L250 ceAbstractionStarter]: Timeout [2021-01-26 14:29:32,702 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.01 02:29:32 BasicIcfg [2021-01-26 14:29:32,703 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-26 14:29:32,704 INFO L168 Benchmark]: Toolchain (without parser) took 747228.52 ms. Allocated memory was 302.0 MB in the beginning and 5.1 GB in the end (delta: 4.8 GB). Free memory was 277.3 MB in the beginning and 1.9 GB in the end (delta: -1.6 GB). Peak memory consumption was 3.1 GB. Max. memory is 16.0 GB. [2021-01-26 14:29:32,704 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 302.0 MB. Free memory is still 272.5 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-01-26 14:29:32,704 INFO L168 Benchmark]: CACSL2BoogieTranslator took 712.90 ms. Allocated memory is still 302.0 MB. Free memory was 276.4 MB in the beginning and 247.5 MB in the end (delta: 28.9 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.0 GB. [2021-01-26 14:29:32,704 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.77 ms. Allocated memory is still 302.0 MB. Free memory was 247.5 MB in the beginning and 245.7 MB in the end (delta: 1.9 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-01-26 14:29:32,705 INFO L168 Benchmark]: Boogie Preprocessor took 39.39 ms. Allocated memory is still 302.0 MB. Free memory was 245.7 MB in the beginning and 284.9 MB in the end (delta: -39.2 MB). Peak memory consumption was 8.5 MB. Max. memory is 16.0 GB. [2021-01-26 14:29:32,705 INFO L168 Benchmark]: RCFGBuilder took 621.20 ms. Allocated memory is still 302.0 MB. Free memory was 284.9 MB in the beginning and 263.9 MB in the end (delta: 21.0 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.0 GB. [2021-01-26 14:29:32,705 INFO L168 Benchmark]: TraceAbstraction took 745762.73 ms. Allocated memory was 302.0 MB in the beginning and 5.1 GB in the end (delta: 4.8 GB). Free memory was 262.8 MB in the beginning and 1.9 GB in the end (delta: -1.6 GB). Peak memory consumption was 3.1 GB. Max. memory is 16.0 GB. [2021-01-26 14:29:32,707 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 302.0 MB. Free memory is still 272.5 MB. There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 712.90 ms. Allocated memory is still 302.0 MB. Free memory was 276.4 MB in the beginning and 247.5 MB in the end (delta: 28.9 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 49.77 ms. Allocated memory is still 302.0 MB. Free memory was 247.5 MB in the beginning and 245.7 MB in the end (delta: 1.9 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 39.39 ms. Allocated memory is still 302.0 MB. Free memory was 245.7 MB in the beginning and 284.9 MB in the end (delta: -39.2 MB). Peak memory consumption was 8.5 MB. Max. memory is 16.0 GB. * RCFGBuilder took 621.20 ms. Allocated memory is still 302.0 MB. Free memory was 284.9 MB in the beginning and 263.9 MB in the end (delta: 21.0 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.0 GB. * TraceAbstraction took 745762.73 ms. Allocated memory was 302.0 MB in the beginning and 5.1 GB in the end (delta: 4.8 GB). Free memory was 262.8 MB in the beginning and 1.9 GB in the end (delta: -1.6 GB). Peak memory consumption was 3.1 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 20]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 20). Cancelled while BasicCegarLoop was constructing difference of abstraction (73279states) and FLOYD_HOARE automaton (currently 44 states, 23 states before enhancement),while ReachableStatesComputation was computing reachable states (6226 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 61 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 745.5s, OverallIterations: 108, TraceHistogramMax: 6, AutomataDifference: 618.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 9821 SDtfs, 86505 SDslu, 110826 SDs, 0 SdLazy, 18834 SolverSat, 6553 SolverUnsat, 111 SolverUnknown, 0 SolverNotchecked, 261.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9110 GetRequests, 4886 SyntacticMatches, 76 SemanticMatches, 4148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55374 ImplicationChecksByTransitivity, 389.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=73279occurred in iteration=107, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.1s SsaConstructionTime, 2.9s SatisfiabilityAnalysisTime, 93.0s InterpolantComputationTime, 11365 NumberOfCodeBlocks, 11365 NumberOfCodeBlocksAsserted, 355 NumberOfCheckSat, 11155 ConstructedInterpolants, 18 QuantifiedInterpolants, 4800974 SizeOfPredicates, 426 NumberOfNonLiveVariables, 13726 ConjunctsInSsa, 1297 ConjunctsInUnsatCore, 210 InterpolantComputations, 7 PerfectInterpolantSequences, 103/3658 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown