/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-keepdead.epf -i ../../../trunk/examples/svcomp/pthread/triangular-longer-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-aa1e80b [2020-12-17 20:43:37,002 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-17 20:43:37,006 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-17 20:43:37,053 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-17 20:43:37,054 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-17 20:43:37,055 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-17 20:43:37,058 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-17 20:43:37,061 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-17 20:43:37,063 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-17 20:43:37,066 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-17 20:43:37,067 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-17 20:43:37,070 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-17 20:43:37,070 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-17 20:43:37,072 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-17 20:43:37,074 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-17 20:43:37,076 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-17 20:43:37,078 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-17 20:43:37,080 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-17 20:43:37,085 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-17 20:43:37,091 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-17 20:43:37,098 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-17 20:43:37,100 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-17 20:43:37,102 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-17 20:43:37,104 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-17 20:43:37,108 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-17 20:43:37,108 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-17 20:43:37,109 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-17 20:43:37,110 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-17 20:43:37,111 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-17 20:43:37,113 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-17 20:43:37,114 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-17 20:43:37,115 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-17 20:43:37,117 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-17 20:43:37,118 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-17 20:43:37,120 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-17 20:43:37,121 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-17 20:43:37,122 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-17 20:43:37,123 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-17 20:43:37,123 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-17 20:43:37,124 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-17 20:43:37,125 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-17 20:43:37,126 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-keepdead.epf [2020-12-17 20:43:37,158 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-17 20:43:37,159 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-17 20:43:37,161 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-17 20:43:37,162 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-17 20:43:37,162 INFO L138 SettingsManager]: * Use SBE=true [2020-12-17 20:43:37,163 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-17 20:43:37,163 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-17 20:43:37,163 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-17 20:43:37,164 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-17 20:43:37,164 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-17 20:43:37,164 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-17 20:43:37,165 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-17 20:43:37,165 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-17 20:43:37,165 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-17 20:43:37,166 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-17 20:43:37,166 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-17 20:43:37,166 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-17 20:43:37,167 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-17 20:43:37,167 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-17 20:43:37,168 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-12-17 20:43:37,168 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-17 20:43:37,168 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-17 20:43:37,169 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-17 20:43:37,169 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-17 20:43:37,169 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-17 20:43:37,170 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-17 20:43:37,170 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-17 20:43:37,170 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-12-17 20:43:37,170 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-17 20:43:37,171 INFO L138 SettingsManager]: * Remove dead ends from automaton=false [2020-12-17 20:43:37,171 INFO L138 SettingsManager]: * Minimization of abstraction=NONE [2020-12-17 20:43:37,172 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-17 20:43:37,747 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-17 20:43:37,789 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-17 20:43:37,793 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-17 20:43:37,795 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-17 20:43:37,797 INFO L275 PluginConnector]: CDTParser initialized [2020-12-17 20:43:37,799 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longer-2.i [2020-12-17 20:43:37,902 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de5ba37b3/9a8603ba850f4086bb0193b41f3ff4f4/FLAG92a87cd8d [2020-12-17 20:43:38,765 INFO L306 CDTParser]: Found 1 translation units. [2020-12-17 20:43:38,772 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-2.i [2020-12-17 20:43:38,808 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de5ba37b3/9a8603ba850f4086bb0193b41f3ff4f4/FLAG92a87cd8d [2020-12-17 20:43:38,991 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de5ba37b3/9a8603ba850f4086bb0193b41f3ff4f4 [2020-12-17 20:43:38,998 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-17 20:43:39,002 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-12-17 20:43:39,008 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-17 20:43:39,008 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-17 20:43:39,014 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-17 20:43:39,015 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 08:43:38" (1/1) ... [2020-12-17 20:43:39,027 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d926e7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:43:39, skipping insertion in model container [2020-12-17 20:43:39,028 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 08:43:38" (1/1) ... [2020-12-17 20:43:39,040 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-17 20:43:39,131 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-17 20:43:39,831 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-17 20:43:39,848 INFO L203 MainTranslator]: Completed pre-run [2020-12-17 20:43:39,941 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-17 20:43:40,043 INFO L208 MainTranslator]: Completed translation [2020-12-17 20:43:40,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:43:40 WrapperNode [2020-12-17 20:43:40,044 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-17 20:43:40,046 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-17 20:43:40,046 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-17 20:43:40,047 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-17 20:43:40,058 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:43:40" (1/1) ... [2020-12-17 20:43:40,077 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:43:40" (1/1) ... [2020-12-17 20:43:40,129 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-17 20:43:40,131 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-17 20:43:40,131 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-17 20:43:40,131 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-17 20:43:40,142 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:43:40" (1/1) ... [2020-12-17 20:43:40,146 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:43:40" (1/1) ... [2020-12-17 20:43:40,157 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:43:40" (1/1) ... [2020-12-17 20:43:40,157 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:43:40" (1/1) ... [2020-12-17 20:43:40,180 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:43:40" (1/1) ... [2020-12-17 20:43:40,189 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:43:40" (1/1) ... [2020-12-17 20:43:40,194 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:43:40" (1/1) ... [2020-12-17 20:43:40,208 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-17 20:43:40,209 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-17 20:43:40,209 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-17 20:43:40,209 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-17 20:43:40,211 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:43:40" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-17 20:43:40,320 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-12-17 20:43:40,321 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-12-17 20:43:40,322 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-12-17 20:43:40,322 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-12-17 20:43:40,323 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-17 20:43:40,324 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-12-17 20:43:40,324 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-17 20:43:40,325 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-17 20:43:40,325 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-17 20:43:40,326 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-12-17 20:43:40,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-17 20:43:40,326 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-17 20:43:40,329 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-12-17 20:43:40,859 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-17 20:43:40,860 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-17 20:43:40,863 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 08:43:40 BoogieIcfgContainer [2020-12-17 20:43:40,863 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-17 20:43:40,866 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-17 20:43:40,866 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-17 20:43:40,871 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-17 20:43:40,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 08:43:38" (1/3) ... [2020-12-17 20:43:40,873 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14ac75fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 08:43:40, skipping insertion in model container [2020-12-17 20:43:40,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:43:40" (2/3) ... [2020-12-17 20:43:40,874 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14ac75fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 08:43:40, skipping insertion in model container [2020-12-17 20:43:40,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 08:43:40" (3/3) ... [2020-12-17 20:43:40,876 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longer-2.i [2020-12-17 20:43:40,900 WARN L168 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-12-17 20:43:40,901 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-17 20:43:40,907 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-17 20:43:40,909 INFO L351 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-12-17 20:43:40,946 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:43:40,946 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:43:40,947 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:43:40,947 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:43:40,947 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:43:40,948 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:43:40,948 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:43:40,948 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:43:40,949 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:43:40,949 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:43:40,949 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:43:40,949 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:43:40,950 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:43:40,950 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:43:40,950 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:43:40,951 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:43:40,951 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:43:40,951 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:43:40,952 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:43:40,952 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:43:40,952 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:43:40,953 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:43:40,953 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:43:40,953 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:43:40,953 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:43:40,954 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:43:40,954 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:43:40,954 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:43:40,955 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:43:40,955 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:43:40,955 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:43:40,956 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:43:40,956 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:43:40,956 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:43:40,957 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:43:40,957 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:43:40,957 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:43:40,957 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:43:40,958 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:43:40,958 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:43:40,958 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:43:40,959 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:43:40,959 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:43:40,959 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:43:40,959 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:43:40,960 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:43:40,960 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:43:40,961 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:43:40,961 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:43:40,961 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:43:40,961 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:43:40,961 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:43:40,962 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:43:40,962 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:43:40,962 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:43:40,963 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:43:40,965 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:43:40,966 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:43:40,966 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:43:40,967 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:43:40,967 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:43:40,967 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:43:40,974 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:43:40,975 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:43:40,975 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:43:40,975 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:43:40,976 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:43:40,976 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:43:40,979 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-12-17 20:43:40,998 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-12-17 20:43:41,030 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-17 20:43:41,030 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-17 20:43:41,030 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-17 20:43:41,030 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-17 20:43:41,031 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-17 20:43:41,031 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-17 20:43:41,031 INFO L383 AbstractCegarLoop]: Minimize is NONE [2020-12-17 20:43:41,031 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-17 20:43:41,047 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 65 places, 64 transitions, 138 flow [2020-12-17 20:43:41,240 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1848 states, 1846 states have (on average 3.2183098591549295) internal successors, (5941), 1847 states have internal predecessors, (5941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:41,256 INFO L276 IsEmpty]: Start isEmpty. Operand has 1848 states, 1846 states have (on average 3.2183098591549295) internal successors, (5941), 1847 states have internal predecessors, (5941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:41,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-17 20:43:41,288 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:43:41,290 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] [2020-12-17 20:43:41,291 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:43:41,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:43:41,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1900887756, now seen corresponding path program 1 times [2020-12-17 20:43:41,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:43:41,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454190529] [2020-12-17 20:43:41,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:43:41,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:43:41,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:41,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454190529] [2020-12-17 20:43:41,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-17 20:43:41,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-17 20:43:41,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953223970] [2020-12-17 20:43:41,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-17 20:43:41,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:43:42,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-17 20:43:42,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-17 20:43:42,047 INFO L87 Difference]: Start difference. First operand has 1848 states, 1846 states have (on average 3.2183098591549295) internal successors, (5941), 1847 states have internal predecessors, (5941), 0 states have call successors, (0), 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) [2020-12-17 20:43:42,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:43:42,367 INFO L93 Difference]: Finished difference Result 3507 states and 10199 transitions. [2020-12-17 20:43:42,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-17 20:43:42,370 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 [2020-12-17 20:43:42,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:43:42,373 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-12-17 20:43:42,374 INFO L78 Accepts]: Start accepts. Automaton has 3507 states and 10199 transitions. Word has length 28 [2020-12-17 20:43:42,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:43:42,376 INFO L481 AbstractCegarLoop]: Abstraction has 3507 states and 10199 transitions. [2020-12-17 20:43:42,376 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) [2020-12-17 20:43:42,377 INFO L276 IsEmpty]: Start isEmpty. Operand 3507 states and 10199 transitions. [2020-12-17 20:43:42,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-17 20:43:42,386 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:43:42,386 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] [2020-12-17 20:43:42,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-17 20:43:42,387 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:43:42,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:43:42,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1614586761, now seen corresponding path program 1 times [2020-12-17 20:43:42,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:43:42,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538036899] [2020-12-17 20:43:42,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:43:42,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:43:42,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:42,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538036899] [2020-12-17 20:43:42,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-17 20:43:42,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-17 20:43:42,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148450551] [2020-12-17 20:43:42,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-17 20:43:42,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:43:42,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-17 20:43:42,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-17 20:43:42,693 INFO L87 Difference]: Start difference. First operand 3507 states and 10199 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:42,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:43:42,950 INFO L93 Difference]: Finished difference Result 3987 states and 11599 transitions. [2020-12-17 20:43:42,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-17 20:43:42,951 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 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 32 [2020-12-17 20:43:42,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:43:42,953 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-12-17 20:43:42,953 INFO L78 Accepts]: Start accepts. Automaton has 3987 states and 11599 transitions. Word has length 32 [2020-12-17 20:43:42,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:43:42,954 INFO L481 AbstractCegarLoop]: Abstraction has 3987 states and 11599 transitions. [2020-12-17 20:43:42,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:42,954 INFO L276 IsEmpty]: Start isEmpty. Operand 3987 states and 11599 transitions. [2020-12-17 20:43:42,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-17 20:43:42,958 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:43:42,958 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] [2020-12-17 20:43:42,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-17 20:43:42,959 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:43:42,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:43:42,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1199752031, now seen corresponding path program 1 times [2020-12-17 20:43:42,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:43:42,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446093203] [2020-12-17 20:43:42,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:43:42,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:43:43,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:43,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446093203] [2020-12-17 20:43:43,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-17 20:43:43,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-17 20:43:43,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473161378] [2020-12-17 20:43:43,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-17 20:43:43,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:43:43,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-17 20:43:43,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-17 20:43:43,126 INFO L87 Difference]: Start difference. First operand 3987 states and 11599 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:43,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:43:43,531 INFO L93 Difference]: Finished difference Result 5915 states and 17263 transitions. [2020-12-17 20:43:43,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-17 20:43:43,532 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 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 32 [2020-12-17 20:43:43,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:43:43,535 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-12-17 20:43:43,536 INFO L78 Accepts]: Start accepts. Automaton has 5915 states and 17263 transitions. Word has length 32 [2020-12-17 20:43:43,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:43:43,537 INFO L481 AbstractCegarLoop]: Abstraction has 5915 states and 17263 transitions. [2020-12-17 20:43:43,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:43,539 INFO L276 IsEmpty]: Start isEmpty. Operand 5915 states and 17263 transitions. [2020-12-17 20:43:43,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-17 20:43:43,545 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:43:43,545 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] [2020-12-17 20:43:43,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-17 20:43:43,546 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:43:43,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:43:43,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1202725261, now seen corresponding path program 2 times [2020-12-17 20:43:43,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:43:43,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122068957] [2020-12-17 20:43:43,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:43:43,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:43:43,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:43,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122068957] [2020-12-17 20:43:43,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-17 20:43:43,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-17 20:43:43,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988383903] [2020-12-17 20:43:43,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-17 20:43:43,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:43:43,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-17 20:43:43,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-17 20:43:43,826 INFO L87 Difference]: Start difference. First operand 5915 states and 17263 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:44,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:43:44,103 INFO L93 Difference]: Finished difference Result 5915 states and 17199 transitions. [2020-12-17 20:43:44,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-17 20:43:44,104 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 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 32 [2020-12-17 20:43:44,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:43:44,105 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-12-17 20:43:44,105 INFO L78 Accepts]: Start accepts. Automaton has 5915 states and 17199 transitions. Word has length 32 [2020-12-17 20:43:44,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:43:44,106 INFO L481 AbstractCegarLoop]: Abstraction has 5915 states and 17199 transitions. [2020-12-17 20:43:44,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:44,106 INFO L276 IsEmpty]: Start isEmpty. Operand 5915 states and 17199 transitions. [2020-12-17 20:43:44,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-17 20:43:44,115 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:43:44,116 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] [2020-12-17 20:43:44,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-17 20:43:44,116 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:43:44,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:43:44,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1299742308, now seen corresponding path program 1 times [2020-12-17 20:43:44,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:43:44,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431449264] [2020-12-17 20:43:44,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:43:44,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:43:44,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:44,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431449264] [2020-12-17 20:43:44,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-17 20:43:44,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-17 20:43:44,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665231337] [2020-12-17 20:43:44,298 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-17 20:43:44,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:43:44,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-17 20:43:44,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-17 20:43:44,302 INFO L87 Difference]: Start difference. First operand 5915 states and 17199 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:44,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:43:44,657 INFO L93 Difference]: Finished difference Result 9179 states and 26799 transitions. [2020-12-17 20:43:44,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-17 20:43:44,658 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2020-12-17 20:43:44,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:43:44,671 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-12-17 20:43:44,671 INFO L78 Accepts]: Start accepts. Automaton has 9179 states and 26799 transitions. Word has length 36 [2020-12-17 20:43:44,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:43:44,673 INFO L481 AbstractCegarLoop]: Abstraction has 9179 states and 26799 transitions. [2020-12-17 20:43:44,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:44,674 INFO L276 IsEmpty]: Start isEmpty. Operand 9179 states and 26799 transitions. [2020-12-17 20:43:44,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-17 20:43:44,685 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:43:44,686 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] [2020-12-17 20:43:44,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-17 20:43:44,686 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:43:44,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:43:44,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1296769078, now seen corresponding path program 2 times [2020-12-17 20:43:44,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:43:44,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581055584] [2020-12-17 20:43:44,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:43:44,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:43:44,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:44,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581055584] [2020-12-17 20:43:44,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-17 20:43:44,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-17 20:43:44,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925815422] [2020-12-17 20:43:44,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-17 20:43:44,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:43:44,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-17 20:43:44,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-17 20:43:44,892 INFO L87 Difference]: Start difference. First operand 9179 states and 26799 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:45,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:43:45,211 INFO L93 Difference]: Finished difference Result 9115 states and 26543 transitions. [2020-12-17 20:43:45,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-17 20:43:45,212 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2020-12-17 20:43:45,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:43:45,213 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-12-17 20:43:45,213 INFO L78 Accepts]: Start accepts. Automaton has 9115 states and 26543 transitions. Word has length 36 [2020-12-17 20:43:45,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:43:45,213 INFO L481 AbstractCegarLoop]: Abstraction has 9115 states and 26543 transitions. [2020-12-17 20:43:45,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:45,214 INFO L276 IsEmpty]: Start isEmpty. Operand 9115 states and 26543 transitions. [2020-12-17 20:43:45,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-17 20:43:45,223 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:43:45,223 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] [2020-12-17 20:43:45,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-17 20:43:45,223 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:43:45,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:43:45,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1841087432, now seen corresponding path program 3 times [2020-12-17 20:43:45,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:43:45,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421051962] [2020-12-17 20:43:45,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:43:45,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:43:45,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:45,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421051962] [2020-12-17 20:43:45,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-17 20:43:45,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-17 20:43:45,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300715179] [2020-12-17 20:43:45,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-17 20:43:45,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:43:45,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-17 20:43:45,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-17 20:43:45,487 INFO L87 Difference]: Start difference. First operand 9115 states and 26543 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:45,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:43:45,756 INFO L93 Difference]: Finished difference Result 10251 states and 29887 transitions. [2020-12-17 20:43:45,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-17 20:43:45,757 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2020-12-17 20:43:45,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:43:45,758 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-17 20:43:45,758 INFO L78 Accepts]: Start accepts. Automaton has 10251 states and 29887 transitions. Word has length 36 [2020-12-17 20:43:45,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:43:45,758 INFO L481 AbstractCegarLoop]: Abstraction has 10251 states and 29887 transitions. [2020-12-17 20:43:45,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:45,759 INFO L276 IsEmpty]: Start isEmpty. Operand 10251 states and 29887 transitions. [2020-12-17 20:43:45,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-17 20:43:45,779 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:43:45,779 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] [2020-12-17 20:43:45,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-17 20:43:45,780 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:43:45,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:43:45,780 INFO L82 PathProgramCache]: Analyzing trace with hash -940103400, now seen corresponding path program 1 times [2020-12-17 20:43:45,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:43:45,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040989973] [2020-12-17 20:43:45,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:43:45,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:43:45,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:45,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040989973] [2020-12-17 20:43:45,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746585964] [2020-12-17 20:43:45,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:43:46,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:43:46,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-17 20:43:46,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:43:46,301 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:43:46,397 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:43:46,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:46,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:43:46,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-17 20:43:46,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018689867] [2020-12-17 20:43:46,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-17 20:43:46,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:43:46,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-17 20:43:46,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-12-17 20:43:46,430 INFO L87 Difference]: Start difference. First operand 10251 states and 29887 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:46,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:43:46,767 INFO L93 Difference]: Finished difference Result 11083 states and 32319 transitions. [2020-12-17 20:43:46,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-17 20:43:46,768 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 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 41 [2020-12-17 20:43:46,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:43:46,771 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2020-12-17 20:43:46,771 INFO L78 Accepts]: Start accepts. Automaton has 11083 states and 32319 transitions. Word has length 41 [2020-12-17 20:43:46,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:43:46,772 INFO L481 AbstractCegarLoop]: Abstraction has 11083 states and 32319 transitions. [2020-12-17 20:43:46,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:46,776 INFO L276 IsEmpty]: Start isEmpty. Operand 11083 states and 32319 transitions. [2020-12-17 20:43:46,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-17 20:43:46,795 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:43:46,795 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] [2020-12-17 20:43:47,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-12-17 20:43:47,010 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:43:47,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:43:47,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1854918631, now seen corresponding path program 1 times [2020-12-17 20:43:47,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:43:47,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510620291] [2020-12-17 20:43:47,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:43:47,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:43:47,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:47,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510620291] [2020-12-17 20:43:47,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952533424] [2020-12-17 20:43:47,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:43:47,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:43:47,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-17 20:43:47,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:43:47,354 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:43:47,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:47,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:43:47,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-17 20:43:47,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748854682] [2020-12-17 20:43:47,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-17 20:43:47,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:43:47,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-17 20:43:47,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-12-17 20:43:47,365 INFO L87 Difference]: Start difference. First operand 11083 states and 32319 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:47,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:43:47,760 INFO L93 Difference]: Finished difference Result 12939 states and 37759 transitions. [2020-12-17 20:43:47,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-17 20:43:47,761 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 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 41 [2020-12-17 20:43:47,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:43:47,762 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-12-17 20:43:47,762 INFO L78 Accepts]: Start accepts. Automaton has 12939 states and 37759 transitions. Word has length 41 [2020-12-17 20:43:47,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:43:47,764 INFO L481 AbstractCegarLoop]: Abstraction has 12939 states and 37759 transitions. [2020-12-17 20:43:47,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:47,765 INFO L276 IsEmpty]: Start isEmpty. Operand 12939 states and 37759 transitions. [2020-12-17 20:43:47,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-17 20:43:47,780 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:43:47,781 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] [2020-12-17 20:43:47,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:43:47,996 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:43:47,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:43:47,997 INFO L82 PathProgramCache]: Analyzing trace with hash 467840107, now seen corresponding path program 2 times [2020-12-17 20:43:47,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:43:47,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424428929] [2020-12-17 20:43:47,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:43:48,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:43:48,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:48,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424428929] [2020-12-17 20:43:48,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267796758] [2020-12-17 20:43:48,144 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 [2020-12-17 20:43:48,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-17 20:43:48,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:43:48,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-17 20:43:48,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:43:48,264 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:43:48,315 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:43:48,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:48,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:43:48,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-12-17 20:43:48,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057904674] [2020-12-17 20:43:48,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-17 20:43:48,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:43:48,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-17 20:43:48,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-12-17 20:43:48,326 INFO L87 Difference]: Start difference. First operand 12939 states and 37759 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:48,785 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-12-17 20:43:48,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:43:48,962 INFO L93 Difference]: Finished difference Result 15179 states and 44287 transitions. [2020-12-17 20:43:48,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-17 20:43:48,963 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 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 41 [2020-12-17 20:43:48,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:43:48,964 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2020-12-17 20:43:48,964 INFO L78 Accepts]: Start accepts. Automaton has 15179 states and 44287 transitions. Word has length 41 [2020-12-17 20:43:48,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:43:48,965 INFO L481 AbstractCegarLoop]: Abstraction has 15179 states and 44287 transitions. [2020-12-17 20:43:48,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:48,965 INFO L276 IsEmpty]: Start isEmpty. Operand 15179 states and 44287 transitions. [2020-12-17 20:43:48,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-17 20:43:48,986 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:43:48,987 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] [2020-12-17 20:43:49,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-17 20:43:49,201 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:43:49,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:43:49,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1873860069, now seen corresponding path program 3 times [2020-12-17 20:43:49,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:43:49,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004139638] [2020-12-17 20:43:49,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:43:49,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:43:49,396 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:49,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004139638] [2020-12-17 20:43:49,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822473621] [2020-12-17 20:43:49,398 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 [2020-12-17 20:43:49,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-17 20:43:49,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:43:49,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-17 20:43:49,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:43:49,570 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:43:49,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:49,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:43:49,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-17 20:43:49,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634235366] [2020-12-17 20:43:49,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-17 20:43:49,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:43:49,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-17 20:43:49,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-12-17 20:43:49,584 INFO L87 Difference]: Start difference. First operand 15179 states and 44287 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:50,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:43:50,216 INFO L93 Difference]: Finished difference Result 18315 states and 53503 transitions. [2020-12-17 20:43:50,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-17 20:43:50,217 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 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 41 [2020-12-17 20:43:50,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:43:50,218 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2020-12-17 20:43:50,218 INFO L78 Accepts]: Start accepts. Automaton has 18315 states and 53503 transitions. Word has length 41 [2020-12-17 20:43:50,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:43:50,219 INFO L481 AbstractCegarLoop]: Abstraction has 18315 states and 53503 transitions. [2020-12-17 20:43:50,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:50,219 INFO L276 IsEmpty]: Start isEmpty. Operand 18315 states and 53503 transitions. [2020-12-17 20:43:50,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-17 20:43:50,234 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:43:50,234 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] [2020-12-17 20:43:50,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:43:50,445 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:43:50,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:43:50,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1870886839, now seen corresponding path program 4 times [2020-12-17 20:43:50,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:43:50,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669156347] [2020-12-17 20:43:50,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:43:50,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:43:50,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:50,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669156347] [2020-12-17 20:43:50,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912798712] [2020-12-17 20:43:50,601 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:43:50,662 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-17 20:43:50,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:43:50,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-17 20:43:50,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:43:50,692 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:43:50,716 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:43:50,722 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:50,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:43:50,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-12-17 20:43:50,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382362625] [2020-12-17 20:43:50,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-17 20:43:50,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:43:50,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-17 20:43:50,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-12-17 20:43:50,725 INFO L87 Difference]: Start difference. First operand 18315 states and 53503 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:51,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:43:51,400 INFO L93 Difference]: Finished difference Result 19659 states and 57343 transitions. [2020-12-17 20:43:51,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-17 20:43:51,401 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 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 41 [2020-12-17 20:43:51,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:43:51,402 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=187, Invalid=463, Unknown=0, NotChecked=0, Total=650 [2020-12-17 20:43:51,402 INFO L78 Accepts]: Start accepts. Automaton has 19659 states and 57343 transitions. Word has length 41 [2020-12-17 20:43:51,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:43:51,402 INFO L481 AbstractCegarLoop]: Abstraction has 19659 states and 57343 transitions. [2020-12-17 20:43:51,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:51,403 INFO L276 IsEmpty]: Start isEmpty. Operand 19659 states and 57343 transitions. [2020-12-17 20:43:51,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-17 20:43:51,420 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:43:51,420 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] [2020-12-17 20:43:51,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-17 20:43:51,621 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:43:51,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:43:51,622 INFO L82 PathProgramCache]: Analyzing trace with hash 697126713, now seen corresponding path program 1 times [2020-12-17 20:43:51,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:43:51,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884575448] [2020-12-17 20:43:51,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:43:51,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:43:51,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:51,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884575448] [2020-12-17 20:43:51,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043680909] [2020-12-17 20:43:51,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:43:51,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:43:51,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-17 20:43:51,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:43:51,884 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:43:51,895 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:51,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:43:51,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-12-17 20:43:51,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103225862] [2020-12-17 20:43:51,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-17 20:43:51,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:43:51,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-17 20:43:51,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-12-17 20:43:51,901 INFO L87 Difference]: Start difference. First operand 19659 states and 57343 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:52,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:43:52,409 INFO L93 Difference]: Finished difference Result 21515 states and 62783 transitions. [2020-12-17 20:43:52,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-17 20:43:52,410 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 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 46 [2020-12-17 20:43:52,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:43:52,411 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-12-17 20:43:52,411 INFO L78 Accepts]: Start accepts. Automaton has 21515 states and 62783 transitions. Word has length 46 [2020-12-17 20:43:52,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:43:52,411 INFO L481 AbstractCegarLoop]: Abstraction has 21515 states and 62783 transitions. [2020-12-17 20:43:52,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:52,412 INFO L276 IsEmpty]: Start isEmpty. Operand 21515 states and 62783 transitions. [2020-12-17 20:43:52,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-17 20:43:52,437 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:43:52,437 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] [2020-12-17 20:43:52,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:43:52,653 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:43:52,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:43:52,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1275081845, now seen corresponding path program 2 times [2020-12-17 20:43:52,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:43:52,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234897753] [2020-12-17 20:43:52,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:43:52,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:43:52,788 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:52,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234897753] [2020-12-17 20:43:52,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067384874] [2020-12-17 20:43:52,789 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:43:52,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-17 20:43:52,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:43:52,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-17 20:43:52,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:43:52,877 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:43:52,895 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:43:52,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:52,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:43:52,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-17 20:43:52,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480278580] [2020-12-17 20:43:52,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-17 20:43:52,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:43:52,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-17 20:43:52,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-12-17 20:43:52,908 INFO L87 Difference]: Start difference. First operand 21515 states and 62783 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:53,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:43:53,587 INFO L93 Difference]: Finished difference Result 23755 states and 69311 transitions. [2020-12-17 20:43:53,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-17 20:43:53,588 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 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 46 [2020-12-17 20:43:53,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:43:53,589 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-12-17 20:43:53,589 INFO L78 Accepts]: Start accepts. Automaton has 23755 states and 69311 transitions. Word has length 46 [2020-12-17 20:43:53,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:43:53,590 INFO L481 AbstractCegarLoop]: Abstraction has 23755 states and 69311 transitions. [2020-12-17 20:43:53,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:53,590 INFO L276 IsEmpty]: Start isEmpty. Operand 23755 states and 69311 transitions. [2020-12-17 20:43:53,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-17 20:43:53,612 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:43:53,612 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] [2020-12-17 20:43:53,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-17 20:43:53,819 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:43:53,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:43:53,821 INFO L82 PathProgramCache]: Analyzing trace with hash 130938117, now seen corresponding path program 3 times [2020-12-17 20:43:53,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:43:53,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930035213] [2020-12-17 20:43:53,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:43:53,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:43:53,969 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:53,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930035213] [2020-12-17 20:43:53,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916684877] [2020-12-17 20:43:53,970 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:43:54,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-17 20:43:54,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:43:54,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-17 20:43:54,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:43:54,081 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:43:54,091 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:54,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:43:54,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-12-17 20:43:54,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343076392] [2020-12-17 20:43:54,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-17 20:43:54,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:43:54,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-17 20:43:54,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-12-17 20:43:54,094 INFO L87 Difference]: Start difference. First operand 23755 states and 69311 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:54,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:43:54,763 INFO L93 Difference]: Finished difference Result 26891 states and 78527 transitions. [2020-12-17 20:43:54,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-17 20:43:54,764 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 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 46 [2020-12-17 20:43:54,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:43:54,765 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2020-12-17 20:43:54,765 INFO L78 Accepts]: Start accepts. Automaton has 26891 states and 78527 transitions. Word has length 46 [2020-12-17 20:43:54,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:43:54,766 INFO L481 AbstractCegarLoop]: Abstraction has 26891 states and 78527 transitions. [2020-12-17 20:43:54,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:54,766 INFO L276 IsEmpty]: Start isEmpty. Operand 26891 states and 78527 transitions. [2020-12-17 20:43:54,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-17 20:43:54,784 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:43:54,784 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] [2020-12-17 20:43:54,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-17 20:43:54,986 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:43:54,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:43:54,987 INFO L82 PathProgramCache]: Analyzing trace with hash 127964887, now seen corresponding path program 4 times [2020-12-17 20:43:54,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:43:54,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128410381] [2020-12-17 20:43:54,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:43:55,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:43:55,125 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:55,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128410381] [2020-12-17 20:43:55,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582989786] [2020-12-17 20:43:55,126 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:43:55,187 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-17 20:43:55,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:43:55,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-17 20:43:55,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:43:55,230 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:43:55,261 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:43:55,269 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:55,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:43:55,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-17 20:43:55,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075864860] [2020-12-17 20:43:55,270 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-17 20:43:55,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:43:55,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-17 20:43:55,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-12-17 20:43:55,272 INFO L87 Difference]: Start difference. First operand 26891 states and 78527 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:55,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:43:55,922 INFO L93 Difference]: Finished difference Result 26955 states and 78655 transitions. [2020-12-17 20:43:55,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-17 20:43:55,923 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 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 46 [2020-12-17 20:43:55,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:43:55,924 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=201, Invalid=449, Unknown=0, NotChecked=0, Total=650 [2020-12-17 20:43:55,924 INFO L78 Accepts]: Start accepts. Automaton has 26955 states and 78655 transitions. Word has length 46 [2020-12-17 20:43:55,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:43:55,925 INFO L481 AbstractCegarLoop]: Abstraction has 26955 states and 78655 transitions. [2020-12-17 20:43:55,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:55,925 INFO L276 IsEmpty]: Start isEmpty. Operand 26955 states and 78655 transitions. [2020-12-17 20:43:55,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-17 20:43:55,952 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:43:55,952 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] [2020-12-17 20:43:56,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-17 20:43:56,153 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:43:56,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:43:56,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1328082230, now seen corresponding path program 5 times [2020-12-17 20:43:56,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:43:56,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716274664] [2020-12-17 20:43:56,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:43:56,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:43:56,286 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:56,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716274664] [2020-12-17 20:43:56,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944194739] [2020-12-17 20:43:56,287 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:43:56,353 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-17 20:43:56,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:43:56,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-17 20:43:56,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:43:56,404 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:43:56,413 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:56,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:43:56,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-17 20:43:56,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727271036] [2020-12-17 20:43:56,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-17 20:43:56,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:43:56,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-17 20:43:56,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-12-17 20:43:56,416 INFO L87 Difference]: Start difference. First operand 26955 states and 78655 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:56,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:43:56,986 INFO L93 Difference]: Finished difference Result 28939 states and 84479 transitions. [2020-12-17 20:43:56,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-17 20:43:56,987 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 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 51 [2020-12-17 20:43:56,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:43:56,988 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-12-17 20:43:56,988 INFO L78 Accepts]: Start accepts. Automaton has 28939 states and 84479 transitions. Word has length 51 [2020-12-17 20:43:56,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:43:56,988 INFO L481 AbstractCegarLoop]: Abstraction has 28939 states and 84479 transitions. [2020-12-17 20:43:56,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:56,988 INFO L276 IsEmpty]: Start isEmpty. Operand 28939 states and 84479 transitions. [2020-12-17 20:43:57,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-17 20:43:57,027 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:43:57,027 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] [2020-12-17 20:43:57,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-17 20:43:57,241 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:43:57,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:43:57,242 INFO L82 PathProgramCache]: Analyzing trace with hash -861941604, now seen corresponding path program 6 times [2020-12-17 20:43:57,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:43:57,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854929016] [2020-12-17 20:43:57,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:43:57,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:43:57,387 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:57,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854929016] [2020-12-17 20:43:57,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376888033] [2020-12-17 20:43:57,387 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:43:57,454 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-17 20:43:57,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:43:57,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-17 20:43:57,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:43:57,480 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:43:57,518 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:43:57,526 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:57,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:43:57,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2020-12-17 20:43:57,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032624722] [2020-12-17 20:43:57,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-17 20:43:57,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:43:57,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-17 20:43:57,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-12-17 20:43:57,529 INFO L87 Difference]: Start difference. First operand 28939 states and 84479 transitions. Second operand has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:57,841 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 13 [2020-12-17 20:43:58,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:43:58,319 INFO L93 Difference]: Finished difference Result 30667 states and 89535 transitions. [2020-12-17 20:43:58,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-17 20:43:58,320 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 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 51 [2020-12-17 20:43:58,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:43:58,321 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=194, Invalid=508, Unknown=0, NotChecked=0, Total=702 [2020-12-17 20:43:58,321 INFO L78 Accepts]: Start accepts. Automaton has 30667 states and 89535 transitions. Word has length 51 [2020-12-17 20:43:58,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:43:58,321 INFO L481 AbstractCegarLoop]: Abstraction has 30667 states and 89535 transitions. [2020-12-17 20:43:58,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:58,321 INFO L276 IsEmpty]: Start isEmpty. Operand 30667 states and 89535 transitions. [2020-12-17 20:43:58,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-17 20:43:58,359 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:43:58,359 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] [2020-12-17 20:43:58,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-17 20:43:58,575 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:43:58,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:43:58,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1106515018, now seen corresponding path program 7 times [2020-12-17 20:43:58,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:43:58,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17704907] [2020-12-17 20:43:58,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:43:58,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:43:58,708 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:58,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17704907] [2020-12-17 20:43:58,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202925378] [2020-12-17 20:43:58,709 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:43:58,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:43:58,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-17 20:43:58,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:43:58,838 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:43:58,964 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:43:58,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:43:58,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-17 20:43:58,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946757002] [2020-12-17 20:43:58,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-17 20:43:58,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:43:58,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-17 20:43:58,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-12-17 20:43:58,972 INFO L87 Difference]: Start difference. First operand 30667 states and 89535 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:59,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:43:59,511 INFO L93 Difference]: Finished difference Result 32395 states and 94591 transitions. [2020-12-17 20:43:59,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-17 20:43:59,512 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 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 51 [2020-12-17 20:43:59,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:43:59,512 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=194, Invalid=508, Unknown=0, NotChecked=0, Total=702 [2020-12-17 20:43:59,512 INFO L78 Accepts]: Start accepts. Automaton has 32395 states and 94591 transitions. Word has length 51 [2020-12-17 20:43:59,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:43:59,513 INFO L481 AbstractCegarLoop]: Abstraction has 32395 states and 94591 transitions. [2020-12-17 20:43:59,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:43:59,513 INFO L276 IsEmpty]: Start isEmpty. Operand 32395 states and 94591 transitions. [2020-12-17 20:43:59,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-17 20:43:59,543 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:43:59,543 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] [2020-12-17 20:43:59,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:43:59,759 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:43:59,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:43:59,760 INFO L82 PathProgramCache]: Analyzing trace with hash -186912122, now seen corresponding path program 8 times [2020-12-17 20:43:59,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:43:59,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24308918] [2020-12-17 20:43:59,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:43:59,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:44:00,025 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:00,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24308918] [2020-12-17 20:44:00,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938835672] [2020-12-17 20:44:00,026 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:44:00,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-17 20:44:00,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:44:00,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-17 20:44:00,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:44:00,107 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:44:00,147 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:44:00,157 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:00,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:44:00,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2020-12-17 20:44:00,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124852724] [2020-12-17 20:44:00,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-17 20:44:00,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:44:00,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-17 20:44:00,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-12-17 20:44:00,160 INFO L87 Difference]: Start difference. First operand 32395 states and 94591 transitions. Second operand has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:01,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:44:01,115 INFO L93 Difference]: Finished difference Result 37627 states and 109847 transitions. [2020-12-17 20:44:01,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-17 20:44:01,115 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 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 51 [2020-12-17 20:44:01,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:44:01,116 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=251, Invalid=619, Unknown=0, NotChecked=0, Total=870 [2020-12-17 20:44:01,116 INFO L78 Accepts]: Start accepts. Automaton has 37627 states and 109847 transitions. Word has length 51 [2020-12-17 20:44:01,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:44:01,117 INFO L481 AbstractCegarLoop]: Abstraction has 37627 states and 109847 transitions. [2020-12-17 20:44:01,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:01,117 INFO L276 IsEmpty]: Start isEmpty. Operand 37627 states and 109847 transitions. [2020-12-17 20:44:01,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-17 20:44:01,148 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:44:01,148 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] [2020-12-17 20:44:01,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2020-12-17 20:44:01,363 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:44:01,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:44:01,363 INFO L82 PathProgramCache]: Analyzing trace with hash 165163796, now seen corresponding path program 9 times [2020-12-17 20:44:01,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:44:01,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485152639] [2020-12-17 20:44:01,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:44:01,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:44:01,476 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:01,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485152639] [2020-12-17 20:44:01,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106999782] [2020-12-17 20:44:01,477 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:44:01,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-17 20:44:01,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:44:01,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-17 20:44:01,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:44:01,575 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:44:01,583 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:01,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:44:01,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-17 20:44:01,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568147224] [2020-12-17 20:44:01,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-17 20:44:01,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:44:01,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-17 20:44:01,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-12-17 20:44:01,585 INFO L87 Difference]: Start difference. First operand 37627 states and 109847 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:02,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:44:02,308 INFO L93 Difference]: Finished difference Result 40891 states and 119447 transitions. [2020-12-17 20:44:02,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-17 20:44:02,308 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 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 51 [2020-12-17 20:44:02,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:44:02,309 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2020-12-17 20:44:02,309 INFO L78 Accepts]: Start accepts. Automaton has 40891 states and 119447 transitions. Word has length 51 [2020-12-17 20:44:02,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:44:02,309 INFO L481 AbstractCegarLoop]: Abstraction has 40891 states and 119447 transitions. [2020-12-17 20:44:02,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:02,309 INFO L276 IsEmpty]: Start isEmpty. Operand 40891 states and 119447 transitions. [2020-12-17 20:44:02,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-17 20:44:02,343 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:44:02,344 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] [2020-12-17 20:44:02,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:44:02,545 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:44:02,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:44:02,546 INFO L82 PathProgramCache]: Analyzing trace with hash 162190566, now seen corresponding path program 10 times [2020-12-17 20:44:02,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:44:02,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092288759] [2020-12-17 20:44:02,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:44:02,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:44:02,676 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:02,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092288759] [2020-12-17 20:44:02,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099105384] [2020-12-17 20:44:02,677 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:44:02,754 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-17 20:44:02,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:44:02,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-17 20:44:02,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:44:02,782 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:44:02,796 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:44:02,813 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:02,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:44:02,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-17 20:44:02,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332330971] [2020-12-17 20:44:02,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-17 20:44:02,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:44:02,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-17 20:44:02,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-12-17 20:44:02,817 INFO L87 Difference]: Start difference. First operand 40891 states and 119447 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:03,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:44:03,740 INFO L93 Difference]: Finished difference Result 40955 states and 119575 transitions. [2020-12-17 20:44:03,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-17 20:44:03,740 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 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 51 [2020-12-17 20:44:03,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:44:03,741 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=262, Invalid=608, Unknown=0, NotChecked=0, Total=870 [2020-12-17 20:44:03,741 INFO L78 Accepts]: Start accepts. Automaton has 40955 states and 119575 transitions. Word has length 51 [2020-12-17 20:44:03,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:44:03,742 INFO L481 AbstractCegarLoop]: Abstraction has 40955 states and 119575 transitions. [2020-12-17 20:44:03,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:03,742 INFO L276 IsEmpty]: Start isEmpty. Operand 40955 states and 119575 transitions. [2020-12-17 20:44:03,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-17 20:44:03,788 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:44:03,788 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] [2020-12-17 20:44:03,988 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-17 20:44:03,989 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:44:03,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:44:03,990 INFO L82 PathProgramCache]: Analyzing trace with hash -688928278, now seen corresponding path program 11 times [2020-12-17 20:44:03,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:44:03,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865877972] [2020-12-17 20:44:03,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:44:04,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:44:04,140 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:04,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865877972] [2020-12-17 20:44:04,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768481733] [2020-12-17 20:44:04,140 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:44:04,195 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-17 20:44:04,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:44:04,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-17 20:44:04,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:44:04,218 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:44:04,233 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:04,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:44:04,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-12-17 20:44:04,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209356141] [2020-12-17 20:44:04,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-17 20:44:04,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:44:04,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-17 20:44:04,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-12-17 20:44:04,240 INFO L87 Difference]: Start difference. First operand 40955 states and 119575 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:04,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:44:04,963 INFO L93 Difference]: Finished difference Result 43067 states and 125783 transitions. [2020-12-17 20:44:04,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-17 20:44:04,964 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 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 56 [2020-12-17 20:44:04,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:44:04,965 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=190, Invalid=460, Unknown=0, NotChecked=0, Total=650 [2020-12-17 20:44:04,965 INFO L78 Accepts]: Start accepts. Automaton has 43067 states and 125783 transitions. Word has length 56 [2020-12-17 20:44:04,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:44:04,966 INFO L481 AbstractCegarLoop]: Abstraction has 43067 states and 125783 transitions. [2020-12-17 20:44:04,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:04,966 INFO L276 IsEmpty]: Start isEmpty. Operand 43067 states and 125783 transitions. [2020-12-17 20:44:05,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-17 20:44:05,019 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:44:05,020 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] [2020-12-17 20:44:05,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:44:05,234 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:44:05,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:44:05,235 INFO L82 PathProgramCache]: Analyzing trace with hash -222787652, now seen corresponding path program 12 times [2020-12-17 20:44:05,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:44:05,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160011828] [2020-12-17 20:44:05,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:44:05,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:44:05,424 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:05,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160011828] [2020-12-17 20:44:05,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564020944] [2020-12-17 20:44:05,425 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:44:05,488 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-17 20:44:05,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:44:05,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-17 20:44:05,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:44:05,514 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:44:05,542 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:44:05,553 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:05,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:44:05,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-17 20:44:05,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660516553] [2020-12-17 20:44:05,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-17 20:44:05,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:44:05,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-17 20:44:05,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-12-17 20:44:05,560 INFO L87 Difference]: Start difference. First operand 43067 states and 125783 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 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) [2020-12-17 20:44:06,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:44:06,560 INFO L93 Difference]: Finished difference Result 44795 states and 130839 transitions. [2020-12-17 20:44:06,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-17 20:44:06,561 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 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 56 [2020-12-17 20:44:06,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:44:06,562 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=265, Invalid=665, Unknown=0, NotChecked=0, Total=930 [2020-12-17 20:44:06,562 INFO L78 Accepts]: Start accepts. Automaton has 44795 states and 130839 transitions. Word has length 56 [2020-12-17 20:44:06,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:44:06,562 INFO L481 AbstractCegarLoop]: Abstraction has 44795 states and 130839 transitions. [2020-12-17 20:44:06,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 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) [2020-12-17 20:44:06,563 INFO L276 IsEmpty]: Start isEmpty. Operand 44795 states and 130839 transitions. [2020-12-17 20:44:06,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-17 20:44:06,622 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:44:06,622 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] [2020-12-17 20:44:06,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-17 20:44:06,835 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:44:06,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:44:06,836 INFO L82 PathProgramCache]: Analyzing trace with hash -467361066, now seen corresponding path program 13 times [2020-12-17 20:44:06,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:44:06,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17292293] [2020-12-17 20:44:06,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:44:06,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:44:06,976 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:06,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17292293] [2020-12-17 20:44:06,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942813432] [2020-12-17 20:44:06,977 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:44:07,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:44:07,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-17 20:44:07,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:44:07,327 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:44:07,342 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:07,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:44:07,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-12-17 20:44:07,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493466089] [2020-12-17 20:44:07,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-17 20:44:07,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:44:07,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-17 20:44:07,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-12-17 20:44:07,347 INFO L87 Difference]: Start difference. First operand 44795 states and 130839 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:08,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:44:08,058 INFO L93 Difference]: Finished difference Result 46523 states and 135895 transitions. [2020-12-17 20:44:08,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-17 20:44:08,059 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 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 56 [2020-12-17 20:44:08,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:44:08,060 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=217, Invalid=539, Unknown=0, NotChecked=0, Total=756 [2020-12-17 20:44:08,060 INFO L78 Accepts]: Start accepts. Automaton has 46523 states and 135895 transitions. Word has length 56 [2020-12-17 20:44:08,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:44:08,060 INFO L481 AbstractCegarLoop]: Abstraction has 46523 states and 135895 transitions. [2020-12-17 20:44:08,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:08,061 INFO L276 IsEmpty]: Start isEmpty. Operand 46523 states and 135895 transitions. [2020-12-17 20:44:08,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-17 20:44:08,108 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:44:08,108 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] [2020-12-17 20:44:08,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-17 20:44:08,314 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:44:08,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:44:08,315 INFO L82 PathProgramCache]: Analyzing trace with hash 452241830, now seen corresponding path program 14 times [2020-12-17 20:44:08,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:44:08,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728143535] [2020-12-17 20:44:08,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:44:08,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:44:08,476 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:08,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728143535] [2020-12-17 20:44:08,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416289822] [2020-12-17 20:44:08,476 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:44:08,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-17 20:44:08,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:44:08,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-17 20:44:08,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:44:08,585 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:44:08,620 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:44:08,633 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:08,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:44:08,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-17 20:44:08,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712733921] [2020-12-17 20:44:08,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-17 20:44:08,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:44:08,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-17 20:44:08,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-12-17 20:44:08,636 INFO L87 Difference]: Start difference. First operand 46523 states and 135895 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 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) [2020-12-17 20:44:09,356 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-12-17 20:44:09,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:44:09,653 INFO L93 Difference]: Finished difference Result 48635 states and 142039 transitions. [2020-12-17 20:44:09,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-17 20:44:09,653 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 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 56 [2020-12-17 20:44:09,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:44:09,654 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=300, Invalid=756, Unknown=0, NotChecked=0, Total=1056 [2020-12-17 20:44:09,654 INFO L78 Accepts]: Start accepts. Automaton has 48635 states and 142039 transitions. Word has length 56 [2020-12-17 20:44:09,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:44:09,654 INFO L481 AbstractCegarLoop]: Abstraction has 48635 states and 142039 transitions. [2020-12-17 20:44:09,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 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) [2020-12-17 20:44:09,655 INFO L276 IsEmpty]: Start isEmpty. Operand 48635 states and 142039 transitions. [2020-12-17 20:44:09,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-17 20:44:09,691 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:44:09,691 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] [2020-12-17 20:44:09,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-17 20:44:09,892 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:44:09,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:44:09,898 INFO L82 PathProgramCache]: Analyzing trace with hash 804317748, now seen corresponding path program 15 times [2020-12-17 20:44:09,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:44:09,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178198323] [2020-12-17 20:44:09,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:44:09,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:44:10,035 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:10,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178198323] [2020-12-17 20:44:10,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053915949] [2020-12-17 20:44:10,037 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:44:10,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-17 20:44:10,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:44:10,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-17 20:44:10,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:44:10,121 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:44:10,129 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:10,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:44:10,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-12-17 20:44:10,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145605971] [2020-12-17 20:44:10,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-17 20:44:10,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:44:10,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-17 20:44:10,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-12-17 20:44:10,132 INFO L87 Difference]: Start difference. First operand 48635 states and 142039 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:11,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:44:11,458 INFO L93 Difference]: Finished difference Result 51771 states and 151255 transitions. [2020-12-17 20:44:11,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-17 20:44:11,459 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 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 56 [2020-12-17 20:44:11,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:44:11,461 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2020-12-17 20:44:11,461 INFO L78 Accepts]: Start accepts. Automaton has 51771 states and 151255 transitions. Word has length 56 [2020-12-17 20:44:11,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:44:11,461 INFO L481 AbstractCegarLoop]: Abstraction has 51771 states and 151255 transitions. [2020-12-17 20:44:11,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:11,461 INFO L276 IsEmpty]: Start isEmpty. Operand 51771 states and 151255 transitions. [2020-12-17 20:44:11,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-17 20:44:11,519 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:44:11,520 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] [2020-12-17 20:44:11,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-17 20:44:11,734 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:44:11,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:44:11,735 INFO L82 PathProgramCache]: Analyzing trace with hash 801344518, now seen corresponding path program 16 times [2020-12-17 20:44:11,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:44:11,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748978367] [2020-12-17 20:44:11,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:44:11,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:44:11,897 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:11,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748978367] [2020-12-17 20:44:11,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198721659] [2020-12-17 20:44:11,898 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:44:11,980 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-17 20:44:11,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:44:11,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-17 20:44:11,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:44:12,031 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:44:12,065 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:44:12,078 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:12,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:44:12,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2020-12-17 20:44:12,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280389530] [2020-12-17 20:44:12,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-17 20:44:12,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:44:12,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-17 20:44:12,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-12-17 20:44:12,085 INFO L87 Difference]: Start difference. First operand 51771 states and 151255 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:13,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:44:13,484 INFO L93 Difference]: Finished difference Result 55227 states and 161239 transitions. [2020-12-17 20:44:13,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-17 20:44:13,485 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 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 56 [2020-12-17 20:44:13,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:44:13,486 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=404, Invalid=1002, Unknown=0, NotChecked=0, Total=1406 [2020-12-17 20:44:13,486 INFO L78 Accepts]: Start accepts. Automaton has 55227 states and 161239 transitions. Word has length 56 [2020-12-17 20:44:13,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:44:13,486 INFO L481 AbstractCegarLoop]: Abstraction has 55227 states and 161239 transitions. [2020-12-17 20:44:13,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:13,486 INFO L276 IsEmpty]: Start isEmpty. Operand 55227 states and 161239 transitions. [2020-12-17 20:44:13,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-17 20:44:13,534 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:44:13,534 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] [2020-12-17 20:44:13,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-17 20:44:13,735 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:44:13,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:44:13,736 INFO L82 PathProgramCache]: Analyzing trace with hash 548080699, now seen corresponding path program 17 times [2020-12-17 20:44:13,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:44:13,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251475565] [2020-12-17 20:44:13,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:44:13,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:44:13,949 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:13,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251475565] [2020-12-17 20:44:13,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806433855] [2020-12-17 20:44:13,950 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:44:14,012 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-17 20:44:14,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:44:14,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-17 20:44:14,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:44:14,032 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:44:14,042 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:14,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:44:14,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-12-17 20:44:14,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156346795] [2020-12-17 20:44:14,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-17 20:44:14,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:44:14,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-17 20:44:14,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-12-17 20:44:14,044 INFO L87 Difference]: Start difference. First operand 55227 states and 161239 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:14,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:44:14,715 INFO L93 Difference]: Finished difference Result 57339 states and 167447 transitions. [2020-12-17 20:44:14,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-17 20:44:14,715 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 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 61 [2020-12-17 20:44:14,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:44:14,716 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=525, Unknown=0, NotChecked=0, Total=756 [2020-12-17 20:44:14,717 INFO L78 Accepts]: Start accepts. Automaton has 57339 states and 167447 transitions. Word has length 61 [2020-12-17 20:44:14,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:44:14,717 INFO L481 AbstractCegarLoop]: Abstraction has 57339 states and 167447 transitions. [2020-12-17 20:44:14,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:14,718 INFO L276 IsEmpty]: Start isEmpty. Operand 57339 states and 167447 transitions. [2020-12-17 20:44:15,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-17 20:44:15,048 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:44:15,049 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] [2020-12-17 20:44:15,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:44:15,264 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:44:15,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:44:15,265 INFO L82 PathProgramCache]: Analyzing trace with hash 503720845, now seen corresponding path program 18 times [2020-12-17 20:44:15,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:44:15,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119722860] [2020-12-17 20:44:15,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:44:15,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:44:15,466 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:15,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119722860] [2020-12-17 20:44:15,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346594187] [2020-12-17 20:44:15,467 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:44:15,531 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-17 20:44:15,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:44:15,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-17 20:44:15,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:44:15,556 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:44:15,579 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:44:15,597 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:15,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:44:15,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-17 20:44:15,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099305421] [2020-12-17 20:44:15,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-17 20:44:15,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:44:15,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-17 20:44:15,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-12-17 20:44:15,600 INFO L87 Difference]: Start difference. First operand 57339 states and 167447 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:16,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:44:16,467 INFO L93 Difference]: Finished difference Result 59195 states and 172887 transitions. [2020-12-17 20:44:16,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-17 20:44:16,467 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 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 61 [2020-12-17 20:44:16,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:44:16,468 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=266, Invalid=726, Unknown=0, NotChecked=0, Total=992 [2020-12-17 20:44:16,468 INFO L78 Accepts]: Start accepts. Automaton has 59195 states and 172887 transitions. Word has length 61 [2020-12-17 20:44:16,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:44:16,469 INFO L481 AbstractCegarLoop]: Abstraction has 59195 states and 172887 transitions. [2020-12-17 20:44:16,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:16,469 INFO L276 IsEmpty]: Start isEmpty. Operand 59195 states and 172887 transitions. [2020-12-17 20:44:16,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-17 20:44:16,540 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:44:16,541 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] [2020-12-17 20:44:16,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:44:16,746 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:44:16,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:44:16,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1988537895, now seen corresponding path program 19 times [2020-12-17 20:44:16,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:44:16,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224529674] [2020-12-17 20:44:16,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:44:16,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:44:16,915 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:16,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224529674] [2020-12-17 20:44:16,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164337576] [2020-12-17 20:44:16,916 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:44:16,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:44:16,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-17 20:44:16,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:44:17,002 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:44:17,015 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:17,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:44:17,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-12-17 20:44:17,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616020319] [2020-12-17 20:44:17,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-17 20:44:17,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:44:17,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-17 20:44:17,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-12-17 20:44:17,017 INFO L87 Difference]: Start difference. First operand 59195 states and 172887 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:18,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:44:18,091 INFO L93 Difference]: Finished difference Result 61051 states and 178327 transitions. [2020-12-17 20:44:18,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-17 20:44:18,091 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 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 61 [2020-12-17 20:44:18,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:44:18,092 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=267, Invalid=725, Unknown=0, NotChecked=0, Total=992 [2020-12-17 20:44:18,093 INFO L78 Accepts]: Start accepts. Automaton has 61051 states and 178327 transitions. Word has length 61 [2020-12-17 20:44:18,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:44:18,093 INFO L481 AbstractCegarLoop]: Abstraction has 61051 states and 178327 transitions. [2020-12-17 20:44:18,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:18,093 INFO L276 IsEmpty]: Start isEmpty. Operand 61051 states and 178327 transitions. [2020-12-17 20:44:18,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-17 20:44:18,150 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:44:18,150 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] [2020-12-17 20:44:18,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:44:18,358 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:44:18,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:44:18,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1084722953, now seen corresponding path program 20 times [2020-12-17 20:44:18,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:44:18,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197223039] [2020-12-17 20:44:18,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:44:18,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:44:18,531 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:18,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197223039] [2020-12-17 20:44:18,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053028654] [2020-12-17 20:44:18,532 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:44:18,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-17 20:44:18,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:44:18,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-17 20:44:18,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:44:18,651 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:44:18,674 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:44:18,684 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:18,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:44:18,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-17 20:44:18,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682202047] [2020-12-17 20:44:18,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-17 20:44:18,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:44:18,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-17 20:44:18,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-12-17 20:44:18,687 INFO L87 Difference]: Start difference. First operand 61051 states and 178327 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:19,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:44:19,869 INFO L93 Difference]: Finished difference Result 64379 states and 188055 transitions. [2020-12-17 20:44:19,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-17 20:44:19,869 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 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 61 [2020-12-17 20:44:19,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:44:19,870 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=328, Invalid=862, Unknown=0, NotChecked=0, Total=1190 [2020-12-17 20:44:19,870 INFO L78 Accepts]: Start accepts. Automaton has 64379 states and 188055 transitions. Word has length 61 [2020-12-17 20:44:19,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:44:19,870 INFO L481 AbstractCegarLoop]: Abstraction has 64379 states and 188055 transitions. [2020-12-17 20:44:19,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:19,871 INFO L276 IsEmpty]: Start isEmpty. Operand 64379 states and 188055 transitions. [2020-12-17 20:44:19,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-17 20:44:19,919 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:44:19,919 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] [2020-12-17 20:44:20,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-12-17 20:44:20,121 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:44:20,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:44:20,121 INFO L82 PathProgramCache]: Analyzing trace with hash 2120210981, now seen corresponding path program 21 times [2020-12-17 20:44:20,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:44:20,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542403857] [2020-12-17 20:44:20,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:44:20,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:44:20,255 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:20,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542403857] [2020-12-17 20:44:20,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563711042] [2020-12-17 20:44:20,256 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:44:20,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-17 20:44:20,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:44:20,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-17 20:44:20,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:44:20,349 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:44:20,357 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:20,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:44:20,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-12-17 20:44:20,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635008319] [2020-12-17 20:44:20,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-17 20:44:20,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:44:20,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-17 20:44:20,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-12-17 20:44:20,360 INFO L87 Difference]: Start difference. First operand 64379 states and 188055 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:21,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:44:21,186 INFO L93 Difference]: Finished difference Result 66235 states and 193495 transitions. [2020-12-17 20:44:21,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-17 20:44:21,187 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 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 61 [2020-12-17 20:44:21,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:44:21,187 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=342, Invalid=848, Unknown=0, NotChecked=0, Total=1190 [2020-12-17 20:44:21,188 INFO L78 Accepts]: Start accepts. Automaton has 66235 states and 193495 transitions. Word has length 61 [2020-12-17 20:44:21,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:44:21,188 INFO L481 AbstractCegarLoop]: Abstraction has 66235 states and 193495 transitions. [2020-12-17 20:44:21,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:21,188 INFO L276 IsEmpty]: Start isEmpty. Operand 66235 states and 193495 transitions. [2020-12-17 20:44:21,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-17 20:44:21,621 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:44:21,621 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] [2020-12-17 20:44:21,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:44:21,834 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:44:21,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:44:21,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1255153419, now seen corresponding path program 22 times [2020-12-17 20:44:21,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:44:21,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163680907] [2020-12-17 20:44:21,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:44:21,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:44:21,984 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:21,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163680907] [2020-12-17 20:44:21,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810236448] [2020-12-17 20:44:21,984 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:44:22,049 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-17 20:44:22,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:44:22,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-17 20:44:22,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:44:22,075 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:44:22,088 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:44:22,097 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:22,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:44:22,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-17 20:44:22,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137216576] [2020-12-17 20:44:22,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-17 20:44:22,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:44:22,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-17 20:44:22,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-12-17 20:44:22,101 INFO L87 Difference]: Start difference. First operand 66235 states and 193495 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:23,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:44:23,097 INFO L93 Difference]: Finished difference Result 68475 states and 200023 transitions. [2020-12-17 20:44:23,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-17 20:44:23,098 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 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 61 [2020-12-17 20:44:23,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:44:23,099 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=372, Invalid=960, Unknown=0, NotChecked=0, Total=1332 [2020-12-17 20:44:23,099 INFO L78 Accepts]: Start accepts. Automaton has 68475 states and 200023 transitions. Word has length 61 [2020-12-17 20:44:23,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:44:23,099 INFO L481 AbstractCegarLoop]: Abstraction has 68475 states and 200023 transitions. [2020-12-17 20:44:23,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:23,099 INFO L276 IsEmpty]: Start isEmpty. Operand 68475 states and 200023 transitions. [2020-12-17 20:44:23,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-17 20:44:23,158 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:44:23,159 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] [2020-12-17 20:44:23,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-17 20:44:23,360 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:44:23,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:44:23,360 INFO L82 PathProgramCache]: Analyzing trace with hash -903077501, now seen corresponding path program 23 times [2020-12-17 20:44:23,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:44:23,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707912719] [2020-12-17 20:44:23,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:44:23,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:44:23,487 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:23,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707912719] [2020-12-17 20:44:23,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856425928] [2020-12-17 20:44:23,488 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:44:23,553 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-17 20:44:23,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:44:23,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-17 20:44:23,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:44:23,575 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:44:23,582 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:23,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:44:23,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-12-17 20:44:23,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391000735] [2020-12-17 20:44:23,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-17 20:44:23,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:44:23,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-17 20:44:23,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-12-17 20:44:23,585 INFO L87 Difference]: Start difference. First operand 68475 states and 200023 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:23,878 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2020-12-17 20:44:24,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:44:24,847 INFO L93 Difference]: Finished difference Result 71739 states and 209623 transitions. [2020-12-17 20:44:24,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-17 20:44:24,848 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 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 61 [2020-12-17 20:44:24,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:44:24,849 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=406, Invalid=926, Unknown=0, NotChecked=0, Total=1332 [2020-12-17 20:44:24,849 INFO L78 Accepts]: Start accepts. Automaton has 71739 states and 209623 transitions. Word has length 61 [2020-12-17 20:44:24,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:44:24,849 INFO L481 AbstractCegarLoop]: Abstraction has 71739 states and 209623 transitions. [2020-12-17 20:44:24,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:24,849 INFO L276 IsEmpty]: Start isEmpty. Operand 71739 states and 209623 transitions. [2020-12-17 20:44:24,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-17 20:44:24,921 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:44:24,921 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] [2020-12-17 20:44:25,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:44:25,123 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:44:25,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:44:25,124 INFO L82 PathProgramCache]: Analyzing trace with hash -906050731, now seen corresponding path program 24 times [2020-12-17 20:44:25,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:44:25,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484729401] [2020-12-17 20:44:25,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:44:25,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:44:25,290 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:25,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484729401] [2020-12-17 20:44:25,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557836777] [2020-12-17 20:44:25,291 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:44:25,356 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-17 20:44:25,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:44:25,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-17 20:44:25,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:44:25,422 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:44:25,432 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:25,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:44:25,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2020-12-17 20:44:25,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496353599] [2020-12-17 20:44:25,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-17 20:44:25,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:44:25,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-17 20:44:25,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-12-17 20:44:25,435 INFO L87 Difference]: Start difference. First operand 71739 states and 209623 transitions. Second operand has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 14 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) [2020-12-17 20:44:26,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:44:26,992 INFO L93 Difference]: Finished difference Result 75451 states and 220375 transitions. [2020-12-17 20:44:26,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-17 20:44:26,993 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 14 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 61 [2020-12-17 20:44:26,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:44:26,995 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=466, Invalid=1256, Unknown=0, NotChecked=0, Total=1722 [2020-12-17 20:44:26,995 INFO L78 Accepts]: Start accepts. Automaton has 75451 states and 220375 transitions. Word has length 61 [2020-12-17 20:44:26,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:44:26,995 INFO L481 AbstractCegarLoop]: Abstraction has 75451 states and 220375 transitions. [2020-12-17 20:44:26,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 14 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) [2020-12-17 20:44:26,996 INFO L276 IsEmpty]: Start isEmpty. Operand 75451 states and 220375 transitions. [2020-12-17 20:44:27,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-17 20:44:27,075 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:44:27,076 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 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] [2020-12-17 20:44:27,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-17 20:44:27,277 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:44:27,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:44:27,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1591649445, now seen corresponding path program 25 times [2020-12-17 20:44:27,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:44:27,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230708240] [2020-12-17 20:44:27,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:44:27,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:44:27,456 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:27,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230708240] [2020-12-17 20:44:27,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240907838] [2020-12-17 20:44:27,457 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:44:27,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:44:27,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-17 20:44:27,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:44:27,564 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:44:27,577 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:27,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:44:27,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-17 20:44:27,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134447124] [2020-12-17 20:44:27,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-17 20:44:27,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:44:27,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-17 20:44:27,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-12-17 20:44:27,580 INFO L87 Difference]: Start difference. First operand 75451 states and 220375 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:28,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:44:28,410 INFO L93 Difference]: Finished difference Result 77819 states and 227351 transitions. [2020-12-17 20:44:28,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-17 20:44:28,411 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 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 66 [2020-12-17 20:44:28,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:44:28,411 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=311, Invalid=745, Unknown=0, NotChecked=0, Total=1056 [2020-12-17 20:44:28,412 INFO L78 Accepts]: Start accepts. Automaton has 77819 states and 227351 transitions. Word has length 66 [2020-12-17 20:44:28,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:44:28,412 INFO L481 AbstractCegarLoop]: Abstraction has 77819 states and 227351 transitions. [2020-12-17 20:44:28,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:28,412 INFO L276 IsEmpty]: Start isEmpty. Operand 77819 states and 227351 transitions. [2020-12-17 20:44:28,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-17 20:44:28,945 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:44:28,946 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 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] [2020-12-17 20:44:29,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:44:29,161 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:44:29,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:44:29,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1636009299, now seen corresponding path program 26 times [2020-12-17 20:44:29,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:44:29,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894619405] [2020-12-17 20:44:29,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:44:29,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:44:29,348 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:29,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894619405] [2020-12-17 20:44:29,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449394794] [2020-12-17 20:44:29,349 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:44:29,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-17 20:44:29,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:44:29,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-17 20:44:29,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:44:29,440 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:44:29,484 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:44:29,498 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:29,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:44:29,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-12-17 20:44:29,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91681114] [2020-12-17 20:44:29,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-17 20:44:29,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:44:29,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-17 20:44:29,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-12-17 20:44:29,500 INFO L87 Difference]: Start difference. First operand 77819 states and 227351 transitions. Second operand has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:30,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:44:30,432 INFO L93 Difference]: Finished difference Result 79675 states and 232791 transitions. [2020-12-17 20:44:30,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-17 20:44:30,432 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 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 66 [2020-12-17 20:44:30,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:44:30,433 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=400, Invalid=1006, Unknown=0, NotChecked=0, Total=1406 [2020-12-17 20:44:30,433 INFO L78 Accepts]: Start accepts. Automaton has 79675 states and 232791 transitions. Word has length 66 [2020-12-17 20:44:30,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:44:30,434 INFO L481 AbstractCegarLoop]: Abstraction has 79675 states and 232791 transitions. [2020-12-17 20:44:30,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:30,434 INFO L276 IsEmpty]: Start isEmpty. Operand 79675 states and 232791 transitions. [2020-12-17 20:44:30,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-17 20:44:30,507 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:44:30,507 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 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] [2020-12-17 20:44:30,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-17 20:44:30,708 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:44:30,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:44:30,709 INFO L82 PathProgramCache]: Analyzing trace with hash -151192249, now seen corresponding path program 27 times [2020-12-17 20:44:30,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:44:30,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783726663] [2020-12-17 20:44:30,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:44:30,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:44:30,855 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:30,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783726663] [2020-12-17 20:44:30,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814656150] [2020-12-17 20:44:30,855 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:44:31,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-17 20:44:31,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:44:31,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-17 20:44:31,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:44:31,366 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:44:31,384 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:31,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:44:31,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-17 20:44:31,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292030596] [2020-12-17 20:44:31,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-17 20:44:31,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:44:31,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-17 20:44:31,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-12-17 20:44:31,387 INFO L87 Difference]: Start difference. First operand 79675 states and 232791 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:32,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:44:32,193 INFO L93 Difference]: Finished difference Result 81531 states and 238231 transitions. [2020-12-17 20:44:32,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-17 20:44:32,194 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 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 66 [2020-12-17 20:44:32,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:44:32,195 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=335, Invalid=855, Unknown=0, NotChecked=0, Total=1190 [2020-12-17 20:44:32,195 INFO L78 Accepts]: Start accepts. Automaton has 81531 states and 238231 transitions. Word has length 66 [2020-12-17 20:44:32,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:44:32,195 INFO L481 AbstractCegarLoop]: Abstraction has 81531 states and 238231 transitions. [2020-12-17 20:44:32,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:32,195 INFO L276 IsEmpty]: Start isEmpty. Operand 81531 states and 238231 transitions. [2020-12-17 20:44:32,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-17 20:44:32,275 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:44:32,275 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 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] [2020-12-17 20:44:32,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-17 20:44:32,476 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:44:32,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:44:32,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1070514199, now seen corresponding path program 28 times [2020-12-17 20:44:32,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:44:32,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294340938] [2020-12-17 20:44:32,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:44:32,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:44:32,621 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:32,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294340938] [2020-12-17 20:44:32,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005978461] [2020-12-17 20:44:32,621 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:44:32,680 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-17 20:44:32,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:44:32,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-17 20:44:32,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:44:32,711 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:44:32,750 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:44:32,759 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:32,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:44:32,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-12-17 20:44:32,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114831752] [2020-12-17 20:44:32,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-17 20:44:32,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:44:32,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-17 20:44:32,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-12-17 20:44:32,761 INFO L87 Difference]: Start difference. First operand 81531 states and 238231 transitions. Second operand has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:33,692 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-12-17 20:44:34,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:44:34,266 INFO L93 Difference]: Finished difference Result 83259 states and 243287 transitions. [2020-12-17 20:44:34,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-17 20:44:34,266 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 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 66 [2020-12-17 20:44:34,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:44:34,268 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=432, Invalid=1128, Unknown=0, NotChecked=0, Total=1560 [2020-12-17 20:44:34,268 INFO L78 Accepts]: Start accepts. Automaton has 83259 states and 243287 transitions. Word has length 66 [2020-12-17 20:44:34,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:44:34,268 INFO L481 AbstractCegarLoop]: Abstraction has 83259 states and 243287 transitions. [2020-12-17 20:44:34,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:34,268 INFO L276 IsEmpty]: Start isEmpty. Operand 83259 states and 243287 transitions. [2020-12-17 20:44:34,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-17 20:44:34,367 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:44:34,367 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 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] [2020-12-17 20:44:34,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-17 20:44:34,573 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:44:34,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:44:34,574 INFO L82 PathProgramCache]: Analyzing trace with hash -19519163, now seen corresponding path program 29 times [2020-12-17 20:44:34,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:44:34,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789189100] [2020-12-17 20:44:34,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:44:34,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:44:34,740 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:34,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789189100] [2020-12-17 20:44:34,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380290411] [2020-12-17 20:44:34,740 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:44:34,818 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-17 20:44:34,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:44:34,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-17 20:44:34,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:44:34,888 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:44:34,905 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:34,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:44:34,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-17 20:44:34,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532874790] [2020-12-17 20:44:34,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-17 20:44:34,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:44:34,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-17 20:44:34,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-12-17 20:44:34,908 INFO L87 Difference]: Start difference. First operand 83259 states and 243287 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:36,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:44:36,478 INFO L93 Difference]: Finished difference Result 85115 states and 248727 transitions. [2020-12-17 20:44:36,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-17 20:44:36,478 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 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 66 [2020-12-17 20:44:36,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:44:36,479 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=379, Invalid=953, Unknown=0, NotChecked=0, Total=1332 [2020-12-17 20:44:36,480 INFO L78 Accepts]: Start accepts. Automaton has 85115 states and 248727 transitions. Word has length 66 [2020-12-17 20:44:36,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:44:36,480 INFO L481 AbstractCegarLoop]: Abstraction has 85115 states and 248727 transitions. [2020-12-17 20:44:36,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:36,481 INFO L276 IsEmpty]: Start isEmpty. Operand 85115 states and 248727 transitions. [2020-12-17 20:44:36,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-17 20:44:36,593 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:44:36,594 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 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] [2020-12-17 20:44:36,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-12-17 20:44:36,809 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:44:36,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:44:36,810 INFO L82 PathProgramCache]: Analyzing trace with hash 900083733, now seen corresponding path program 30 times [2020-12-17 20:44:36,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:44:36,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217639478] [2020-12-17 20:44:36,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:44:36,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:44:36,963 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:36,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217639478] [2020-12-17 20:44:36,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338684865] [2020-12-17 20:44:36,964 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:44:37,021 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-17 20:44:37,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:44:37,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-17 20:44:37,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:44:37,078 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:44:37,085 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:37,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:44:37,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-12-17 20:44:37,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678207676] [2020-12-17 20:44:37,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-17 20:44:37,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:44:37,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-17 20:44:37,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-12-17 20:44:37,087 INFO L87 Difference]: Start difference. First operand 85115 states and 248727 transitions. Second operand has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:38,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:44:38,221 INFO L93 Difference]: Finished difference Result 87995 states and 257111 transitions. [2020-12-17 20:44:38,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-17 20:44:38,221 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 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 66 [2020-12-17 20:44:38,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:44:38,222 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=393, Invalid=1089, Unknown=0, NotChecked=0, Total=1482 [2020-12-17 20:44:38,222 INFO L78 Accepts]: Start accepts. Automaton has 87995 states and 257111 transitions. Word has length 66 [2020-12-17 20:44:38,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:44:38,223 INFO L481 AbstractCegarLoop]: Abstraction has 87995 states and 257111 transitions. [2020-12-17 20:44:38,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:38,223 INFO L276 IsEmpty]: Start isEmpty. Operand 87995 states and 257111 transitions. [2020-12-17 20:44:38,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-17 20:44:38,306 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:44:38,306 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 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] [2020-12-17 20:44:38,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:44:38,507 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:44:38,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:44:38,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1252159651, now seen corresponding path program 31 times [2020-12-17 20:44:38,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:44:38,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146341343] [2020-12-17 20:44:38,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:44:38,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:44:38,671 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:38,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146341343] [2020-12-17 20:44:38,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192084735] [2020-12-17 20:44:38,672 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:44:39,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:44:39,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-17 20:44:39,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:44:39,238 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:44:39,249 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:39,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:44:39,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-17 20:44:39,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155350612] [2020-12-17 20:44:39,251 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-17 20:44:39,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:44:39,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-17 20:44:39,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-12-17 20:44:39,253 INFO L87 Difference]: Start difference. First operand 87995 states and 257111 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:40,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:44:40,350 INFO L93 Difference]: Finished difference Result 91259 states and 266711 transitions. [2020-12-17 20:44:40,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-17 20:44:40,351 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 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 66 [2020-12-17 20:44:40,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:44:40,352 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=443, Invalid=1039, Unknown=0, NotChecked=0, Total=1482 [2020-12-17 20:44:40,352 INFO L78 Accepts]: Start accepts. Automaton has 91259 states and 266711 transitions. Word has length 66 [2020-12-17 20:44:40,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:44:40,353 INFO L481 AbstractCegarLoop]: Abstraction has 91259 states and 266711 transitions. [2020-12-17 20:44:40,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:40,353 INFO L276 IsEmpty]: Start isEmpty. Operand 91259 states and 266711 transitions. [2020-12-17 20:44:40,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-17 20:44:40,435 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:44:40,435 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 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] [2020-12-17 20:44:40,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-12-17 20:44:40,649 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:44:40,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:44:40,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1249186421, now seen corresponding path program 32 times [2020-12-17 20:44:40,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:44:40,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490012396] [2020-12-17 20:44:40,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:44:40,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:44:40,791 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:40,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490012396] [2020-12-17 20:44:40,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168799885] [2020-12-17 20:44:40,791 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 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 [2020-12-17 20:44:40,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-17 20:44:40,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:44:40,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-17 20:44:40,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:44:40,892 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:44:40,898 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:40,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:44:40,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-17 20:44:40,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219104153] [2020-12-17 20:44:40,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-17 20:44:40,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:44:40,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-17 20:44:40,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-12-17 20:44:40,901 INFO L87 Difference]: Start difference. First operand 91259 states and 266711 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:42,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:44:42,456 INFO L93 Difference]: Finished difference Result 91323 states and 266839 transitions. [2020-12-17 20:44:42,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-17 20:44:42,457 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 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 66 [2020-12-17 20:44:42,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:44:42,458 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=405, Invalid=1077, Unknown=0, NotChecked=0, Total=1482 [2020-12-17 20:44:42,458 INFO L78 Accepts]: Start accepts. Automaton has 91323 states and 266839 transitions. Word has length 66 [2020-12-17 20:44:42,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:44:42,458 INFO L481 AbstractCegarLoop]: Abstraction has 91323 states and 266839 transitions. [2020-12-17 20:44:42,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:42,459 INFO L276 IsEmpty]: Start isEmpty. Operand 91323 states and 266839 transitions. [2020-12-17 20:44:42,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-17 20:44:42,558 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:44:42,558 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2020-12-17 20:44:42,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-12-17 20:44:42,759 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:44:42,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:44:42,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1334750316, now seen corresponding path program 33 times [2020-12-17 20:44:42,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:44:42,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236339116] [2020-12-17 20:44:42,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:44:42,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:44:42,958 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:42,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236339116] [2020-12-17 20:44:42,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109519609] [2020-12-17 20:44:42,959 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 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 [2020-12-17 20:44:43,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-17 20:44:43,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:44:43,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-17 20:44:43,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:44:43,059 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:44:43,068 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:43,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:44:43,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-12-17 20:44:43,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275644011] [2020-12-17 20:44:43,069 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-17 20:44:43,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:44:43,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-17 20:44:43,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-12-17 20:44:43,070 INFO L87 Difference]: Start difference. First operand 91323 states and 266839 transitions. Second operand has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:44,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:44:44,443 INFO L93 Difference]: Finished difference Result 93563 states and 273431 transitions. [2020-12-17 20:44:44,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-17 20:44:44,444 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 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 71 [2020-12-17 20:44:44,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:44:44,445 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=341, Invalid=781, Unknown=0, NotChecked=0, Total=1122 [2020-12-17 20:44:44,445 INFO L78 Accepts]: Start accepts. Automaton has 93563 states and 273431 transitions. Word has length 71 [2020-12-17 20:44:44,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:44:44,445 INFO L481 AbstractCegarLoop]: Abstraction has 93563 states and 273431 transitions. [2020-12-17 20:44:44,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:44,446 INFO L276 IsEmpty]: Start isEmpty. Operand 93563 states and 273431 transitions. [2020-12-17 20:44:44,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-17 20:44:44,561 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:44:44,561 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2020-12-17 20:44:44,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:44:44,766 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:44:44,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:44:44,767 INFO L82 PathProgramCache]: Analyzing trace with hash -99594946, now seen corresponding path program 34 times [2020-12-17 20:44:44,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:44:44,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015846340] [2020-12-17 20:44:44,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:44:44,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:44:45,000 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:45,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015846340] [2020-12-17 20:44:45,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117663794] [2020-12-17 20:44:45,001 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 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 [2020-12-17 20:44:45,070 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-17 20:44:45,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:44:45,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-17 20:44:45,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:44:45,100 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:44:45,122 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:44:45,139 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:45,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:44:45,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-17 20:44:45,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036336045] [2020-12-17 20:44:45,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-17 20:44:45,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:44:45,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-17 20:44:45,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-12-17 20:44:45,141 INFO L87 Difference]: Start difference. First operand 93563 states and 273431 transitions. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:46,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:44:46,534 INFO L93 Difference]: Finished difference Result 95547 states and 279255 transitions. [2020-12-17 20:44:46,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-17 20:44:46,535 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 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 71 [2020-12-17 20:44:46,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:44:46,537 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=378, Invalid=1028, Unknown=0, NotChecked=0, Total=1406 [2020-12-17 20:44:46,537 INFO L78 Accepts]: Start accepts. Automaton has 95547 states and 279255 transitions. Word has length 71 [2020-12-17 20:44:46,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:44:46,537 INFO L481 AbstractCegarLoop]: Abstraction has 95547 states and 279255 transitions. [2020-12-17 20:44:46,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:46,538 INFO L276 IsEmpty]: Start isEmpty. Operand 95547 states and 279255 transitions. [2020-12-17 20:44:46,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-17 20:44:46,733 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:44:46,733 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2020-12-17 20:44:46,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-12-17 20:44:46,948 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:44:46,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:44:46,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1726601048, now seen corresponding path program 35 times [2020-12-17 20:44:46,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:44:46,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242587926] [2020-12-17 20:44:46,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:44:46,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:44:47,140 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:47,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242587926] [2020-12-17 20:44:47,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989217968] [2020-12-17 20:44:47,141 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 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 [2020-12-17 20:44:47,697 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-17 20:44:47,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:44:47,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-17 20:44:47,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:44:47,728 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:44:47,738 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:47,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:44:47,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-12-17 20:44:47,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780691841] [2020-12-17 20:44:47,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-17 20:44:47,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:44:47,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-17 20:44:47,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-12-17 20:44:47,749 INFO L87 Difference]: Start difference. First operand 95547 states and 279255 transitions. Second operand has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:48,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:44:48,724 INFO L93 Difference]: Finished difference Result 97531 states and 285079 transitions. [2020-12-17 20:44:48,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-17 20:44:48,724 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 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 71 [2020-12-17 20:44:48,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:44:48,725 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=377, Invalid=1029, Unknown=0, NotChecked=0, Total=1406 [2020-12-17 20:44:48,725 INFO L78 Accepts]: Start accepts. Automaton has 97531 states and 285079 transitions. Word has length 71 [2020-12-17 20:44:48,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:44:48,725 INFO L481 AbstractCegarLoop]: Abstraction has 97531 states and 285079 transitions. [2020-12-17 20:44:48,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:48,726 INFO L276 IsEmpty]: Start isEmpty. Operand 97531 states and 285079 transitions. [2020-12-17 20:44:48,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-17 20:44:48,823 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:44:48,823 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2020-12-17 20:44:49,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:44:49,024 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:44:49,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:44:49,025 INFO L82 PathProgramCache]: Analyzing trace with hash -406694360, now seen corresponding path program 36 times [2020-12-17 20:44:49,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:44:49,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952681361] [2020-12-17 20:44:49,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:44:49,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:44:49,212 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:49,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952681361] [2020-12-17 20:44:49,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266939714] [2020-12-17 20:44:49,213 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 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 [2020-12-17 20:44:49,279 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-17 20:44:49,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:44:49,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-17 20:44:49,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:44:49,305 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:44:49,330 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:44:49,343 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:49,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:44:49,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-17 20:44:49,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228903986] [2020-12-17 20:44:49,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-17 20:44:49,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:44:49,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-17 20:44:49,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-12-17 20:44:49,347 INFO L87 Difference]: Start difference. First operand 97531 states and 285079 transitions. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:50,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:44:50,869 INFO L93 Difference]: Finished difference Result 100987 states and 295191 transitions. [2020-12-17 20:44:50,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-17 20:44:50,870 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 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 71 [2020-12-17 20:44:50,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:44:50,871 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=446, Invalid=1194, Unknown=0, NotChecked=0, Total=1640 [2020-12-17 20:44:50,871 INFO L78 Accepts]: Start accepts. Automaton has 100987 states and 295191 transitions. Word has length 71 [2020-12-17 20:44:50,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:44:50,871 INFO L481 AbstractCegarLoop]: Abstraction has 100987 states and 295191 transitions. [2020-12-17 20:44:50,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:50,871 INFO L276 IsEmpty]: Start isEmpty. Operand 100987 states and 295191 transitions. [2020-12-17 20:44:50,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-17 20:44:50,975 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:44:50,975 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2020-12-17 20:44:51,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-12-17 20:44:51,176 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:44:51,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:44:51,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1483906518, now seen corresponding path program 37 times [2020-12-17 20:44:51,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:44:51,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636094368] [2020-12-17 20:44:51,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:44:51,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:44:51,355 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:51,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636094368] [2020-12-17 20:44:51,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108248012] [2020-12-17 20:44:51,356 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 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 [2020-12-17 20:44:51,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:44:51,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-17 20:44:51,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:44:51,469 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:44:51,479 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:51,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:44:51,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-12-17 20:44:51,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824784110] [2020-12-17 20:44:51,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-17 20:44:51,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:44:51,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-17 20:44:51,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-12-17 20:44:51,486 INFO L87 Difference]: Start difference. First operand 100987 states and 295191 transitions. Second operand has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:53,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:44:53,078 INFO L93 Difference]: Finished difference Result 102971 states and 301015 transitions. [2020-12-17 20:44:53,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-17 20:44:53,079 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 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 71 [2020-12-17 20:44:53,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:44:53,081 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=458, Invalid=1182, Unknown=0, NotChecked=0, Total=1640 [2020-12-17 20:44:53,081 INFO L78 Accepts]: Start accepts. Automaton has 102971 states and 301015 transitions. Word has length 71 [2020-12-17 20:44:53,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:44:53,084 INFO L481 AbstractCegarLoop]: Abstraction has 102971 states and 301015 transitions. [2020-12-17 20:44:53,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:53,084 INFO L276 IsEmpty]: Start isEmpty. Operand 102971 states and 301015 transitions. [2020-12-17 20:44:53,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-17 20:44:53,204 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:44:53,205 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2020-12-17 20:44:53,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-17 20:44:53,406 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:44:53,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:44:53,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1589354330, now seen corresponding path program 38 times [2020-12-17 20:44:53,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:44:53,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068311829] [2020-12-17 20:44:53,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:44:53,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:44:53,586 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:53,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068311829] [2020-12-17 20:44:53,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767930814] [2020-12-17 20:44:53,586 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 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 [2020-12-17 20:44:53,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-17 20:44:53,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:44:53,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-17 20:44:53,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:44:53,677 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:44:53,694 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:44:53,706 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:53,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:44:53,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-17 20:44:53,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529912477] [2020-12-17 20:44:53,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-17 20:44:53,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:44:53,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-17 20:44:53,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-12-17 20:44:53,710 INFO L87 Difference]: Start difference. First operand 102971 states and 301015 transitions. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:54,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:44:54,988 INFO L93 Difference]: Finished difference Result 104699 states and 306071 transitions. [2020-12-17 20:44:54,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-17 20:44:54,989 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 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 71 [2020-12-17 20:44:54,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:44:54,990 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=488, Invalid=1318, Unknown=0, NotChecked=0, Total=1806 [2020-12-17 20:44:54,990 INFO L78 Accepts]: Start accepts. Automaton has 104699 states and 306071 transitions. Word has length 71 [2020-12-17 20:44:54,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:44:54,990 INFO L481 AbstractCegarLoop]: Abstraction has 104699 states and 306071 transitions. [2020-12-17 20:44:54,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:54,991 INFO L276 IsEmpty]: Start isEmpty. Operand 104699 states and 306071 transitions. [2020-12-17 20:44:55,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-17 20:44:55,689 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:44:55,689 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2020-12-17 20:44:55,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-17 20:44:55,898 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:44:55,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:44:55,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1615579604, now seen corresponding path program 39 times [2020-12-17 20:44:55,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:44:55,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894939299] [2020-12-17 20:44:55,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:44:55,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:44:56,087 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:56,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894939299] [2020-12-17 20:44:56,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384242927] [2020-12-17 20:44:56,088 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 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 [2020-12-17 20:44:56,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-17 20:44:56,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:44:56,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-17 20:44:56,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:44:56,190 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:44:56,205 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:56,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:44:56,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-12-17 20:44:56,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380946064] [2020-12-17 20:44:56,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-17 20:44:56,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:44:56,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-17 20:44:56,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-12-17 20:44:56,207 INFO L87 Difference]: Start difference. First operand 104699 states and 306071 transitions. Second operand has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:57,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:44:57,527 INFO L93 Difference]: Finished difference Result 106555 states and 311511 transitions. [2020-12-17 20:44:57,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-17 20:44:57,528 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 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 71 [2020-12-17 20:44:57,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:44:57,528 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=520, Invalid=1286, Unknown=0, NotChecked=0, Total=1806 [2020-12-17 20:44:57,528 INFO L78 Accepts]: Start accepts. Automaton has 106555 states and 311511 transitions. Word has length 71 [2020-12-17 20:44:57,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:44:57,529 INFO L481 AbstractCegarLoop]: Abstraction has 106555 states and 311511 transitions. [2020-12-17 20:44:57,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:44:57,529 INFO L276 IsEmpty]: Start isEmpty. Operand 106555 states and 311511 transitions. [2020-12-17 20:44:57,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-17 20:44:57,655 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:44:57,656 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2020-12-17 20:44:57,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-12-17 20:44:57,857 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:44:57,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:44:57,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1759784796, now seen corresponding path program 40 times [2020-12-17 20:44:57,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:44:57,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860685733] [2020-12-17 20:44:57,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:44:57,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:44:58,045 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:58,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860685733] [2020-12-17 20:44:58,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491802626] [2020-12-17 20:44:58,046 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 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 [2020-12-17 20:44:58,109 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-17 20:44:58,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:44:58,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-17 20:44:58,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:44:58,147 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:44:58,163 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:44:58,179 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:44:58,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:44:58,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-17 20:44:58,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007726530] [2020-12-17 20:44:58,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-17 20:44:58,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:44:58,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-17 20:44:58,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-12-17 20:44:58,181 INFO L87 Difference]: Start difference. First operand 106555 states and 311511 transitions. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:45:00,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:45:00,100 INFO L93 Difference]: Finished difference Result 109627 states and 320471 transitions. [2020-12-17 20:45:00,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-17 20:45:00,103 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 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 71 [2020-12-17 20:45:00,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:45:00,104 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=550, Invalid=1430, Unknown=0, NotChecked=0, Total=1980 [2020-12-17 20:45:00,104 INFO L78 Accepts]: Start accepts. Automaton has 109627 states and 320471 transitions. Word has length 71 [2020-12-17 20:45:00,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:45:00,105 INFO L481 AbstractCegarLoop]: Abstraction has 109627 states and 320471 transitions. [2020-12-17 20:45:00,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:45:00,105 INFO L276 IsEmpty]: Start isEmpty. Operand 109627 states and 320471 transitions. [2020-12-17 20:45:00,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-17 20:45:00,215 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:45:00,215 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2020-12-17 20:45:00,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:45:00,416 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:45:00,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:45:00,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1407708878, now seen corresponding path program 41 times [2020-12-17 20:45:00,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:45:00,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628476050] [2020-12-17 20:45:00,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:45:00,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:45:00,570 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:45:00,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628476050] [2020-12-17 20:45:00,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147370781] [2020-12-17 20:45:00,571 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 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 [2020-12-17 20:45:00,630 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-17 20:45:00,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:45:00,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-17 20:45:00,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:45:00,663 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:45:00,672 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:45:00,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:45:00,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-12-17 20:45:00,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423088028] [2020-12-17 20:45:00,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-17 20:45:00,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:45:00,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-17 20:45:00,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-12-17 20:45:00,674 INFO L87 Difference]: Start difference. First operand 109627 states and 320471 transitions. Second operand has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:45:02,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:45:02,421 INFO L93 Difference]: Finished difference Result 112891 states and 330071 transitions. [2020-12-17 20:45:02,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-17 20:45:02,422 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 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 71 [2020-12-17 20:45:02,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:45:02,423 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=602, Invalid=1378, Unknown=0, NotChecked=0, Total=1980 [2020-12-17 20:45:02,423 INFO L78 Accepts]: Start accepts. Automaton has 112891 states and 330071 transitions. Word has length 71 [2020-12-17 20:45:02,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:45:02,423 INFO L481 AbstractCegarLoop]: Abstraction has 112891 states and 330071 transitions. [2020-12-17 20:45:02,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:45:02,424 INFO L276 IsEmpty]: Start isEmpty. Operand 112891 states and 330071 transitions. [2020-12-17 20:45:02,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-17 20:45:02,533 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:45:02,534 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2020-12-17 20:45:02,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2020-12-17 20:45:02,735 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:45:02,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:45:02,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1410682108, now seen corresponding path program 42 times [2020-12-17 20:45:02,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:45:02,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162433477] [2020-12-17 20:45:02,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:45:02,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:45:02,896 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:45:02,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162433477] [2020-12-17 20:45:02,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370542211] [2020-12-17 20:45:02,896 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 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 [2020-12-17 20:45:02,959 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-17 20:45:02,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:45:02,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-17 20:45:02,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:45:03,001 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:45:03,010 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:45:03,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:45:03,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-17 20:45:03,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879033899] [2020-12-17 20:45:03,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-17 20:45:03,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:45:03,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-17 20:45:03,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-12-17 20:45:03,012 INFO L87 Difference]: Start difference. First operand 112891 states and 330071 transitions. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:45:04,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:45:04,994 INFO L93 Difference]: Finished difference Result 113147 states and 330775 transitions. [2020-12-17 20:45:04,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-17 20:45:04,994 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 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 71 [2020-12-17 20:45:04,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:45:04,995 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=570, Invalid=1500, Unknown=0, NotChecked=0, Total=2070 [2020-12-17 20:45:04,995 INFO L78 Accepts]: Start accepts. Automaton has 113147 states and 330775 transitions. Word has length 71 [2020-12-17 20:45:04,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:45:04,995 INFO L481 AbstractCegarLoop]: Abstraction has 113147 states and 330775 transitions. [2020-12-17 20:45:04,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:45:04,995 INFO L276 IsEmpty]: Start isEmpty. Operand 113147 states and 330775 transitions. [2020-12-17 20:45:05,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-17 20:45:05,127 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:45:05,128 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 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] [2020-12-17 20:45:05,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:45:05,330 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:45:05,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:45:05,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1682215820, now seen corresponding path program 43 times [2020-12-17 20:45:05,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:45:05,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245246989] [2020-12-17 20:45:05,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:45:05,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:45:05,578 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:45:05,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245246989] [2020-12-17 20:45:05,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020933812] [2020-12-17 20:45:05,580 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 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 [2020-12-17 20:45:05,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:45:05,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-17 20:45:05,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:45:05,722 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:45:05,744 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:45:05,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:45:05,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-17 20:45:05,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038479790] [2020-12-17 20:45:05,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-17 20:45:05,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:45:05,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-17 20:45:05,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2020-12-17 20:45:05,750 INFO L87 Difference]: Start difference. First operand 113147 states and 330775 transitions. 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) [2020-12-17 20:45:06,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:45:06,946 INFO L93 Difference]: Finished difference Result 115771 states and 338519 transitions. [2020-12-17 20:45:06,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-17 20:45:06,947 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 76 [2020-12-17 20:45:06,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:45:06,947 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=436, Invalid=1046, Unknown=0, NotChecked=0, Total=1482 [2020-12-17 20:45:06,947 INFO L78 Accepts]: Start accepts. Automaton has 115771 states and 338519 transitions. Word has length 76 [2020-12-17 20:45:06,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:45:06,947 INFO L481 AbstractCegarLoop]: Abstraction has 115771 states and 338519 transitions. [2020-12-17 20:45:06,948 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) [2020-12-17 20:45:06,948 INFO L276 IsEmpty]: Start isEmpty. Operand 115771 states and 338519 transitions. [2020-12-17 20:45:07,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-17 20:45:07,679 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:45:07,679 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 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] [2020-12-17 20:45:07,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-12-17 20:45:07,893 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:45:07,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:45:07,893 INFO L82 PathProgramCache]: Analyzing trace with hash 247870558, now seen corresponding path program 44 times [2020-12-17 20:45:07,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:45:07,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959264427] [2020-12-17 20:45:07,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:45:07,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:45:08,159 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:45:08,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959264427] [2020-12-17 20:45:08,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813997589] [2020-12-17 20:45:08,166 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 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 [2020-12-17 20:45:08,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-17 20:45:08,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:45:08,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-17 20:45:08,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:45:08,271 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:45:08,319 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:45:08,339 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:45:08,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:45:08,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-12-17 20:45:08,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429794968] [2020-12-17 20:45:08,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-17 20:45:08,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:45:08,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-17 20:45:08,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-12-17 20:45:08,344 INFO L87 Difference]: Start difference. First operand 115771 states and 338519 transitions. Second operand has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:45:09,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:45:09,744 INFO L93 Difference]: Finished difference Result 117755 states and 344343 transitions. [2020-12-17 20:45:09,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-17 20:45:09,745 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 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 76 [2020-12-17 20:45:09,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:45:09,745 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=535, Invalid=1357, Unknown=0, NotChecked=0, Total=1892 [2020-12-17 20:45:09,745 INFO L78 Accepts]: Start accepts. Automaton has 117755 states and 344343 transitions. Word has length 76 [2020-12-17 20:45:09,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:45:09,746 INFO L481 AbstractCegarLoop]: Abstraction has 117755 states and 344343 transitions. [2020-12-17 20:45:09,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:45:09,746 INFO L276 IsEmpty]: Start isEmpty. Operand 117755 states and 344343 transitions. [2020-12-17 20:45:09,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-17 20:45:09,886 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:45:09,887 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 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] [2020-12-17 20:45:10,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-12-17 20:45:10,088 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:45:10,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:45:10,089 INFO L82 PathProgramCache]: Analyzing trace with hash 2074066552, now seen corresponding path program 45 times [2020-12-17 20:45:10,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:45:10,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136672075] [2020-12-17 20:45:10,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:45:10,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:45:10,308 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:45:10,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136672075] [2020-12-17 20:45:10,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374319211] [2020-12-17 20:45:10,309 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 [2020-12-17 20:45:10,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-17 20:45:10,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:45:10,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-17 20:45:10,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:45:10,435 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:45:10,449 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:45:10,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:45:10,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-17 20:45:10,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142008334] [2020-12-17 20:45:10,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-17 20:45:10,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:45:10,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-17 20:45:10,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-12-17 20:45:10,451 INFO L87 Difference]: Start difference. First operand 117755 states and 344343 transitions. 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) [2020-12-17 20:45:12,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:45:12,080 INFO L93 Difference]: Finished difference Result 119739 states and 350167 transitions. [2020-12-17 20:45:12,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-17 20:45:12,081 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 76 [2020-12-17 20:45:12,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:45:12,082 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=458, Invalid=1182, Unknown=0, NotChecked=0, Total=1640 [2020-12-17 20:45:12,082 INFO L78 Accepts]: Start accepts. Automaton has 119739 states and 350167 transitions. Word has length 76 [2020-12-17 20:45:12,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:45:12,083 INFO L481 AbstractCegarLoop]: Abstraction has 119739 states and 350167 transitions. [2020-12-17 20:45:12,083 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) [2020-12-17 20:45:12,083 INFO L276 IsEmpty]: Start isEmpty. Operand 119739 states and 350167 transitions. [2020-12-17 20:45:12,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-17 20:45:12,216 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:45:12,216 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 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] [2020-12-17 20:45:12,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:45:12,417 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:45:12,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:45:12,418 INFO L82 PathProgramCache]: Analyzing trace with hash -59228856, now seen corresponding path program 46 times [2020-12-17 20:45:12,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:45:12,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708707068] [2020-12-17 20:45:12,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:45:12,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:45:12,632 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:45:12,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708707068] [2020-12-17 20:45:12,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846142652] [2020-12-17 20:45:12,632 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 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 [2020-12-17 20:45:12,695 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-17 20:45:12,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:45:12,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-17 20:45:12,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:45:12,727 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:45:12,767 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:45:12,779 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:45:12,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:45:12,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-12-17 20:45:12,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513436072] [2020-12-17 20:45:12,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-17 20:45:12,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:45:12,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-17 20:45:12,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2020-12-17 20:45:12,781 INFO L87 Difference]: Start difference. First operand 119739 states and 350167 transitions. Second operand has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:45:14,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:45:14,650 INFO L93 Difference]: Finished difference Result 121595 states and 355607 transitions. [2020-12-17 20:45:14,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-17 20:45:14,651 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 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 76 [2020-12-17 20:45:14,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:45:14,652 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=565, Invalid=1505, Unknown=0, NotChecked=0, Total=2070 [2020-12-17 20:45:14,652 INFO L78 Accepts]: Start accepts. Automaton has 121595 states and 355607 transitions. Word has length 76 [2020-12-17 20:45:14,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:45:14,652 INFO L481 AbstractCegarLoop]: Abstraction has 121595 states and 355607 transitions. [2020-12-17 20:45:14,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:45:14,652 INFO L276 IsEmpty]: Start isEmpty. Operand 121595 states and 355607 transitions. [2020-12-17 20:45:14,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-17 20:45:14,775 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:45:14,775 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 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] [2020-12-17 20:45:14,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-12-17 20:45:14,977 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:45:14,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:45:14,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1831372022, now seen corresponding path program 47 times [2020-12-17 20:45:14,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:45:14,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180025885] [2020-12-17 20:45:14,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:45:14,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:45:15,158 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:45:15,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180025885] [2020-12-17 20:45:15,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902552640] [2020-12-17 20:45:15,159 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 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 [2020-12-17 20:45:15,225 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-17 20:45:15,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:45:15,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-17 20:45:15,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:45:15,263 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:45:15,271 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:45:15,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:45:15,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-17 20:45:15,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983035472] [2020-12-17 20:45:15,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-17 20:45:15,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:45:15,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-17 20:45:15,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-12-17 20:45:15,273 INFO L87 Difference]: Start difference. First operand 121595 states and 355607 transitions. 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) [2020-12-17 20:45:17,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:45:17,071 INFO L93 Difference]: Finished difference Result 123579 states and 361431 transitions. [2020-12-17 20:45:17,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-17 20:45:17,072 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 76 [2020-12-17 20:45:17,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:45:17,073 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=500, Invalid=1306, Unknown=0, NotChecked=0, Total=1806 [2020-12-17 20:45:17,073 INFO L78 Accepts]: Start accepts. Automaton has 123579 states and 361431 transitions. Word has length 76 [2020-12-17 20:45:17,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:45:17,073 INFO L481 AbstractCegarLoop]: Abstraction has 123579 states and 361431 transitions. [2020-12-17 20:45:17,073 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) [2020-12-17 20:45:17,073 INFO L276 IsEmpty]: Start isEmpty. Operand 123579 states and 361431 transitions. [2020-12-17 20:45:17,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-17 20:45:17,210 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:45:17,210 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 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] [2020-12-17 20:45:17,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-12-17 20:45:17,411 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:45:17,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:45:17,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1241888826, now seen corresponding path program 48 times [2020-12-17 20:45:17,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:45:17,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574913204] [2020-12-17 20:45:17,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:45:17,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:45:17,633 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:45:17,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574913204] [2020-12-17 20:45:17,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142684183] [2020-12-17 20:45:17,634 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 [2020-12-17 20:45:17,718 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-12-17 20:45:17,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:45:17,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-17 20:45:17,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:45:17,793 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:45:17,813 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:45:17,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:45:17,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-12-17 20:45:17,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180763228] [2020-12-17 20:45:17,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-17 20:45:17,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:45:17,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-17 20:45:17,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2020-12-17 20:45:17,815 INFO L87 Difference]: Start difference. First operand 123579 states and 361431 transitions. Second operand has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:45:19,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:45:19,780 INFO L93 Difference]: Finished difference Result 125307 states and 366487 transitions. [2020-12-17 20:45:19,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-17 20:45:19,783 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 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 76 [2020-12-17 20:45:19,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:45:19,784 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=514, Invalid=1466, Unknown=0, NotChecked=0, Total=1980 [2020-12-17 20:45:19,784 INFO L78 Accepts]: Start accepts. Automaton has 125307 states and 366487 transitions. Word has length 76 [2020-12-17 20:45:19,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:45:19,788 INFO L481 AbstractCegarLoop]: Abstraction has 125307 states and 366487 transitions. [2020-12-17 20:45:19,788 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:45:19,788 INFO L276 IsEmpty]: Start isEmpty. Operand 125307 states and 366487 transitions. [2020-12-17 20:45:19,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-17 20:45:19,961 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:45:19,961 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 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] [2020-12-17 20:45:20,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-12-17 20:45:20,167 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:45:20,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:45:20,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1963045108, now seen corresponding path program 49 times [2020-12-17 20:45:20,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:45:20,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966789257] [2020-12-17 20:45:20,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:45:20,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:45:20,369 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:45:20,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966789257] [2020-12-17 20:45:20,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500924055] [2020-12-17 20:45:20,370 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 [2020-12-17 20:45:20,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:45:20,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-17 20:45:20,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:45:20,499 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:45:20,512 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:45:20,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:45:20,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-17 20:45:20,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727693953] [2020-12-17 20:45:20,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-17 20:45:20,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:45:20,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-17 20:45:20,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2020-12-17 20:45:20,514 INFO L87 Difference]: Start difference. First operand 125307 states and 366487 transitions. 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) [2020-12-17 20:45:22,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:45:22,047 INFO L93 Difference]: Finished difference Result 127163 states and 371927 transitions. [2020-12-17 20:45:22,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-17 20:45:22,048 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 76 [2020-12-17 20:45:22,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:45:22,049 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=562, Invalid=1418, Unknown=0, NotChecked=0, Total=1980 [2020-12-17 20:45:22,049 INFO L78 Accepts]: Start accepts. Automaton has 127163 states and 371927 transitions. Word has length 76 [2020-12-17 20:45:22,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:45:22,049 INFO L481 AbstractCegarLoop]: Abstraction has 127163 states and 371927 transitions. [2020-12-17 20:45:22,049 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) [2020-12-17 20:45:22,049 INFO L276 IsEmpty]: Start isEmpty. Operand 127163 states and 371927 transitions. [2020-12-17 20:45:22,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-17 20:45:22,183 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:45:22,183 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 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] [2020-12-17 20:45:22,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:45:22,384 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:45:22,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:45:22,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1412319292, now seen corresponding path program 50 times [2020-12-17 20:45:22,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:45:22,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650150] [2020-12-17 20:45:22,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:45:22,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:45:22,572 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:45:22,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650150] [2020-12-17 20:45:22,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018772045] [2020-12-17 20:45:22,573 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 [2020-12-17 20:45:23,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-17 20:45:23,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:45:23,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-17 20:45:23,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:45:23,188 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:45:23,223 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:45:23,233 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:45:23,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:45:23,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-12-17 20:45:23,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064218900] [2020-12-17 20:45:23,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-17 20:45:23,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:45:23,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-17 20:45:23,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2020-12-17 20:45:23,235 INFO L87 Difference]: Start difference. First operand 127163 states and 371927 transitions. Second operand has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:45:24,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:45:24,876 INFO L93 Difference]: Finished difference Result 129275 states and 378071 transitions. [2020-12-17 20:45:24,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-17 20:45:24,877 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 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 76 [2020-12-17 20:45:24,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:45:24,878 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=685, Invalid=1765, Unknown=0, NotChecked=0, Total=2450 [2020-12-17 20:45:24,878 INFO L78 Accepts]: Start accepts. Automaton has 129275 states and 378071 transitions. Word has length 76 [2020-12-17 20:45:24,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:45:24,878 INFO L481 AbstractCegarLoop]: Abstraction has 129275 states and 378071 transitions. [2020-12-17 20:45:24,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:45:24,879 INFO L276 IsEmpty]: Start isEmpty. Operand 129275 states and 378071 transitions. [2020-12-17 20:45:25,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-17 20:45:25,015 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:45:25,016 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 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] [2020-12-17 20:45:25,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:45:25,217 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:45:25,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:45:25,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1060243374, now seen corresponding path program 51 times [2020-12-17 20:45:25,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:45:25,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245315495] [2020-12-17 20:45:25,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:45:25,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:45:25,386 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:45:25,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245315495] [2020-12-17 20:45:25,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150723512] [2020-12-17 20:45:25,386 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 [2020-12-17 20:45:25,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-17 20:45:25,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:45:25,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-17 20:45:25,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:45:25,490 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:45:25,497 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:45:25,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:45:25,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-17 20:45:25,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124210099] [2020-12-17 20:45:25,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-17 20:45:25,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:45:25,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-17 20:45:25,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-12-17 20:45:25,499 INFO L87 Difference]: Start difference. First operand 129275 states and 378071 transitions. 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) [2020-12-17 20:45:27,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:45:27,453 INFO L93 Difference]: Finished difference Result 132411 states and 387287 transitions. [2020-12-17 20:45:27,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-17 20:45:27,453 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 76 [2020-12-17 20:45:27,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:45:27,454 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=644, Invalid=1518, Unknown=0, NotChecked=0, Total=2162 [2020-12-17 20:45:27,454 INFO L78 Accepts]: Start accepts. Automaton has 132411 states and 387287 transitions. Word has length 76 [2020-12-17 20:45:27,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:45:27,455 INFO L481 AbstractCegarLoop]: Abstraction has 132411 states and 387287 transitions. [2020-12-17 20:45:27,455 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) [2020-12-17 20:45:27,455 INFO L276 IsEmpty]: Start isEmpty. Operand 132411 states and 387287 transitions. [2020-12-17 20:45:27,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-17 20:45:27,595 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:45:27,595 INFO L504 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 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] [2020-12-17 20:45:27,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:45:27,796 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:45:27,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:45:27,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1063216604, now seen corresponding path program 52 times [2020-12-17 20:45:27,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:45:27,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356708893] [2020-12-17 20:45:27,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:45:27,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:45:27,991 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:45:27,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356708893] [2020-12-17 20:45:27,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886104186] [2020-12-17 20:45:27,991 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 [2020-12-17 20:45:28,055 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-17 20:45:28,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:45:28,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-17 20:45:28,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:45:28,093 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:45:28,122 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:45:28,134 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:45:28,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:45:28,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-12-17 20:45:28,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801452751] [2020-12-17 20:45:28,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-17 20:45:28,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:45:28,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-17 20:45:28,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-12-17 20:45:28,136 INFO L87 Difference]: Start difference. First operand 132411 states and 387287 transitions. Second operand has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:45:30,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:45:30,593 INFO L93 Difference]: Finished difference Result 135867 states and 397271 transitions. [2020-12-17 20:45:30,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-17 20:45:30,594 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 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 76 [2020-12-17 20:45:30,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:45:30,595 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=816, Invalid=2046, Unknown=0, NotChecked=0, Total=2862 [2020-12-17 20:45:30,595 INFO L78 Accepts]: Start accepts. Automaton has 135867 states and 397271 transitions. Word has length 76 [2020-12-17 20:45:30,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:45:30,595 INFO L481 AbstractCegarLoop]: Abstraction has 135867 states and 397271 transitions. [2020-12-17 20:45:30,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:45:30,596 INFO L276 IsEmpty]: Start isEmpty. Operand 135867 states and 397271 transitions. [2020-12-17 20:45:30,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-17 20:45:30,820 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:45:30,821 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 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] [2020-12-17 20:45:31,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:45:31,035 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:45:31,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:45:31,035 INFO L82 PathProgramCache]: Analyzing trace with hash -298810531, now seen corresponding path program 53 times [2020-12-17 20:45:31,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:45:31,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683028289] [2020-12-17 20:45:31,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:45:31,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:45:31,254 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:45:31,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683028289] [2020-12-17 20:45:31,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319684925] [2020-12-17 20:45:31,255 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 [2020-12-17 20:45:31,314 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-17 20:45:31,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:45:31,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-17 20:45:31,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:45:31,357 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:45:31,373 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:45:31,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:45:31,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-17 20:45:31,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476013099] [2020-12-17 20:45:31,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-17 20:45:31,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:45:31,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-17 20:45:31,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-12-17 20:45:31,375 INFO L87 Difference]: Start difference. First operand 135867 states and 397271 transitions. Second operand has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:45:33,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:45:33,389 INFO L93 Difference]: Finished difference Result 138235 states and 404247 transitions. [2020-12-17 20:45:33,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-17 20:45:33,390 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 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 81 [2020-12-17 20:45:33,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:45:33,391 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=504, Invalid=1136, Unknown=0, NotChecked=0, Total=1640 [2020-12-17 20:45:33,391 INFO L78 Accepts]: Start accepts. Automaton has 138235 states and 404247 transitions. Word has length 81 [2020-12-17 20:45:33,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:45:33,391 INFO L481 AbstractCegarLoop]: Abstraction has 138235 states and 404247 transitions. [2020-12-17 20:45:33,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:45:33,391 INFO L276 IsEmpty]: Start isEmpty. Operand 138235 states and 404247 transitions. [2020-12-17 20:45:33,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-17 20:45:33,606 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:45:33,607 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 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] [2020-12-17 20:45:33,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-12-17 20:45:33,808 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:45:33,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:45:33,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1053083055, now seen corresponding path program 54 times [2020-12-17 20:45:33,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:45:33,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389927833] [2020-12-17 20:45:33,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:45:33,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:45:34,108 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:45:34,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389927833] [2020-12-17 20:45:34,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942946887] [2020-12-17 20:45:34,109 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 [2020-12-17 20:45:34,184 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-12-17 20:45:34,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:45:34,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-17 20:45:34,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:45:34,212 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:45:34,259 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:45:34,275 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:45:34,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:45:34,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2020-12-17 20:45:34,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822314598] [2020-12-17 20:45:34,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-17 20:45:34,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:45:34,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-17 20:45:34,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-12-17 20:45:34,277 INFO L87 Difference]: Start difference. First operand 138235 states and 404247 transitions. Second operand has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 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) [2020-12-17 20:45:36,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:45:36,473 INFO L93 Difference]: Finished difference Result 140347 states and 410455 transitions. [2020-12-17 20:45:36,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-17 20:45:36,473 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 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 81 [2020-12-17 20:45:36,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:45:36,474 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=545, Invalid=1435, Unknown=0, NotChecked=0, Total=1980 [2020-12-17 20:45:36,474 INFO L78 Accepts]: Start accepts. Automaton has 140347 states and 410455 transitions. Word has length 81 [2020-12-17 20:45:36,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:45:36,474 INFO L481 AbstractCegarLoop]: Abstraction has 140347 states and 410455 transitions. [2020-12-17 20:45:36,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 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) [2020-12-17 20:45:36,475 INFO L276 IsEmpty]: Start isEmpty. Operand 140347 states and 410455 transitions. [2020-12-17 20:45:36,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-17 20:45:36,675 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:45:36,675 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 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] [2020-12-17 20:45:36,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:45:36,889 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:45:36,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:45:36,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1745619127, now seen corresponding path program 55 times [2020-12-17 20:45:36,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:45:36,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036121350] [2020-12-17 20:45:36,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:45:36,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:45:37,148 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:45:37,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036121350] [2020-12-17 20:45:37,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001231705] [2020-12-17 20:45:37,149 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 [2020-12-17 20:45:37,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:45:37,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-17 20:45:37,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:45:37,280 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:45:37,304 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:45:37,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:45:37,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-17 20:45:37,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632941590] [2020-12-17 20:45:37,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-17 20:45:37,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:45:37,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-17 20:45:37,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-12-17 20:45:37,306 INFO L87 Difference]: Start difference. First operand 140347 states and 410455 transitions. Second operand has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:45:39,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:45:39,506 INFO L93 Difference]: Finished difference Result 142459 states and 416663 transitions. [2020-12-17 20:45:39,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-17 20:45:39,513 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 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 81 [2020-12-17 20:45:39,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:45:39,514 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=539, Invalid=1441, Unknown=0, NotChecked=0, Total=1980 [2020-12-17 20:45:39,514 INFO L78 Accepts]: Start accepts. Automaton has 142459 states and 416663 transitions. Word has length 81 [2020-12-17 20:45:39,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:45:39,514 INFO L481 AbstractCegarLoop]: Abstraction has 142459 states and 416663 transitions. [2020-12-17 20:45:39,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:45:39,514 INFO L276 IsEmpty]: Start isEmpty. Operand 142459 states and 416663 transitions. [2020-12-17 20:45:39,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-17 20:45:39,755 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:45:39,756 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 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] [2020-12-17 20:45:39,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-12-17 20:45:39,957 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:45:39,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:45:39,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1956131353, now seen corresponding path program 56 times [2020-12-17 20:45:39,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:45:39,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72724822] [2020-12-17 20:45:39,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:45:39,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:45:40,211 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:45:40,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72724822] [2020-12-17 20:45:40,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26966250] [2020-12-17 20:45:40,211 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 [2020-12-17 20:45:40,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-17 20:45:40,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:45:40,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-17 20:45:40,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:45:40,296 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:45:40,337 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:45:40,347 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:45:40,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:45:40,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2020-12-17 20:45:40,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447666385] [2020-12-17 20:45:40,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-17 20:45:40,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:45:40,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-17 20:45:40,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2020-12-17 20:45:40,350 INFO L87 Difference]: Start difference. First operand 142459 states and 416663 transitions. Second operand has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 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) [2020-12-17 20:45:41,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:45:41,804 INFO L93 Difference]: Finished difference Result 146043 states and 427159 transitions. [2020-12-17 20:45:41,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-17 20:45:41,805 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 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 81 [2020-12-17 20:45:41,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:45:41,806 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=620, Invalid=1636, Unknown=0, NotChecked=0, Total=2256 [2020-12-17 20:45:41,806 INFO L78 Accepts]: Start accepts. Automaton has 146043 states and 427159 transitions. Word has length 81 [2020-12-17 20:45:41,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:45:41,807 INFO L481 AbstractCegarLoop]: Abstraction has 146043 states and 427159 transitions. [2020-12-17 20:45:41,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 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) [2020-12-17 20:45:41,807 INFO L276 IsEmpty]: Start isEmpty. Operand 146043 states and 427159 transitions. [2020-12-17 20:45:42,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-17 20:45:42,869 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:45:42,869 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 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] [2020-12-17 20:45:43,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:45:43,083 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:45:43,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:45:43,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1783445575, now seen corresponding path program 57 times [2020-12-17 20:45:43,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:45:43,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235004988] [2020-12-17 20:45:43,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:45:43,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:45:43,315 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:45:43,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235004988] [2020-12-17 20:45:43,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859893875] [2020-12-17 20:45:43,315 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 [2020-12-17 20:45:43,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-17 20:45:43,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:45:43,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-17 20:45:43,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:45:43,416 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:45:43,428 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:45:43,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:45:43,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-17 20:45:43,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703494735] [2020-12-17 20:45:43,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-17 20:45:43,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:45:43,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-17 20:45:43,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-12-17 20:45:43,430 INFO L87 Difference]: Start difference. First operand 146043 states and 427159 transitions. Second operand has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:45:44,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:45:44,804 INFO L93 Difference]: Finished difference Result 148155 states and 433367 transitions. [2020-12-17 20:45:44,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-17 20:45:44,805 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 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 81 [2020-12-17 20:45:44,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:45:44,806 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=627, Invalid=1629, Unknown=0, NotChecked=0, Total=2256 [2020-12-17 20:45:44,806 INFO L78 Accepts]: Start accepts. Automaton has 148155 states and 433367 transitions. Word has length 81 [2020-12-17 20:45:44,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:45:44,807 INFO L481 AbstractCegarLoop]: Abstraction has 148155 states and 433367 transitions. [2020-12-17 20:45:44,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:45:44,807 INFO L276 IsEmpty]: Start isEmpty. Operand 148155 states and 433367 transitions. [2020-12-17 20:45:44,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-17 20:45:44,961 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:45:44,962 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 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] [2020-12-17 20:45:45,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-12-17 20:45:45,163 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:45:45,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:45:45,163 INFO L82 PathProgramCache]: Analyzing trace with hash -349849833, now seen corresponding path program 58 times [2020-12-17 20:45:45,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:45:45,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441878948] [2020-12-17 20:45:45,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:45:45,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:45:45,438 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:45:45,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441878948] [2020-12-17 20:45:45,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977063287] [2020-12-17 20:45:45,439 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 [2020-12-17 20:45:46,280 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-17 20:45:46,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:45:46,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-17 20:45:46,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:45:46,385 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:45:46,428 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:45:46,446 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:45:46,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:45:46,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2020-12-17 20:45:46,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146404919] [2020-12-17 20:45:46,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-17 20:45:46,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:45:46,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-17 20:45:46,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2020-12-17 20:45:46,448 INFO L87 Difference]: Start difference. First operand 148155 states and 433367 transitions. Second operand has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 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) [2020-12-17 20:45:48,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:45:48,283 INFO L93 Difference]: Finished difference Result 150011 states and 438807 transitions. [2020-12-17 20:45:48,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-17 20:45:48,284 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 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 81 [2020-12-17 20:45:48,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:45:48,285 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=659, Invalid=1791, Unknown=0, NotChecked=0, Total=2450 [2020-12-17 20:45:48,285 INFO L78 Accepts]: Start accepts. Automaton has 150011 states and 438807 transitions. Word has length 81 [2020-12-17 20:45:48,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:45:48,285 INFO L481 AbstractCegarLoop]: Abstraction has 150011 states and 438807 transitions. [2020-12-17 20:45:48,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 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) [2020-12-17 20:45:48,286 INFO L276 IsEmpty]: Start isEmpty. Operand 150011 states and 438807 transitions. [2020-12-17 20:45:48,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-17 20:45:48,465 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:45:48,465 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 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] [2020-12-17 20:45:48,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:45:48,666 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:45:48,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:45:48,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1540751045, now seen corresponding path program 59 times [2020-12-17 20:45:48,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:45:48,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581446451] [2020-12-17 20:45:48,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:45:48,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:45:48,872 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:45:48,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581446451] [2020-12-17 20:45:48,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192767719] [2020-12-17 20:45:48,873 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 [2020-12-17 20:45:48,936 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-17 20:45:48,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:45:48,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-17 20:45:48,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:45:48,979 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:45:48,993 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:45:48,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:45:48,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-17 20:45:48,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630528110] [2020-12-17 20:45:48,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-17 20:45:48,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:45:48,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-17 20:45:48,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-12-17 20:45:48,995 INFO L87 Difference]: Start difference. First operand 150011 states and 438807 transitions. Second operand has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:45:50,068 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2020-12-17 20:45:51,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:45:51,311 INFO L93 Difference]: Finished difference Result 151995 states and 444631 transitions. [2020-12-17 20:45:51,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-17 20:45:51,311 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 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 81 [2020-12-17 20:45:51,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:45:51,312 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=686, Invalid=1764, Unknown=0, NotChecked=0, Total=2450 [2020-12-17 20:45:51,312 INFO L78 Accepts]: Start accepts. Automaton has 151995 states and 444631 transitions. Word has length 81 [2020-12-17 20:45:51,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:45:51,313 INFO L481 AbstractCegarLoop]: Abstraction has 151995 states and 444631 transitions. [2020-12-17 20:45:51,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:45:51,313 INFO L276 IsEmpty]: Start isEmpty. Operand 151995 states and 444631 transitions. [2020-12-17 20:45:51,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-17 20:45:51,495 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:45:51,495 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 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] [2020-12-17 20:45:51,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:45:51,696 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:45:51,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:45:51,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1532509803, now seen corresponding path program 60 times [2020-12-17 20:45:51,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:45:51,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314416829] [2020-12-17 20:45:51,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:45:51,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:45:51,909 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:45:51,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314416829] [2020-12-17 20:45:51,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133524193] [2020-12-17 20:45:51,909 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 [2020-12-17 20:45:51,976 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-12-17 20:45:51,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:45:51,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-17 20:45:51,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:45:52,049 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:45:52,061 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:45:52,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:45:52,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2020-12-17 20:45:52,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406838821] [2020-12-17 20:45:52,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-17 20:45:52,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:45:52,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-17 20:45:52,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2020-12-17 20:45:52,065 INFO L87 Difference]: Start difference. First operand 151995 states and 444631 transitions. Second operand has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 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) [2020-12-17 20:45:54,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:45:54,640 INFO L93 Difference]: Finished difference Result 153723 states and 449687 transitions. [2020-12-17 20:45:54,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-17 20:45:54,640 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 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 81 [2020-12-17 20:45:54,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:45:54,641 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=694, Invalid=1958, Unknown=0, NotChecked=0, Total=2652 [2020-12-17 20:45:54,641 INFO L78 Accepts]: Start accepts. Automaton has 153723 states and 449687 transitions. Word has length 81 [2020-12-17 20:45:54,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:45:54,641 INFO L481 AbstractCegarLoop]: Abstraction has 153723 states and 449687 transitions. [2020-12-17 20:45:54,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 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) [2020-12-17 20:45:54,641 INFO L276 IsEmpty]: Start isEmpty. Operand 153723 states and 449687 transitions. [2020-12-17 20:45:54,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-17 20:45:54,781 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:45:54,781 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 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] [2020-12-17 20:45:54,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2020-12-17 20:45:54,982 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:45:54,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:45:54,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1672424131, now seen corresponding path program 61 times [2020-12-17 20:45:54,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:45:54,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143020541] [2020-12-17 20:45:54,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:45:54,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:45:55,197 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:45:55,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143020541] [2020-12-17 20:45:55,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304216225] [2020-12-17 20:45:55,198 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 [2020-12-17 20:45:55,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:45:55,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-17 20:45:55,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:45:55,317 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:45:55,333 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:45:55,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:45:55,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-17 20:45:55,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200667452] [2020-12-17 20:45:55,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-17 20:45:55,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:45:55,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-17 20:45:55,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-12-17 20:45:55,337 INFO L87 Difference]: Start difference. First operand 153723 states and 449687 transitions. Second operand has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:45:58,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:45:58,057 INFO L93 Difference]: Finished difference Result 155579 states and 455127 transitions. [2020-12-17 20:45:58,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-17 20:45:58,057 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 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 81 [2020-12-17 20:45:58,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:45:58,058 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=765, Invalid=1887, Unknown=0, NotChecked=0, Total=2652 [2020-12-17 20:45:58,058 INFO L78 Accepts]: Start accepts. Automaton has 155579 states and 455127 transitions. Word has length 81 [2020-12-17 20:45:58,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:45:58,058 INFO L481 AbstractCegarLoop]: Abstraction has 155579 states and 455127 transitions. [2020-12-17 20:45:58,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:45:58,059 INFO L276 IsEmpty]: Start isEmpty. Operand 155579 states and 455127 transitions. [2020-12-17 20:45:58,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-17 20:45:58,238 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:45:58,238 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 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] [2020-12-17 20:45:58,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:45:58,439 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:45:58,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:45:58,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1702940269, now seen corresponding path program 62 times [2020-12-17 20:45:58,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:45:58,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568836842] [2020-12-17 20:45:58,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:45:58,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:45:58,648 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:45:58,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568836842] [2020-12-17 20:45:58,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799025796] [2020-12-17 20:45:58,649 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 [2020-12-17 20:45:58,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-17 20:45:58,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:45:58,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-17 20:45:58,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:45:58,744 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:45:58,787 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:45:58,799 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:45:58,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:45:58,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2020-12-17 20:45:58,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251580310] [2020-12-17 20:45:58,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-17 20:45:58,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:45:58,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-17 20:45:58,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-12-17 20:45:58,801 INFO L87 Difference]: Start difference. First operand 155579 states and 455127 transitions. Second operand has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 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) [2020-12-17 20:46:01,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:46:01,872 INFO L93 Difference]: Finished difference Result 157819 states and 461655 transitions. [2020-12-17 20:46:01,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-17 20:46:01,873 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 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 81 [2020-12-17 20:46:01,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:46:01,875 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=797, Invalid=2065, Unknown=0, NotChecked=0, Total=2862 [2020-12-17 20:46:01,875 INFO L78 Accepts]: Start accepts. Automaton has 157819 states and 461655 transitions. Word has length 81 [2020-12-17 20:46:01,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:46:01,875 INFO L481 AbstractCegarLoop]: Abstraction has 157819 states and 461655 transitions. [2020-12-17 20:46:01,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 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) [2020-12-17 20:46:01,876 INFO L276 IsEmpty]: Start isEmpty. Operand 157819 states and 461655 transitions. [2020-12-17 20:46:02,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-17 20:46:02,057 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:46:02,057 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 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] [2020-12-17 20:46:02,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:46:02,258 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:46:02,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:46:02,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1350864351, now seen corresponding path program 63 times [2020-12-17 20:46:02,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:46:02,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630787303] [2020-12-17 20:46:02,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:46:02,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:46:02,442 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:46:02,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630787303] [2020-12-17 20:46:02,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488345395] [2020-12-17 20:46:02,443 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 [2020-12-17 20:46:02,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-17 20:46:02,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:46:02,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-17 20:46:02,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:46:02,555 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:46:02,567 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:46:02,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:46:02,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-17 20:46:02,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506200448] [2020-12-17 20:46:02,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-17 20:46:02,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:46:02,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-17 20:46:02,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-12-17 20:46:02,569 INFO L87 Difference]: Start difference. First operand 157819 states and 461655 transitions. Second operand has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:46:05,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:46:05,247 INFO L93 Difference]: Finished difference Result 161083 states and 471255 transitions. [2020-12-17 20:46:05,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-17 20:46:05,248 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 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 81 [2020-12-17 20:46:05,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:46:05,249 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 905 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=864, Invalid=1998, Unknown=0, NotChecked=0, Total=2862 [2020-12-17 20:46:05,249 INFO L78 Accepts]: Start accepts. Automaton has 161083 states and 471255 transitions. Word has length 81 [2020-12-17 20:46:05,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:46:05,249 INFO L481 AbstractCegarLoop]: Abstraction has 161083 states and 471255 transitions. [2020-12-17 20:46:05,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:46:05,249 INFO L276 IsEmpty]: Start isEmpty. Operand 161083 states and 471255 transitions. [2020-12-17 20:46:05,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-17 20:46:05,424 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:46:05,424 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 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] [2020-12-17 20:46:05,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-12-17 20:46:05,625 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:46:05,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:46:05,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1353837581, now seen corresponding path program 64 times [2020-12-17 20:46:05,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:46:05,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316558206] [2020-12-17 20:46:05,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:46:05,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:46:05,834 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:46:05,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316558206] [2020-12-17 20:46:05,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711153617] [2020-12-17 20:46:05,834 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 [2020-12-17 20:46:05,900 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-17 20:46:05,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:46:05,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-17 20:46:05,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:46:05,943 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:46:05,977 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:46:05,989 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:46:05,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:46:05,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2020-12-17 20:46:05,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701576145] [2020-12-17 20:46:05,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-17 20:46:05,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:46:05,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-17 20:46:05,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2020-12-17 20:46:05,991 INFO L87 Difference]: Start difference. First operand 161083 states and 471255 transitions. Second operand has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 18 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) [2020-12-17 20:46:08,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:46:08,955 INFO L93 Difference]: Finished difference Result 164795 states and 482007 transitions. [2020-12-17 20:46:08,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-17 20:46:08,955 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 18 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 81 [2020-12-17 20:46:08,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:46:08,956 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1019 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=940, Invalid=2366, Unknown=0, NotChecked=0, Total=3306 [2020-12-17 20:46:08,956 INFO L78 Accepts]: Start accepts. Automaton has 164795 states and 482007 transitions. Word has length 81 [2020-12-17 20:46:08,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:46:08,956 INFO L481 AbstractCegarLoop]: Abstraction has 164795 states and 482007 transitions. [2020-12-17 20:46:08,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 18 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) [2020-12-17 20:46:08,957 INFO L276 IsEmpty]: Start isEmpty. Operand 164795 states and 482007 transitions. [2020-12-17 20:46:09,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-17 20:46:09,166 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:46:09,167 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 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, 1] [2020-12-17 20:46:09,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:46:09,368 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:46:09,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:46:09,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1585971837, now seen corresponding path program 65 times [2020-12-17 20:46:09,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:46:09,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676399850] [2020-12-17 20:46:09,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:46:09,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:46:09,639 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:46:09,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676399850] [2020-12-17 20:46:09,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63173388] [2020-12-17 20:46:09,639 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 [2020-12-17 20:46:09,707 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-12-17 20:46:09,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:46:09,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-17 20:46:09,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:46:09,748 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:46:09,767 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:46:09,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:46:09,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-17 20:46:09,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135844519] [2020-12-17 20:46:09,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-17 20:46:09,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:46:09,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-17 20:46:09,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2020-12-17 20:46:09,769 INFO L87 Difference]: Start difference. First operand 164795 states and 482007 transitions. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:46:12,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:46:12,564 INFO L93 Difference]: Finished difference Result 167675 states and 490519 transitions. [2020-12-17 20:46:12,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-17 20:46:12,565 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 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 86 [2020-12-17 20:46:12,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:46:12,566 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=583, Invalid=1397, Unknown=0, NotChecked=0, Total=1980 [2020-12-17 20:46:12,566 INFO L78 Accepts]: Start accepts. Automaton has 167675 states and 490519 transitions. Word has length 86 [2020-12-17 20:46:12,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:46:12,566 INFO L481 AbstractCegarLoop]: Abstraction has 167675 states and 490519 transitions. [2020-12-17 20:46:12,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:46:12,567 INFO L276 IsEmpty]: Start isEmpty. Operand 167675 states and 490519 transitions. [2020-12-17 20:46:12,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-17 20:46:12,916 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:46:12,916 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 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, 1] [2020-12-17 20:46:13,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-12-17 20:46:13,130 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:46:13,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:46:13,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1357101873, now seen corresponding path program 66 times [2020-12-17 20:46:13,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:46:13,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167817335] [2020-12-17 20:46:13,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:46:13,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:46:13,467 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:46:13,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167817335] [2020-12-17 20:46:13,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737063358] [2020-12-17 20:46:13,468 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 [2020-12-17 20:46:13,541 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-17 20:46:13,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:46:13,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-17 20:46:13,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:46:13,570 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:46:13,613 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:46:13,635 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:46:13,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:46:13,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-12-17 20:46:13,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978674074] [2020-12-17 20:46:13,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-17 20:46:13,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:46:13,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-17 20:46:13,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-12-17 20:46:13,637 INFO L87 Difference]: Start difference. First operand 167675 states and 490519 transitions. Second operand has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:46:16,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:46:16,333 INFO L93 Difference]: Finished difference Result 169787 states and 496727 transitions. [2020-12-17 20:46:16,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-17 20:46:16,334 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 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 86 [2020-12-17 20:46:16,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:46:16,336 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=692, Invalid=1758, Unknown=0, NotChecked=0, Total=2450 [2020-12-17 20:46:16,337 INFO L78 Accepts]: Start accepts. Automaton has 169787 states and 496727 transitions. Word has length 86 [2020-12-17 20:46:16,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:46:16,337 INFO L481 AbstractCegarLoop]: Abstraction has 169787 states and 496727 transitions. [2020-12-17 20:46:16,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:46:16,337 INFO L276 IsEmpty]: Start isEmpty. Operand 169787 states and 496727 transitions. [2020-12-17 20:46:16,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-17 20:46:16,779 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:46:16,779 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 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, 1] [2020-12-17 20:46:16,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-12-17 20:46:16,995 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:46:16,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:46:16,996 INFO L82 PathProgramCache]: Analyzing trace with hash 139163241, now seen corresponding path program 67 times [2020-12-17 20:46:16,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:46:16,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391961181] [2020-12-17 20:46:16,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:46:17,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:46:17,408 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:46:17,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391961181] [2020-12-17 20:46:17,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215484753] [2020-12-17 20:46:17,409 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 [2020-12-17 20:46:17,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:46:17,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-17 20:46:17,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:46:17,808 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:46:17,827 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:46:17,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:46:17,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-17 20:46:17,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463341742] [2020-12-17 20:46:17,830 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-17 20:46:17,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:46:17,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-17 20:46:17,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2020-12-17 20:46:17,844 INFO L87 Difference]: Start difference. First operand 169787 states and 496727 transitions. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:46:19,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:46:19,651 INFO L93 Difference]: Finished difference Result 171899 states and 502935 transitions. [2020-12-17 20:46:19,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-17 20:46:19,652 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 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 86 [2020-12-17 20:46:19,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:46:19,653 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=603, Invalid=1559, Unknown=0, NotChecked=0, Total=2162 [2020-12-17 20:46:19,653 INFO L78 Accepts]: Start accepts. Automaton has 171899 states and 502935 transitions. Word has length 86 [2020-12-17 20:46:19,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:46:19,654 INFO L481 AbstractCegarLoop]: Abstraction has 171899 states and 502935 transitions. [2020-12-17 20:46:19,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:46:19,654 INFO L276 IsEmpty]: Start isEmpty. Operand 171899 states and 502935 transitions. [2020-12-17 20:46:20,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-17 20:46:20,894 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:46:20,894 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 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, 1] [2020-12-17 20:46:21,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-12-17 20:46:21,114 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:46:21,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:46:21,115 INFO L82 PathProgramCache]: Analyzing trace with hash -454053575, now seen corresponding path program 68 times [2020-12-17 20:46:21,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:46:21,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113414067] [2020-12-17 20:46:21,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:46:21,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:46:21,390 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:46:21,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113414067] [2020-12-17 20:46:21,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928092276] [2020-12-17 20:46:21,391 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 [2020-12-17 20:46:21,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-17 20:46:21,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:46:21,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-17 20:46:21,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:46:21,551 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:46:21,594 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:46:21,613 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:46:21,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:46:21,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-12-17 20:46:21,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391312324] [2020-12-17 20:46:21,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-17 20:46:21,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:46:21,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-17 20:46:21,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-12-17 20:46:21,615 INFO L87 Difference]: Start difference. First operand 171899 states and 502935 transitions. Second operand has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:46:23,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:46:23,769 INFO L93 Difference]: Finished difference Result 173883 states and 508759 transitions. [2020-12-17 20:46:23,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-17 20:46:23,770 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 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 86 [2020-12-17 20:46:23,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:46:23,771 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=720, Invalid=1932, Unknown=0, NotChecked=0, Total=2652 [2020-12-17 20:46:23,771 INFO L78 Accepts]: Start accepts. Automaton has 173883 states and 508759 transitions. Word has length 86 [2020-12-17 20:46:23,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:46:23,772 INFO L481 AbstractCegarLoop]: Abstraction has 173883 states and 508759 transitions. [2020-12-17 20:46:23,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:46:23,772 INFO L276 IsEmpty]: Start isEmpty. Operand 173883 states and 508759 transitions. [2020-12-17 20:46:24,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-17 20:46:24,945 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:46:24,945 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 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, 1] [2020-12-17 20:46:25,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:46:25,159 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:46:25,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:46:25,160 INFO L82 PathProgramCache]: Analyzing trace with hash -626739353, now seen corresponding path program 69 times [2020-12-17 20:46:25,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:46:25,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265342284] [2020-12-17 20:46:25,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:46:25,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:46:25,606 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:46:25,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265342284] [2020-12-17 20:46:25,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651958339] [2020-12-17 20:46:25,607 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 [2020-12-17 20:46:25,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-17 20:46:25,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:46:25,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-17 20:46:25,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:46:25,734 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:46:25,767 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:46:25,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:46:25,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-17 20:46:25,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992081656] [2020-12-17 20:46:25,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-17 20:46:25,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:46:25,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-17 20:46:25,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-12-17 20:46:25,773 INFO L87 Difference]: Start difference. First operand 173883 states and 508759 transitions. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:46:27,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:46:27,773 INFO L93 Difference]: Finished difference Result 175995 states and 514967 transitions. [2020-12-17 20:46:27,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-17 20:46:27,774 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 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 86 [2020-12-17 20:46:27,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:46:27,776 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=643, Invalid=1709, Unknown=0, NotChecked=0, Total=2352 [2020-12-17 20:46:27,776 INFO L78 Accepts]: Start accepts. Automaton has 175995 states and 514967 transitions. Word has length 86 [2020-12-17 20:46:27,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:46:27,776 INFO L481 AbstractCegarLoop]: Abstraction has 175995 states and 514967 transitions. [2020-12-17 20:46:27,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:46:27,777 INFO L276 IsEmpty]: Start isEmpty. Operand 175995 states and 514967 transitions. [2020-12-17 20:46:29,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-17 20:46:29,098 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:46:29,098 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 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, 1] [2020-12-17 20:46:29,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:46:29,300 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:46:29,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:46:29,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1534932535, now seen corresponding path program 70 times [2020-12-17 20:46:29,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:46:29,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702406422] [2020-12-17 20:46:29,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:46:29,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:46:29,607 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:46:29,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702406422] [2020-12-17 20:46:29,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922500237] [2020-12-17 20:46:29,608 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 [2020-12-17 20:46:29,695 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-17 20:46:29,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:46:29,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-17 20:46:29,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:46:29,724 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:46:29,769 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:46:29,792 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:46:29,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:46:29,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-12-17 20:46:29,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021833575] [2020-12-17 20:46:29,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-17 20:46:29,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:46:29,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-17 20:46:29,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2020-12-17 20:46:29,794 INFO L87 Difference]: Start difference. First operand 175995 states and 514967 transitions. Second operand has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:46:32,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:46:32,215 INFO L93 Difference]: Finished difference Result 177851 states and 520407 transitions. [2020-12-17 20:46:32,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-17 20:46:32,216 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 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 86 [2020-12-17 20:46:32,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:46:32,217 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=768, Invalid=2094, Unknown=0, NotChecked=0, Total=2862 [2020-12-17 20:46:32,217 INFO L78 Accepts]: Start accepts. Automaton has 177851 states and 520407 transitions. Word has length 86 [2020-12-17 20:46:32,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:46:32,217 INFO L481 AbstractCegarLoop]: Abstraction has 177851 states and 520407 transitions. [2020-12-17 20:46:32,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:46:32,217 INFO L276 IsEmpty]: Start isEmpty. Operand 177851 states and 520407 transitions. [2020-12-17 20:46:33,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-17 20:46:33,427 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:46:33,427 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 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, 1] [2020-12-17 20:46:33,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:46:33,646 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:46:33,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:46:33,647 INFO L82 PathProgramCache]: Analyzing trace with hash -869433883, now seen corresponding path program 71 times [2020-12-17 20:46:33,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:46:33,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462704558] [2020-12-17 20:46:33,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:46:33,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:46:33,891 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:46:33,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462704558] [2020-12-17 20:46:33,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282517138] [2020-12-17 20:46:33,891 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 [2020-12-17 20:46:33,955 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-12-17 20:46:33,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:46:33,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-17 20:46:33,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:46:34,002 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:46:34,018 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:46:34,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:46:34,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-17 20:46:34,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769308047] [2020-12-17 20:46:34,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-17 20:46:34,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:46:34,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-17 20:46:34,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2020-12-17 20:46:34,020 INFO L87 Difference]: Start difference. First operand 177851 states and 520407 transitions. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:46:35,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:46:35,886 INFO L93 Difference]: Finished difference Result 179835 states and 526231 transitions. [2020-12-17 20:46:35,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-17 20:46:35,887 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 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 86 [2020-12-17 20:46:35,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:46:35,888 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=703, Invalid=1847, Unknown=0, NotChecked=0, Total=2550 [2020-12-17 20:46:35,888 INFO L78 Accepts]: Start accepts. Automaton has 179835 states and 526231 transitions. Word has length 86 [2020-12-17 20:46:35,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:46:35,888 INFO L481 AbstractCegarLoop]: Abstraction has 179835 states and 526231 transitions. [2020-12-17 20:46:35,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:46:35,888 INFO L276 IsEmpty]: Start isEmpty. Operand 179835 states and 526231 transitions. [2020-12-17 20:46:36,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-17 20:46:36,938 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:46:36,938 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 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, 1] [2020-12-17 20:46:37,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:46:37,147 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:46:37,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:46:37,151 INFO L82 PathProgramCache]: Analyzing trace with hash 352272565, now seen corresponding path program 72 times [2020-12-17 20:46:37,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:46:37,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008939921] [2020-12-17 20:46:37,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:46:37,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:46:37,543 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:46:37,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008939921] [2020-12-17 20:46:37,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756559044] [2020-12-17 20:46:37,543 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 [2020-12-17 20:46:37,637 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-17 20:46:37,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:46:37,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-17 20:46:37,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:46:37,763 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:46:37,775 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:46:37,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:46:37,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-12-17 20:46:37,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149486132] [2020-12-17 20:46:37,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-17 20:46:37,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:46:37,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-17 20:46:37,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2020-12-17 20:46:37,791 INFO L87 Difference]: Start difference. First operand 179835 states and 526231 transitions. Second operand has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:46:40,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:46:40,011 INFO L93 Difference]: Finished difference Result 181563 states and 531287 transitions. [2020-12-17 20:46:40,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-17 20:46:40,012 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 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 86 [2020-12-17 20:46:40,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:46:40,013 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=705, Invalid=2051, Unknown=0, NotChecked=0, Total=2756 [2020-12-17 20:46:40,013 INFO L78 Accepts]: Start accepts. Automaton has 181563 states and 531287 transitions. Word has length 86 [2020-12-17 20:46:40,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:46:40,013 INFO L481 AbstractCegarLoop]: Abstraction has 181563 states and 531287 transitions. [2020-12-17 20:46:40,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:46:40,014 INFO L276 IsEmpty]: Start isEmpty. Operand 181563 states and 531287 transitions. [2020-12-17 20:46:41,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-17 20:46:41,062 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:46:41,065 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 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, 1] [2020-12-17 20:46:41,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2020-12-17 20:46:41,281 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:46:41,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:46:41,282 INFO L82 PathProgramCache]: Analyzing trace with hash -737760797, now seen corresponding path program 73 times [2020-12-17 20:46:41,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:46:41,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788240790] [2020-12-17 20:46:41,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:46:41,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:46:42,178 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:46:42,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788240790] [2020-12-17 20:46:42,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999421769] [2020-12-17 20:46:42,179 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 [2020-12-17 20:46:42,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:46:42,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-17 20:46:42,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:46:42,768 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:46:42,781 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:46:42,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:46:42,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-17 20:46:42,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645990214] [2020-12-17 20:46:42,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-17 20:46:42,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:46:42,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-17 20:46:42,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-12-17 20:46:42,798 INFO L87 Difference]: Start difference. First operand 181563 states and 531287 transitions. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:46:44,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:46:44,801 INFO L93 Difference]: Finished difference Result 183419 states and 536727 transitions. [2020-12-17 20:46:44,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-17 20:46:44,802 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 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 86 [2020-12-17 20:46:44,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:46:44,803 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=783, Invalid=1973, Unknown=0, NotChecked=0, Total=2756 [2020-12-17 20:46:44,803 INFO L78 Accepts]: Start accepts. Automaton has 183419 states and 536727 transitions. Word has length 86 [2020-12-17 20:46:44,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:46:44,804 INFO L481 AbstractCegarLoop]: Abstraction has 183419 states and 536727 transitions. [2020-12-17 20:46:44,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:46:44,805 INFO L276 IsEmpty]: Start isEmpty. Operand 183419 states and 536727 transitions. [2020-12-17 20:46:46,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-17 20:46:46,105 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:46:46,106 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 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, 1] [2020-12-17 20:46:46,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:46:46,306 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:46:46,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:46:46,307 INFO L82 PathProgramCache]: Analyzing trace with hash 181842099, now seen corresponding path program 74 times [2020-12-17 20:46:46,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:46:46,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967417589] [2020-12-17 20:46:46,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:46:46,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:46:46,565 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:46:46,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967417589] [2020-12-17 20:46:46,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270571938] [2020-12-17 20:46:46,566 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 [2020-12-17 20:46:46,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-17 20:46:46,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:46:46,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-17 20:46:46,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:46:46,686 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:46:46,720 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:46:46,732 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:46:46,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:46:46,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-12-17 20:46:46,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447700436] [2020-12-17 20:46:46,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-17 20:46:46,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:46:46,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-17 20:46:46,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-12-17 20:46:46,734 INFO L87 Difference]: Start difference. First operand 183419 states and 536727 transitions. Second operand has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:46:49,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:46:49,853 INFO L93 Difference]: Finished difference Result 186299 states and 545111 transitions. [2020-12-17 20:46:49,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-17 20:46:49,853 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 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 86 [2020-12-17 20:46:49,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:46:49,866 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 958 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=924, Invalid=2382, Unknown=0, NotChecked=0, Total=3306 [2020-12-17 20:46:49,867 INFO L78 Accepts]: Start accepts. Automaton has 186299 states and 545111 transitions. Word has length 86 [2020-12-17 20:46:49,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:46:49,868 INFO L481 AbstractCegarLoop]: Abstraction has 186299 states and 545111 transitions. [2020-12-17 20:46:49,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:46:49,868 INFO L276 IsEmpty]: Start isEmpty. Operand 186299 states and 545111 transitions. [2020-12-17 20:46:50,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-17 20:46:50,285 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:46:50,285 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 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, 1] [2020-12-17 20:46:50,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:46:50,502 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:46:50,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:46:50,502 INFO L82 PathProgramCache]: Analyzing trace with hash 533918017, now seen corresponding path program 75 times [2020-12-17 20:46:50,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:46:50,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815001686] [2020-12-17 20:46:50,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:46:50,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:46:50,719 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:46:50,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815001686] [2020-12-17 20:46:50,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527499604] [2020-12-17 20:46:50,719 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 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 [2020-12-17 20:46:50,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-17 20:46:50,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:46:50,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-17 20:46:50,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:46:50,837 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:46:50,849 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:46:50,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:46:50,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-17 20:46:50,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015269826] [2020-12-17 20:46:50,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-17 20:46:50,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:46:50,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-17 20:46:50,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2020-12-17 20:46:50,851 INFO L87 Difference]: Start difference. First operand 186299 states and 545111 transitions. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:46:53,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:46:53,826 INFO L93 Difference]: Finished difference Result 189563 states and 554711 transitions. [2020-12-17 20:46:53,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-17 20:46:53,830 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 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 86 [2020-12-17 20:46:53,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:46:53,830 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=883, Invalid=2087, Unknown=0, NotChecked=0, Total=2970 [2020-12-17 20:46:53,831 INFO L78 Accepts]: Start accepts. Automaton has 189563 states and 554711 transitions. Word has length 86 [2020-12-17 20:46:53,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:46:53,831 INFO L481 AbstractCegarLoop]: Abstraction has 189563 states and 554711 transitions. [2020-12-17 20:46:53,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:46:53,831 INFO L276 IsEmpty]: Start isEmpty. Operand 189563 states and 554711 transitions. [2020-12-17 20:46:54,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-17 20:46:54,245 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:46:54,245 INFO L504 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 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, 1] [2020-12-17 20:46:54,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:46:54,459 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:46:54,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:46:54,460 INFO L82 PathProgramCache]: Analyzing trace with hash 530944787, now seen corresponding path program 76 times [2020-12-17 20:46:54,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:46:54,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466843194] [2020-12-17 20:46:54,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:46:54,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:46:54,667 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:46:54,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466843194] [2020-12-17 20:46:54,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074405139] [2020-12-17 20:46:54,668 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 [2020-12-17 20:46:54,729 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-17 20:46:54,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:46:54,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-17 20:46:54,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:46:54,763 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:46:54,784 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:46:54,794 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:46:54,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:46:54,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-12-17 20:46:54,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861395297] [2020-12-17 20:46:54,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-17 20:46:54,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:46:54,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-17 20:46:54,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-12-17 20:46:54,797 INFO L87 Difference]: Start difference. First operand 189563 states and 554711 transitions. Second operand has 19 states, 19 states have (on average 4.684210526315789) internal successors, (89), 19 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:46:58,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:46:58,249 INFO L93 Difference]: Finished difference Result 190907 states and 558551 transitions. [2020-12-17 20:46:58,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-12-17 20:46:58,250 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.684210526315789) internal successors, (89), 19 states have internal predecessors, (89), 0 states have call successors, (0), 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 86 [2020-12-17 20:46:58,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:46:58,251 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1155 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1079, Invalid=2703, Unknown=0, NotChecked=0, Total=3782 [2020-12-17 20:46:58,251 INFO L78 Accepts]: Start accepts. Automaton has 190907 states and 558551 transitions. Word has length 86 [2020-12-17 20:46:58,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:46:58,251 INFO L481 AbstractCegarLoop]: Abstraction has 190907 states and 558551 transitions. [2020-12-17 20:46:58,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.684210526315789) internal successors, (89), 19 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:46:58,251 INFO L276 IsEmpty]: Start isEmpty. Operand 190907 states and 558551 transitions. [2020-12-17 20:46:58,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-17 20:46:58,546 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:46:58,546 INFO L504 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 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, 1] [2020-12-17 20:46:58,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:46:58,760 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:46:58,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:46:58,761 INFO L82 PathProgramCache]: Analyzing trace with hash -800382706, now seen corresponding path program 77 times [2020-12-17 20:46:58,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:46:58,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285619047] [2020-12-17 20:46:58,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:46:58,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:46:59,154 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:46:59,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285619047] [2020-12-17 20:46:59,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972874573] [2020-12-17 20:46:59,155 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 [2020-12-17 20:46:59,225 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-12-17 20:46:59,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:46:59,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-17 20:46:59,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:46:59,701 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:46:59,743 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:46:59,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:46:59,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-17 20:46:59,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095298474] [2020-12-17 20:46:59,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-17 20:46:59,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:46:59,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-17 20:46:59,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2020-12-17 20:46:59,752 INFO L87 Difference]: Start difference. First operand 190907 states and 558551 transitions. 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) [2020-12-17 20:47:02,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:47:02,808 INFO L93 Difference]: Finished difference Result 193403 states and 565911 transitions. [2020-12-17 20:47:02,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-17 20:47:02,809 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 91 [2020-12-17 20:47:02,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:47:02,810 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=663, Invalid=1499, Unknown=0, NotChecked=0, Total=2162 [2020-12-17 20:47:02,810 INFO L78 Accepts]: Start accepts. Automaton has 193403 states and 565911 transitions. Word has length 91 [2020-12-17 20:47:02,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:47:02,810 INFO L481 AbstractCegarLoop]: Abstraction has 193403 states and 565911 transitions. [2020-12-17 20:47:02,810 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) [2020-12-17 20:47:02,811 INFO L276 IsEmpty]: Start isEmpty. Operand 193403 states and 565911 transitions. [2020-12-17 20:47:03,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-17 20:47:03,172 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:47:03,172 INFO L504 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 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, 1] [2020-12-17 20:47:03,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2020-12-17 20:47:03,386 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:47:03,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:47:03,387 INFO L82 PathProgramCache]: Analyzing trace with hash 523642080, now seen corresponding path program 78 times [2020-12-17 20:47:03,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:47:03,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166581402] [2020-12-17 20:47:03,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:47:03,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:47:03,705 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 7 DAG size of output: 3 [2020-12-17 20:47:04,158 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2020-12-17 20:47:04,197 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:47:04,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166581402] [2020-12-17 20:47:04,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579416836] [2020-12-17 20:47:04,198 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 [2020-12-17 20:47:04,338 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-17 20:47:04,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:47:04,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-17 20:47:04,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:47:04,573 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:47:04,619 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:47:04,649 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:47:04,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:47:04,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2020-12-17 20:47:04,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309156293] [2020-12-17 20:47:04,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-17 20:47:04,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:47:04,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-17 20:47:04,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-12-17 20:47:04,652 INFO L87 Difference]: Start difference. First operand 193403 states and 565911 transitions. Second operand has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:47:07,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:47:07,652 INFO L93 Difference]: Finished difference Result 195643 states and 572503 transitions. [2020-12-17 20:47:07,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-17 20:47:07,653 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 states have internal predecessors, (95), 0 states have call successors, (0), 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 91 [2020-12-17 20:47:07,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:47:07,654 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=706, Invalid=1844, Unknown=0, NotChecked=0, Total=2550 [2020-12-17 20:47:07,654 INFO L78 Accepts]: Start accepts. Automaton has 195643 states and 572503 transitions. Word has length 91 [2020-12-17 20:47:07,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:47:07,654 INFO L481 AbstractCegarLoop]: Abstraction has 195643 states and 572503 transitions. [2020-12-17 20:47:07,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:47:07,654 INFO L276 IsEmpty]: Start isEmpty. Operand 195643 states and 572503 transitions. [2020-12-17 20:47:07,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-17 20:47:07,996 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:47:07,996 INFO L504 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 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, 1] [2020-12-17 20:47:08,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2020-12-17 20:47:08,211 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:47:08,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:47:08,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1634704890, now seen corresponding path program 79 times [2020-12-17 20:47:08,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:47:08,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606802983] [2020-12-17 20:47:08,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:47:08,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:47:08,516 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:47:08,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606802983] [2020-12-17 20:47:08,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244232149] [2020-12-17 20:47:08,516 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 [2020-12-17 20:47:08,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:47:08,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-17 20:47:08,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:47:08,635 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:47:08,656 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:47:08,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:47:08,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-17 20:47:08,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103938181] [2020-12-17 20:47:08,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-17 20:47:08,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:47:08,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-17 20:47:08,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2020-12-17 20:47:08,658 INFO L87 Difference]: Start difference. First operand 195643 states and 572503 transitions. 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) [2020-12-17 20:47:11,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:47:11,914 INFO L93 Difference]: Finished difference Result 197883 states and 579095 transitions. [2020-12-17 20:47:11,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-17 20:47:11,915 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 91 [2020-12-17 20:47:11,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:47:11,916 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=698, Invalid=1852, Unknown=0, NotChecked=0, Total=2550 [2020-12-17 20:47:11,916 INFO L78 Accepts]: Start accepts. Automaton has 197883 states and 579095 transitions. Word has length 91 [2020-12-17 20:47:11,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:47:11,916 INFO L481 AbstractCegarLoop]: Abstraction has 197883 states and 579095 transitions. [2020-12-17 20:47:11,916 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) [2020-12-17 20:47:11,916 INFO L276 IsEmpty]: Start isEmpty. Operand 197883 states and 579095 transitions. [2020-12-17 20:47:12,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-17 20:47:12,220 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:47:12,220 INFO L504 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 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, 1] [2020-12-17 20:47:12,433 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:47:12,434 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:47:12,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:47:12,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1956342582, now seen corresponding path program 80 times [2020-12-17 20:47:12,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:47:12,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343662674] [2020-12-17 20:47:12,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:47:12,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:47:12,801 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:47:12,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343662674] [2020-12-17 20:47:12,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351457247] [2020-12-17 20:47:12,802 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 [2020-12-17 20:47:12,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-17 20:47:12,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:47:12,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-17 20:47:12,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:47:12,909 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:47:12,967 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:47:12,988 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:47:12,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:47:12,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2020-12-17 20:47:12,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466655231] [2020-12-17 20:47:12,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-17 20:47:12,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:47:12,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-17 20:47:12,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2020-12-17 20:47:13,002 INFO L87 Difference]: Start difference. First operand 197883 states and 579095 transitions. Second operand has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:47:15,154 WARN L193 SmtUtils]: Spent 827.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-12-17 20:47:16,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:47:16,277 INFO L93 Difference]: Finished difference Result 201595 states and 589975 transitions. [2020-12-17 20:47:16,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-17 20:47:16,278 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 states have internal predecessors, (95), 0 states have call successors, (0), 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 91 [2020-12-17 20:47:16,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:47:16,279 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=787, Invalid=2075, Unknown=0, NotChecked=0, Total=2862 [2020-12-17 20:47:16,279 INFO L78 Accepts]: Start accepts. Automaton has 201595 states and 589975 transitions. Word has length 91 [2020-12-17 20:47:16,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:47:16,279 INFO L481 AbstractCegarLoop]: Abstraction has 201595 states and 589975 transitions. [2020-12-17 20:47:16,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:47:16,279 INFO L276 IsEmpty]: Start isEmpty. Operand 201595 states and 589975 transitions. [2020-12-17 20:47:16,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-17 20:47:16,513 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:47:16,513 INFO L504 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 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, 1] [2020-12-17 20:47:16,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:47:16,727 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:47:16,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:47:16,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1071498888, now seen corresponding path program 81 times [2020-12-17 20:47:16,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:47:16,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650512756] [2020-12-17 20:47:16,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:47:16,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:47:17,024 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:47:17,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650512756] [2020-12-17 20:47:17,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522307105] [2020-12-17 20:47:17,024 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 [2020-12-17 20:47:17,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-17 20:47:17,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:47:17,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-17 20:47:17,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:47:17,340 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:47:17,358 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:47:17,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:47:17,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-17 20:47:17,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881327375] [2020-12-17 20:47:17,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-17 20:47:17,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:47:17,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-17 20:47:17,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-12-17 20:47:17,360 INFO L87 Difference]: Start difference. First operand 201595 states and 589975 transitions. 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) [2020-12-17 20:47:20,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:47:20,104 INFO L93 Difference]: Finished difference Result 203835 states and 596567 transitions. [2020-12-17 20:47:20,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-17 20:47:20,105 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 91 [2020-12-17 20:47:20,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:47:20,106 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=792, Invalid=2070, Unknown=0, NotChecked=0, Total=2862 [2020-12-17 20:47:20,106 INFO L78 Accepts]: Start accepts. Automaton has 203835 states and 596567 transitions. Word has length 91 [2020-12-17 20:47:20,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:47:20,106 INFO L481 AbstractCegarLoop]: Abstraction has 203835 states and 596567 transitions. [2020-12-17 20:47:20,107 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) [2020-12-17 20:47:20,107 INFO L276 IsEmpty]: Start isEmpty. Operand 203835 states and 596567 transitions. [2020-12-17 20:47:20,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-17 20:47:20,373 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:47:20,373 INFO L504 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 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, 1] [2020-12-17 20:47:20,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:47:20,588 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:47:20,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:47:20,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1664715704, now seen corresponding path program 82 times [2020-12-17 20:47:20,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:47:20,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614168429] [2020-12-17 20:47:20,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:47:20,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:47:21,295 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:47:21,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614168429] [2020-12-17 20:47:21,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329909917] [2020-12-17 20:47:21,296 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 [2020-12-17 20:47:21,354 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-17 20:47:21,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:47:21,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-17 20:47:21,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:47:21,380 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:47:21,423 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:47:21,440 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:47:21,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:47:21,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2020-12-17 20:47:21,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641968355] [2020-12-17 20:47:21,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-17 20:47:21,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:47:21,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-17 20:47:21,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2020-12-17 20:47:21,442 INFO L87 Difference]: Start difference. First operand 203835 states and 596567 transitions. Second operand has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:47:24,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:47:24,168 INFO L93 Difference]: Finished difference Result 205819 states and 602391 transitions. [2020-12-17 20:47:24,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-17 20:47:24,169 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 states have internal predecessors, (95), 0 states have call successors, (0), 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 91 [2020-12-17 20:47:24,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:47:24,170 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=824, Invalid=2256, Unknown=0, NotChecked=0, Total=3080 [2020-12-17 20:47:24,170 INFO L78 Accepts]: Start accepts. Automaton has 205819 states and 602391 transitions. Word has length 91 [2020-12-17 20:47:24,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:47:24,170 INFO L481 AbstractCegarLoop]: Abstraction has 205819 states and 602391 transitions. [2020-12-17 20:47:24,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:47:24,170 INFO L276 IsEmpty]: Start isEmpty. Operand 205819 states and 602391 transitions.