/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-SemanticLbe.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-60729f1 [2020-11-11 21:17:43,007 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-11 21:17:43,013 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-11 21:17:43,066 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-11 21:17:43,067 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-11 21:17:43,071 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-11 21:17:43,074 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-11 21:17:43,081 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-11 21:17:43,084 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-11 21:17:43,090 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-11 21:17:43,091 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-11 21:17:43,092 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-11 21:17:43,093 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-11 21:17:43,096 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-11 21:17:43,097 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-11 21:17:43,099 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-11 21:17:43,100 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-11 21:17:43,103 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-11 21:17:43,109 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-11 21:17:43,111 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-11 21:17:43,113 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-11 21:17:43,114 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-11 21:17:43,115 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-11 21:17:43,116 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-11 21:17:43,119 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-11 21:17:43,119 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-11 21:17:43,120 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-11 21:17:43,121 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-11 21:17:43,121 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-11 21:17:43,122 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-11 21:17:43,122 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-11 21:17:43,123 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-11 21:17:43,124 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-11 21:17:43,125 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-11 21:17:43,126 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-11 21:17:43,126 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-11 21:17:43,127 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-11 21:17:43,127 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-11 21:17:43,128 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-11 21:17:43,129 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-11 21:17:43,129 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-11 21:17:43,130 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-SemanticLbe.epf [2020-11-11 21:17:43,157 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-11 21:17:43,157 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-11 21:17:43,159 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-11 21:17:43,159 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-11 21:17:43,159 INFO L138 SettingsManager]: * Use SBE=true [2020-11-11 21:17:43,159 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-11 21:17:43,159 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-11 21:17:43,160 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-11 21:17:43,160 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-11 21:17:43,160 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-11 21:17:43,160 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-11 21:17:43,161 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-11 21:17:43,161 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-11 21:17:43,161 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-11 21:17:43,161 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-11 21:17:43,161 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-11 21:17:43,162 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-11 21:17:43,162 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-11 21:17:43,162 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-11 21:17:43,162 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-11 21:17:43,163 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-11 21:17:43,163 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-11 21:17:43,163 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-11 21:17:43,163 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-11 21:17:43,163 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-11 21:17:43,164 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-11 21:17:43,164 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-11 21:17:43,164 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-11 21:17:43,164 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-11 21:17:43,528 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-11 21:17:43,555 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-11 21:17:43,558 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-11 21:17:43,559 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-11 21:17:43,560 INFO L275 PluginConnector]: CDTParser initialized [2020-11-11 21:17:43,561 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench-1.i [2020-11-11 21:17:43,644 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/087804828/9a9053d2265e4e48afd580a722ea19e2/FLAG9702d8192 [2020-11-11 21:17:44,446 INFO L306 CDTParser]: Found 1 translation units. [2020-11-11 21:17:44,446 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench-1.i [2020-11-11 21:17:44,467 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/087804828/9a9053d2265e4e48afd580a722ea19e2/FLAG9702d8192 [2020-11-11 21:17:44,689 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/087804828/9a9053d2265e4e48afd580a722ea19e2 [2020-11-11 21:17:44,692 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-11 21:17:44,699 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-11 21:17:44,701 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-11 21:17:44,701 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-11 21:17:44,705 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-11 21:17:44,705 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 09:17:44" (1/1) ... [2020-11-11 21:17:44,709 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45247e50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:17:44, skipping insertion in model container [2020-11-11 21:17:44,709 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 09:17:44" (1/1) ... [2020-11-11 21:17:44,717 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-11 21:17:44,758 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-11 21:17:45,086 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-11 21:17:45,096 INFO L203 MainTranslator]: Completed pre-run [2020-11-11 21:17:45,140 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-11 21:17:45,234 INFO L208 MainTranslator]: Completed translation [2020-11-11 21:17:45,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:17:45 WrapperNode [2020-11-11 21:17:45,235 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-11 21:17:45,237 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-11 21:17:45,237 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-11 21:17:45,237 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-11 21:17:45,245 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:17:45" (1/1) ... [2020-11-11 21:17:45,269 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:17:45" (1/1) ... [2020-11-11 21:17:45,289 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-11 21:17:45,290 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-11 21:17:45,290 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-11 21:17:45,291 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-11 21:17:45,300 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:17:45" (1/1) ... [2020-11-11 21:17:45,301 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:17:45" (1/1) ... [2020-11-11 21:17:45,304 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:17:45" (1/1) ... [2020-11-11 21:17:45,304 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:17:45" (1/1) ... [2020-11-11 21:17:45,310 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:17:45" (1/1) ... [2020-11-11 21:17:45,314 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:17:45" (1/1) ... [2020-11-11 21:17:45,316 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:17:45" (1/1) ... [2020-11-11 21:17:45,319 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-11 21:17:45,320 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-11 21:17:45,320 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-11 21:17:45,320 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-11 21:17:45,321 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:17:45" (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 [2020-11-11 21:17:45,402 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-11-11 21:17:45,402 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-11-11 21:17:45,402 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-11-11 21:17:45,402 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-11-11 21:17:45,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-11 21:17:45,403 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-11-11 21:17:45,404 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-11 21:17:45,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-11 21:17:45,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-11 21:17:45,405 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-11-11 21:17:45,406 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-11 21:17:45,406 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-11 21:17:45,408 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-11-11 21:17:45,745 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-11 21:17:45,745 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-11-11 21:17:45,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 09:17:45 BoogieIcfgContainer [2020-11-11 21:17:45,747 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-11 21:17:45,749 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-11 21:17:45,749 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-11 21:17:45,753 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-11 21:17:45,753 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.11 09:17:44" (1/3) ... [2020-11-11 21:17:45,754 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b07c2df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.11 09:17:45, skipping insertion in model container [2020-11-11 21:17:45,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:17:45" (2/3) ... [2020-11-11 21:17:45,755 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b07c2df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.11 09:17:45, skipping insertion in model container [2020-11-11 21:17:45,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 09:17:45" (3/3) ... [2020-11-11 21:17:45,756 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench-1.i [2020-11-11 21:17:45,772 WARN L168 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-11-11 21:17:45,772 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-11 21:17:45,775 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-11 21:17:45,776 INFO L351 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-11-11 21:17:45,833 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:45,834 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:45,834 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:45,834 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:45,834 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:45,835 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:45,835 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:45,835 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:45,835 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:45,836 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:45,836 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:45,836 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:45,837 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:45,837 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:45,837 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:45,837 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:45,838 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:45,838 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:45,838 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:45,838 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:45,839 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:45,839 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:45,839 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:45,840 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:45,840 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:45,840 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:45,840 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:45,843 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:45,843 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:45,844 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:45,844 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:45,844 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:45,844 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:45,845 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:45,845 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:45,845 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:45,845 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:45,846 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:45,846 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:45,846 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:45,847 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:45,847 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:45,847 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:45,847 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:45,848 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:45,848 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:45,848 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:45,848 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:45,849 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:45,849 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:45,849 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:45,850 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:45,850 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:45,850 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:45,850 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:45,850 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:45,851 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:45,851 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:45,851 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:45,852 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:45,854 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:45,854 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:45,854 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:45,855 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:45,855 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:45,855 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:45,860 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:45,861 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:45,861 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:45,861 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:45,862 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:45,862 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:45,864 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-11-11 21:17:45,878 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-11-11 21:17:45,901 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-11 21:17:45,902 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-11 21:17:45,902 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-11 21:17:45,902 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-11 21:17:45,902 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-11 21:17:45,902 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-11 21:17:45,902 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-11 21:17:45,903 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-11 21:17:45,914 INFO L120 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-11-11 21:17:45,917 INFO L135 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 67 places, 66 transitions, 142 flow [2020-11-11 21:17:45,920 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 67 places, 66 transitions, 142 flow [2020-11-11 21:17:45,922 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 67 places, 66 transitions, 142 flow [2020-11-11 21:17:45,985 INFO L129 PetriNetUnfolder]: 6/64 cut-off events. [2020-11-11 21:17:45,985 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-11-11 21:17:45,990 INFO L84 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 64 events. 6/64 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 108 event pairs, 0 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 48. Up to 2 conditions per place. [2020-11-11 21:17:45,993 INFO L116 LiptonReduction]: Number of co-enabled transitions 1272 [2020-11-11 21:17:48,871 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2020-11-11 21:17:49,408 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 87 [2020-11-11 21:17:49,544 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-11-11 21:17:49,850 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 87 [2020-11-11 21:17:50,000 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-11-11 21:17:50,024 INFO L131 LiptonReduction]: Checked pairs total: 1222 [2020-11-11 21:17:50,024 INFO L133 LiptonReduction]: Total number of compositions: 61 [2020-11-11 21:17:50,031 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-11-11 21:17:50,041 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 44 states, 42 states have (on average 2.6904761904761907) internal successors, (113), 43 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:50,044 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 42 states have (on average 2.6904761904761907) internal successors, (113), 43 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:50,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-11 21:17:50,050 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:17:50,050 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-11 21:17:50,051 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:17:50,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:17:50,057 INFO L82 PathProgramCache]: Analyzing trace with hash -542665776, now seen corresponding path program 1 times [2020-11-11 21:17:50,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:17:50,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884286926] [2020-11-11 21:17:50,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:17:50,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:17:50,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:17:50,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884286926] [2020-11-11 21:17:50,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 21:17:50,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-11 21:17:50,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582576381] [2020-11-11 21:17:50,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-11 21:17:50,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:17:50,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-11 21:17:50,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-11 21:17:50,293 INFO L87 Difference]: Start difference. First operand has 44 states, 42 states have (on average 2.6904761904761907) internal successors, (113), 43 states have internal predecessors, (113), 0 states have call successors, (0), 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 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:50,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:17:50,366 INFO L93 Difference]: Finished difference Result 83 states and 212 transitions. [2020-11-11 21:17:50,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-11 21:17:50,368 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2020-11-11 21:17:50,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:17:50,379 INFO L225 Difference]: With dead ends: 83 [2020-11-11 21:17:50,379 INFO L226 Difference]: Without dead ends: 54 [2020-11-11 21:17:50,381 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-11 21:17:50,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-11-11 21:17:50,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-11-11 21:17:50,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 2.4489795918367347) internal successors, (120), 49 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:50,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 120 transitions. [2020-11-11 21:17:50,421 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 120 transitions. Word has length 6 [2020-11-11 21:17:50,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:17:50,422 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 120 transitions. [2020-11-11 21:17:50,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:50,422 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 120 transitions. [2020-11-11 21:17:50,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-11 21:17:50,423 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:17:50,423 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:17:50,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-11 21:17:50,424 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:17:50,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:17:50,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1810228872, now seen corresponding path program 1 times [2020-11-11 21:17:50,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:17:50,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60955205] [2020-11-11 21:17:50,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:17:50,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:17:50,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:17:50,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60955205] [2020-11-11 21:17:50,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 21:17:50,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-11 21:17:50,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284711484] [2020-11-11 21:17:50,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-11 21:17:50,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:17:50,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-11 21:17:50,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-11 21:17:50,565 INFO L87 Difference]: Start difference. First operand 50 states and 120 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:50,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:17:50,665 INFO L93 Difference]: Finished difference Result 70 states and 166 transitions. [2020-11-11 21:17:50,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-11 21:17:50,669 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2020-11-11 21:17:50,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:17:50,670 INFO L225 Difference]: With dead ends: 70 [2020-11-11 21:17:50,671 INFO L226 Difference]: Without dead ends: 64 [2020-11-11 21:17:50,671 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-11-11 21:17:50,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-11-11 21:17:50,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 58. [2020-11-11 21:17:50,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.473684210526316) internal successors, (141), 57 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:50,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 141 transitions. [2020-11-11 21:17:50,682 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 141 transitions. Word has length 8 [2020-11-11 21:17:50,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:17:50,683 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 141 transitions. [2020-11-11 21:17:50,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:50,683 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 141 transitions. [2020-11-11 21:17:50,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-11 21:17:50,684 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:17:50,684 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:17:50,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-11 21:17:50,684 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:17:50,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:17:50,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1810289415, now seen corresponding path program 1 times [2020-11-11 21:17:50,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:17:50,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60573489] [2020-11-11 21:17:50,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:17:50,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:17:50,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:17:50,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60573489] [2020-11-11 21:17:50,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 21:17:50,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-11 21:17:50,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770279487] [2020-11-11 21:17:50,753 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-11 21:17:50,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:17:50,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-11 21:17:50,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-11 21:17:50,755 INFO L87 Difference]: Start difference. First operand 58 states and 141 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:50,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:17:50,843 INFO L93 Difference]: Finished difference Result 88 states and 205 transitions. [2020-11-11 21:17:50,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-11 21:17:50,844 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2020-11-11 21:17:50,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:17:50,845 INFO L225 Difference]: With dead ends: 88 [2020-11-11 21:17:50,845 INFO L226 Difference]: Without dead ends: 83 [2020-11-11 21:17:50,846 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-11-11 21:17:50,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-11-11 21:17:50,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 66. [2020-11-11 21:17:50,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.4153846153846152) internal successors, (157), 65 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:50,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 157 transitions. [2020-11-11 21:17:50,857 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 157 transitions. Word has length 8 [2020-11-11 21:17:50,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:17:50,857 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 157 transitions. [2020-11-11 21:17:50,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:50,858 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 157 transitions. [2020-11-11 21:17:50,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-11 21:17:50,859 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:17:50,859 INFO L494 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:17:50,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-11 21:17:50,859 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:17:50,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:17:50,860 INFO L82 PathProgramCache]: Analyzing trace with hash -282495891, now seen corresponding path program 2 times [2020-11-11 21:17:50,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:17:50,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686760434] [2020-11-11 21:17:50,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:17:50,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:17:50,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:17:50,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686760434] [2020-11-11 21:17:50,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125858268] [2020-11-11 21:17:50,955 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 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 [2020-11-11 21:17:51,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:17:51,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:17:51,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-11 21:17:51,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:17:51,231 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2020-11-11 21:17:51,287 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:17:51,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:17:51,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:17:51,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-11-11 21:17:51,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139444739] [2020-11-11 21:17:51,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-11 21:17:51,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:17:51,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-11 21:17:51,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-11-11 21:17:51,311 INFO L87 Difference]: Start difference. First operand 66 states and 157 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:51,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:17:51,470 INFO L93 Difference]: Finished difference Result 91 states and 215 transitions. [2020-11-11 21:17:51,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-11 21:17:51,471 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 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 9 [2020-11-11 21:17:51,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:17:51,472 INFO L225 Difference]: With dead ends: 91 [2020-11-11 21:17:51,473 INFO L226 Difference]: Without dead ends: 85 [2020-11-11 21:17:51,473 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-11-11 21:17:51,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-11-11 21:17:51,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 72. [2020-11-11 21:17:51,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.4507042253521125) internal successors, (174), 71 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:51,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 174 transitions. [2020-11-11 21:17:51,483 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 174 transitions. Word has length 9 [2020-11-11 21:17:51,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:17:51,484 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 174 transitions. [2020-11-11 21:17:51,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:51,484 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 174 transitions. [2020-11-11 21:17:51,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-11 21:17:51,487 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:17:51,487 INFO L494 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:17:51,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:17:51,701 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:17:51,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:17:51,702 INFO L82 PathProgramCache]: Analyzing trace with hash -284373685, now seen corresponding path program 2 times [2020-11-11 21:17:51,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:17:51,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149471313] [2020-11-11 21:17:51,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:17:51,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:17:51,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:17:51,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149471313] [2020-11-11 21:17:51,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661898768] [2020-11-11 21:17:51,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:17:51,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:17:51,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:17:51,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-11 21:17:51,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:17:51,986 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:17:51,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:17:51,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:17:51,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-11-11 21:17:51,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191517396] [2020-11-11 21:17:51,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-11 21:17:51,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:17:51,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-11 21:17:51,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-11-11 21:17:52,000 INFO L87 Difference]: Start difference. First operand 72 states and 174 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:52,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:17:52,119 INFO L93 Difference]: Finished difference Result 107 states and 252 transitions. [2020-11-11 21:17:52,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-11 21:17:52,120 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 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 9 [2020-11-11 21:17:52,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:17:52,122 INFO L225 Difference]: With dead ends: 107 [2020-11-11 21:17:52,122 INFO L226 Difference]: Without dead ends: 102 [2020-11-11 21:17:52,122 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-11-11 21:17:52,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-11-11 21:17:52,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 77. [2020-11-11 21:17:52,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.5) internal successors, (190), 76 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:52,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 190 transitions. [2020-11-11 21:17:52,131 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 190 transitions. Word has length 9 [2020-11-11 21:17:52,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:17:52,132 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 190 transitions. [2020-11-11 21:17:52,132 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:52,132 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 190 transitions. [2020-11-11 21:17:52,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-11 21:17:52,133 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:17:52,133 INFO L494 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:17:52,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:17:52,347 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:17:52,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:17:52,348 INFO L82 PathProgramCache]: Analyzing trace with hash -167413736, now seen corresponding path program 3 times [2020-11-11 21:17:52,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:17:52,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230309946] [2020-11-11 21:17:52,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:17:52,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:17:52,440 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:17:52,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230309946] [2020-11-11 21:17:52,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200722077] [2020-11-11 21:17:52,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:17:52,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-11 21:17:52,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:17:52,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-11 21:17:52,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:17:52,601 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:17:52,620 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:17:52,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:17:52,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-11-11 21:17:52,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110899976] [2020-11-11 21:17:52,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-11 21:17:52,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:17:52,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-11 21:17:52,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-11-11 21:17:52,623 INFO L87 Difference]: Start difference. First operand 77 states and 190 transitions. Second operand has 11 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:52,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:17:52,839 INFO L93 Difference]: Finished difference Result 104 states and 250 transitions. [2020-11-11 21:17:52,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-11 21:17:52,840 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 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 10 [2020-11-11 21:17:52,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:17:52,842 INFO L225 Difference]: With dead ends: 104 [2020-11-11 21:17:52,842 INFO L226 Difference]: Without dead ends: 98 [2020-11-11 21:17:52,845 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2020-11-11 21:17:52,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-11-11 21:17:52,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 83. [2020-11-11 21:17:52,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.524390243902439) internal successors, (207), 82 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:52,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 207 transitions. [2020-11-11 21:17:52,859 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 207 transitions. Word has length 10 [2020-11-11 21:17:52,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:17:52,859 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 207 transitions. [2020-11-11 21:17:52,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:52,859 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 207 transitions. [2020-11-11 21:17:52,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-11 21:17:52,864 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:17:52,864 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:17:53,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:17:53,079 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:17:53,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:17:53,081 INFO L82 PathProgramCache]: Analyzing trace with hash -167712607, now seen corresponding path program 1 times [2020-11-11 21:17:53,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:17:53,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948562904] [2020-11-11 21:17:53,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:17:53,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:17:53,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:17:53,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948562904] [2020-11-11 21:17:53,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 21:17:53,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-11 21:17:53,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443767137] [2020-11-11 21:17:53,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-11 21:17:53,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:17:53,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-11 21:17:53,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-11 21:17:53,192 INFO L87 Difference]: Start difference. First operand 83 states and 207 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:53,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:17:53,311 INFO L93 Difference]: Finished difference Result 109 states and 259 transitions. [2020-11-11 21:17:53,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-11 21:17:53,312 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2020-11-11 21:17:53,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:17:53,313 INFO L225 Difference]: With dead ends: 109 [2020-11-11 21:17:53,313 INFO L226 Difference]: Without dead ends: 104 [2020-11-11 21:17:53,314 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-11-11 21:17:53,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-11-11 21:17:53,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 84. [2020-11-11 21:17:53,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.5060240963855422) internal successors, (208), 83 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:53,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 208 transitions. [2020-11-11 21:17:53,321 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 208 transitions. Word has length 10 [2020-11-11 21:17:53,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:17:53,321 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 208 transitions. [2020-11-11 21:17:53,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:53,322 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 208 transitions. [2020-11-11 21:17:53,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-11 21:17:53,322 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:17:53,323 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:17:53,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-11 21:17:53,323 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:17:53,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:17:53,323 INFO L82 PathProgramCache]: Analyzing trace with hash -191723347, now seen corresponding path program 2 times [2020-11-11 21:17:53,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:17:53,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010661988] [2020-11-11 21:17:53,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:17:53,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:17:53,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:17:53,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010661988] [2020-11-11 21:17:53,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 21:17:53,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-11 21:17:53,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72173850] [2020-11-11 21:17:53,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-11 21:17:53,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:17:53,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-11 21:17:53,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-11 21:17:53,382 INFO L87 Difference]: Start difference. First operand 84 states and 208 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:53,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:17:53,448 INFO L93 Difference]: Finished difference Result 100 states and 240 transitions. [2020-11-11 21:17:53,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-11 21:17:53,449 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2020-11-11 21:17:53,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:17:53,450 INFO L225 Difference]: With dead ends: 100 [2020-11-11 21:17:53,450 INFO L226 Difference]: Without dead ends: 98 [2020-11-11 21:17:53,450 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-11-11 21:17:53,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-11-11 21:17:53,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 86. [2020-11-11 21:17:53,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.4941176470588236) internal successors, (212), 85 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:53,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 212 transitions. [2020-11-11 21:17:53,457 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 212 transitions. Word has length 10 [2020-11-11 21:17:53,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:17:53,458 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 212 transitions. [2020-11-11 21:17:53,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:53,458 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 212 transitions. [2020-11-11 21:17:53,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-11 21:17:53,459 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:17:53,459 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:17:53,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-11 21:17:53,459 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:17:53,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:17:53,460 INFO L82 PathProgramCache]: Analyzing trace with hash -176678737, now seen corresponding path program 3 times [2020-11-11 21:17:53,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:17:53,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338348498] [2020-11-11 21:17:53,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:17:53,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:17:53,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:17:53,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338348498] [2020-11-11 21:17:53,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 21:17:53,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-11 21:17:53,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627345213] [2020-11-11 21:17:53,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-11 21:17:53,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:17:53,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-11 21:17:53,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-11 21:17:53,521 INFO L87 Difference]: Start difference. First operand 86 states and 212 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:53,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:17:53,648 INFO L93 Difference]: Finished difference Result 115 states and 271 transitions. [2020-11-11 21:17:53,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-11 21:17:53,648 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2020-11-11 21:17:53,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:17:53,650 INFO L225 Difference]: With dead ends: 115 [2020-11-11 21:17:53,650 INFO L226 Difference]: Without dead ends: 110 [2020-11-11 21:17:53,650 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-11-11 21:17:53,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-11-11 21:17:53,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 89. [2020-11-11 21:17:53,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 2.4545454545454546) internal successors, (216), 88 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:53,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 216 transitions. [2020-11-11 21:17:53,662 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 216 transitions. Word has length 10 [2020-11-11 21:17:53,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:17:53,662 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 216 transitions. [2020-11-11 21:17:53,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:53,663 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 216 transitions. [2020-11-11 21:17:53,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-11 21:17:53,663 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:17:53,664 INFO L494 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:17:53,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-11 21:17:53,664 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:17:53,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:17:53,666 INFO L82 PathProgramCache]: Analyzing trace with hash -225626311, now seen corresponding path program 3 times [2020-11-11 21:17:53,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:17:53,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004745453] [2020-11-11 21:17:53,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:17:53,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:17:53,756 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:17:53,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004745453] [2020-11-11 21:17:53,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005752501] [2020-11-11 21:17:53,757 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 [2020-11-11 21:17:53,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-11 21:17:53,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:17:53,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-11 21:17:53,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:17:53,897 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:17:53,911 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:17:53,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:17:53,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-11-11 21:17:53,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863728796] [2020-11-11 21:17:53,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-11 21:17:53,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:17:53,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-11 21:17:53,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-11-11 21:17:53,914 INFO L87 Difference]: Start difference. First operand 89 states and 216 transitions. Second operand has 11 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:54,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:17:54,141 INFO L93 Difference]: Finished difference Result 128 states and 301 transitions. [2020-11-11 21:17:54,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-11 21:17:54,142 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 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 10 [2020-11-11 21:17:54,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:17:54,143 INFO L225 Difference]: With dead ends: 128 [2020-11-11 21:17:54,144 INFO L226 Difference]: Without dead ends: 123 [2020-11-11 21:17:54,144 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2020-11-11 21:17:54,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-11-11 21:17:54,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 94. [2020-11-11 21:17:54,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.4946236559139785) internal successors, (232), 93 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:54,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 232 transitions. [2020-11-11 21:17:54,157 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 232 transitions. Word has length 10 [2020-11-11 21:17:54,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:17:54,158 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 232 transitions. [2020-11-11 21:17:54,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:54,158 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 232 transitions. [2020-11-11 21:17:54,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-11 21:17:54,159 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:17:54,159 INFO L494 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:17:54,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:17:54,372 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:17:54,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:17:54,373 INFO L82 PathProgramCache]: Analyzing trace with hash -894834227, now seen corresponding path program 4 times [2020-11-11 21:17:54,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:17:54,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192910069] [2020-11-11 21:17:54,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:17:54,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:17:54,464 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:17:54,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192910069] [2020-11-11 21:17:54,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46840642] [2020-11-11 21:17:54,465 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 [2020-11-11 21:17:54,520 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 21:17:54,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:17:54,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-11 21:17:54,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:17:54,640 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:17:54,657 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:17:54,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:17:54,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-11-11 21:17:54,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427852] [2020-11-11 21:17:54,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 21:17:54,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:17:54,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 21:17:54,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-11-11 21:17:54,660 INFO L87 Difference]: Start difference. First operand 94 states and 232 transitions. Second operand has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:54,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:17:54,953 INFO L93 Difference]: Finished difference Result 129 states and 307 transitions. [2020-11-11 21:17:54,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-11 21:17:54,954 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 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 11 [2020-11-11 21:17:54,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:17:54,956 INFO L225 Difference]: With dead ends: 129 [2020-11-11 21:17:54,956 INFO L226 Difference]: Without dead ends: 123 [2020-11-11 21:17:54,956 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=317, Unknown=0, NotChecked=0, Total=462 [2020-11-11 21:17:54,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-11-11 21:17:54,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 100. [2020-11-11 21:17:54,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.515151515151515) internal successors, (249), 99 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:54,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 249 transitions. [2020-11-11 21:17:54,962 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 249 transitions. Word has length 11 [2020-11-11 21:17:54,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:17:54,962 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 249 transitions. [2020-11-11 21:17:54,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:54,962 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 249 transitions. [2020-11-11 21:17:54,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-11 21:17:54,963 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:17:54,963 INFO L494 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:17:55,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-11-11 21:17:55,176 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:17:55,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:17:55,177 INFO L82 PathProgramCache]: Analyzing trace with hash -895133098, now seen corresponding path program 4 times [2020-11-11 21:17:55,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:17:55,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832726491] [2020-11-11 21:17:55,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:17:55,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:17:55,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:17:55,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832726491] [2020-11-11 21:17:55,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081468537] [2020-11-11 21:17:55,264 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 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 [2020-11-11 21:17:55,321 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 21:17:55,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:17:55,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-11 21:17:55,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:17:55,413 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:17:55,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:17:55,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:17:55,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-11-11 21:17:55,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294670380] [2020-11-11 21:17:55,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-11 21:17:55,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:17:55,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-11 21:17:55,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-11-11 21:17:55,433 INFO L87 Difference]: Start difference. First operand 100 states and 249 transitions. Second operand has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:55,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:17:55,748 INFO L93 Difference]: Finished difference Result 135 states and 320 transitions. [2020-11-11 21:17:55,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-11 21:17:55,749 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 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 11 [2020-11-11 21:17:55,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:17:55,751 INFO L225 Difference]: With dead ends: 135 [2020-11-11 21:17:55,751 INFO L226 Difference]: Without dead ends: 130 [2020-11-11 21:17:55,752 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2020-11-11 21:17:55,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-11-11 21:17:55,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 100. [2020-11-11 21:17:55,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.515151515151515) internal successors, (249), 99 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:55,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 249 transitions. [2020-11-11 21:17:55,757 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 249 transitions. Word has length 11 [2020-11-11 21:17:55,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:17:55,757 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 249 transitions. [2020-11-11 21:17:55,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:55,758 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 249 transitions. [2020-11-11 21:17:55,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-11 21:17:55,759 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:17:55,759 INFO L494 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:17:55,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:17:55,972 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:17:55,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:17:55,973 INFO L82 PathProgramCache]: Analyzing trace with hash -919143838, now seen corresponding path program 5 times [2020-11-11 21:17:55,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:17:55,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490597733] [2020-11-11 21:17:55,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:17:55,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:17:56,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:17:56,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490597733] [2020-11-11 21:17:56,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724324386] [2020-11-11 21:17:56,047 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 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 [2020-11-11 21:17:56,110 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:17:56,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:17:56,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-11 21:17:56,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:17:56,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:17:56,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:17:56,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-11-11 21:17:56,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17775300] [2020-11-11 21:17:56,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-11 21:17:56,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:17:56,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-11 21:17:56,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-11-11 21:17:56,207 INFO L87 Difference]: Start difference. First operand 100 states and 249 transitions. Second operand has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:56,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:17:56,365 INFO L93 Difference]: Finished difference Result 126 states and 299 transitions. [2020-11-11 21:17:56,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-11 21:17:56,366 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 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 11 [2020-11-11 21:17:56,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:17:56,367 INFO L225 Difference]: With dead ends: 126 [2020-11-11 21:17:56,367 INFO L226 Difference]: Without dead ends: 124 [2020-11-11 21:17:56,368 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:17:56,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-11-11 21:17:56,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 103. [2020-11-11 21:17:56,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.5098039215686274) internal successors, (256), 102 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:56,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 256 transitions. [2020-11-11 21:17:56,374 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 256 transitions. Word has length 11 [2020-11-11 21:17:56,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:17:56,374 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 256 transitions. [2020-11-11 21:17:56,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:56,374 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 256 transitions. [2020-11-11 21:17:56,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-11 21:17:56,375 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:17:56,375 INFO L494 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:17:56,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:17:56,577 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:17:56,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:17:56,578 INFO L82 PathProgramCache]: Analyzing trace with hash -904100189, now seen corresponding path program 6 times [2020-11-11 21:17:56,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:17:56,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650827353] [2020-11-11 21:17:56,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:17:56,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:17:56,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:17:56,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650827353] [2020-11-11 21:17:56,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81827679] [2020-11-11 21:17:56,651 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 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 [2020-11-11 21:17:56,716 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-11-11 21:17:56,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:17:56,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-11 21:17:56,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:17:56,803 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:17:56,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:17:56,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:17:56,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-11-11 21:17:56,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120009814] [2020-11-11 21:17:56,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-11 21:17:56,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:17:56,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-11 21:17:56,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-11-11 21:17:56,819 INFO L87 Difference]: Start difference. First operand 103 states and 256 transitions. Second operand has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:57,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:17:57,088 INFO L93 Difference]: Finished difference Result 152 states and 356 transitions. [2020-11-11 21:17:57,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-11 21:17:57,088 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 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 11 [2020-11-11 21:17:57,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:17:57,090 INFO L225 Difference]: With dead ends: 152 [2020-11-11 21:17:57,093 INFO L226 Difference]: Without dead ends: 147 [2020-11-11 21:17:57,094 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2020-11-11 21:17:57,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-11-11 21:17:57,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 104. [2020-11-11 21:17:57,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.495145631067961) internal successors, (257), 103 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:57,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 257 transitions. [2020-11-11 21:17:57,102 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 257 transitions. Word has length 11 [2020-11-11 21:17:57,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:17:57,103 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 257 transitions. [2020-11-11 21:17:57,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:57,103 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 257 transitions. [2020-11-11 21:17:57,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-11 21:17:57,104 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:17:57,104 INFO L494 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:17:57,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-11-11 21:17:57,305 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:17:57,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:17:57,306 INFO L82 PathProgramCache]: Analyzing trace with hash -904099228, now seen corresponding path program 7 times [2020-11-11 21:17:57,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:17:57,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684916880] [2020-11-11 21:17:57,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:17:57,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:17:57,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:17:57,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684916880] [2020-11-11 21:17:57,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105630051] [2020-11-11 21:17:57,385 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 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 [2020-11-11 21:17:57,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:17:57,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-11 21:17:57,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:17:57,526 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:17:57,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:17:57,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:17:57,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-11-11 21:17:57,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168105464] [2020-11-11 21:17:57,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-11 21:17:57,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:17:57,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-11 21:17:57,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-11-11 21:17:57,540 INFO L87 Difference]: Start difference. First operand 104 states and 257 transitions. Second operand has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:57,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:17:57,917 INFO L93 Difference]: Finished difference Result 166 states and 386 transitions. [2020-11-11 21:17:57,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-11 21:17:57,917 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 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 11 [2020-11-11 21:17:57,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:17:57,919 INFO L225 Difference]: With dead ends: 166 [2020-11-11 21:17:57,920 INFO L226 Difference]: Without dead ends: 158 [2020-11-11 21:17:57,921 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2020-11-11 21:17:57,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-11-11 21:17:57,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 107. [2020-11-11 21:17:57,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.4622641509433962) internal successors, (261), 106 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:57,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 261 transitions. [2020-11-11 21:17:57,927 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 261 transitions. Word has length 11 [2020-11-11 21:17:57,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:17:57,927 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 261 transitions. [2020-11-11 21:17:57,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:57,927 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 261 transitions. [2020-11-11 21:17:57,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-11 21:17:57,928 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:17:57,928 INFO L494 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:17:58,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-11-11 21:17:58,143 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:17:58,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:17:58,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1182050219, now seen corresponding path program 8 times [2020-11-11 21:17:58,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:17:58,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875827180] [2020-11-11 21:17:58,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:17:58,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:17:58,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:17:58,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875827180] [2020-11-11 21:17:58,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129764261] [2020-11-11 21:17:58,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:17:58,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:17:58,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:17:58,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-11 21:17:58,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:17:58,355 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:17:58,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:17:58,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:17:58,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-11-11 21:17:58,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882123177] [2020-11-11 21:17:58,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-11 21:17:58,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:17:58,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-11 21:17:58,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-11-11 21:17:58,368 INFO L87 Difference]: Start difference. First operand 107 states and 261 transitions. Second operand has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:58,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:17:58,715 INFO L93 Difference]: Finished difference Result 142 states and 336 transitions. [2020-11-11 21:17:58,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-11 21:17:58,715 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 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 11 [2020-11-11 21:17:58,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:17:58,717 INFO L225 Difference]: With dead ends: 142 [2020-11-11 21:17:58,717 INFO L226 Difference]: Without dead ends: 137 [2020-11-11 21:17:58,718 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2020-11-11 21:17:58,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-11-11 21:17:58,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 107. [2020-11-11 21:17:58,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.4622641509433962) internal successors, (261), 106 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:58,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 261 transitions. [2020-11-11 21:17:58,722 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 261 transitions. Word has length 11 [2020-11-11 21:17:58,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:17:58,723 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 261 transitions. [2020-11-11 21:17:58,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:58,723 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 261 transitions. [2020-11-11 21:17:58,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-11 21:17:58,723 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:17:58,723 INFO L494 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:17:58,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-11 21:17:58,935 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:17:58,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:17:58,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1595542283, now seen corresponding path program 4 times [2020-11-11 21:17:58,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:17:58,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831933781] [2020-11-11 21:17:58,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:17:58,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:17:59,024 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:17:59,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831933781] [2020-11-11 21:17:59,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509082221] [2020-11-11 21:17:59,024 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:17:59,107 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 21:17:59,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:17:59,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-11 21:17:59,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:17:59,215 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:17:59,228 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:17:59,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:17:59,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-11-11 21:17:59,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887456068] [2020-11-11 21:17:59,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 21:17:59,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:17:59,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 21:17:59,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-11-11 21:17:59,231 INFO L87 Difference]: Start difference. First operand 107 states and 261 transitions. Second operand has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:59,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:17:59,505 INFO L93 Difference]: Finished difference Result 150 states and 355 transitions. [2020-11-11 21:17:59,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-11 21:17:59,506 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 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 11 [2020-11-11 21:17:59,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:17:59,508 INFO L225 Difference]: With dead ends: 150 [2020-11-11 21:17:59,508 INFO L226 Difference]: Without dead ends: 145 [2020-11-11 21:17:59,509 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=317, Unknown=0, NotChecked=0, Total=462 [2020-11-11 21:17:59,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-11-11 21:17:59,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 113. [2020-11-11 21:17:59,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.517857142857143) internal successors, (282), 112 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:59,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 282 transitions. [2020-11-11 21:17:59,514 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 282 transitions. Word has length 11 [2020-11-11 21:17:59,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:17:59,514 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 282 transitions. [2020-11-11 21:17:59,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:17:59,514 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 282 transitions. [2020-11-11 21:17:59,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-11 21:17:59,515 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:17:59,515 INFO L494 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:17:59,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-11 21:17:59,728 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:17:59,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:17:59,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1970032968, now seen corresponding path program 5 times [2020-11-11 21:17:59,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:17:59,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153282942] [2020-11-11 21:17:59,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:17:59,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:17:59,848 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:17:59,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153282942] [2020-11-11 21:17:59,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229550713] [2020-11-11 21:17:59,849 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:17:59,905 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-11 21:17:59,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:17:59,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:17:59,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:18:00,049 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:18:00,068 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:18:00,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:18:00,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:18:00,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065474164] [2020-11-11 21:18:00,069 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:18:00,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:18:00,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:18:00,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:18:00,070 INFO L87 Difference]: Start difference. First operand 113 states and 282 transitions. Second operand has 15 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:00,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:18:00,456 INFO L93 Difference]: Finished difference Result 155 states and 369 transitions. [2020-11-11 21:18:00,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-11 21:18:00,457 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 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 12 [2020-11-11 21:18:00,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:18:00,458 INFO L225 Difference]: With dead ends: 155 [2020-11-11 21:18:00,459 INFO L226 Difference]: Without dead ends: 149 [2020-11-11 21:18:00,459 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=198, Invalid=452, Unknown=0, NotChecked=0, Total=650 [2020-11-11 21:18:00,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-11-11 21:18:00,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 119. [2020-11-11 21:18:00,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.5338983050847457) internal successors, (299), 118 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:00,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 299 transitions. [2020-11-11 21:18:00,465 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 299 transitions. Word has length 12 [2020-11-11 21:18:00,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:18:00,465 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 299 transitions. [2020-11-11 21:18:00,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:00,466 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 299 transitions. [2020-11-11 21:18:00,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-11 21:18:00,466 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:18:00,466 INFO L494 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:18:00,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-11 21:18:00,680 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:18:00,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:18:00,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1970331839, now seen corresponding path program 9 times [2020-11-11 21:18:00,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:18:00,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234679710] [2020-11-11 21:18:00,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:18:00,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:18:00,767 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:18:00,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234679710] [2020-11-11 21:18:00,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29725533] [2020-11-11 21:18:00,768 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 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 [2020-11-11 21:18:00,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-11 21:18:00,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:18:00,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-11 21:18:00,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:18:00,939 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:18:00,955 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:18:00,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:18:00,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-11-11 21:18:00,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229599833] [2020-11-11 21:18:00,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 21:18:00,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:18:00,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 21:18:00,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-11-11 21:18:00,957 INFO L87 Difference]: Start difference. First operand 119 states and 299 transitions. Second operand has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:01,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:18:01,460 INFO L93 Difference]: Finished difference Result 163 states and 391 transitions. [2020-11-11 21:18:01,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-11 21:18:01,460 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 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 12 [2020-11-11 21:18:01,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:18:01,462 INFO L225 Difference]: With dead ends: 163 [2020-11-11 21:18:01,462 INFO L226 Difference]: Without dead ends: 158 [2020-11-11 21:18:01,462 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=204, Invalid=552, Unknown=0, NotChecked=0, Total=756 [2020-11-11 21:18:01,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-11-11 21:18:01,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 119. [2020-11-11 21:18:01,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.5338983050847457) internal successors, (299), 118 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:01,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 299 transitions. [2020-11-11 21:18:01,487 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 299 transitions. Word has length 12 [2020-11-11 21:18:01,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:18:01,487 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 299 transitions. [2020-11-11 21:18:01,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:01,487 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 299 transitions. [2020-11-11 21:18:01,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-11 21:18:01,488 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:18:01,488 INFO L494 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:18:01,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:18:01,696 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:18:01,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:18:01,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1994342579, now seen corresponding path program 10 times [2020-11-11 21:18:01,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:18:01,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043410584] [2020-11-11 21:18:01,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:18:01,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:18:01,783 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:18:01,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043410584] [2020-11-11 21:18:01,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524986911] [2020-11-11 21:18:01,784 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 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 [2020-11-11 21:18:01,842 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 21:18:01,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:18:01,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-11 21:18:01,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:18:02,004 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:18:02,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:18:02,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-11-11 21:18:02,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184645017] [2020-11-11 21:18:02,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 21:18:02,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:18:02,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 21:18:02,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-11-11 21:18:02,006 INFO L87 Difference]: Start difference. First operand 119 states and 299 transitions. Second operand has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:02,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:18:02,211 INFO L93 Difference]: Finished difference Result 150 states and 358 transitions. [2020-11-11 21:18:02,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-11 21:18:02,211 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 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 12 [2020-11-11 21:18:02,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:18:02,213 INFO L225 Difference]: With dead ends: 150 [2020-11-11 21:18:02,213 INFO L226 Difference]: Without dead ends: 148 [2020-11-11 21:18:02,213 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-11-11 21:18:02,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-11-11 21:18:02,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 120. [2020-11-11 21:18:02,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.53781512605042) internal successors, (302), 119 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:02,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 302 transitions. [2020-11-11 21:18:02,220 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 302 transitions. Word has length 12 [2020-11-11 21:18:02,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:18:02,221 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 302 transitions. [2020-11-11 21:18:02,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:02,221 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 302 transitions. [2020-11-11 21:18:02,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-11 21:18:02,222 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:18:02,222 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:18:02,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:18:02,423 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:18:02,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:18:02,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1979298930, now seen corresponding path program 11 times [2020-11-11 21:18:02,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:18:02,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068114311] [2020-11-11 21:18:02,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:18:02,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:18:02,502 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:18:02,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068114311] [2020-11-11 21:18:02,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481880316] [2020-11-11 21:18:02,503 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 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 [2020-11-11 21:18:02,558 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:18:02,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:18:02,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-11 21:18:02,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:18:02,664 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:18:02,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:18:02,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:18:02,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-11-11 21:18:02,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559499992] [2020-11-11 21:18:02,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 21:18:02,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:18:02,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 21:18:02,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-11-11 21:18:02,681 INFO L87 Difference]: Start difference. First operand 120 states and 302 transitions. Second operand has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:03,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:18:03,170 INFO L93 Difference]: Finished difference Result 180 states and 429 transitions. [2020-11-11 21:18:03,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-11 21:18:03,173 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 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 12 [2020-11-11 21:18:03,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:18:03,174 INFO L225 Difference]: With dead ends: 180 [2020-11-11 21:18:03,175 INFO L226 Difference]: Without dead ends: 172 [2020-11-11 21:18:03,175 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2020-11-11 21:18:03,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-11-11 21:18:03,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 121. [2020-11-11 21:18:03,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.525) internal successors, (303), 120 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:03,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 303 transitions. [2020-11-11 21:18:03,181 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 303 transitions. Word has length 12 [2020-11-11 21:18:03,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:18:03,181 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 303 transitions. [2020-11-11 21:18:03,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:03,181 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 303 transitions. [2020-11-11 21:18:03,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-11 21:18:03,182 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:18:03,182 INFO L494 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:18:03,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-11-11 21:18:03,395 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:18:03,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:18:03,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1979297969, now seen corresponding path program 12 times [2020-11-11 21:18:03,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:18:03,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559203110] [2020-11-11 21:18:03,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:18:03,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:18:03,493 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:18:03,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559203110] [2020-11-11 21:18:03,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327626608] [2020-11-11 21:18:03,494 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 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 [2020-11-11 21:18:03,557 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-11-11 21:18:03,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:18:03,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-11 21:18:03,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:18:03,691 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:18:05,854 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:18:05,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:18:05,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-11-11 21:18:05,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266090449] [2020-11-11 21:18:05,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-11 21:18:05,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:18:05,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-11 21:18:05,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=138, Unknown=1, NotChecked=0, Total=182 [2020-11-11 21:18:05,857 INFO L87 Difference]: Start difference. First operand 121 states and 303 transitions. Second operand has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:08,109 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 27 [2020-11-11 21:18:12,313 WARN L193 SmtUtils]: Spent 4.17 s on a formula simplification. DAG size of input: 43 DAG size of output: 32 [2020-11-11 21:18:13,425 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification that was a NOOP. DAG size: 25 [2020-11-11 21:18:31,743 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2020-11-11 21:18:39,052 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 29 [2020-11-11 21:19:29,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:19:29,586 INFO L93 Difference]: Finished difference Result 189 states and 446 transitions. [2020-11-11 21:19:29,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-11 21:19:29,587 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 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 12 [2020-11-11 21:19:29,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:19:29,592 INFO L225 Difference]: With dead ends: 189 [2020-11-11 21:19:29,592 INFO L226 Difference]: Without dead ends: 184 [2020-11-11 21:19:29,592 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 34.6s TimeCoverageRelationStatistics Valid=277, Invalid=705, Unknown=10, NotChecked=0, Total=992 [2020-11-11 21:19:29,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-11-11 21:19:29,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 121. [2020-11-11 21:19:29,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.525) internal successors, (303), 120 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:29,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 303 transitions. [2020-11-11 21:19:29,601 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 303 transitions. Word has length 12 [2020-11-11 21:19:29,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:19:29,601 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 303 transitions. [2020-11-11 21:19:29,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:29,602 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 303 transitions. [2020-11-11 21:19:29,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-11 21:19:29,602 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:19:29,602 INFO L494 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:19:29,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:19:29,803 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:19:29,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:19:29,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1571312207, now seen corresponding path program 13 times [2020-11-11 21:19:29,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:19:29,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423746451] [2020-11-11 21:19:29,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:19:29,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:19:29,914 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:29,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423746451] [2020-11-11 21:19:29,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461209275] [2020-11-11 21:19:29,915 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 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 [2020-11-11 21:19:29,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:19:29,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-11 21:19:29,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:19:30,120 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:30,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:19:30,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-11-11 21:19:30,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708289679] [2020-11-11 21:19:30,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 21:19:30,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:19:30,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 21:19:30,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-11-11 21:19:30,122 INFO L87 Difference]: Start difference. First operand 121 states and 303 transitions. Second operand has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:30,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:19:30,354 INFO L93 Difference]: Finished difference Result 156 states and 371 transitions. [2020-11-11 21:19:30,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-11 21:19:30,355 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 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 12 [2020-11-11 21:19:30,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:19:30,357 INFO L225 Difference]: With dead ends: 156 [2020-11-11 21:19:30,357 INFO L226 Difference]: Without dead ends: 154 [2020-11-11 21:19:30,358 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2020-11-11 21:19:30,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-11-11 21:19:30,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 124. [2020-11-11 21:19:30,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.5203252032520327) internal successors, (310), 123 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:30,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 310 transitions. [2020-11-11 21:19:30,363 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 310 transitions. Word has length 12 [2020-11-11 21:19:30,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:19:30,364 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 310 transitions. [2020-11-11 21:19:30,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:30,364 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 310 transitions. [2020-11-11 21:19:30,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-11 21:19:30,364 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:19:30,365 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:19:30,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-11-11 21:19:30,578 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:19:30,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:19:30,579 INFO L82 PathProgramCache]: Analyzing trace with hash 2037689506, now seen corresponding path program 14 times [2020-11-11 21:19:30,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:19:30,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187941423] [2020-11-11 21:19:30,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:19:30,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:19:30,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:30,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187941423] [2020-11-11 21:19:30,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205682] [2020-11-11 21:19:30,678 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 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 [2020-11-11 21:19:30,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:19:30,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:19:30,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-11 21:19:30,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:19:30,861 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:19:30,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:30,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:19:30,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-11-11 21:19:30,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267446202] [2020-11-11 21:19:30,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 21:19:30,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:19:30,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 21:19:30,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-11-11 21:19:30,908 INFO L87 Difference]: Start difference. First operand 124 states and 310 transitions. Second operand has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:31,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:19:31,590 INFO L93 Difference]: Finished difference Result 206 states and 484 transitions. [2020-11-11 21:19:31,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-11 21:19:31,590 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 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 12 [2020-11-11 21:19:31,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:19:31,592 INFO L225 Difference]: With dead ends: 206 [2020-11-11 21:19:31,592 INFO L226 Difference]: Without dead ends: 198 [2020-11-11 21:19:31,593 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=233, Invalid=637, Unknown=0, NotChecked=0, Total=870 [2020-11-11 21:19:31,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-11-11 21:19:31,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 126. [2020-11-11 21:19:31,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.512) internal successors, (314), 125 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:31,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 314 transitions. [2020-11-11 21:19:31,598 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 314 transitions. Word has length 12 [2020-11-11 21:19:31,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:19:31,599 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 314 transitions. [2020-11-11 21:19:31,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:31,599 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 314 transitions. [2020-11-11 21:19:31,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-11 21:19:31,600 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:19:31,600 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:19:31,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-11-11 21:19:31,814 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:19:31,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:19:31,815 INFO L82 PathProgramCache]: Analyzing trace with hash 2037718336, now seen corresponding path program 15 times [2020-11-11 21:19:31,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:19:31,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171393537] [2020-11-11 21:19:31,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:19:31,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:19:31,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:31,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171393537] [2020-11-11 21:19:31,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87773431] [2020-11-11 21:19:31,910 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 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 [2020-11-11 21:19:32,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-11 21:19:32,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:19:32,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-11 21:19:32,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:19:32,118 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:19:32,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:32,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:19:32,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-11-11 21:19:32,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722486471] [2020-11-11 21:19:32,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 21:19:32,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:19:32,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 21:19:32,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-11-11 21:19:32,139 INFO L87 Difference]: Start difference. First operand 126 states and 314 transitions. Second operand has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:32,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:19:32,761 INFO L93 Difference]: Finished difference Result 212 states and 497 transitions. [2020-11-11 21:19:32,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-11 21:19:32,761 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 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 12 [2020-11-11 21:19:32,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:19:32,764 INFO L225 Difference]: With dead ends: 212 [2020-11-11 21:19:32,764 INFO L226 Difference]: Without dead ends: 204 [2020-11-11 21:19:32,765 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=242, Invalid=628, Unknown=0, NotChecked=0, Total=870 [2020-11-11 21:19:32,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-11-11 21:19:32,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 128. [2020-11-11 21:19:32,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.5511811023622046) internal successors, (324), 127 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:32,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 324 transitions. [2020-11-11 21:19:32,770 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 324 transitions. Word has length 12 [2020-11-11 21:19:32,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:19:32,771 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 324 transitions. [2020-11-11 21:19:32,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:32,771 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 324 transitions. [2020-11-11 21:19:32,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-11 21:19:32,772 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:19:32,772 INFO L494 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:19:32,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-11-11 21:19:32,985 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:19:32,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:19:32,985 INFO L82 PathProgramCache]: Analyzing trace with hash 2037719297, now seen corresponding path program 16 times [2020-11-11 21:19:32,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:19:32,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92556173] [2020-11-11 21:19:32,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:19:32,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:19:33,073 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:33,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92556173] [2020-11-11 21:19:33,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126506031] [2020-11-11 21:19:33,074 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 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 [2020-11-11 21:19:33,134 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 21:19:33,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:19:33,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-11 21:19:33,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:19:33,246 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:19:33,270 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:33,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:19:33,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-11-11 21:19:33,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994621920] [2020-11-11 21:19:33,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 21:19:33,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:19:33,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 21:19:33,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-11-11 21:19:33,273 INFO L87 Difference]: Start difference. First operand 128 states and 324 transitions. Second operand has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:33,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:19:33,984 INFO L93 Difference]: Finished difference Result 212 states and 495 transitions. [2020-11-11 21:19:33,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 21:19:33,986 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 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 12 [2020-11-11 21:19:33,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:19:33,987 INFO L225 Difference]: With dead ends: 212 [2020-11-11 21:19:33,988 INFO L226 Difference]: Without dead ends: 204 [2020-11-11 21:19:33,988 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=288, Invalid=768, Unknown=0, NotChecked=0, Total=1056 [2020-11-11 21:19:33,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-11-11 21:19:33,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 127. [2020-11-11 21:19:33,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.507936507936508) internal successors, (316), 126 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:33,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 316 transitions. [2020-11-11 21:19:33,994 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 316 transitions. Word has length 12 [2020-11-11 21:19:33,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:19:33,994 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 316 transitions. [2020-11-11 21:19:33,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:33,995 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 316 transitions. [2020-11-11 21:19:33,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-11 21:19:33,995 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:19:33,995 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:19:34,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-11-11 21:19:34,207 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:19:34,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:19:34,207 INFO L82 PathProgramCache]: Analyzing trace with hash 437459916, now seen corresponding path program 17 times [2020-11-11 21:19:34,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:19:34,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385417420] [2020-11-11 21:19:34,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:19:34,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:19:34,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:34,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385417420] [2020-11-11 21:19:34,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152576237] [2020-11-11 21:19:34,293 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 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 [2020-11-11 21:19:34,361 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:19:34,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:19:34,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-11 21:19:34,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:19:34,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:34,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:19:34,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-11-11 21:19:34,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305248275] [2020-11-11 21:19:34,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 21:19:34,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:19:34,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 21:19:34,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-11-11 21:19:34,491 INFO L87 Difference]: Start difference. First operand 127 states and 316 transitions. Second operand has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:34,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:19:34,682 INFO L93 Difference]: Finished difference Result 162 states and 386 transitions. [2020-11-11 21:19:34,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-11 21:19:34,683 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 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 12 [2020-11-11 21:19:34,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:19:34,684 INFO L225 Difference]: With dead ends: 162 [2020-11-11 21:19:34,684 INFO L226 Difference]: Without dead ends: 160 [2020-11-11 21:19:34,684 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:19:34,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-11-11 21:19:34,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 129. [2020-11-11 21:19:34,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.515625) internal successors, (322), 128 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:34,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 322 transitions. [2020-11-11 21:19:34,689 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 322 transitions. Word has length 12 [2020-11-11 21:19:34,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:19:34,690 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 322 transitions. [2020-11-11 21:19:34,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:34,690 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 322 transitions. [2020-11-11 21:19:34,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-11 21:19:34,690 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:19:34,690 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:19:34,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-11-11 21:19:34,891 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:19:34,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:19:34,892 INFO L82 PathProgramCache]: Analyzing trace with hash 2011173168, now seen corresponding path program 18 times [2020-11-11 21:19:34,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:19:34,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758127362] [2020-11-11 21:19:34,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:19:34,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:19:34,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:34,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758127362] [2020-11-11 21:19:34,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745482302] [2020-11-11 21:19:34,984 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 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 [2020-11-11 21:19:35,041 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-11-11 21:19:35,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:19:35,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-11 21:19:35,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:19:35,152 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:19:35,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:35,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:19:35,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-11-11 21:19:35,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527429715] [2020-11-11 21:19:35,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 21:19:35,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:19:35,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 21:19:35,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-11-11 21:19:35,168 INFO L87 Difference]: Start difference. First operand 129 states and 322 transitions. Second operand has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:35,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:19:35,820 INFO L93 Difference]: Finished difference Result 178 states and 422 transitions. [2020-11-11 21:19:35,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-11 21:19:35,822 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 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 12 [2020-11-11 21:19:35,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:19:35,824 INFO L225 Difference]: With dead ends: 178 [2020-11-11 21:19:35,824 INFO L226 Difference]: Without dead ends: 173 [2020-11-11 21:19:35,825 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=242, Invalid=628, Unknown=0, NotChecked=0, Total=870 [2020-11-11 21:19:35,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-11-11 21:19:35,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 125. [2020-11-11 21:19:35,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.467741935483871) internal successors, (306), 124 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:35,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 306 transitions. [2020-11-11 21:19:35,829 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 306 transitions. Word has length 12 [2020-11-11 21:19:35,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:19:35,830 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 306 transitions. [2020-11-11 21:19:35,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:35,830 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 306 transitions. [2020-11-11 21:19:35,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-11 21:19:35,830 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:19:35,831 INFO L494 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:19:36,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:19:36,045 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:19:36,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:19:36,045 INFO L82 PathProgramCache]: Analyzing trace with hash -2077773447, now seen corresponding path program 5 times [2020-11-11 21:19:36,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:19:36,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007280864] [2020-11-11 21:19:36,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:19:36,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:19:36,148 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:36,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007280864] [2020-11-11 21:19:36,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325000911] [2020-11-11 21:19:36,149 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:19:36,205 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-11 21:19:36,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:19:36,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:19:36,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:19:36,347 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:19:36,366 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:36,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:19:36,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:19:36,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881790108] [2020-11-11 21:19:36,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:19:36,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:19:36,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:19:36,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:19:36,368 INFO L87 Difference]: Start difference. First operand 125 states and 306 transitions. Second operand has 15 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:36,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:19:36,761 INFO L93 Difference]: Finished difference Result 173 states and 412 transitions. [2020-11-11 21:19:36,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-11 21:19:36,762 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 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 12 [2020-11-11 21:19:36,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:19:36,763 INFO L225 Difference]: With dead ends: 173 [2020-11-11 21:19:36,763 INFO L226 Difference]: Without dead ends: 168 [2020-11-11 21:19:36,764 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=198, Invalid=452, Unknown=0, NotChecked=0, Total=650 [2020-11-11 21:19:36,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-11-11 21:19:36,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 132. [2020-11-11 21:19:36,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.5343511450381677) internal successors, (332), 131 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:36,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 332 transitions. [2020-11-11 21:19:36,769 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 332 transitions. Word has length 12 [2020-11-11 21:19:36,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:19:36,769 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 332 transitions. [2020-11-11 21:19:36,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:36,769 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 332 transitions. [2020-11-11 21:19:36,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:19:36,770 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:19:36,770 INFO L494 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:19:36,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-11-11 21:19:36,981 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:19:36,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:19:36,981 INFO L82 PathProgramCache]: Analyzing trace with hash -941455571, now seen corresponding path program 6 times [2020-11-11 21:19:36,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:19:36,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128226394] [2020-11-11 21:19:36,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:19:36,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:19:37,108 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:37,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128226394] [2020-11-11 21:19:37,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398655455] [2020-11-11 21:19:37,109 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 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 [2020-11-11 21:19:37,171 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-11 21:19:37,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:19:37,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:19:37,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:19:37,358 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:19:37,379 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:37,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:19:37,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:19:37,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091818034] [2020-11-11 21:19:37,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:19:37,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:19:37,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:19:37,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:19:37,381 INFO L87 Difference]: Start difference. First operand 132 states and 332 transitions. Second operand has 17 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:37,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:19:37,904 INFO L93 Difference]: Finished difference Result 181 states and 431 transitions. [2020-11-11 21:19:37,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-11 21:19:37,904 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 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 13 [2020-11-11 21:19:37,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:19:37,906 INFO L225 Difference]: With dead ends: 181 [2020-11-11 21:19:37,906 INFO L226 Difference]: Without dead ends: 175 [2020-11-11 21:19:37,906 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=259, Invalid=611, Unknown=0, NotChecked=0, Total=870 [2020-11-11 21:19:37,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-11-11 21:19:37,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 138. [2020-11-11 21:19:37,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.5474452554744524) internal successors, (349), 137 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:37,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 349 transitions. [2020-11-11 21:19:37,915 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 349 transitions. Word has length 13 [2020-11-11 21:19:37,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:19:37,915 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 349 transitions. [2020-11-11 21:19:37,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:37,915 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 349 transitions. [2020-11-11 21:19:37,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:19:37,916 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:19:37,916 INFO L494 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:19:38,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:19:38,129 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:19:38,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:19:38,129 INFO L82 PathProgramCache]: Analyzing trace with hash -941754442, now seen corresponding path program 19 times [2020-11-11 21:19:38,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:19:38,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252442701] [2020-11-11 21:19:38,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:19:38,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:19:38,239 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:38,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252442701] [2020-11-11 21:19:38,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641054624] [2020-11-11 21:19:38,239 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:19:38,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:19:38,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:19:38,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:19:38,469 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:19:38,492 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:38,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:19:38,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:19:38,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000775614] [2020-11-11 21:19:38,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:19:38,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:19:38,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:19:38,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:19:38,495 INFO L87 Difference]: Start difference. First operand 138 states and 349 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:39,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:19:39,266 INFO L93 Difference]: Finished difference Result 191 states and 459 transitions. [2020-11-11 21:19:39,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-11 21:19:39,267 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 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 13 [2020-11-11 21:19:39,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:19:39,269 INFO L225 Difference]: With dead ends: 191 [2020-11-11 21:19:39,269 INFO L226 Difference]: Without dead ends: 186 [2020-11-11 21:19:39,269 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=305, Invalid=751, Unknown=0, NotChecked=0, Total=1056 [2020-11-11 21:19:39,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-11-11 21:19:39,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 138. [2020-11-11 21:19:39,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.5474452554744524) internal successors, (349), 137 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:39,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 349 transitions. [2020-11-11 21:19:39,275 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 349 transitions. Word has length 13 [2020-11-11 21:19:39,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:19:39,275 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 349 transitions. [2020-11-11 21:19:39,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:39,275 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 349 transitions. [2020-11-11 21:19:39,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:19:39,276 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:19:39,276 INFO L494 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:19:39,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-11-11 21:19:39,488 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:19:39,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:19:39,489 INFO L82 PathProgramCache]: Analyzing trace with hash -965765182, now seen corresponding path program 20 times [2020-11-11 21:19:39,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:19:39,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143392099] [2020-11-11 21:19:39,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:19:39,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:19:39,600 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:39,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143392099] [2020-11-11 21:19:39,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067476371] [2020-11-11 21:19:39,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:19:39,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:19:39,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:19:39,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:19:39,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:19:39,859 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:39,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:19:39,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:19:39,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505234757] [2020-11-11 21:19:39,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:19:39,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:19:39,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:19:39,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:19:39,860 INFO L87 Difference]: Start difference. First operand 138 states and 349 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:40,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:19:40,173 INFO L93 Difference]: Finished difference Result 175 states and 419 transitions. [2020-11-11 21:19:40,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-11 21:19:40,173 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 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 13 [2020-11-11 21:19:40,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:19:40,175 INFO L225 Difference]: With dead ends: 175 [2020-11-11 21:19:40,175 INFO L226 Difference]: Without dead ends: 173 [2020-11-11 21:19:40,175 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=132, Invalid=374, Unknown=0, NotChecked=0, Total=506 [2020-11-11 21:19:40,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-11-11 21:19:40,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 138. [2020-11-11 21:19:40,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.5474452554744524) internal successors, (349), 137 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:40,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 349 transitions. [2020-11-11 21:19:40,180 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 349 transitions. Word has length 13 [2020-11-11 21:19:40,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:19:40,180 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 349 transitions. [2020-11-11 21:19:40,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:40,181 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 349 transitions. [2020-11-11 21:19:40,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:19:40,181 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:19:40,181 INFO L494 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:19:40,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:19:40,382 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:19:40,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:19:40,383 INFO L82 PathProgramCache]: Analyzing trace with hash -950721533, now seen corresponding path program 21 times [2020-11-11 21:19:40,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:19:40,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247101970] [2020-11-11 21:19:40,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:19:40,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:19:40,491 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:40,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247101970] [2020-11-11 21:19:40,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755442371] [2020-11-11 21:19:40,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:19:40,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-11 21:19:40,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:19:40,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:19:40,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:19:40,715 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:19:40,736 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:40,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:19:40,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:19:40,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993302645] [2020-11-11 21:19:40,738 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:19:40,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:19:40,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:19:40,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:19:40,739 INFO L87 Difference]: Start difference. First operand 138 states and 349 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:41,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:19:41,710 INFO L93 Difference]: Finished difference Result 204 states and 492 transitions. [2020-11-11 21:19:41,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 21:19:41,710 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 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 13 [2020-11-11 21:19:41,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:19:41,712 INFO L225 Difference]: With dead ends: 204 [2020-11-11 21:19:41,712 INFO L226 Difference]: Without dead ends: 199 [2020-11-11 21:19:41,713 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=389, Invalid=943, Unknown=0, NotChecked=0, Total=1332 [2020-11-11 21:19:41,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-11-11 21:19:41,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 138. [2020-11-11 21:19:41,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.5474452554744524) internal successors, (349), 137 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:41,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 349 transitions. [2020-11-11 21:19:41,721 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 349 transitions. Word has length 13 [2020-11-11 21:19:41,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:19:41,722 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 349 transitions. [2020-11-11 21:19:41,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:41,722 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 349 transitions. [2020-11-11 21:19:41,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:19:41,722 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:19:41,723 INFO L494 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:19:41,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-11-11 21:19:41,936 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:19:41,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:19:41,936 INFO L82 PathProgramCache]: Analyzing trace with hash -950720572, now seen corresponding path program 22 times [2020-11-11 21:19:41,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:19:41,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249297399] [2020-11-11 21:19:41,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:19:41,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:19:42,039 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:42,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249297399] [2020-11-11 21:19:42,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315112248] [2020-11-11 21:19:42,039 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:19:42,116 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 21:19:42,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:19:42,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:19:42,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:19:42,302 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:19:45,373 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 20 [2020-11-11 21:19:45,375 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:45,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:19:45,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-11-11 21:19:45,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635449953] [2020-11-11 21:19:45,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-11 21:19:45,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:19:45,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-11 21:19:45,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=185, Unknown=1, NotChecked=0, Total=240 [2020-11-11 21:19:45,377 INFO L87 Difference]: Start difference. First operand 138 states and 349 transitions. Second operand has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:47,647 WARN L193 SmtUtils]: Spent 2.00 s on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2020-11-11 21:19:49,797 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 29 [2020-11-11 21:20:03,304 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 25 [2020-11-11 21:20:34,882 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 27 DAG size of output: 26 [2020-11-11 21:20:56,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:20:56,553 INFO L93 Difference]: Finished difference Result 223 states and 532 transitions. [2020-11-11 21:20:56,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-11 21:20:56,556 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 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 13 [2020-11-11 21:20:56,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:20:56,558 INFO L225 Difference]: With dead ends: 223 [2020-11-11 21:20:56,558 INFO L226 Difference]: Without dead ends: 218 [2020-11-11 21:20:56,559 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 32.0s TimeCoverageRelationStatistics Valid=401, Invalid=1072, Unknown=9, NotChecked=0, Total=1482 [2020-11-11 21:20:56,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-11-11 21:20:56,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 138. [2020-11-11 21:20:56,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.5474452554744524) internal successors, (349), 137 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:20:56,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 349 transitions. [2020-11-11 21:20:56,563 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 349 transitions. Word has length 13 [2020-11-11 21:20:56,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:20:56,564 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 349 transitions. [2020-11-11 21:20:56,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:20:56,564 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 349 transitions. [2020-11-11 21:20:56,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:20:56,565 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:20:56,565 INFO L494 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:20:56,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:20:56,765 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:20:56,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:20:56,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1695078653, now seen corresponding path program 23 times [2020-11-11 21:20:56,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:20:56,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042703432] [2020-11-11 21:20:56,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:20:56,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:20:56,877 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:20:56,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042703432] [2020-11-11 21:20:56,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094498855] [2020-11-11 21:20:56,878 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:20:56,938 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-11 21:20:56,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:20:56,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:20:56,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:20:57,139 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:20:57,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:20:57,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:20:57,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657992323] [2020-11-11 21:20:57,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:20:57,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:20:57,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:20:57,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:20:57,141 INFO L87 Difference]: Start difference. First operand 138 states and 349 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:20:57,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:20:57,440 INFO L93 Difference]: Finished difference Result 181 states and 432 transitions. [2020-11-11 21:20:57,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-11 21:20:57,441 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 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 13 [2020-11-11 21:20:57,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:20:57,442 INFO L225 Difference]: With dead ends: 181 [2020-11-11 21:20:57,442 INFO L226 Difference]: Without dead ends: 179 [2020-11-11 21:20:57,443 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2020-11-11 21:20:57,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-11-11 21:20:57,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 140. [2020-11-11 21:20:57,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.553956834532374) internal successors, (355), 139 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:20:57,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 355 transitions. [2020-11-11 21:20:57,448 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 355 transitions. Word has length 13 [2020-11-11 21:20:57,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:20:57,448 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 355 transitions. [2020-11-11 21:20:57,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:20:57,449 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 355 transitions. [2020-11-11 21:20:57,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:20:57,449 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:20:57,449 INFO L494 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:20:57,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-11-11 21:20:57,661 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:20:57,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:20:57,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1695077692, now seen corresponding path program 24 times [2020-11-11 21:20:57,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:20:57,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967080127] [2020-11-11 21:20:57,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:20:57,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:20:57,759 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:20:57,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967080127] [2020-11-11 21:20:57,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185888291] [2020-11-11 21:20:57,760 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:20:57,831 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-11 21:20:57,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:20:57,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:20:57,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:20:58,041 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:20:58,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:20:58,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:20:58,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510157031] [2020-11-11 21:20:58,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:20:58,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:20:58,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:20:58,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:20:58,043 INFO L87 Difference]: Start difference. First operand 140 states and 355 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:20:58,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:20:58,389 INFO L93 Difference]: Finished difference Result 181 states and 433 transitions. [2020-11-11 21:20:58,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-11 21:20:58,390 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 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 13 [2020-11-11 21:20:58,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:20:58,392 INFO L225 Difference]: With dead ends: 181 [2020-11-11 21:20:58,392 INFO L226 Difference]: Without dead ends: 179 [2020-11-11 21:20:58,394 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2020-11-11 21:20:58,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-11-11 21:20:58,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 140. [2020-11-11 21:20:58,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.553956834532374) internal successors, (355), 139 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:20:58,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 355 transitions. [2020-11-11 21:20:58,399 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 355 transitions. Word has length 13 [2020-11-11 21:20:58,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:20:58,399 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 355 transitions. [2020-11-11 21:20:58,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:20:58,399 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 355 transitions. [2020-11-11 21:20:58,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:20:58,400 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:20:58,400 INFO L494 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:20:58,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:20:58,612 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:20:58,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:20:58,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1228701354, now seen corresponding path program 25 times [2020-11-11 21:20:58,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:20:58,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015666171] [2020-11-11 21:20:58,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:20:58,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:20:58,712 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:20:58,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015666171] [2020-11-11 21:20:58,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429647905] [2020-11-11 21:20:58,713 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:20:58,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:20:58,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:20:58,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:20:58,946 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:20:58,965 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:20:58,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:20:58,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:20:58,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078911763] [2020-11-11 21:20:58,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:20:58,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:20:58,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:20:58,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:20:58,967 INFO L87 Difference]: Start difference. First operand 140 states and 355 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:20:59,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:20:59,739 INFO L93 Difference]: Finished difference Result 216 states and 517 transitions. [2020-11-11 21:20:59,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-11 21:20:59,739 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 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 13 [2020-11-11 21:20:59,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:20:59,741 INFO L225 Difference]: With dead ends: 216 [2020-11-11 21:20:59,741 INFO L226 Difference]: Without dead ends: 208 [2020-11-11 21:20:59,742 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=316, Invalid=740, Unknown=0, NotChecked=0, Total=1056 [2020-11-11 21:20:59,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-11-11 21:20:59,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 141. [2020-11-11 21:20:59,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.5428571428571427) internal successors, (356), 140 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:20:59,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 356 transitions. [2020-11-11 21:20:59,746 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 356 transitions. Word has length 13 [2020-11-11 21:20:59,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:20:59,747 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 356 transitions. [2020-11-11 21:20:59,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:20:59,747 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 356 transitions. [2020-11-11 21:20:59,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:20:59,747 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:20:59,747 INFO L494 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:20:59,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-11-11 21:20:59,959 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:20:59,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:20:59,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1228700393, now seen corresponding path program 26 times [2020-11-11 21:20:59,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:20:59,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153771456] [2020-11-11 21:20:59,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:20:59,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:00,077 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:00,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153771456] [2020-11-11 21:21:00,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832802449] [2020-11-11 21:21:00,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:21:00,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:21:00,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:21:00,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:21:00,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:00,334 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:21:00,467 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:00,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:00,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:21:00,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875990348] [2020-11-11 21:21:00,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:21:00,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:00,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:21:00,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:21:00,469 INFO L87 Difference]: Start difference. First operand 141 states and 356 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:01,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:01,480 INFO L93 Difference]: Finished difference Result 236 states and 571 transitions. [2020-11-11 21:21:01,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 21:21:01,481 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 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 13 [2020-11-11 21:21:01,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:01,483 INFO L225 Difference]: With dead ends: 236 [2020-11-11 21:21:01,483 INFO L226 Difference]: Without dead ends: 228 [2020-11-11 21:21:01,483 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=300, Invalid=822, Unknown=0, NotChecked=0, Total=1122 [2020-11-11 21:21:01,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-11-11 21:21:01,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 143. [2020-11-11 21:21:01,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.5774647887323945) internal successors, (366), 142 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:01,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 366 transitions. [2020-11-11 21:21:01,488 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 366 transitions. Word has length 13 [2020-11-11 21:21:01,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:01,488 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 366 transitions. [2020-11-11 21:21:01,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:01,489 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 366 transitions. [2020-11-11 21:21:01,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:21:01,489 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:01,489 INFO L494 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:01,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-11-11 21:21:01,701 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:01,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:01,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1228671563, now seen corresponding path program 27 times [2020-11-11 21:21:01,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:01,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120106414] [2020-11-11 21:21:01,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:01,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:01,806 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:01,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120106414] [2020-11-11 21:21:01,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609661432] [2020-11-11 21:21:01,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:21:01,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-11 21:21:01,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:21:01,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:21:01,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:02,110 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:21:02,154 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:02,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:02,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:21:02,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057256094] [2020-11-11 21:21:02,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:21:02,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:02,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:21:02,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:21:02,156 INFO L87 Difference]: Start difference. First operand 143 states and 366 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:03,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:03,044 INFO L93 Difference]: Finished difference Result 218 states and 528 transitions. [2020-11-11 21:21:03,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 21:21:03,045 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 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 13 [2020-11-11 21:21:03,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:03,047 INFO L225 Difference]: With dead ends: 218 [2020-11-11 21:21:03,047 INFO L226 Difference]: Without dead ends: 213 [2020-11-11 21:21:03,048 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=308, Invalid=814, Unknown=0, NotChecked=0, Total=1122 [2020-11-11 21:21:03,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-11-11 21:21:03,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 144. [2020-11-11 21:21:03,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.5944055944055946) internal successors, (371), 143 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:03,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 371 transitions. [2020-11-11 21:21:03,052 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 371 transitions. Word has length 13 [2020-11-11 21:21:03,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:03,052 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 371 transitions. [2020-11-11 21:21:03,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:03,052 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 371 transitions. [2020-11-11 21:21:03,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:21:03,053 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:03,053 INFO L494 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:03,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-11-11 21:21:03,265 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:03,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:03,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1228670602, now seen corresponding path program 28 times [2020-11-11 21:21:03,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:03,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449528845] [2020-11-11 21:21:03,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:03,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:03,362 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:03,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449528845] [2020-11-11 21:21:03,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885804349] [2020-11-11 21:21:03,363 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 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 [2020-11-11 21:21:03,426 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 21:21:03,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:21:03,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:21:03,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:03,641 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:21:03,700 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:03,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:03,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:21:03,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174947161] [2020-11-11 21:21:03,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:21:03,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:03,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:21:03,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:21:03,702 INFO L87 Difference]: Start difference. First operand 144 states and 371 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:04,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:04,529 INFO L93 Difference]: Finished difference Result 216 states and 525 transitions. [2020-11-11 21:21:04,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 21:21:04,530 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 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 13 [2020-11-11 21:21:04,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:04,531 INFO L225 Difference]: With dead ends: 216 [2020-11-11 21:21:04,532 INFO L226 Difference]: Without dead ends: 211 [2020-11-11 21:21:04,533 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2020-11-11 21:21:04,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-11-11 21:21:04,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 143. [2020-11-11 21:21:04,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.5774647887323945) internal successors, (366), 142 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:04,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 366 transitions. [2020-11-11 21:21:04,538 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 366 transitions. Word has length 13 [2020-11-11 21:21:04,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:04,538 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 366 transitions. [2020-11-11 21:21:04,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:04,538 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 366 transitions. [2020-11-11 21:21:04,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:21:04,539 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:04,539 INFO L494 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:04,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-11-11 21:21:04,751 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:04,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:04,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1466008483, now seen corresponding path program 29 times [2020-11-11 21:21:04,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:04,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339189529] [2020-11-11 21:21:04,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:04,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:04,860 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:04,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339189529] [2020-11-11 21:21:04,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202094602] [2020-11-11 21:21:04,861 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 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 [2020-11-11 21:21:04,925 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-11 21:21:04,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:21:04,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:21:04,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:05,119 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:05,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:05,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:21:05,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690947953] [2020-11-11 21:21:05,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:21:05,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:05,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:21:05,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:21:05,120 INFO L87 Difference]: Start difference. First operand 143 states and 366 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:05,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:05,438 INFO L93 Difference]: Finished difference Result 191 states and 461 transitions. [2020-11-11 21:21:05,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-11 21:21:05,439 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 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 13 [2020-11-11 21:21:05,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:05,441 INFO L225 Difference]: With dead ends: 191 [2020-11-11 21:21:05,441 INFO L226 Difference]: Without dead ends: 189 [2020-11-11 21:21:05,441 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2020-11-11 21:21:05,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-11-11 21:21:05,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 149. [2020-11-11 21:21:05,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.5945945945945947) internal successors, (384), 148 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:05,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 384 transitions. [2020-11-11 21:21:05,445 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 384 transitions. Word has length 13 [2020-11-11 21:21:05,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:05,445 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 384 transitions. [2020-11-11 21:21:05,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:05,445 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 384 transitions. [2020-11-11 21:21:05,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:21:05,446 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:05,446 INFO L494 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:05,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:21:05,647 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:05,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:05,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1466037313, now seen corresponding path program 30 times [2020-11-11 21:21:05,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:05,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864188911] [2020-11-11 21:21:05,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:05,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:05,749 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:05,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864188911] [2020-11-11 21:21:05,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803268364] [2020-11-11 21:21:05,750 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 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 [2020-11-11 21:21:05,816 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-11 21:21:05,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:21:05,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:21:05,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:05,980 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:05,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:05,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:21:05,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972669232] [2020-11-11 21:21:05,981 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:21:05,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:05,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:21:05,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:21:05,982 INFO L87 Difference]: Start difference. First operand 149 states and 384 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:06,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:06,279 INFO L93 Difference]: Finished difference Result 195 states and 469 transitions. [2020-11-11 21:21:06,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-11 21:21:06,280 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 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 13 [2020-11-11 21:21:06,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:06,282 INFO L225 Difference]: With dead ends: 195 [2020-11-11 21:21:06,282 INFO L226 Difference]: Without dead ends: 193 [2020-11-11 21:21:06,283 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2020-11-11 21:21:06,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-11-11 21:21:06,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 149. [2020-11-11 21:21:06,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.5945945945945947) internal successors, (384), 148 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:06,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 384 transitions. [2020-11-11 21:21:06,287 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 384 transitions. Word has length 13 [2020-11-11 21:21:06,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:06,287 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 384 transitions. [2020-11-11 21:21:06,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:06,287 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 384 transitions. [2020-11-11 21:21:06,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:21:06,288 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:06,288 INFO L494 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:06,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-11-11 21:21:06,490 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:06,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:06,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1256111422, now seen corresponding path program 31 times [2020-11-11 21:21:06,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:06,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347693987] [2020-11-11 21:21:06,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:06,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:06,610 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:06,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347693987] [2020-11-11 21:21:06,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73625778] [2020-11-11 21:21:06,610 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 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 [2020-11-11 21:21:06,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:06,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:21:06,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:06,832 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:21:06,881 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:06,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:06,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:21:06,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172273956] [2020-11-11 21:21:06,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:21:06,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:06,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:21:06,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:21:06,884 INFO L87 Difference]: Start difference. First operand 149 states and 384 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:07,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:07,938 INFO L93 Difference]: Finished difference Result 258 states and 616 transitions. [2020-11-11 21:21:07,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-11 21:21:07,939 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 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 13 [2020-11-11 21:21:07,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:07,941 INFO L225 Difference]: With dead ends: 258 [2020-11-11 21:21:07,941 INFO L226 Difference]: Without dead ends: 250 [2020-11-11 21:21:07,942 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=374, Invalid=1032, Unknown=0, NotChecked=0, Total=1406 [2020-11-11 21:21:07,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-11-11 21:21:07,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 149. [2020-11-11 21:21:07,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.5945945945945947) internal successors, (384), 148 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:07,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 384 transitions. [2020-11-11 21:21:07,945 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 384 transitions. Word has length 13 [2020-11-11 21:21:07,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:07,946 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 384 transitions. [2020-11-11 21:21:07,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:07,946 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 384 transitions. [2020-11-11 21:21:07,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:21:07,947 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:07,947 INFO L494 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:08,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-11-11 21:21:08,148 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:08,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:08,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1256110461, now seen corresponding path program 32 times [2020-11-11 21:21:08,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:08,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024633919] [2020-11-11 21:21:08,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:08,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:08,251 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:08,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024633919] [2020-11-11 21:21:08,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077266684] [2020-11-11 21:21:08,252 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 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 [2020-11-11 21:21:08,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:21:08,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:21:08,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:21:08,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:08,475 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:21:08,533 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:08,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:08,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:21:08,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463645113] [2020-11-11 21:21:08,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:21:08,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:08,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:21:08,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:21:08,535 INFO L87 Difference]: Start difference. First operand 149 states and 384 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:09,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:09,669 INFO L93 Difference]: Finished difference Result 250 states and 601 transitions. [2020-11-11 21:21:09,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-11 21:21:09,670 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 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 13 [2020-11-11 21:21:09,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:09,671 INFO L225 Difference]: With dead ends: 250 [2020-11-11 21:21:09,671 INFO L226 Difference]: Without dead ends: 242 [2020-11-11 21:21:09,672 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=425, Invalid=1215, Unknown=0, NotChecked=0, Total=1640 [2020-11-11 21:21:09,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-11-11 21:21:09,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 145. [2020-11-11 21:21:09,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.6180555555555554) internal successors, (377), 144 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:09,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 377 transitions. [2020-11-11 21:21:09,677 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 377 transitions. Word has length 13 [2020-11-11 21:21:09,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:09,677 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 377 transitions. [2020-11-11 21:21:09,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:09,678 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 377 transitions. [2020-11-11 21:21:09,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:21:09,678 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:09,678 INFO L494 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:09,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:21:09,883 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:09,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:09,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1255217692, now seen corresponding path program 33 times [2020-11-11 21:21:09,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:09,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511621935] [2020-11-11 21:21:09,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:09,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:09,988 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:09,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511621935] [2020-11-11 21:21:09,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301437121] [2020-11-11 21:21:09,989 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 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 [2020-11-11 21:21:10,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-11 21:21:10,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:21:10,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:21:10,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:10,184 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:21:10,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:10,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:10,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:21:10,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766920387] [2020-11-11 21:21:10,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:21:10,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:10,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:21:10,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:21:10,202 INFO L87 Difference]: Start difference. First operand 145 states and 377 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:11,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:11,141 INFO L93 Difference]: Finished difference Result 262 states and 632 transitions. [2020-11-11 21:21:11,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-11 21:21:11,142 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 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 13 [2020-11-11 21:21:11,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:11,144 INFO L225 Difference]: With dead ends: 262 [2020-11-11 21:21:11,145 INFO L226 Difference]: Without dead ends: 254 [2020-11-11 21:21:11,146 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=423, Invalid=1217, Unknown=0, NotChecked=0, Total=1640 [2020-11-11 21:21:11,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-11-11 21:21:11,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 148. [2020-11-11 21:21:11,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.6666666666666665) internal successors, (392), 147 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:11,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 392 transitions. [2020-11-11 21:21:11,151 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 392 transitions. Word has length 13 [2020-11-11 21:21:11,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:11,151 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 392 transitions. [2020-11-11 21:21:11,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:11,152 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 392 transitions. [2020-11-11 21:21:11,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:21:11,152 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:11,152 INFO L494 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:11,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-11-11 21:21:11,362 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:11,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:11,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1255216731, now seen corresponding path program 34 times [2020-11-11 21:21:11,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:11,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464717353] [2020-11-11 21:21:11,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:11,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:11,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:11,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464717353] [2020-11-11 21:21:11,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946271684] [2020-11-11 21:21:11,463 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 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 [2020-11-11 21:21:11,533 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 21:21:11,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:21:11,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:21:11,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:11,678 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:21:11,704 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:11,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:11,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:21:11,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906745374] [2020-11-11 21:21:11,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:21:11,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:11,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:21:11,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:21:11,705 INFO L87 Difference]: Start difference. First operand 148 states and 392 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:12,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:12,575 INFO L93 Difference]: Finished difference Result 256 states and 629 transitions. [2020-11-11 21:21:12,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-11 21:21:12,576 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 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 13 [2020-11-11 21:21:12,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:12,578 INFO L225 Difference]: With dead ends: 256 [2020-11-11 21:21:12,578 INFO L226 Difference]: Without dead ends: 248 [2020-11-11 21:21:12,579 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=350, Invalid=982, Unknown=0, NotChecked=0, Total=1332 [2020-11-11 21:21:12,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-11-11 21:21:12,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 143. [2020-11-11 21:21:12,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.6549295774647885) internal successors, (377), 142 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:12,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 377 transitions. [2020-11-11 21:21:12,586 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 377 transitions. Word has length 13 [2020-11-11 21:21:12,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:12,587 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 377 transitions. [2020-11-11 21:21:12,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:12,587 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 377 transitions. [2020-11-11 21:21:12,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:21:12,587 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:12,587 INFO L494 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:12,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:21:12,801 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:12,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:12,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1255187901, now seen corresponding path program 35 times [2020-11-11 21:21:12,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:12,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116921322] [2020-11-11 21:21:12,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:12,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:12,901 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:12,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116921322] [2020-11-11 21:21:12,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409549142] [2020-11-11 21:21:12,902 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 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 [2020-11-11 21:21:12,978 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:21:12,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:21:12,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:21:12,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:13,135 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:21:13,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:13,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:13,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:21:13,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735865809] [2020-11-11 21:21:13,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:21:13,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:13,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:21:13,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:21:13,157 INFO L87 Difference]: Start difference. First operand 143 states and 377 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:14,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:14,201 INFO L93 Difference]: Finished difference Result 234 states and 568 transitions. [2020-11-11 21:21:14,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-11 21:21:14,202 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 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 13 [2020-11-11 21:21:14,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:14,204 INFO L225 Difference]: With dead ends: 234 [2020-11-11 21:21:14,204 INFO L226 Difference]: Without dead ends: 226 [2020-11-11 21:21:14,205 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=399, Invalid=1161, Unknown=0, NotChecked=0, Total=1560 [2020-11-11 21:21:14,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-11-11 21:21:14,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 143. [2020-11-11 21:21:14,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.6549295774647885) internal successors, (377), 142 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:14,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 377 transitions. [2020-11-11 21:21:14,209 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 377 transitions. Word has length 13 [2020-11-11 21:21:14,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:14,209 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 377 transitions. [2020-11-11 21:21:14,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:14,209 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 377 transitions. [2020-11-11 21:21:14,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:21:14,210 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:14,210 INFO L494 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:14,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-11-11 21:21:14,422 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:14,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:14,422 INFO L82 PathProgramCache]: Analyzing trace with hash 675431139, now seen corresponding path program 36 times [2020-11-11 21:21:14,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:14,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44778302] [2020-11-11 21:21:14,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:14,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:14,526 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:14,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44778302] [2020-11-11 21:21:14,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157773456] [2020-11-11 21:21:14,527 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 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 [2020-11-11 21:21:14,587 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-11 21:21:14,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:21:14,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:21:14,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:14,768 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:14,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:14,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:21:14,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810025653] [2020-11-11 21:21:14,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:21:14,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:14,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:21:14,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:21:14,769 INFO L87 Difference]: Start difference. First operand 143 states and 377 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:14,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:14,979 INFO L93 Difference]: Finished difference Result 182 states and 456 transitions. [2020-11-11 21:21:14,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-11 21:21:14,980 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 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 13 [2020-11-11 21:21:14,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:14,982 INFO L225 Difference]: With dead ends: 182 [2020-11-11 21:21:14,982 INFO L226 Difference]: Without dead ends: 180 [2020-11-11 21:21:14,982 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:21:14,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-11-11 21:21:14,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 149. [2020-11-11 21:21:14,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.6554054054054053) internal successors, (393), 148 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:14,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 393 transitions. [2020-11-11 21:21:14,986 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 393 transitions. Word has length 13 [2020-11-11 21:21:14,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:14,987 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 393 transitions. [2020-11-11 21:21:14,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:14,987 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 393 transitions. [2020-11-11 21:21:14,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:21:14,987 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:14,988 INFO L494 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:15,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:21:15,199 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:15,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:15,199 INFO L82 PathProgramCache]: Analyzing trace with hash 676385412, now seen corresponding path program 37 times [2020-11-11 21:21:15,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:15,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551069607] [2020-11-11 21:21:15,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:15,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:15,299 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:15,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551069607] [2020-11-11 21:21:15,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319874944] [2020-11-11 21:21:15,300 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 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 [2020-11-11 21:21:15,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:15,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:21:15,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:15,545 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:15,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:15,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:21:15,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786944537] [2020-11-11 21:21:15,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:21:15,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:15,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:21:15,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:21:15,547 INFO L87 Difference]: Start difference. First operand 149 states and 393 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:15,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:15,817 INFO L93 Difference]: Finished difference Result 187 states and 466 transitions. [2020-11-11 21:21:15,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-11 21:21:15,818 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 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 13 [2020-11-11 21:21:15,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:15,819 INFO L225 Difference]: With dead ends: 187 [2020-11-11 21:21:15,819 INFO L226 Difference]: Without dead ends: 185 [2020-11-11 21:21:15,820 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2020-11-11 21:21:15,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-11-11 21:21:15,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 150. [2020-11-11 21:21:15,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.6442953020134228) internal successors, (394), 149 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:15,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 394 transitions. [2020-11-11 21:21:15,825 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 394 transitions. Word has length 13 [2020-11-11 21:21:15,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:15,825 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 394 transitions. [2020-11-11 21:21:15,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:15,825 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 394 transitions. [2020-11-11 21:21:15,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:21:15,826 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:15,826 INFO L494 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:16,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-11-11 21:21:16,040 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:16,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:16,041 INFO L82 PathProgramCache]: Analyzing trace with hash -2106775881, now seen corresponding path program 38 times [2020-11-11 21:21:16,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:16,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194689128] [2020-11-11 21:21:16,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:16,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:16,144 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:16,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194689128] [2020-11-11 21:21:16,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388949585] [2020-11-11 21:21:16,144 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 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 [2020-11-11 21:21:16,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:21:16,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:21:16,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:21:16,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:16,365 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:21:16,413 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:16,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:16,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:21:16,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619135977] [2020-11-11 21:21:16,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:21:16,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:16,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:21:16,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:21:16,415 INFO L87 Difference]: Start difference. First operand 150 states and 394 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:17,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:17,244 INFO L93 Difference]: Finished difference Result 226 states and 544 transitions. [2020-11-11 21:21:17,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-11 21:21:17,244 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 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 13 [2020-11-11 21:21:17,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:17,245 INFO L225 Difference]: With dead ends: 226 [2020-11-11 21:21:17,246 INFO L226 Difference]: Without dead ends: 221 [2020-11-11 21:21:17,246 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=305, Invalid=751, Unknown=0, NotChecked=0, Total=1056 [2020-11-11 21:21:17,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-11-11 21:21:17,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 148. [2020-11-11 21:21:17,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.578231292517007) internal successors, (379), 147 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:17,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 379 transitions. [2020-11-11 21:21:17,250 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 379 transitions. Word has length 13 [2020-11-11 21:21:17,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:17,251 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 379 transitions. [2020-11-11 21:21:17,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:17,251 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 379 transitions. [2020-11-11 21:21:17,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:21:17,251 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:17,252 INFO L494 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:17,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-11-11 21:21:17,452 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:17,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:17,453 INFO L82 PathProgramCache]: Analyzing trace with hash -2078117900, now seen corresponding path program 39 times [2020-11-11 21:21:17,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:17,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245184165] [2020-11-11 21:21:17,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:17,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:17,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:17,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245184165] [2020-11-11 21:21:17,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723730606] [2020-11-11 21:21:17,564 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 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 [2020-11-11 21:21:17,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-11 21:21:17,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:21:17,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:21:17,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:17,758 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:21:17,775 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:17,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:17,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:21:17,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465269612] [2020-11-11 21:21:17,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:21:17,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:17,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:21:17,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:21:17,778 INFO L87 Difference]: Start difference. First operand 148 states and 379 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:18,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:18,641 INFO L93 Difference]: Finished difference Result 228 states and 540 transitions. [2020-11-11 21:21:18,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-11 21:21:18,641 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 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 13 [2020-11-11 21:21:18,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:18,643 INFO L225 Difference]: With dead ends: 228 [2020-11-11 21:21:18,643 INFO L226 Difference]: Without dead ends: 223 [2020-11-11 21:21:18,644 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=350, Invalid=982, Unknown=0, NotChecked=0, Total=1332 [2020-11-11 21:21:18,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-11-11 21:21:18,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 147. [2020-11-11 21:21:18,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.5616438356164384) internal successors, (374), 146 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:18,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 374 transitions. [2020-11-11 21:21:18,648 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 374 transitions. Word has length 13 [2020-11-11 21:21:18,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:18,648 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 374 transitions. [2020-11-11 21:21:18,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:18,648 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 374 transitions. [2020-11-11 21:21:18,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:21:18,649 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:18,649 INFO L494 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:18,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:21:18,854 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:18,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:18,854 INFO L82 PathProgramCache]: Analyzing trace with hash -2077193418, now seen corresponding path program 40 times [2020-11-11 21:21:18,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:18,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828257591] [2020-11-11 21:21:18,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:18,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:18,958 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:18,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828257591] [2020-11-11 21:21:18,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438494453] [2020-11-11 21:21:18,959 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 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 [2020-11-11 21:21:19,017 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 21:21:19,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:21:19,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:21:19,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:19,159 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:21:19,181 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:19,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:19,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:21:19,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728284559] [2020-11-11 21:21:19,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:21:19,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:19,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:21:19,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:21:19,183 INFO L87 Difference]: Start difference. First operand 147 states and 374 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:19,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:19,990 INFO L93 Difference]: Finished difference Result 213 states and 492 transitions. [2020-11-11 21:21:19,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-11 21:21:19,990 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 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 13 [2020-11-11 21:21:19,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:19,992 INFO L225 Difference]: With dead ends: 213 [2020-11-11 21:21:19,992 INFO L226 Difference]: Without dead ends: 208 [2020-11-11 21:21:19,992 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=322, Invalid=868, Unknown=0, NotChecked=0, Total=1190 [2020-11-11 21:21:19,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-11-11 21:21:19,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 143. [2020-11-11 21:21:19,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.471830985915493) internal successors, (351), 142 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:19,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 351 transitions. [2020-11-11 21:21:19,997 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 351 transitions. Word has length 13 [2020-11-11 21:21:19,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:19,997 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 351 transitions. [2020-11-11 21:21:19,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:19,997 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 351 transitions. [2020-11-11 21:21:19,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:21:19,998 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:19,998 INFO L494 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:20,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-11-11 21:21:20,206 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:20,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:20,207 INFO L82 PathProgramCache]: Analyzing trace with hash 13555915, now seen corresponding path program 6 times [2020-11-11 21:21:20,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:20,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652820991] [2020-11-11 21:21:20,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:20,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:20,322 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:20,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652820991] [2020-11-11 21:21:20,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308397926] [2020-11-11 21:21:20,323 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 [2020-11-11 21:21:20,389 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-11 21:21:20,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:21:20,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-11 21:21:20,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:20,518 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:20,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-11 21:21:20,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 16 [2020-11-11 21:21:20,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477422593] [2020-11-11 21:21:20,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-11 21:21:20,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:20,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-11 21:21:20,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2020-11-11 21:21:20,520 INFO L87 Difference]: Start difference. First operand 143 states and 351 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:20,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:20,553 INFO L93 Difference]: Finished difference Result 201 states and 530 transitions. [2020-11-11 21:21:20,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-11 21:21:20,554 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2020-11-11 21:21:20,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:20,555 INFO L225 Difference]: With dead ends: 201 [2020-11-11 21:21:20,556 INFO L226 Difference]: Without dead ends: 194 [2020-11-11 21:21:20,556 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2020-11-11 21:21:20,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-11-11 21:21:20,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2020-11-11 21:21:20,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.678756476683938) internal successors, (517), 193 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:20,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 517 transitions. [2020-11-11 21:21:20,561 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 517 transitions. Word has length 13 [2020-11-11 21:21:20,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:20,561 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 517 transitions. [2020-11-11 21:21:20,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:20,561 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 517 transitions. [2020-11-11 21:21:20,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:21:20,562 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:20,562 INFO L494 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:20,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:21:20,775 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:20,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:20,775 INFO L82 PathProgramCache]: Analyzing trace with hash 879672664, now seen corresponding path program 7 times [2020-11-11 21:21:20,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:20,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483292839] [2020-11-11 21:21:20,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:20,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:20,926 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:20,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483292839] [2020-11-11 21:21:20,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105868977] [2020-11-11 21:21:20,927 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 [2020-11-11 21:21:20,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:20,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-11 21:21:20,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:21,137 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:21,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-11 21:21:21,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 17 [2020-11-11 21:21:21,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238965022] [2020-11-11 21:21:21,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-11 21:21:21,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:21,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-11 21:21:21,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:21:21,139 INFO L87 Difference]: Start difference. First operand 194 states and 517 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:21,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:21,169 INFO L93 Difference]: Finished difference Result 264 states and 678 transitions. [2020-11-11 21:21:21,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-11 21:21:21,170 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2020-11-11 21:21:21,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:21,171 INFO L225 Difference]: With dead ends: 264 [2020-11-11 21:21:21,171 INFO L226 Difference]: Without dead ends: 240 [2020-11-11 21:21:21,171 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:21:21,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-11-11 21:21:21,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2020-11-11 21:21:21,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.6192468619246863) internal successors, (626), 239 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:21,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 626 transitions. [2020-11-11 21:21:21,176 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 626 transitions. Word has length 14 [2020-11-11 21:21:21,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:21,177 INFO L481 AbstractCegarLoop]: Abstraction has 240 states and 626 transitions. [2020-11-11 21:21:21,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:21,177 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 626 transitions. [2020-11-11 21:21:21,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:21:21,178 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:21,178 INFO L494 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:21,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:21:21,391 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:21,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:21,391 INFO L82 PathProgramCache]: Analyzing trace with hash 879373793, now seen corresponding path program 41 times [2020-11-11 21:21:21,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:21,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434820112] [2020-11-11 21:21:21,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:21,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:21,520 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:21,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434820112] [2020-11-11 21:21:21,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376843250] [2020-11-11 21:21:21,521 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:21:21,589 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-11 21:21:21,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:21:21,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:21:21,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:21,774 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:21:21,797 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:21,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:21,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:21:21,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990986101] [2020-11-11 21:21:21,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:21:21,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:21,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:21:21,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:21:21,799 INFO L87 Difference]: Start difference. First operand 240 states and 626 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:22,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:22,798 INFO L93 Difference]: Finished difference Result 324 states and 810 transitions. [2020-11-11 21:21:22,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-11 21:21:22,799 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 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 14 [2020-11-11 21:21:22,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:22,801 INFO L225 Difference]: With dead ends: 324 [2020-11-11 21:21:22,801 INFO L226 Difference]: Without dead ends: 308 [2020-11-11 21:21:22,801 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=396, Invalid=1010, Unknown=0, NotChecked=0, Total=1406 [2020-11-11 21:21:22,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2020-11-11 21:21:22,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 239. [2020-11-11 21:21:22,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.630252100840336) internal successors, (626), 238 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:22,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 626 transitions. [2020-11-11 21:21:22,808 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 626 transitions. Word has length 14 [2020-11-11 21:21:22,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:22,808 INFO L481 AbstractCegarLoop]: Abstraction has 239 states and 626 transitions. [2020-11-11 21:21:22,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:22,808 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 626 transitions. [2020-11-11 21:21:22,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:21:22,809 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:22,809 INFO L494 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:23,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-11-11 21:21:23,023 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:23,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:23,023 INFO L82 PathProgramCache]: Analyzing trace with hash 855363053, now seen corresponding path program 42 times [2020-11-11 21:21:23,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:23,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362110087] [2020-11-11 21:21:23,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:23,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:23,149 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:23,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362110087] [2020-11-11 21:21:23,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252773446] [2020-11-11 21:21:23,150 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 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 [2020-11-11 21:21:23,212 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-11 21:21:23,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:21:23,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:21:23,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:23,455 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:23,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:23,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:21:23,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069321654] [2020-11-11 21:21:23,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:21:23,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:23,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:21:23,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:21:23,457 INFO L87 Difference]: Start difference. First operand 239 states and 626 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:23,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:23,881 INFO L93 Difference]: Finished difference Result 319 states and 788 transitions. [2020-11-11 21:21:23,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-11 21:21:23,882 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 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 14 [2020-11-11 21:21:23,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:23,885 INFO L225 Difference]: With dead ends: 319 [2020-11-11 21:21:23,885 INFO L226 Difference]: Without dead ends: 306 [2020-11-11 21:21:23,885 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=180, Invalid=522, Unknown=0, NotChecked=0, Total=702 [2020-11-11 21:21:23,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-11-11 21:21:23,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 240. [2020-11-11 21:21:23,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.6234309623430963) internal successors, (627), 239 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:23,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 627 transitions. [2020-11-11 21:21:23,891 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 627 transitions. Word has length 14 [2020-11-11 21:21:23,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:23,891 INFO L481 AbstractCegarLoop]: Abstraction has 240 states and 627 transitions. [2020-11-11 21:21:23,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:23,892 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 627 transitions. [2020-11-11 21:21:23,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:21:23,892 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:23,892 INFO L494 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:24,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:21:24,107 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:24,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:24,107 INFO L82 PathProgramCache]: Analyzing trace with hash 870406702, now seen corresponding path program 43 times [2020-11-11 21:21:24,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:24,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482446885] [2020-11-11 21:21:24,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:24,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:24,239 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:24,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482446885] [2020-11-11 21:21:24,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589786684] [2020-11-11 21:21:24,240 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:21:24,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:24,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:21:24,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:24,509 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:21:24,537 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:24,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:24,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:21:24,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589523720] [2020-11-11 21:21:24,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:21:24,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:24,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:21:24,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:21:24,539 INFO L87 Difference]: Start difference. First operand 240 states and 627 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:25,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:25,644 INFO L93 Difference]: Finished difference Result 332 states and 835 transitions. [2020-11-11 21:21:25,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-11 21:21:25,644 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 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 14 [2020-11-11 21:21:25,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:25,647 INFO L225 Difference]: With dead ends: 332 [2020-11-11 21:21:25,647 INFO L226 Difference]: Without dead ends: 325 [2020-11-11 21:21:25,647 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=468, Invalid=1172, Unknown=0, NotChecked=0, Total=1640 [2020-11-11 21:21:25,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2020-11-11 21:21:25,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 242. [2020-11-11 21:21:25,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.6431535269709543) internal successors, (637), 241 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:25,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 637 transitions. [2020-11-11 21:21:25,653 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 637 transitions. Word has length 14 [2020-11-11 21:21:25,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:25,653 INFO L481 AbstractCegarLoop]: Abstraction has 242 states and 637 transitions. [2020-11-11 21:21:25,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:25,654 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 637 transitions. [2020-11-11 21:21:25,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:21:25,654 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:25,655 INFO L494 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:25,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-11-11 21:21:25,870 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:25,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:25,870 INFO L82 PathProgramCache]: Analyzing trace with hash 870407663, now seen corresponding path program 44 times [2020-11-11 21:21:25,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:25,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373658450] [2020-11-11 21:21:25,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:25,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:26,008 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:26,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373658450] [2020-11-11 21:21:26,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730157439] [2020-11-11 21:21:26,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:21:26,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:21:26,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:21:26,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:21:26,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:26,285 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:21:26,376 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:26,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:26,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:21:26,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396550658] [2020-11-11 21:21:26,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:21:26,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:26,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:21:26,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:21:26,378 INFO L87 Difference]: Start difference. First operand 242 states and 637 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:27,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:27,611 INFO L93 Difference]: Finished difference Result 343 states and 857 transitions. [2020-11-11 21:21:27,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-11 21:21:27,612 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 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 14 [2020-11-11 21:21:27,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:27,614 INFO L225 Difference]: With dead ends: 343 [2020-11-11 21:21:27,614 INFO L226 Difference]: Without dead ends: 325 [2020-11-11 21:21:27,615 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=481, Invalid=1159, Unknown=0, NotChecked=0, Total=1640 [2020-11-11 21:21:27,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2020-11-11 21:21:27,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 242. [2020-11-11 21:21:27,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.6390041493775933) internal successors, (636), 241 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:27,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 636 transitions. [2020-11-11 21:21:27,620 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 636 transitions. Word has length 14 [2020-11-11 21:21:27,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:27,621 INFO L481 AbstractCegarLoop]: Abstraction has 242 states and 636 transitions. [2020-11-11 21:21:27,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:27,621 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 636 transitions. [2020-11-11 21:21:27,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:21:27,622 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:27,622 INFO L494 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:27,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-11-11 21:21:27,834 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:27,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:27,834 INFO L82 PathProgramCache]: Analyzing trace with hash 126049582, now seen corresponding path program 45 times [2020-11-11 21:21:27,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:27,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440511031] [2020-11-11 21:21:27,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:27,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:27,963 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:27,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440511031] [2020-11-11 21:21:27,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677226694] [2020-11-11 21:21:27,964 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 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 [2020-11-11 21:21:28,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-11 21:21:28,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:21:28,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:21:28,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:28,288 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:28,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:28,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:21:28,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434078339] [2020-11-11 21:21:28,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:21:28,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:28,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:21:28,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:21:28,290 INFO L87 Difference]: Start difference. First operand 242 states and 636 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:28,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:28,722 INFO L93 Difference]: Finished difference Result 331 states and 822 transitions. [2020-11-11 21:21:28,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-11 21:21:28,723 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 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 14 [2020-11-11 21:21:28,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:28,725 INFO L225 Difference]: With dead ends: 331 [2020-11-11 21:21:28,725 INFO L226 Difference]: Without dead ends: 326 [2020-11-11 21:21:28,725 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2020-11-11 21:21:28,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2020-11-11 21:21:28,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 247. [2020-11-11 21:21:28,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.6463414634146343) internal successors, (651), 246 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:28,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 651 transitions. [2020-11-11 21:21:28,732 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 651 transitions. Word has length 14 [2020-11-11 21:21:28,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:28,732 INFO L481 AbstractCegarLoop]: Abstraction has 247 states and 651 transitions. [2020-11-11 21:21:28,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:28,734 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 651 transitions. [2020-11-11 21:21:28,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:21:28,734 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:28,735 INFO L494 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:28,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-11-11 21:21:28,948 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:28,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:28,948 INFO L82 PathProgramCache]: Analyzing trace with hash 126050543, now seen corresponding path program 46 times [2020-11-11 21:21:28,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:28,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842655782] [2020-11-11 21:21:28,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:28,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:29,071 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:29,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842655782] [2020-11-11 21:21:29,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205566941] [2020-11-11 21:21:29,071 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 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 [2020-11-11 21:21:29,131 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 21:21:29,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:21:29,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:21:29,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:29,406 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:29,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:29,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:21:29,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348136919] [2020-11-11 21:21:29,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:21:29,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:29,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:21:29,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:21:29,407 INFO L87 Difference]: Start difference. First operand 247 states and 651 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:29,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:29,848 INFO L93 Difference]: Finished difference Result 332 states and 818 transitions. [2020-11-11 21:21:29,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-11 21:21:29,849 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 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 14 [2020-11-11 21:21:29,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:29,851 INFO L225 Difference]: With dead ends: 332 [2020-11-11 21:21:29,852 INFO L226 Difference]: Without dead ends: 318 [2020-11-11 21:21:29,852 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=173, Invalid=529, Unknown=0, NotChecked=0, Total=702 [2020-11-11 21:21:29,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2020-11-11 21:21:29,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 247. [2020-11-11 21:21:29,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.6422764227642275) internal successors, (650), 246 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:29,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 650 transitions. [2020-11-11 21:21:29,858 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 650 transitions. Word has length 14 [2020-11-11 21:21:29,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:29,858 INFO L481 AbstractCegarLoop]: Abstraction has 247 states and 650 transitions. [2020-11-11 21:21:29,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:29,858 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 650 transitions. [2020-11-11 21:21:29,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:21:29,859 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:29,859 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:30,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-11-11 21:21:30,073 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:30,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:30,073 INFO L82 PathProgramCache]: Analyzing trace with hash 592426881, now seen corresponding path program 47 times [2020-11-11 21:21:30,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:30,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085891140] [2020-11-11 21:21:30,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:30,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:30,197 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:30,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085891140] [2020-11-11 21:21:30,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982753875] [2020-11-11 21:21:30,198 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 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 [2020-11-11 21:21:30,258 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:21:30,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:21:30,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:21:30,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:30,467 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:21:30,491 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:30,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:30,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:21:30,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105339620] [2020-11-11 21:21:30,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:21:30,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:30,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:21:30,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:21:30,492 INFO L87 Difference]: Start difference. First operand 247 states and 650 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:31,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:31,793 INFO L93 Difference]: Finished difference Result 345 states and 869 transitions. [2020-11-11 21:21:31,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-11 21:21:31,794 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 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 14 [2020-11-11 21:21:31,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:31,796 INFO L225 Difference]: With dead ends: 345 [2020-11-11 21:21:31,796 INFO L226 Difference]: Without dead ends: 336 [2020-11-11 21:21:31,797 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=570, Invalid=1410, Unknown=0, NotChecked=0, Total=1980 [2020-11-11 21:21:31,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2020-11-11 21:21:31,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 254. [2020-11-11 21:21:31,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 2.707509881422925) internal successors, (685), 253 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:31,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 685 transitions. [2020-11-11 21:21:31,802 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 685 transitions. Word has length 14 [2020-11-11 21:21:31,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:31,802 INFO L481 AbstractCegarLoop]: Abstraction has 254 states and 685 transitions. [2020-11-11 21:21:31,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:31,802 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 685 transitions. [2020-11-11 21:21:31,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:21:31,803 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:31,803 INFO L494 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:32,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:21:32,016 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:32,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:32,016 INFO L82 PathProgramCache]: Analyzing trace with hash 592427842, now seen corresponding path program 48 times [2020-11-11 21:21:32,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:32,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896561952] [2020-11-11 21:21:32,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:32,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:32,152 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:32,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896561952] [2020-11-11 21:21:32,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629765541] [2020-11-11 21:21:32,153 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 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 [2020-11-11 21:21:32,213 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-11 21:21:32,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:21:32,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:21:32,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:32,450 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:21:35,508 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 27 [2020-11-11 21:21:35,510 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:35,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:35,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-11-11 21:21:35,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599935862] [2020-11-11 21:21:35,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 21:21:35,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:35,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 21:21:35,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=240, Unknown=1, NotChecked=0, Total=306 [2020-11-11 21:21:35,512 INFO L87 Difference]: Start difference. First operand 254 states and 685 transitions. Second operand has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 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) [2020-11-11 21:21:40,402 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2020-11-11 21:21:47,174 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 24 [2020-11-11 21:21:53,538 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2020-11-11 21:22:07,198 WARN L193 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-11-11 21:22:09,818 WARN L193 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 44 DAG size of output: 23 [2020-11-11 21:22:20,282 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-11-11 21:22:27,037 WARN L193 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 39 [2020-11-11 21:22:40,276 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 37 [2020-11-11 21:23:22,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:23:22,182 INFO L93 Difference]: Finished difference Result 443 states and 1092 transitions. [2020-11-11 21:23:22,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-11-11 21:23:22,184 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 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 14 [2020-11-11 21:23:22,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:23:22,187 INFO L225 Difference]: With dead ends: 443 [2020-11-11 21:23:22,187 INFO L226 Difference]: Without dead ends: 436 [2020-11-11 21:23:22,188 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 763 ImplicationChecksByTransitivity, 56.6s TimeCoverageRelationStatistics Valid=715, Invalid=1920, Unknown=17, NotChecked=0, Total=2652 [2020-11-11 21:23:22,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2020-11-11 21:23:22,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 255. [2020-11-11 21:23:22,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 2.7086614173228347) internal successors, (688), 254 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:23:22,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 688 transitions. [2020-11-11 21:23:22,205 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 688 transitions. Word has length 14 [2020-11-11 21:23:22,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:23:22,205 INFO L481 AbstractCegarLoop]: Abstraction has 255 states and 688 transitions. [2020-11-11 21:23:22,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 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) [2020-11-11 21:23:22,205 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 688 transitions. [2020-11-11 21:23:22,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:23:22,206 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:23:22,206 INFO L494 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:23:22,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:23:22,418 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:23:22,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:23:22,418 INFO L82 PathProgramCache]: Analyzing trace with hash 592456672, now seen corresponding path program 49 times [2020-11-11 21:23:22,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:23:22,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007886233] [2020-11-11 21:23:22,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:23:22,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:23:22,564 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:23:22,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007886233] [2020-11-11 21:23:22,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370810501] [2020-11-11 21:23:22,565 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 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 [2020-11-11 21:23:22,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:23:22,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:23:22,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:23:22,898 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:23:22,951 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:23:22,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:23:22,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:23:22,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614540479] [2020-11-11 21:23:22,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:23:22,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:23:22,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:23:22,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:23:22,952 INFO L87 Difference]: Start difference. First operand 255 states and 688 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:23:24,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:23:24,421 INFO L93 Difference]: Finished difference Result 379 states and 957 transitions. [2020-11-11 21:23:24,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-11 21:23:24,422 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 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 14 [2020-11-11 21:23:24,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:23:24,424 INFO L225 Difference]: With dead ends: 379 [2020-11-11 21:23:24,424 INFO L226 Difference]: Without dead ends: 372 [2020-11-11 21:23:24,424 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=455, Invalid=1267, Unknown=0, NotChecked=0, Total=1722 [2020-11-11 21:23:24,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2020-11-11 21:23:24,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 256. [2020-11-11 21:23:24,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 2.7176470588235295) internal successors, (693), 255 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:23:24,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 693 transitions. [2020-11-11 21:23:24,430 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 693 transitions. Word has length 14 [2020-11-11 21:23:24,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:23:24,430 INFO L481 AbstractCegarLoop]: Abstraction has 256 states and 693 transitions. [2020-11-11 21:23:24,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:23:24,431 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 693 transitions. [2020-11-11 21:23:24,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:23:24,431 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:23:24,431 INFO L494 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:23:24,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:23:24,632 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:23:24,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:23:24,633 INFO L82 PathProgramCache]: Analyzing trace with hash 592457633, now seen corresponding path program 50 times [2020-11-11 21:23:24,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:23:24,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508806450] [2020-11-11 21:23:24,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:23:24,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:23:24,774 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:23:24,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508806450] [2020-11-11 21:23:24,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136767715] [2020-11-11 21:23:24,774 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 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 [2020-11-11 21:23:24,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:23:24,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:23:24,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:23:24,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:23:25,087 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:23:25,095 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:23:25,102 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:23:26,917 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:23:26,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:23:26,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-11-11 21:23:26,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897584795] [2020-11-11 21:23:26,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 21:23:26,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:23:26,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 21:23:26,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=238, Unknown=1, NotChecked=0, Total=306 [2020-11-11 21:23:26,918 INFO L87 Difference]: Start difference. First operand 256 states and 693 transitions. Second operand has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 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) [2020-11-11 21:23:31,234 WARN L193 SmtUtils]: Spent 4.00 s on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-11-11 21:23:31,437 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 24 [2020-11-11 21:23:33,535 WARN L193 SmtUtils]: Spent 2.07 s on a formula simplification that was a NOOP. DAG size: 44 [2020-11-11 21:23:49,975 WARN L193 SmtUtils]: Spent 1.86 s on a formula simplification that was a NOOP. DAG size: 41 [2020-11-11 21:24:16,576 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2020-11-11 21:24:31,113 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2020-11-11 21:24:47,571 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 45 [2020-11-11 21:25:28,338 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 51 [2020-11-11 21:26:10,641 WARN L193 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2020-11-11 21:26:43,197 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 48 [2020-11-11 21:27:07,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:27:07,400 INFO L93 Difference]: Finished difference Result 452 states and 1096 transitions. [2020-11-11 21:27:07,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-11-11 21:27:07,405 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 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 14 [2020-11-11 21:27:07,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:27:07,408 INFO L225 Difference]: With dead ends: 452 [2020-11-11 21:27:07,408 INFO L226 Difference]: Without dead ends: 418 [2020-11-11 21:27:07,409 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 120.1s TimeCoverageRelationStatistics Valid=757, Invalid=2167, Unknown=46, NotChecked=0, Total=2970 [2020-11-11 21:27:07,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2020-11-11 21:27:07,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 254. [2020-11-11 21:27:07,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 2.7035573122529644) internal successors, (684), 253 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:27:07,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 684 transitions. [2020-11-11 21:27:07,414 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 684 transitions. Word has length 14 [2020-11-11 21:27:07,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:27:07,414 INFO L481 AbstractCegarLoop]: Abstraction has 254 states and 684 transitions. [2020-11-11 21:27:07,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 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) [2020-11-11 21:27:07,415 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 684 transitions. [2020-11-11 21:27:07,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:27:07,415 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:27:07,415 INFO L494 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:27:07,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2020-11-11 21:27:07,625 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:27:07,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:27:07,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1007830578, now seen corresponding path program 51 times [2020-11-11 21:27:07,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:27:07,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401354615] [2020-11-11 21:27:07,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:27:07,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:27:07,853 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:27:07,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401354615] [2020-11-11 21:27:07,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24802640] [2020-11-11 21:27:07,854 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 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 [2020-11-11 21:27:07,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-11 21:27:07,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:27:07,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:27:07,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:27:08,433 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:27:08,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:27:08,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:27:08,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338056137] [2020-11-11 21:27:08,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:27:08,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:27:08,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:27:08,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:27:08,435 INFO L87 Difference]: Start difference. First operand 254 states and 684 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:27:09,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:27:09,297 INFO L93 Difference]: Finished difference Result 365 states and 915 transitions. [2020-11-11 21:27:09,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-11 21:27:09,300 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 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 14 [2020-11-11 21:27:09,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:27:09,302 INFO L225 Difference]: With dead ends: 365 [2020-11-11 21:27:09,302 INFO L226 Difference]: Without dead ends: 350 [2020-11-11 21:27:09,303 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2020-11-11 21:27:09,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2020-11-11 21:27:09,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 259. [2020-11-11 21:27:09,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 2.701550387596899) internal successors, (697), 258 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:27:09,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 697 transitions. [2020-11-11 21:27:09,309 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 697 transitions. Word has length 14 [2020-11-11 21:27:09,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:27:09,309 INFO L481 AbstractCegarLoop]: Abstraction has 259 states and 697 transitions. [2020-11-11 21:27:09,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:27:09,309 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 697 transitions. [2020-11-11 21:27:09,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:27:09,310 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:27:09,310 INFO L494 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:27:09,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:27:09,512 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:27:09,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:27:09,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1007801748, now seen corresponding path program 52 times [2020-11-11 21:27:09,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:27:09,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004179208] [2020-11-11 21:27:09,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:27:09,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:27:09,735 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:27:09,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004179208] [2020-11-11 21:27:09,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772471854] [2020-11-11 21:27:09,735 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 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 [2020-11-11 21:27:09,794 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 21:27:09,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:27:09,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:27:09,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:27:10,377 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:27:10,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:27:10,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:27:10,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296616432] [2020-11-11 21:27:10,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:27:10,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:27:10,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:27:10,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:27:10,379 INFO L87 Difference]: Start difference. First operand 259 states and 697 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:27:11,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:27:11,188 INFO L93 Difference]: Finished difference Result 350 states and 879 transitions. [2020-11-11 21:27:11,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-11 21:27:11,191 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 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 14 [2020-11-11 21:27:11,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:27:11,194 INFO L225 Difference]: With dead ends: 350 [2020-11-11 21:27:11,194 INFO L226 Difference]: Without dead ends: 345 [2020-11-11 21:27:11,194 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=168, Invalid=534, Unknown=0, NotChecked=0, Total=702 [2020-11-11 21:27:11,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2020-11-11 21:27:11,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 258. [2020-11-11 21:27:11,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.7042801556420235) internal successors, (695), 257 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:27:11,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 695 transitions. [2020-11-11 21:27:11,200 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 695 transitions. Word has length 14 [2020-11-11 21:27:11,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:27:11,200 INFO L481 AbstractCegarLoop]: Abstraction has 258 states and 695 transitions. [2020-11-11 21:27:11,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:27:11,201 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 695 transitions. [2020-11-11 21:27:11,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:27:11,201 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:27:11,201 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:27:11,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2020-11-11 21:27:11,402 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:27:11,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:27:11,403 INFO L82 PathProgramCache]: Analyzing trace with hash 564987983, now seen corresponding path program 53 times [2020-11-11 21:27:11,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:27:11,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203006545] [2020-11-11 21:27:11,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:27:11,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:27:11,649 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:27:11,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203006545] [2020-11-11 21:27:11,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032503096] [2020-11-11 21:27:11,650 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 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 [2020-11-11 21:27:11,710 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-11 21:27:11,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:27:11,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:27:11,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:27:12,165 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:27:14,415 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:27:14,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:27:14,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-11-11 21:27:14,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163638344] [2020-11-11 21:27:14,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 21:27:14,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:27:14,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 21:27:14,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=241, Unknown=1, NotChecked=0, Total=306 [2020-11-11 21:27:14,417 INFO L87 Difference]: Start difference. First operand 258 states and 695 transitions. Second operand has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 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) [2020-11-11 21:27:19,982 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-11-11 21:27:30,416 WARN L193 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2020-11-11 21:27:34,793 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2020-11-11 21:27:41,118 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2020-11-11 21:28:10,252 WARN L193 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2020-11-11 21:28:18,505 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-11-11 21:28:49,023 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 40 [2020-11-11 21:29:42,263 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 37 [2020-11-11 21:30:16,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:30:16,837 INFO L93 Difference]: Finished difference Result 480 states and 1179 transitions. [2020-11-11 21:30:16,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-11-11 21:30:16,861 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 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 14 [2020-11-11 21:30:16,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:30:16,863 INFO L225 Difference]: With dead ends: 480 [2020-11-11 21:30:16,863 INFO L226 Difference]: Without dead ends: 471 [2020-11-11 21:30:16,864 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 856 ImplicationChecksByTransitivity, 93.6s TimeCoverageRelationStatistics Valid=748, Invalid=2084, Unknown=30, NotChecked=0, Total=2862 [2020-11-11 21:30:16,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2020-11-11 21:30:16,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 268. [2020-11-11 21:30:16,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 2.745318352059925) internal successors, (733), 267 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:30:16,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 733 transitions. [2020-11-11 21:30:16,870 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 733 transitions. Word has length 14 [2020-11-11 21:30:16,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:30:16,870 INFO L481 AbstractCegarLoop]: Abstraction has 268 states and 733 transitions. [2020-11-11 21:30:16,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 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) [2020-11-11 21:30:16,870 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 733 transitions. [2020-11-11 21:30:16,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:30:16,871 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:30:16,871 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:30:17,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:30:17,084 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:30:17,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:30:17,084 INFO L82 PathProgramCache]: Analyzing trace with hash 565016813, now seen corresponding path program 54 times [2020-11-11 21:30:17,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:30:17,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248156147] [2020-11-11 21:30:17,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:30:17,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:30:17,339 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:30:17,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248156147] [2020-11-11 21:30:17,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145283425] [2020-11-11 21:30:17,340 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 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 [2020-11-11 21:30:17,402 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-11 21:30:17,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:30:17,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:30:17,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:30:17,944 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:30:17,947 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:30:17,949 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:30:18,079 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:30:18,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:30:18,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:30:18,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057938786] [2020-11-11 21:30:18,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:30:18,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:30:18,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:30:18,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:30:18,080 INFO L87 Difference]: Start difference. First operand 268 states and 733 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:30:21,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:30:21,123 INFO L93 Difference]: Finished difference Result 435 states and 1100 transitions. [2020-11-11 21:30:21,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-11 21:30:21,126 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 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 14 [2020-11-11 21:30:21,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:30:21,128 INFO L225 Difference]: With dead ends: 435 [2020-11-11 21:30:21,129 INFO L226 Difference]: Without dead ends: 426 [2020-11-11 21:30:21,129 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=459, Invalid=1263, Unknown=0, NotChecked=0, Total=1722 [2020-11-11 21:30:21,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-11-11 21:30:21,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 270. [2020-11-11 21:30:21,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.7620817843866172) internal successors, (743), 269 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:30:21,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 743 transitions. [2020-11-11 21:30:21,134 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 743 transitions. Word has length 14 [2020-11-11 21:30:21,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:30:21,134 INFO L481 AbstractCegarLoop]: Abstraction has 270 states and 743 transitions. [2020-11-11 21:30:21,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:30:21,134 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 743 transitions. [2020-11-11 21:30:21,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:30:21,135 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:30:21,135 INFO L494 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:30:21,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2020-11-11 21:30:21,336 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:30:21,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:30:21,336 INFO L82 PathProgramCache]: Analyzing trace with hash 565017774, now seen corresponding path program 55 times [2020-11-11 21:30:21,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:30:21,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875826534] [2020-11-11 21:30:21,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:30:21,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:30:21,590 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:30:21,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875826534] [2020-11-11 21:30:21,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503195946] [2020-11-11 21:30:21,590 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 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 [2020-11-11 21:30:21,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:30:21,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:30:21,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:30:22,116 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:30:22,118 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:30:22,120 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:30:22,317 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:30:22,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:30:22,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:30:22,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594439173] [2020-11-11 21:30:22,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:30:22,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:30:22,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:30:22,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:30:22,319 INFO L87 Difference]: Start difference. First operand 270 states and 743 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:30:24,118 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2020-11-11 21:30:26,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:30:26,059 INFO L93 Difference]: Finished difference Result 458 states and 1154 transitions. [2020-11-11 21:30:26,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-11 21:30:26,062 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 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 14 [2020-11-11 21:30:26,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:30:26,065 INFO L225 Difference]: With dead ends: 458 [2020-11-11 21:30:26,065 INFO L226 Difference]: Without dead ends: 431 [2020-11-11 21:30:26,065 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=559, Invalid=1603, Unknown=0, NotChecked=0, Total=2162 [2020-11-11 21:30:26,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2020-11-11 21:30:26,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 269. [2020-11-11 21:30:26,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 2.7574626865671643) internal successors, (739), 268 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:30:26,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 739 transitions. [2020-11-11 21:30:26,071 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 739 transitions. Word has length 14 [2020-11-11 21:30:26,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:30:26,071 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 739 transitions. [2020-11-11 21:30:26,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:30:26,071 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 739 transitions. [2020-11-11 21:30:26,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:30:26,072 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:30:26,072 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:30:26,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:30:26,273 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:30:26,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:30:26,273 INFO L82 PathProgramCache]: Analyzing trace with hash 565910543, now seen corresponding path program 56 times [2020-11-11 21:30:26,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:30:26,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423717875] [2020-11-11 21:30:26,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:30:26,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:30:26,540 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:30:26,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423717875] [2020-11-11 21:30:26,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146274726] [2020-11-11 21:30:26,540 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 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 [2020-11-11 21:30:26,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:30:26,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:30:26,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:30:26,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:30:27,105 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:30:27,239 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:30:27,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:30:27,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:30:27,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789118091] [2020-11-11 21:30:27,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:30:27,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:30:27,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:30:27,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:30:27,242 INFO L87 Difference]: Start difference. First operand 269 states and 739 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:30:30,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:30:30,407 INFO L93 Difference]: Finished difference Result 396 states and 1016 transitions. [2020-11-11 21:30:30,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-11 21:30:30,410 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 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 14 [2020-11-11 21:30:30,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:30:30,413 INFO L225 Difference]: With dead ends: 396 [2020-11-11 21:30:30,413 INFO L226 Difference]: Without dead ends: 390 [2020-11-11 21:30:30,414 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=506, Invalid=1474, Unknown=0, NotChecked=0, Total=1980 [2020-11-11 21:30:30,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2020-11-11 21:30:30,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 270. [2020-11-11 21:30:30,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.7657992565055762) internal successors, (744), 269 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:30:30,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 744 transitions. [2020-11-11 21:30:30,419 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 744 transitions. Word has length 14 [2020-11-11 21:30:30,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:30:30,419 INFO L481 AbstractCegarLoop]: Abstraction has 270 states and 744 transitions. [2020-11-11 21:30:30,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:30:30,419 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 744 transitions. [2020-11-11 21:30:30,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:30:30,420 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:30:30,420 INFO L494 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:30:30,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-11-11 21:30:30,621 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:30:30,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:30:30,622 INFO L82 PathProgramCache]: Analyzing trace with hash 565911504, now seen corresponding path program 57 times [2020-11-11 21:30:30,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:30:30,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353347655] [2020-11-11 21:30:30,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:30:30,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:30:30,915 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:30:30,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353347655] [2020-11-11 21:30:30,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534397417] [2020-11-11 21:30:30,916 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 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 [2020-11-11 21:30:30,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-11 21:30:30,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:30:30,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:30:30,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:30:31,599 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:30:31,776 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:30:31,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:30:31,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:30:31,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701178258] [2020-11-11 21:30:31,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:30:31,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:30:31,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:30:31,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:30:31,778 INFO L87 Difference]: Start difference. First operand 270 states and 744 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:30:34,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:30:34,871 INFO L93 Difference]: Finished difference Result 420 states and 1078 transitions. [2020-11-11 21:30:34,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-11 21:30:34,874 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 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 14 [2020-11-11 21:30:34,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:30:34,877 INFO L225 Difference]: With dead ends: 420 [2020-11-11 21:30:34,877 INFO L226 Difference]: Without dead ends: 413 [2020-11-11 21:30:34,878 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=485, Invalid=1321, Unknown=0, NotChecked=0, Total=1806 [2020-11-11 21:30:34,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2020-11-11 21:30:34,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 267. [2020-11-11 21:30:34,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 2.763157894736842) internal successors, (735), 266 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:30:34,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 735 transitions. [2020-11-11 21:30:34,883 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 735 transitions. Word has length 14 [2020-11-11 21:30:34,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:30:34,883 INFO L481 AbstractCegarLoop]: Abstraction has 267 states and 735 transitions. [2020-11-11 21:30:34,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:30:34,883 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 735 transitions. [2020-11-11 21:30:34,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:30:34,884 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:30:34,884 INFO L494 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:30:35,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2020-11-11 21:30:35,085 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:30:35,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:30:35,085 INFO L82 PathProgramCache]: Analyzing trace with hash 565940334, now seen corresponding path program 58 times [2020-11-11 21:30:35,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:30:35,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841981085] [2020-11-11 21:30:35,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:30:35,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:30:35,353 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:30:35,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841981085] [2020-11-11 21:30:35,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516357723] [2020-11-11 21:30:35,353 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 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 [2020-11-11 21:30:35,411 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 21:30:35,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:30:35,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:30:35,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:30:35,899 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:30:36,018 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:30:36,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:30:36,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:30:36,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557349071] [2020-11-11 21:30:36,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:30:36,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:30:36,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:30:36,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:30:36,020 INFO L87 Difference]: Start difference. First operand 267 states and 735 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:30:38,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:30:38,905 INFO L93 Difference]: Finished difference Result 394 states and 1009 transitions. [2020-11-11 21:30:38,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-11 21:30:38,908 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 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 14 [2020-11-11 21:30:38,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:30:38,911 INFO L225 Difference]: With dead ends: 394 [2020-11-11 21:30:38,912 INFO L226 Difference]: Without dead ends: 387 [2020-11-11 21:30:38,912 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=426, Invalid=1214, Unknown=0, NotChecked=0, Total=1640 [2020-11-11 21:30:38,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2020-11-11 21:30:38,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 265. [2020-11-11 21:30:38,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.753787878787879) internal successors, (727), 264 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:30:38,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 727 transitions. [2020-11-11 21:30:38,918 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 727 transitions. Word has length 14 [2020-11-11 21:30:38,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:30:38,918 INFO L481 AbstractCegarLoop]: Abstraction has 265 states and 727 transitions. [2020-11-11 21:30:38,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:30:38,918 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 727 transitions. [2020-11-11 21:30:38,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:30:38,919 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:30:38,919 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:30:39,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:30:39,129 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:30:39,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:30:39,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1798378131, now seen corresponding path program 59 times [2020-11-11 21:30:39,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:30:39,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036214136] [2020-11-11 21:30:39,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:30:39,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:30:39,395 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:30:39,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036214136] [2020-11-11 21:30:39,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188509802] [2020-11-11 21:30:39,396 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 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 [2020-11-11 21:30:39,462 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-11 21:30:39,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:30:39,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:30:39,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:30:40,019 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:30:40,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:30:40,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:30:40,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762914028] [2020-11-11 21:30:40,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:30:40,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:30:40,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:30:40,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:30:40,020 INFO L87 Difference]: Start difference. First operand 265 states and 727 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:30:41,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:30:41,026 INFO L93 Difference]: Finished difference Result 382 states and 976 transitions. [2020-11-11 21:30:41,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-11 21:30:41,030 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 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 14 [2020-11-11 21:30:41,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:30:41,032 INFO L225 Difference]: With dead ends: 382 [2020-11-11 21:30:41,032 INFO L226 Difference]: Without dead ends: 377 [2020-11-11 21:30:41,033 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2020-11-11 21:30:41,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2020-11-11 21:30:41,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 278. [2020-11-11 21:30:41,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 2.765342960288809) internal successors, (766), 277 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:30:41,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 766 transitions. [2020-11-11 21:30:41,038 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 766 transitions. Word has length 14 [2020-11-11 21:30:41,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:30:41,038 INFO L481 AbstractCegarLoop]: Abstraction has 278 states and 766 transitions. [2020-11-11 21:30:41,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:30:41,038 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 766 transitions. [2020-11-11 21:30:41,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:30:41,039 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:30:41,039 INFO L494 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:30:41,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:30:41,240 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:30:41,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:30:41,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1797483440, now seen corresponding path program 60 times [2020-11-11 21:30:41,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:30:41,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118879059] [2020-11-11 21:30:41,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:30:41,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:30:41,488 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:30:41,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118879059] [2020-11-11 21:30:41,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209588733] [2020-11-11 21:30:41,489 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 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 [2020-11-11 21:30:41,550 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-11 21:30:41,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:30:41,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:30:41,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:30:41,997 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:30:41,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:30:41,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:30:41,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345485979] [2020-11-11 21:30:41,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:30:41,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:30:41,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:30:41,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:30:41,999 INFO L87 Difference]: Start difference. First operand 278 states and 766 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:30:42,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:30:42,851 INFO L93 Difference]: Finished difference Result 390 states and 990 transitions. [2020-11-11 21:30:42,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-11 21:30:42,854 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 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 14 [2020-11-11 21:30:42,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:30:42,857 INFO L225 Difference]: With dead ends: 390 [2020-11-11 21:30:42,858 INFO L226 Difference]: Without dead ends: 374 [2020-11-11 21:30:42,858 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=178, Invalid=524, Unknown=0, NotChecked=0, Total=702 [2020-11-11 21:30:42,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2020-11-11 21:30:42,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 280. [2020-11-11 21:30:42,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.763440860215054) internal successors, (771), 279 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:30:42,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 771 transitions. [2020-11-11 21:30:42,863 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 771 transitions. Word has length 14 [2020-11-11 21:30:42,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:30:42,863 INFO L481 AbstractCegarLoop]: Abstraction has 280 states and 771 transitions. [2020-11-11 21:30:42,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:30:42,863 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 771 transitions. [2020-11-11 21:30:42,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:30:42,864 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:30:42,864 INFO L494 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:30:43,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2020-11-11 21:30:43,066 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:30:43,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:30:43,066 INFO L82 PathProgramCache]: Analyzing trace with hash -285648607, now seen corresponding path program 61 times [2020-11-11 21:30:43,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:30:43,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763298921] [2020-11-11 21:30:43,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:30:43,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:30:43,308 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:30:43,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763298921] [2020-11-11 21:30:43,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781147839] [2020-11-11 21:30:43,308 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 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 [2020-11-11 21:30:43,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:30:43,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:30:43,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:30:43,719 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:30:43,758 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:30:43,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:30:43,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:30:43,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389909301] [2020-11-11 21:30:43,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:30:43,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:30:43,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:30:43,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:30:43,760 INFO L87 Difference]: Start difference. First operand 280 states and 771 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:30:45,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:30:45,630 INFO L93 Difference]: Finished difference Result 306 states and 814 transitions. [2020-11-11 21:30:45,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-11 21:30:45,633 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 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 14 [2020-11-11 21:30:45,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:30:45,635 INFO L225 Difference]: With dead ends: 306 [2020-11-11 21:30:45,635 INFO L226 Difference]: Without dead ends: 296 [2020-11-11 21:30:45,636 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=406, Invalid=1154, Unknown=0, NotChecked=0, Total=1560 [2020-11-11 21:30:45,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2020-11-11 21:30:45,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 281. [2020-11-11 21:30:45,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.742857142857143) internal successors, (768), 280 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:30:45,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 768 transitions. [2020-11-11 21:30:45,643 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 768 transitions. Word has length 14 [2020-11-11 21:30:45,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:30:45,643 INFO L481 AbstractCegarLoop]: Abstraction has 281 states and 768 transitions. [2020-11-11 21:30:45,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:30:45,643 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 768 transitions. [2020-11-11 21:30:45,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:30:45,644 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:30:45,644 INFO L494 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:30:45,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:30:45,856 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:30:45,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:30:45,857 INFO L82 PathProgramCache]: Analyzing trace with hash -284725086, now seen corresponding path program 62 times [2020-11-11 21:30:45,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:30:45,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432228266] [2020-11-11 21:30:45,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:30:45,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:30:46,143 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:30:46,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432228266] [2020-11-11 21:30:46,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927617497] [2020-11-11 21:30:46,143 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 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 [2020-11-11 21:30:46,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:30:46,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:30:46,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:30:46,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:30:46,684 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:30:46,815 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:30:46,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:30:46,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:30:46,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345440684] [2020-11-11 21:30:46,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:30:46,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:30:46,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:30:46,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:30:46,816 INFO L87 Difference]: Start difference. First operand 281 states and 768 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:30:50,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:30:50,768 INFO L93 Difference]: Finished difference Result 423 states and 1082 transitions. [2020-11-11 21:30:50,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-11-11 21:30:50,771 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 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 14 [2020-11-11 21:30:50,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:30:50,774 INFO L225 Difference]: With dead ends: 423 [2020-11-11 21:30:50,774 INFO L226 Difference]: Without dead ends: 412 [2020-11-11 21:30:50,775 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=674, Invalid=1978, Unknown=0, NotChecked=0, Total=2652 [2020-11-11 21:30:50,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2020-11-11 21:30:50,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 284. [2020-11-11 21:30:50,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.7597173144876326) internal successors, (781), 283 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:30:50,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 781 transitions. [2020-11-11 21:30:50,781 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 781 transitions. Word has length 14 [2020-11-11 21:30:50,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:30:50,781 INFO L481 AbstractCegarLoop]: Abstraction has 284 states and 781 transitions. [2020-11-11 21:30:50,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:30:50,782 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 781 transitions. [2020-11-11 21:30:50,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:30:50,782 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:30:50,782 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:30:50,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2020-11-11 21:30:50,983 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:30:50,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:30:50,984 INFO L82 PathProgramCache]: Analyzing trace with hash -284724125, now seen corresponding path program 63 times [2020-11-11 21:30:50,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:30:50,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7101550] [2020-11-11 21:30:50,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:30:50,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:30:51,273 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:30:51,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7101550] [2020-11-11 21:30:51,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106355345] [2020-11-11 21:30:51,274 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 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 [2020-11-11 21:30:51,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-11 21:30:51,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:30:51,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:30:51,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:30:51,862 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:30:52,043 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:30:52,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:30:52,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:30:52,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824642405] [2020-11-11 21:30:52,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:30:52,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:30:52,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:30:52,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:30:52,044 INFO L87 Difference]: Start difference. First operand 284 states and 781 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:30:53,019 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 27 [2020-11-11 21:30:55,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:30:55,482 INFO L93 Difference]: Finished difference Result 497 states and 1278 transitions. [2020-11-11 21:30:55,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-11 21:30:55,485 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 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 14 [2020-11-11 21:30:55,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:30:55,489 INFO L225 Difference]: With dead ends: 497 [2020-11-11 21:30:55,489 INFO L226 Difference]: Without dead ends: 485 [2020-11-11 21:30:55,489 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=510, Invalid=1470, Unknown=0, NotChecked=0, Total=1980 [2020-11-11 21:30:55,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2020-11-11 21:30:55,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 287. [2020-11-11 21:30:55,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 2.7867132867132867) internal successors, (797), 286 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:30:55,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 797 transitions. [2020-11-11 21:30:55,498 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 797 transitions. Word has length 14 [2020-11-11 21:30:55,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:30:55,498 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 797 transitions. [2020-11-11 21:30:55,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:30:55,498 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 797 transitions. [2020-11-11 21:30:55,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:30:55,499 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:30:55,499 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:30:55,714 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:30:55,715 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:30:55,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:30:55,715 INFO L82 PathProgramCache]: Analyzing trace with hash -284695295, now seen corresponding path program 64 times [2020-11-11 21:30:55,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:30:55,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104943486] [2020-11-11 21:30:55,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:30:55,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:30:55,998 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:30:55,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104943486] [2020-11-11 21:30:55,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504457438] [2020-11-11 21:30:55,999 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 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 [2020-11-11 21:30:56,058 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 21:30:56,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:30:56,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:30:56,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:30:56,557 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:30:56,671 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:30:56,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:30:56,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:30:56,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321956789] [2020-11-11 21:30:56,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:30:56,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:30:56,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:30:56,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:30:56,672 INFO L87 Difference]: Start difference. First operand 287 states and 797 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:00,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:31:00,804 INFO L93 Difference]: Finished difference Result 481 states and 1229 transitions. [2020-11-11 21:31:00,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-11-11 21:31:00,808 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 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 14 [2020-11-11 21:31:00,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:31:00,810 INFO L225 Difference]: With dead ends: 481 [2020-11-11 21:31:00,810 INFO L226 Difference]: Without dead ends: 469 [2020-11-11 21:31:00,811 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=644, Invalid=1806, Unknown=0, NotChecked=0, Total=2450 [2020-11-11 21:31:00,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2020-11-11 21:31:00,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 289. [2020-11-11 21:31:00,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 2.8020833333333335) internal successors, (807), 288 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:00,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 807 transitions. [2020-11-11 21:31:00,819 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 807 transitions. Word has length 14 [2020-11-11 21:31:00,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:31:00,819 INFO L481 AbstractCegarLoop]: Abstraction has 289 states and 807 transitions. [2020-11-11 21:31:00,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:00,819 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 807 transitions. [2020-11-11 21:31:00,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:31:00,820 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:31:00,820 INFO L494 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:31:01,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-11-11 21:31:01,025 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:31:01,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:31:01,025 INFO L82 PathProgramCache]: Analyzing trace with hash -257019456, now seen corresponding path program 65 times [2020-11-11 21:31:01,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:31:01,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207741169] [2020-11-11 21:31:01,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:31:01,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:31:01,297 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:31:01,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207741169] [2020-11-11 21:31:01,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649602627] [2020-11-11 21:31:01,298 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 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 [2020-11-11 21:31:01,359 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:31:01,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:31:01,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:31:01,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:31:01,788 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:31:01,841 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:31:01,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:31:01,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:31:01,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704082964] [2020-11-11 21:31:01,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:31:01,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:31:01,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:31:01,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:31:01,843 INFO L87 Difference]: Start difference. First operand 289 states and 807 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:04,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:31:04,833 INFO L93 Difference]: Finished difference Result 426 states and 1101 transitions. [2020-11-11 21:31:04,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-11-11 21:31:04,837 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 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 14 [2020-11-11 21:31:04,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:31:04,839 INFO L225 Difference]: With dead ends: 426 [2020-11-11 21:31:04,839 INFO L226 Difference]: Without dead ends: 409 [2020-11-11 21:31:04,839 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=703, Invalid=2159, Unknown=0, NotChecked=0, Total=2862 [2020-11-11 21:31:04,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2020-11-11 21:31:04,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 291. [2020-11-11 21:31:04,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.8) internal successors, (812), 290 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:04,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 812 transitions. [2020-11-11 21:31:04,845 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 812 transitions. Word has length 14 [2020-11-11 21:31:04,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:31:04,845 INFO L481 AbstractCegarLoop]: Abstraction has 291 states and 812 transitions. [2020-11-11 21:31:04,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:04,845 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 812 transitions. [2020-11-11 21:31:04,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:31:04,846 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:31:04,846 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:31:05,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:31:05,047 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:31:05,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:31:05,048 INFO L82 PathProgramCache]: Analyzing trace with hash -257018495, now seen corresponding path program 66 times [2020-11-11 21:31:05,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:31:05,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696772624] [2020-11-11 21:31:05,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:31:05,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:31:05,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:31:05,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696772624] [2020-11-11 21:31:05,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010599251] [2020-11-11 21:31:05,346 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 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 [2020-11-11 21:31:05,406 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-11 21:31:05,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:31:05,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:31:05,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:31:05,838 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:31:05,961 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:31:05,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:31:05,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:31:05,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776025784] [2020-11-11 21:31:05,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:31:05,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:31:05,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:31:05,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:31:05,963 INFO L87 Difference]: Start difference. First operand 291 states and 812 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:09,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:31:09,192 INFO L93 Difference]: Finished difference Result 484 states and 1240 transitions. [2020-11-11 21:31:09,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-11-11 21:31:09,196 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 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 14 [2020-11-11 21:31:09,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:31:09,198 INFO L225 Difference]: With dead ends: 484 [2020-11-11 21:31:09,198 INFO L226 Difference]: Without dead ends: 474 [2020-11-11 21:31:09,198 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=562, Invalid=1694, Unknown=0, NotChecked=0, Total=2256 [2020-11-11 21:31:09,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2020-11-11 21:31:09,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 288. [2020-11-11 21:31:09,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 2.794425087108014) internal successors, (802), 287 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:09,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 802 transitions. [2020-11-11 21:31:09,204 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 802 transitions. Word has length 14 [2020-11-11 21:31:09,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:31:09,204 INFO L481 AbstractCegarLoop]: Abstraction has 288 states and 802 transitions. [2020-11-11 21:31:09,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:09,205 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 802 transitions. [2020-11-11 21:31:09,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:31:09,205 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:31:09,205 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:31:09,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2020-11-11 21:31:09,406 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:31:09,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:31:09,407 INFO L82 PathProgramCache]: Analyzing trace with hash -256989665, now seen corresponding path program 67 times [2020-11-11 21:31:09,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:31:09,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014504767] [2020-11-11 21:31:09,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:31:09,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:31:09,743 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:31:09,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014504767] [2020-11-11 21:31:09,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028966958] [2020-11-11 21:31:09,744 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 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 [2020-11-11 21:31:09,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:31:09,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:31:09,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:31:10,205 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:31:10,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:31:10,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:31:10,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:31:10,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471187770] [2020-11-11 21:31:10,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:31:10,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:31:10,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:31:10,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:31:10,258 INFO L87 Difference]: Start difference. First operand 288 states and 802 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:12,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:31:12,712 INFO L93 Difference]: Finished difference Result 462 states and 1187 transitions. [2020-11-11 21:31:12,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-11 21:31:12,716 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 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 14 [2020-11-11 21:31:12,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:31:12,717 INFO L225 Difference]: With dead ends: 462 [2020-11-11 21:31:12,717 INFO L226 Difference]: Without dead ends: 452 [2020-11-11 21:31:12,718 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=482, Invalid=1410, Unknown=0, NotChecked=0, Total=1892 [2020-11-11 21:31:12,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2020-11-11 21:31:12,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 287. [2020-11-11 21:31:12,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 2.7902097902097904) internal successors, (798), 286 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:12,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 798 transitions. [2020-11-11 21:31:12,724 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 798 transitions. Word has length 14 [2020-11-11 21:31:12,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:31:12,724 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 798 transitions. [2020-11-11 21:31:12,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:12,724 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 798 transitions. [2020-11-11 21:31:12,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:31:12,724 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:31:12,724 INFO L494 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:31:12,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:31:12,925 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:31:12,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:31:12,926 INFO L82 PathProgramCache]: Analyzing trace with hash -256988704, now seen corresponding path program 68 times [2020-11-11 21:31:12,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:31:12,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512547988] [2020-11-11 21:31:12,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:31:12,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:31:13,246 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:31:13,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512547988] [2020-11-11 21:31:13,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882279673] [2020-11-11 21:31:13,247 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 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 [2020-11-11 21:31:13,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:31:13,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:31:13,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:31:13,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:31:13,706 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:31:13,765 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:31:13,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:31:13,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:31:13,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735932154] [2020-11-11 21:31:13,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:31:13,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:31:13,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:31:13,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:31:13,767 INFO L87 Difference]: Start difference. First operand 287 states and 798 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:16,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:31:16,924 INFO L93 Difference]: Finished difference Result 475 states and 1211 transitions. [2020-11-11 21:31:16,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-11-11 21:31:16,928 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 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 14 [2020-11-11 21:31:16,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:31:16,930 INFO L225 Difference]: With dead ends: 475 [2020-11-11 21:31:16,930 INFO L226 Difference]: Without dead ends: 446 [2020-11-11 21:31:16,930 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=625, Invalid=1925, Unknown=0, NotChecked=0, Total=2550 [2020-11-11 21:31:16,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2020-11-11 21:31:16,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 273. [2020-11-11 21:31:16,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 2.7536764705882355) internal successors, (749), 272 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:16,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 749 transitions. [2020-11-11 21:31:16,938 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 749 transitions. Word has length 14 [2020-11-11 21:31:16,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:31:16,938 INFO L481 AbstractCegarLoop]: Abstraction has 273 states and 749 transitions. [2020-11-11 21:31:16,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:16,938 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 749 transitions. [2020-11-11 21:31:16,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:31:16,939 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:31:16,939 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:31:17,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:31:17,152 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:31:17,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:31:17,153 INFO L82 PathProgramCache]: Analyzing trace with hash -256095935, now seen corresponding path program 69 times [2020-11-11 21:31:17,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:31:17,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967531887] [2020-11-11 21:31:17,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:31:17,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:31:17,557 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:31:17,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967531887] [2020-11-11 21:31:17,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757336636] [2020-11-11 21:31:17,558 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 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 [2020-11-11 21:31:17,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-11 21:31:17,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:31:17,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:31:17,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:31:18,244 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:31:18,310 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:31:18,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:31:18,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:31:18,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194071729] [2020-11-11 21:31:18,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:31:18,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:31:18,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:31:18,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:31:18,312 INFO L87 Difference]: Start difference. First operand 273 states and 749 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:21,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:31:21,826 INFO L93 Difference]: Finished difference Result 419 states and 1069 transitions. [2020-11-11 21:31:21,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-11-11 21:31:21,830 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 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 14 [2020-11-11 21:31:21,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:31:21,832 INFO L225 Difference]: With dead ends: 419 [2020-11-11 21:31:21,832 INFO L226 Difference]: Without dead ends: 409 [2020-11-11 21:31:21,832 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=610, Invalid=1840, Unknown=0, NotChecked=0, Total=2450 [2020-11-11 21:31:21,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2020-11-11 21:31:21,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 269. [2020-11-11 21:31:21,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 2.7276119402985075) internal successors, (731), 268 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:21,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 731 transitions. [2020-11-11 21:31:21,838 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 731 transitions. Word has length 14 [2020-11-11 21:31:21,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:31:21,838 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 731 transitions. [2020-11-11 21:31:21,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:21,838 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 731 transitions. [2020-11-11 21:31:21,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:31:21,838 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:31:21,839 INFO L494 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:31:22,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:31:22,039 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:31:22,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:31:22,040 INFO L82 PathProgramCache]: Analyzing trace with hash -536472019, now seen corresponding path program 70 times [2020-11-11 21:31:22,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:31:22,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165609810] [2020-11-11 21:31:22,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:31:22,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:31:22,299 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:31:22,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165609810] [2020-11-11 21:31:22,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989696401] [2020-11-11 21:31:22,300 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 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 [2020-11-11 21:31:22,359 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 21:31:22,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:31:22,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:31:22,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:31:22,876 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:31:22,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:31:22,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:31:22,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239662543] [2020-11-11 21:31:22,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:31:22,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:31:22,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:31:22,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:31:22,878 INFO L87 Difference]: Start difference. First operand 269 states and 731 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:23,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:31:23,468 INFO L93 Difference]: Finished difference Result 323 states and 839 transitions. [2020-11-11 21:31:23,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-11 21:31:23,472 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 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 14 [2020-11-11 21:31:23,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:31:23,473 INFO L225 Difference]: With dead ends: 323 [2020-11-11 21:31:23,473 INFO L226 Difference]: Without dead ends: 321 [2020-11-11 21:31:23,474 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-11-11 21:31:23,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2020-11-11 21:31:23,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 279. [2020-11-11 21:31:23,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 2.7302158273381294) internal successors, (759), 278 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:23,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 759 transitions. [2020-11-11 21:31:23,481 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 759 transitions. Word has length 14 [2020-11-11 21:31:23,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:31:23,481 INFO L481 AbstractCegarLoop]: Abstraction has 279 states and 759 transitions. [2020-11-11 21:31:23,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:23,481 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 759 transitions. [2020-11-11 21:31:23,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:31:23,482 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:31:23,482 INFO L494 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:31:23,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:31:23,683 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:31:23,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:31:23,684 INFO L82 PathProgramCache]: Analyzing trace with hash -536471058, now seen corresponding path program 71 times [2020-11-11 21:31:23,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:31:23,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026776599] [2020-11-11 21:31:23,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:31:23,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:31:23,972 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:31:23,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026776599] [2020-11-11 21:31:23,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792996624] [2020-11-11 21:31:23,972 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 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 [2020-11-11 21:31:24,031 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-11 21:31:24,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:31:24,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:31:24,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:31:24,626 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:31:24,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:31:24,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:31:24,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125436571] [2020-11-11 21:31:24,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:31:24,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:31:24,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:31:24,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:31:24,627 INFO L87 Difference]: Start difference. First operand 279 states and 759 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:25,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:31:25,365 INFO L93 Difference]: Finished difference Result 346 states and 887 transitions. [2020-11-11 21:31:25,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-11 21:31:25,369 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 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 14 [2020-11-11 21:31:25,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:31:25,371 INFO L225 Difference]: With dead ends: 346 [2020-11-11 21:31:25,371 INFO L226 Difference]: Without dead ends: 343 [2020-11-11 21:31:25,371 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2020-11-11 21:31:25,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2020-11-11 21:31:25,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 279. [2020-11-11 21:31:25,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 2.7302158273381294) internal successors, (759), 278 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:25,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 759 transitions. [2020-11-11 21:31:25,377 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 759 transitions. Word has length 14 [2020-11-11 21:31:25,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:31:25,377 INFO L481 AbstractCegarLoop]: Abstraction has 279 states and 759 transitions. [2020-11-11 21:31:25,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:25,377 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 759 transitions. [2020-11-11 21:31:25,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:31:25,378 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:31:25,378 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:31:25,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:31:25,579 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:31:25,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:31:25,580 INFO L82 PathProgramCache]: Analyzing trace with hash -536441267, now seen corresponding path program 72 times [2020-11-11 21:31:25,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:31:25,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024131833] [2020-11-11 21:31:25,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:31:25,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:31:25,853 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:31:25,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024131833] [2020-11-11 21:31:25,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206702203] [2020-11-11 21:31:25,854 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 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 [2020-11-11 21:31:25,915 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-11-11 21:31:25,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:31:25,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:31:25,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:31:26,568 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:31:26,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:31:26,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:31:26,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423804808] [2020-11-11 21:31:26,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:31:26,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:31:26,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:31:26,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:31:26,570 INFO L87 Difference]: Start difference. First operand 279 states and 759 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:27,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:31:27,460 INFO L93 Difference]: Finished difference Result 369 states and 941 transitions. [2020-11-11 21:31:27,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-11 21:31:27,464 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 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 14 [2020-11-11 21:31:27,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:31:27,465 INFO L225 Difference]: With dead ends: 369 [2020-11-11 21:31:27,466 INFO L226 Difference]: Without dead ends: 364 [2020-11-11 21:31:27,466 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2020-11-11 21:31:27,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2020-11-11 21:31:27,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 279. [2020-11-11 21:31:27,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 2.7302158273381294) internal successors, (759), 278 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:27,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 759 transitions. [2020-11-11 21:31:27,472 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 759 transitions. Word has length 14 [2020-11-11 21:31:27,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:31:27,472 INFO L481 AbstractCegarLoop]: Abstraction has 279 states and 759 transitions. [2020-11-11 21:31:27,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:27,472 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 759 transitions. [2020-11-11 21:31:27,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:31:27,473 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:31:27,473 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:31:27,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:31:27,674 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:31:27,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:31:27,675 INFO L82 PathProgramCache]: Analyzing trace with hash -507813077, now seen corresponding path program 73 times [2020-11-11 21:31:27,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:31:27,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622727572] [2020-11-11 21:31:27,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:31:27,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:31:27,940 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:31:27,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622727572] [2020-11-11 21:31:27,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895201507] [2020-11-11 21:31:27,941 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 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 [2020-11-11 21:31:28,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:31:28,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:31:28,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:31:28,530 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:31:28,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:31:28,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:31:28,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874888114] [2020-11-11 21:31:28,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:31:28,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:31:28,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:31:28,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:31:28,531 INFO L87 Difference]: Start difference. First operand 279 states and 759 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:29,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:31:29,378 INFO L93 Difference]: Finished difference Result 374 states and 948 transitions. [2020-11-11 21:31:29,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-11 21:31:29,382 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 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 14 [2020-11-11 21:31:29,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:31:29,383 INFO L225 Difference]: With dead ends: 374 [2020-11-11 21:31:29,383 INFO L226 Difference]: Without dead ends: 369 [2020-11-11 21:31:29,384 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2020-11-11 21:31:29,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2020-11-11 21:31:29,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 282. [2020-11-11 21:31:29,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.7330960854092528) internal successors, (768), 281 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:29,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 768 transitions. [2020-11-11 21:31:29,390 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 768 transitions. Word has length 14 [2020-11-11 21:31:29,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:31:29,390 INFO L481 AbstractCegarLoop]: Abstraction has 282 states and 768 transitions. [2020-11-11 21:31:29,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:29,391 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 768 transitions. [2020-11-11 21:31:29,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:31:29,391 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:31:29,391 INFO L494 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:31:29,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:31:29,592 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:31:29,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:31:29,593 INFO L82 PathProgramCache]: Analyzing trace with hash -506888595, now seen corresponding path program 74 times [2020-11-11 21:31:29,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:31:29,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424825006] [2020-11-11 21:31:29,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:31:29,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:31:29,894 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:31:29,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424825006] [2020-11-11 21:31:29,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118552966] [2020-11-11 21:31:29,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 21:31:29,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:31:29,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:31:29,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:31:29,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:31:30,497 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:31:30,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:31:30,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:31:30,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219203637] [2020-11-11 21:31:30,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:31:30,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:31:30,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:31:30,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:31:30,498 INFO L87 Difference]: Start difference. First operand 282 states and 768 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:31,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:31:31,329 INFO L93 Difference]: Finished difference Result 355 states and 900 transitions. [2020-11-11 21:31:31,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-11 21:31:31,332 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 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 14 [2020-11-11 21:31:31,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:31:31,334 INFO L225 Difference]: With dead ends: 355 [2020-11-11 21:31:31,334 INFO L226 Difference]: Without dead ends: 337 [2020-11-11 21:31:31,334 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2020-11-11 21:31:31,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2020-11-11 21:31:31,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 279. [2020-11-11 21:31:31,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 2.723021582733813) internal successors, (757), 278 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:31,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 757 transitions. [2020-11-11 21:31:31,341 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 757 transitions. Word has length 14 [2020-11-11 21:31:31,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:31:31,341 INFO L481 AbstractCegarLoop]: Abstraction has 279 states and 757 transitions. [2020-11-11 21:31:31,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:31,341 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 757 transitions. [2020-11-11 21:31:31,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:31:31,342 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:31:31,342 INFO L494 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:31:31,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2020-11-11 21:31:31,542 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:31:31,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:31:31,543 INFO L82 PathProgramCache]: Analyzing trace with hash -885548369, now seen corresponding path program 75 times [2020-11-11 21:31:31,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:31:31,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052335280] [2020-11-11 21:31:31,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:31:31,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:31:31,837 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:31:31,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052335280] [2020-11-11 21:31:31,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2504586] [2020-11-11 21:31:31,838 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 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 [2020-11-11 21:31:31,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-11 21:31:31,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:31:31,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 21:31:31,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:31:32,351 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:31:32,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:31:32,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:31:32,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503493097] [2020-11-11 21:31:32,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:31:32,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:31:32,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:31:32,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:31:32,352 INFO L87 Difference]: Start difference. First operand 279 states and 757 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:33,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:31:33,876 INFO L93 Difference]: Finished difference Result 348 states and 887 transitions. [2020-11-11 21:31:33,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 21:31:33,880 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 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 14 [2020-11-11 21:31:33,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:31:33,881 INFO L225 Difference]: With dead ends: 348 [2020-11-11 21:31:33,881 INFO L226 Difference]: Without dead ends: 344 [2020-11-11 21:31:33,882 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=275, Invalid=781, Unknown=0, NotChecked=0, Total=1056 [2020-11-11 21:31:33,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2020-11-11 21:31:33,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 271. [2020-11-11 21:31:33,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 2.759259259259259) internal successors, (745), 270 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:33,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 745 transitions. [2020-11-11 21:31:33,889 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 745 transitions. Word has length 14 [2020-11-11 21:31:33,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:31:33,889 INFO L481 AbstractCegarLoop]: Abstraction has 271 states and 745 transitions. [2020-11-11 21:31:33,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:33,889 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 745 transitions. [2020-11-11 21:31:33,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:31:33,890 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:31:33,890 INFO L494 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:31:34,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:31:34,104 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:31:34,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:31:34,104 INFO L82 PathProgramCache]: Analyzing trace with hash -885519539, now seen corresponding path program 76 times [2020-11-11 21:31:34,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:31:34,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872067685] [2020-11-11 21:31:34,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:31:34,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:31:34,407 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:31:34,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872067685] [2020-11-11 21:31:34,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887540178] [2020-11-11 21:31:34,408 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 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 [2020-11-11 21:31:34,469 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 21:31:34,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:31:34,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:31:34,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:31:34,966 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:31:35,084 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:31:35,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:31:35,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:31:35,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735741328] [2020-11-11 21:31:35,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:31:35,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:31:35,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:31:35,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:31:35,086 INFO L87 Difference]: Start difference. First operand 271 states and 745 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:38,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:31:38,187 INFO L93 Difference]: Finished difference Result 339 states and 867 transitions. [2020-11-11 21:31:38,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-11 21:31:38,191 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 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 14 [2020-11-11 21:31:38,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:31:38,192 INFO L225 Difference]: With dead ends: 339 [2020-11-11 21:31:38,192 INFO L226 Difference]: Without dead ends: 334 [2020-11-11 21:31:38,192 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=481, Invalid=1159, Unknown=0, NotChecked=0, Total=1640 [2020-11-11 21:31:38,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-11-11 21:31:38,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 265. [2020-11-11 21:31:38,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.746212121212121) internal successors, (725), 264 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:38,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 725 transitions. [2020-11-11 21:31:38,200 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 725 transitions. Word has length 14 [2020-11-11 21:31:38,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:31:38,200 INFO L481 AbstractCegarLoop]: Abstraction has 265 states and 725 transitions. [2020-11-11 21:31:38,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:38,200 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 725 transitions. [2020-11-11 21:31:38,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:31:38,201 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:31:38,201 INFO L494 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:31:38,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2020-11-11 21:31:38,414 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:31:38,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:31:38,414 INFO L82 PathProgramCache]: Analyzing trace with hash -885518578, now seen corresponding path program 77 times [2020-11-11 21:31:38,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:31:38,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195129779] [2020-11-11 21:31:38,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:31:38,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:31:38,714 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:31:38,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195129779] [2020-11-11 21:31:38,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347164965] [2020-11-11 21:31:38,715 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 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 [2020-11-11 21:31:38,775 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-11 21:31:38,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:31:38,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:31:38,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:31:39,289 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:31:39,446 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:31:39,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:31:39,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:31:39,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386022979] [2020-11-11 21:31:39,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:31:39,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:31:39,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:31:39,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:31:39,447 INFO L87 Difference]: Start difference. First operand 265 states and 725 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:42,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:31:42,219 INFO L93 Difference]: Finished difference Result 360 states and 906 transitions. [2020-11-11 21:31:42,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-11 21:31:42,222 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 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 14 [2020-11-11 21:31:42,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:31:42,224 INFO L225 Difference]: With dead ends: 360 [2020-11-11 21:31:42,224 INFO L226 Difference]: Without dead ends: 355 [2020-11-11 21:31:42,224 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=468, Invalid=1172, Unknown=0, NotChecked=0, Total=1640 [2020-11-11 21:31:42,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2020-11-11 21:31:42,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 261. [2020-11-11 21:31:42,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 2.7384615384615385) internal successors, (712), 260 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:42,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 712 transitions. [2020-11-11 21:31:42,231 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 712 transitions. Word has length 14 [2020-11-11 21:31:42,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:31:42,232 INFO L481 AbstractCegarLoop]: Abstraction has 261 states and 712 transitions. [2020-11-11 21:31:42,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:42,232 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 712 transitions. [2020-11-11 21:31:42,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:31:42,232 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:31:42,232 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:31:42,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:31:42,439 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:31:42,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:31:42,440 INFO L82 PathProgramCache]: Analyzing trace with hash -884595057, now seen corresponding path program 78 times [2020-11-11 21:31:42,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:31:42,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648999807] [2020-11-11 21:31:42,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:31:42,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:31:42,734 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:31:42,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648999807] [2020-11-11 21:31:42,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236978432] [2020-11-11 21:31:42,734 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 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 [2020-11-11 21:31:42,796 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-11-11 21:31:42,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:31:42,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:31:42,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:31:43,377 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:31:43,530 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:31:43,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:31:43,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:31:43,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101928380] [2020-11-11 21:31:43,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:31:43,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:31:43,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:31:43,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:31:43,532 INFO L87 Difference]: Start difference. First operand 261 states and 712 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:46,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:31:46,845 INFO L93 Difference]: Finished difference Result 386 states and 964 transitions. [2020-11-11 21:31:46,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-11 21:31:46,848 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 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 14 [2020-11-11 21:31:46,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:31:46,850 INFO L225 Difference]: With dead ends: 386 [2020-11-11 21:31:46,850 INFO L226 Difference]: Without dead ends: 376 [2020-11-11 21:31:46,850 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=570, Invalid=1410, Unknown=0, NotChecked=0, Total=1980 [2020-11-11 21:31:46,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2020-11-11 21:31:46,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 250. [2020-11-11 21:31:46,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.7028112449799195) internal successors, (673), 249 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:46,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 673 transitions. [2020-11-11 21:31:46,855 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 673 transitions. Word has length 14 [2020-11-11 21:31:46,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:31:46,856 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 673 transitions. [2020-11-11 21:31:46,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:46,856 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 673 transitions. [2020-11-11 21:31:46,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:31:46,856 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:31:46,856 INFO L494 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:31:47,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:31:47,057 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:31:47,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:31:47,058 INFO L82 PathProgramCache]: Analyzing trace with hash 2877872, now seen corresponding path program 79 times [2020-11-11 21:31:47,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:31:47,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9384977] [2020-11-11 21:31:47,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:31:47,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:31:47,419 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:31:47,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9384977] [2020-11-11 21:31:47,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742475315] [2020-11-11 21:31:47,419 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 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 [2020-11-11 21:31:47,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:31:47,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:31:47,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:31:47,944 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:31:47,992 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:31:47,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:31:47,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:31:47,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001281460] [2020-11-11 21:31:47,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:31:47,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:31:47,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:31:47,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:31:47,993 INFO L87 Difference]: Start difference. First operand 250 states and 673 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:51,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:31:51,199 INFO L93 Difference]: Finished difference Result 380 states and 950 transitions. [2020-11-11 21:31:51,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-11-11 21:31:51,203 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 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 14 [2020-11-11 21:31:51,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:31:51,204 INFO L225 Difference]: With dead ends: 380 [2020-11-11 21:31:51,204 INFO L226 Difference]: Without dead ends: 375 [2020-11-11 21:31:51,205 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=625, Invalid=1925, Unknown=0, NotChecked=0, Total=2550 [2020-11-11 21:31:51,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2020-11-11 21:31:51,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 247. [2020-11-11 21:31:51,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.678861788617886) internal successors, (659), 246 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:51,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 659 transitions. [2020-11-11 21:31:51,210 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 659 transitions. Word has length 14 [2020-11-11 21:31:51,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:31:51,210 INFO L481 AbstractCegarLoop]: Abstraction has 247 states and 659 transitions. [2020-11-11 21:31:51,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:51,210 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 659 transitions. [2020-11-11 21:31:51,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:31:51,211 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:31:51,211 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:31:51,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:31:51,411 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:31:51,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:31:51,412 INFO L82 PathProgramCache]: Analyzing trace with hash 2878833, now seen corresponding path program 80 times [2020-11-11 21:31:51,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:31:51,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114711969] [2020-11-11 21:31:51,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:31:51,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:31:51,825 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:31:51,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114711969] [2020-11-11 21:31:51,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147698618] [2020-11-11 21:31:51,826 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:31:51,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:31:51,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:31:51,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:31:51,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:31:52,433 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:31:52,487 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:31:52,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:31:52,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:31:52,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137070493] [2020-11-11 21:31:52,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:31:52,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:31:52,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:31:52,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:31:52,488 INFO L87 Difference]: Start difference. First operand 247 states and 659 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:55,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:31:55,168 INFO L93 Difference]: Finished difference Result 424 states and 1048 transitions. [2020-11-11 21:31:55,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-11 21:31:55,172 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 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 14 [2020-11-11 21:31:55,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:31:55,173 INFO L225 Difference]: With dead ends: 424 [2020-11-11 21:31:55,174 INFO L226 Difference]: Without dead ends: 414 [2020-11-11 21:31:55,174 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=482, Invalid=1410, Unknown=0, NotChecked=0, Total=1892 [2020-11-11 21:31:55,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2020-11-11 21:31:55,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 241. [2020-11-11 21:31:55,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.654166666666667) internal successors, (637), 240 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:55,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 637 transitions. [2020-11-11 21:31:55,179 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 637 transitions. Word has length 14 [2020-11-11 21:31:55,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:31:55,179 INFO L481 AbstractCegarLoop]: Abstraction has 241 states and 637 transitions. [2020-11-11 21:31:55,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:55,179 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 637 transitions. [2020-11-11 21:31:55,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:31:55,179 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:31:55,180 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:31:55,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:31:55,380 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:31:55,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:31:55,381 INFO L82 PathProgramCache]: Analyzing trace with hash 2907663, now seen corresponding path program 81 times [2020-11-11 21:31:55,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:31:55,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322138821] [2020-11-11 21:31:55,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:31:55,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:31:55,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:31:55,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322138821] [2020-11-11 21:31:55,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395527740] [2020-11-11 21:31:55,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:31:55,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-11 21:31:55,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:31:55,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:31:55,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:31:56,219 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:31:56,288 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:31:56,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:31:56,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:31:56,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277170827] [2020-11-11 21:31:56,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:31:56,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:31:56,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:31:56,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:31:56,289 INFO L87 Difference]: Start difference. First operand 241 states and 637 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:59,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:31:59,796 INFO L93 Difference]: Finished difference Result 408 states and 991 transitions. [2020-11-11 21:31:59,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-11-11 21:31:59,800 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 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 14 [2020-11-11 21:31:59,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:31:59,801 INFO L225 Difference]: With dead ends: 408 [2020-11-11 21:31:59,801 INFO L226 Difference]: Without dead ends: 398 [2020-11-11 21:31:59,802 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=562, Invalid=1694, Unknown=0, NotChecked=0, Total=2256 [2020-11-11 21:31:59,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2020-11-11 21:31:59,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 232. [2020-11-11 21:31:59,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 2.5757575757575757) internal successors, (595), 231 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:59,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 595 transitions. [2020-11-11 21:31:59,807 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 595 transitions. Word has length 14 [2020-11-11 21:31:59,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:31:59,807 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 595 transitions. [2020-11-11 21:31:59,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:59,808 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 595 transitions. [2020-11-11 21:31:59,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:31:59,808 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:31:59,808 INFO L494 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:32:00,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:32:00,009 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:32:00,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:32:00,010 INFO L82 PathProgramCache]: Analyzing trace with hash 31537775, now seen corresponding path program 82 times [2020-11-11 21:32:00,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:32:00,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827401256] [2020-11-11 21:32:00,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:32:00,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:32:00,298 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:32:00,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827401256] [2020-11-11 21:32:00,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849869000] [2020-11-11 21:32:00,299 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:32:00,358 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 21:32:00,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:32:00,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:32:00,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:32:00,773 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:32:00,833 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:32:00,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:32:00,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:32:00,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321401388] [2020-11-11 21:32:00,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:32:00,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:32:00,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:32:00,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:32:00,834 INFO L87 Difference]: Start difference. First operand 232 states and 595 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:32:02,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:32:02,993 INFO L93 Difference]: Finished difference Result 311 states and 732 transitions. [2020-11-11 21:32:02,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-11 21:32:02,997 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 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 14 [2020-11-11 21:32:02,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:32:02,998 INFO L225 Difference]: With dead ends: 311 [2020-11-11 21:32:02,998 INFO L226 Difference]: Without dead ends: 281 [2020-11-11 21:32:02,999 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=391, Invalid=1091, Unknown=0, NotChecked=0, Total=1482 [2020-11-11 21:32:03,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-11-11 21:32:03,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 216. [2020-11-11 21:32:03,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.488372093023256) internal successors, (535), 215 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:32:03,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 535 transitions. [2020-11-11 21:32:03,003 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 535 transitions. Word has length 14 [2020-11-11 21:32:03,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:32:03,003 INFO L481 AbstractCegarLoop]: Abstraction has 216 states and 535 transitions. [2020-11-11 21:32:03,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:32:03,003 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 535 transitions. [2020-11-11 21:32:03,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-11 21:32:03,004 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:32:03,004 INFO L494 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:32:03,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:32:03,205 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:32:03,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:32:03,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1490807139, now seen corresponding path program 83 times [2020-11-11 21:32:03,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:32:03,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849505648] [2020-11-11 21:32:03,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:32:03,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:32:03,664 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:32:03,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849505648] [2020-11-11 21:32:03,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419882268] [2020-11-11 21:32:03,665 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:32:03,723 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-11 21:32:03,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:32:03,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 21:32:03,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:32:04,386 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:32:04,454 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:32:04,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:32:04,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-11-11 21:32:04,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959397937] [2020-11-11 21:32:04,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 21:32:04,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:32:04,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 21:32:04,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2020-11-11 21:32:04,455 INFO L87 Difference]: Start difference. First operand 216 states and 535 transitions. Second operand has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:32:08,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:32:08,054 INFO L93 Difference]: Finished difference Result 309 states and 737 transitions. [2020-11-11 21:32:08,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-11 21:32:08,058 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 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 15 [2020-11-11 21:32:08,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:32:08,059 INFO L225 Difference]: With dead ends: 309 [2020-11-11 21:32:08,060 INFO L226 Difference]: Without dead ends: 295 [2020-11-11 21:32:08,060 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=627, Invalid=1629, Unknown=0, NotChecked=0, Total=2256 [2020-11-11 21:32:08,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-11-11 21:32:08,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 216. [2020-11-11 21:32:08,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.4976744186046513) internal successors, (537), 215 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:32:08,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 537 transitions. [2020-11-11 21:32:08,064 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 537 transitions. Word has length 15 [2020-11-11 21:32:08,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:32:08,064 INFO L481 AbstractCegarLoop]: Abstraction has 216 states and 537 transitions. [2020-11-11 21:32:08,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:32:08,064 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 537 transitions. [2020-11-11 21:32:08,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-11 21:32:08,065 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:32:08,065 INFO L494 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:32:08,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2020-11-11 21:32:08,267 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:32:08,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:32:08,267 INFO L82 PathProgramCache]: Analyzing trace with hash 746450019, now seen corresponding path program 84 times [2020-11-11 21:32:08,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:32:08,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130601130] [2020-11-11 21:32:08,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:32:08,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:32:08,625 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:32:08,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130601130] [2020-11-11 21:32:08,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144256161] [2020-11-11 21:32:08,625 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:32:08,685 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-11 21:32:08,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:32:08,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 21:32:08,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:32:09,388 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:32:09,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:32:09,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-11-11 21:32:09,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857388060] [2020-11-11 21:32:09,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 21:32:09,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:32:09,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 21:32:09,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2020-11-11 21:32:09,390 INFO L87 Difference]: Start difference. First operand 216 states and 537 transitions. Second operand has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2020-11-11 21:32:09,603 WARN L210 SmtUtils]: Removed 5 from assertion stack [2020-11-11 21:32:09,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-11 21:32:09,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:32:09,805 WARN L546 AbstractCegarLoop]: Verification canceled [2020-11-11 21:32:09,809 WARN L250 ceAbstractionStarter]: Timeout [2020-11-11 21:32:09,809 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.11 09:32:09 BasicIcfg [2020-11-11 21:32:09,809 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-11 21:32:09,810 INFO L168 Benchmark]: Toolchain (without parser) took 865115.94 ms. Allocated memory was 302.0 MB in the beginning and 448.8 MB in the end (delta: 146.8 MB). Free memory was 277.3 MB in the beginning and 285.9 MB in the end (delta: -8.6 MB). Peak memory consumption was 139.5 MB. Max. memory is 16.0 GB. [2020-11-11 21:32:09,810 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 302.0 MB. Free memory is still 272.3 MB. There was no memory consumed. Max. memory is 16.0 GB. [2020-11-11 21:32:09,810 INFO L168 Benchmark]: CACSL2BoogieTranslator took 534.93 ms. Allocated memory is still 302.0 MB. Free memory was 276.7 MB in the beginning and 247.9 MB in the end (delta: 28.7 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.0 GB. [2020-11-11 21:32:09,811 INFO L168 Benchmark]: Boogie Procedure Inliner took 53.04 ms. Allocated memory is still 302.0 MB. Free memory was 247.9 MB in the beginning and 284.6 MB in the end (delta: -36.6 MB). Peak memory consumption was 6.7 MB. Max. memory is 16.0 GB. [2020-11-11 21:32:09,811 INFO L168 Benchmark]: Boogie Preprocessor took 29.16 ms. Allocated memory is still 302.0 MB. Free memory was 284.6 MB in the beginning and 282.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2020-11-11 21:32:09,811 INFO L168 Benchmark]: RCFGBuilder took 427.41 ms. Allocated memory is still 302.0 MB. Free memory was 282.5 MB in the beginning and 261.5 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.0 GB. [2020-11-11 21:32:09,811 INFO L168 Benchmark]: TraceAbstraction took 864060.02 ms. Allocated memory was 302.0 MB in the beginning and 448.8 MB in the end (delta: 146.8 MB). Free memory was 260.4 MB in the beginning and 285.9 MB in the end (delta: -25.5 MB). Peak memory consumption was 120.2 MB. Max. memory is 16.0 GB. [2020-11-11 21:32:09,813 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 302.0 MB. Free memory is still 272.3 MB. There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 534.93 ms. Allocated memory is still 302.0 MB. Free memory was 276.7 MB in the beginning and 247.9 MB in the end (delta: 28.7 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 53.04 ms. Allocated memory is still 302.0 MB. Free memory was 247.9 MB in the beginning and 284.6 MB in the end (delta: -36.6 MB). Peak memory consumption was 6.7 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 29.16 ms. Allocated memory is still 302.0 MB. Free memory was 284.6 MB in the beginning and 282.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 427.41 ms. Allocated memory is still 302.0 MB. Free memory was 282.5 MB in the beginning and 261.5 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.0 GB. * TraceAbstraction took 864060.02 ms. Allocated memory was 302.0 MB in the beginning and 448.8 MB in the end (delta: 146.8 MB). Free memory was 260.4 MB in the beginning and 285.9 MB in the end (delta: -25.5 MB). Peak memory consumption was 120.2 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 847 VarBasedMoverChecksPositive, 19 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 19 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 17 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 4.1s, 67 PlacesBefore, 20 PlacesAfterwards, 66 TransitionsBefore, 15 TransitionsAfterwards, 1272 CoEnabledTransitionPairs, 5 FixpointIterations, 16 TrivialSequentialCompositions, 30 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 11 ConcurrentYvCompositions, 4 ChoiceCompositions, 61 TotalNumberOfCompositions, 1222 MoverChecksTotal - TimeoutResultAtElement [Line: 12]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 12). Cancelled while BasicCegarLoop was constructing difference of abstraction (216states) and FLOYD_HOARE automaton (currently 3 states, 19 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 23 for 18ms.. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 61 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 863.9s, OverallIterations: 98, TraceHistogramMax: 7, AutomataDifference: 774.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.1s, HoareTripleCheckerStatistics: 1470 SDtfs, 14392 SDslu, 12087 SDs, 0 SdLazy, 10466 SolverSat, 3307 SolverUnsat, 178 SolverUnknown, 0 SolverNotchecked, 353.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3420 GetRequests, 458 SyntacticMatches, 88 SemanticMatches, 2873 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 26134 ImplicationChecksByTransitivity, 458.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=291occurred in iteration=79, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 97 MinimizatonAttempts, 7343 StatesRemovedByMinimization, 95 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.9s SsaConstructionTime, 2.0s SatisfiabilityAnalysisTime, 58.3s InterpolantComputationTime, 2458 NumberOfCodeBlocks, 2458 NumberOfCodeBlocksAsserted, 299 NumberOfCheckSat, 2268 ConstructedInterpolants, 5 QuantifiedInterpolants, 314249 SizeOfPredicates, 90 NumberOfNonLiveVariables, 9500 ConjunctsInSsa, 931 ConjunctsInUnsatCore, 190 InterpolantComputations, 8 PerfectInterpolantSequences, 36/1122 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown