/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_longer-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-60729f1 [2020-11-11 21:17:43,097 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-11 21:17:43,101 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-11 21:17:43,156 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-11 21:17:43,157 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-11 21:17:43,162 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-11 21:17:43,166 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-11 21:17:43,174 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-11 21:17:43,178 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-11 21:17:43,184 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-11 21:17:43,186 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-11 21:17:43,188 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-11 21:17:43,188 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-11 21:17:43,191 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-11 21:17:43,193 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-11 21:17:43,195 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-11 21:17:43,197 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-11 21:17:43,200 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-11 21:17:43,208 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-11 21:17:43,216 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-11 21:17:43,218 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-11 21:17:43,220 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-11 21:17:43,222 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-11 21:17:43,224 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-11 21:17:43,234 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-11 21:17:43,234 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-11 21:17:43,235 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-11 21:17:43,238 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-11 21:17:43,238 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-11 21:17:43,240 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-11 21:17:43,240 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-11 21:17:43,241 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-11 21:17:43,243 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-11 21:17:43,244 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-11 21:17:43,245 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-11 21:17:43,246 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-11 21:17:43,246 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-11 21:17:43,247 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-11 21:17:43,247 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-11 21:17:43,248 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-11 21:17:43,249 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-11 21:17:43,250 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 21:17:43,304 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-11 21:17:43,304 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-11 21:17:43,308 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-11 21:17:43,308 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-11 21:17:43,309 INFO L138 SettingsManager]: * Use SBE=true [2020-11-11 21:17:43,309 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-11 21:17:43,309 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-11 21:17:43,309 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-11 21:17:43,310 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-11 21:17:43,310 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-11 21:17:43,311 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-11 21:17:43,312 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-11 21:17:43,312 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-11 21:17:43,312 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-11 21:17:43,312 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-11 21:17:43,312 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-11 21:17:43,313 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-11 21:17:43,313 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-11 21:17:43,313 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-11 21:17:43,313 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-11 21:17:43,314 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-11 21:17:43,314 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-11 21:17:43,314 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-11 21:17:43,314 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-11 21:17:43,315 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-11 21:17:43,315 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-11 21:17:43,315 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-11 21:17:43,315 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-11 21:17:43,315 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-11 21:17:43,748 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-11 21:17:43,776 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-11 21:17:43,780 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-11 21:17:43,781 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-11 21:17:43,782 INFO L275 PluginConnector]: CDTParser initialized [2020-11-11 21:17:43,783 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longer-2.i [2020-11-11 21:17:43,863 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d680d7adc/237ee26026f24183b7c4871bf24d73b7/FLAG81b3f62ba [2020-11-11 21:17:44,642 INFO L306 CDTParser]: Found 1 translation units. [2020-11-11 21:17:44,642 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longer-2.i [2020-11-11 21:17:44,669 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d680d7adc/237ee26026f24183b7c4871bf24d73b7/FLAG81b3f62ba [2020-11-11 21:17:44,694 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d680d7adc/237ee26026f24183b7c4871bf24d73b7 [2020-11-11 21:17:44,698 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-11 21:17:44,706 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-11 21:17:44,710 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-11 21:17:44,711 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-11 21:17:44,715 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-11 21:17:44,716 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 09:17:44" (1/1) ... [2020-11-11 21:17:44,722 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55ca651d 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 21:17:44,722 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 09:17:44" (1/1) ... [2020-11-11 21:17:44,731 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-11 21:17:44,796 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-11 21:17:45,241 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-11 21:17:45,254 INFO L203 MainTranslator]: Completed pre-run [2020-11-11 21:17:45,339 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-11 21:17:45,445 INFO L208 MainTranslator]: Completed translation [2020-11-11 21:17:45,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:17:45 WrapperNode [2020-11-11 21:17:45,445 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-11 21:17:45,447 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-11 21:17:45,447 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-11 21:17:45,447 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-11 21:17:45,455 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 21:17:45,471 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 21:17:45,493 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-11 21:17:45,494 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-11 21:17:45,494 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-11 21:17:45,494 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-11 21:17:45,504 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 21:17:45,504 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 21:17:45,508 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 21:17:45,508 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 21:17:45,520 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 21:17:45,525 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 21:17:45,527 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 21:17:45,531 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-11 21:17:45,532 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-11 21:17:45,532 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-11 21:17:45,532 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-11 21:17:45,533 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 21:17:45,637 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-11-11 21:17:45,637 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-11-11 21:17:45,637 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-11-11 21:17:45,638 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-11-11 21:17:45,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-11 21:17:45,639 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-11-11 21:17:45,639 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-11 21:17:45,640 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-11 21:17:45,641 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-11 21:17:45,641 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-11-11 21:17:45,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-11 21:17:45,642 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-11 21:17:45,644 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 21:17:46,237 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-11 21:17:46,238 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-11-11 21:17:46,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 09:17:46 BoogieIcfgContainer [2020-11-11 21:17:46,241 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-11 21:17:46,245 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-11 21:17:46,246 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-11 21:17:46,249 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-11 21:17:46,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.11 09:17:44" (1/3) ... [2020-11-11 21:17:46,251 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@353a9f1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.11 09:17:46, skipping insertion in model container [2020-11-11 21:17:46,251 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 21:17:46,252 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@353a9f1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.11 09:17:46, skipping insertion in model container [2020-11-11 21:17:46,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 09:17:46" (3/3) ... [2020-11-11 21:17:46,254 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench_longer-2.i [2020-11-11 21:17:46,272 WARN L168 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-11-11 21:17:46,273 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-11 21:17:46,277 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-11 21:17:46,278 INFO L351 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-11-11 21:17:46,317 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,317 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,318 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,318 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,318 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,319 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,319 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,319 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,320 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,320 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,321 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,321 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,322 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,322 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,323 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,323 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,323 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,323 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,323 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,324 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,324 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,324 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,324 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,324 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,325 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,325 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,325 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,325 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,326 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,327 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,327 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,328 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,328 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,328 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,328 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,328 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,328 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,329 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,330 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,330 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,330 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,331 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,331 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,331 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,331 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,331 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,332 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,332 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,332 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,332 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,333 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,333 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,333 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,333 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,334 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,334 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,334 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,334 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,337 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,337 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,339 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,340 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,340 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,340 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,340 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,340 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,351 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,351 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,352 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,353 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,353 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,353 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:46,359 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-11-11 21:17:46,372 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-11-11 21:17:46,409 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-11 21:17:46,410 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-11 21:17:46,410 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-11 21:17:46,410 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-11 21:17:46,410 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-11 21:17:46,410 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-11 21:17:46,410 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-11 21:17:46,411 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-11 21:17:46,422 INFO L120 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-11-11 21:17:46,425 INFO L135 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 67 places, 66 transitions, 142 flow [2020-11-11 21:17:46,428 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 67 places, 66 transitions, 142 flow [2020-11-11 21:17:46,430 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 67 places, 66 transitions, 142 flow [2020-11-11 21:17:46,472 INFO L129 PetriNetUnfolder]: 6/64 cut-off events. [2020-11-11 21:17:46,473 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-11-11 21:17:46,478 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 21:17:46,481 INFO L116 LiptonReduction]: Number of co-enabled transitions 1272 [2020-11-11 21:17:49,379 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2020-11-11 21:17:49,559 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2020-11-11 21:17:49,961 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 87 [2020-11-11 21:17:50,110 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-11-11 21:17:50,445 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 87 [2020-11-11 21:17:50,601 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-11-11 21:17:50,617 INFO L131 LiptonReduction]: Checked pairs total: 1222 [2020-11-11 21:17:50,618 INFO L133 LiptonReduction]: Total number of compositions: 61 [2020-11-11 21:17:50,624 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-11-11 21:17:50,634 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 21:17:50,637 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 21:17:50,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-11 21:17:50,642 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:17:50,643 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-11 21:17:50,644 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:17:50,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:17:50,650 INFO L82 PathProgramCache]: Analyzing trace with hash -542665776, now seen corresponding path program 1 times [2020-11-11 21:17:50,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:17:50,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620277407] [2020-11-11 21:17:50,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:17:50,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:17:50,863 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 21:17:50,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620277407] [2020-11-11 21:17:50,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 21:17:50,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-11 21:17:50,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571985694] [2020-11-11 21:17:50,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-11 21:17:50,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:17:50,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-11 21:17:50,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-11 21:17:50,890 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 21:17:50,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:17:50,958 INFO L93 Difference]: Finished difference Result 83 states and 212 transitions. [2020-11-11 21:17:50,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-11 21:17:50,959 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 21:17:50,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:17:50,971 INFO L225 Difference]: With dead ends: 83 [2020-11-11 21:17:50,971 INFO L226 Difference]: Without dead ends: 54 [2020-11-11 21:17:50,972 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 21:17:50,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-11-11 21:17:51,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-11-11 21:17:51,011 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 21:17:51,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 120 transitions. [2020-11-11 21:17:51,013 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 120 transitions. Word has length 6 [2020-11-11 21:17:51,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:17:51,014 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 120 transitions. [2020-11-11 21:17:51,014 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 21:17:51,014 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 120 transitions. [2020-11-11 21:17:51,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-11 21:17:51,015 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:17:51,015 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:17:51,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-11 21:17:51,016 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:17:51,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:17:51,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1810228872, now seen corresponding path program 1 times [2020-11-11 21:17:51,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:17:51,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572132188] [2020-11-11 21:17:51,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:17:51,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:17:51,149 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 21:17:51,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572132188] [2020-11-11 21:17:51,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 21:17:51,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-11 21:17:51,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296395137] [2020-11-11 21:17:51,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-11 21:17:51,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:17:51,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-11 21:17:51,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-11 21:17:51,154 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 21:17:51,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:17:51,232 INFO L93 Difference]: Finished difference Result 70 states and 166 transitions. [2020-11-11 21:17:51,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-11 21:17:51,233 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 21:17:51,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:17:51,235 INFO L225 Difference]: With dead ends: 70 [2020-11-11 21:17:51,235 INFO L226 Difference]: Without dead ends: 64 [2020-11-11 21:17:51,236 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 21:17:51,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-11-11 21:17:51,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 58. [2020-11-11 21:17:51,246 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 21:17:51,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 141 transitions. [2020-11-11 21:17:51,247 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 141 transitions. Word has length 8 [2020-11-11 21:17:51,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:17:51,249 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 141 transitions. [2020-11-11 21:17:51,249 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 21:17:51,249 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 141 transitions. [2020-11-11 21:17:51,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-11 21:17:51,250 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:17:51,250 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:17:51,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-11 21:17:51,250 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:17:51,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:17:51,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1810289415, now seen corresponding path program 1 times [2020-11-11 21:17:51,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:17:51,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503726809] [2020-11-11 21:17:51,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:17:51,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:17:51,332 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 21:17:51,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503726809] [2020-11-11 21:17:51,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 21:17:51,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-11 21:17:51,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558362874] [2020-11-11 21:17:51,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-11 21:17:51,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:17:51,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-11 21:17:51,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-11 21:17:51,340 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 21:17:51,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:17:51,404 INFO L93 Difference]: Finished difference Result 88 states and 205 transitions. [2020-11-11 21:17:51,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-11 21:17:51,405 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 21:17:51,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:17:51,406 INFO L225 Difference]: With dead ends: 88 [2020-11-11 21:17:51,406 INFO L226 Difference]: Without dead ends: 83 [2020-11-11 21:17:51,407 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 21:17:51,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-11-11 21:17:51,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 66. [2020-11-11 21:17:51,416 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 21:17:51,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 157 transitions. [2020-11-11 21:17:51,418 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 157 transitions. Word has length 8 [2020-11-11 21:17:51,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:17:51,418 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 157 transitions. [2020-11-11 21:17:51,418 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 21:17:51,418 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 157 transitions. [2020-11-11 21:17:51,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-11 21:17:51,419 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:17:51,420 INFO L494 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:17:51,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-11 21:17:51,420 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:17:51,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:17:51,421 INFO L82 PathProgramCache]: Analyzing trace with hash -282495891, now seen corresponding path program 2 times [2020-11-11 21:17:51,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:17:51,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433223404] [2020-11-11 21:17:51,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:17:51,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:17:51,544 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 21:17:51,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433223404] [2020-11-11 21:17:51,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611147704] [2020-11-11 21:17:51,544 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 21:17:51,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:17:51,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:17:51,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-11 21:17:51,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:17:51,700 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:17:51,718 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 21:17:51,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:17:51,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-11-11 21:17:51,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174200935] [2020-11-11 21:17:51,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-11 21:17:51,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:17:51,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-11 21:17:51,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-11-11 21:17:51,721 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 21:17:51,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:17:51,918 INFO L93 Difference]: Finished difference Result 91 states and 215 transitions. [2020-11-11 21:17:51,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-11 21:17:51,919 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 21:17:51,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:17:51,920 INFO L225 Difference]: With dead ends: 91 [2020-11-11 21:17:51,920 INFO L226 Difference]: Without dead ends: 85 [2020-11-11 21:17:51,921 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-11-11 21:17:51,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-11-11 21:17:51,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 72. [2020-11-11 21:17:51,930 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 21:17:51,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 174 transitions. [2020-11-11 21:17:51,931 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 174 transitions. Word has length 9 [2020-11-11 21:17:51,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:17:51,931 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 174 transitions. [2020-11-11 21:17:51,931 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 21:17:51,931 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 174 transitions. [2020-11-11 21:17:51,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-11 21:17:51,932 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:17:51,933 INFO L494 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:17:52,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:17:52,148 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:17:52,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:17:52,149 INFO L82 PathProgramCache]: Analyzing trace with hash -284373685, now seen corresponding path program 2 times [2020-11-11 21:17:52,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:17:52,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087798934] [2020-11-11 21:17:52,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:17:52,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:17:52,236 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 21:17:52,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087798934] [2020-11-11 21:17:52,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608367084] [2020-11-11 21:17:52,237 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 21:17:52,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:17:52,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:17:52,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-11 21:17:52,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:17:52,348 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:17:52,359 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 21:17:52,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:17:52,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-11-11 21:17:52,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930222163] [2020-11-11 21:17:52,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-11 21:17:52,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:17:52,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-11 21:17:52,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-11-11 21:17:52,361 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 21:17:52,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:17:52,469 INFO L93 Difference]: Finished difference Result 107 states and 252 transitions. [2020-11-11 21:17:52,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-11 21:17:52,470 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 21:17:52,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:17:52,472 INFO L225 Difference]: With dead ends: 107 [2020-11-11 21:17:52,472 INFO L226 Difference]: Without dead ends: 102 [2020-11-11 21:17:52,472 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 21:17:52,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-11-11 21:17:52,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 77. [2020-11-11 21:17:52,481 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 21:17:52,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 190 transitions. [2020-11-11 21:17:52,483 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 190 transitions. Word has length 9 [2020-11-11 21:17:52,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:17:52,483 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 190 transitions. [2020-11-11 21:17:52,483 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 21:17:52,483 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 190 transitions. [2020-11-11 21:17:52,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-11 21:17:52,484 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:17:52,484 INFO L494 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:17:52,697 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:17:52,698 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:17:52,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:17:52,698 INFO L82 PathProgramCache]: Analyzing trace with hash -167413736, now seen corresponding path program 3 times [2020-11-11 21:17:52,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:17:52,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547640959] [2020-11-11 21:17:52,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:17:52,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:17:52,785 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 21:17:52,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547640959] [2020-11-11 21:17:52,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611009206] [2020-11-11 21:17:52,785 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 21:17:52,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-11 21:17:52,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:17:52,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-11 21:17:52,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:17:52,918 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:17:52,934 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 21:17:52,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:17:52,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-11-11 21:17:52,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512082698] [2020-11-11 21:17:52,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-11 21:17:52,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:17:52,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-11 21:17:52,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-11-11 21:17:52,936 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 21:17:53,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:17:53,120 INFO L93 Difference]: Finished difference Result 104 states and 250 transitions. [2020-11-11 21:17:53,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-11 21:17:53,121 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 21:17:53,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:17:53,122 INFO L225 Difference]: With dead ends: 104 [2020-11-11 21:17:53,122 INFO L226 Difference]: Without dead ends: 98 [2020-11-11 21:17:53,123 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 21:17:53,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-11-11 21:17:53,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 83. [2020-11-11 21:17:53,131 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 21:17:53,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 207 transitions. [2020-11-11 21:17:53,132 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 207 transitions. Word has length 10 [2020-11-11 21:17:53,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:17:53,132 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 207 transitions. [2020-11-11 21:17:53,132 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 21:17:53,133 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 207 transitions. [2020-11-11 21:17:53,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-11 21:17:53,134 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:17:53,134 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:17:53,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:17:53,349 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:17:53,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:17:53,350 INFO L82 PathProgramCache]: Analyzing trace with hash -167712607, now seen corresponding path program 1 times [2020-11-11 21:17:53,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:17:53,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085894175] [2020-11-11 21:17:53,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:17:53,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:17:53,436 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 21:17:53,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085894175] [2020-11-11 21:17:53,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 21:17:53,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-11 21:17:53,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643247545] [2020-11-11 21:17:53,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-11 21:17:53,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:17:53,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-11 21:17:53,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-11 21:17:53,440 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 21:17:53,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:17:53,542 INFO L93 Difference]: Finished difference Result 109 states and 259 transitions. [2020-11-11 21:17:53,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-11 21:17:53,543 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 21:17:53,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:17:53,544 INFO L225 Difference]: With dead ends: 109 [2020-11-11 21:17:53,544 INFO L226 Difference]: Without dead ends: 104 [2020-11-11 21:17:53,544 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 21:17:53,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-11-11 21:17:53,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 84. [2020-11-11 21:17:53,552 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 21:17:53,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 208 transitions. [2020-11-11 21:17:53,553 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 208 transitions. Word has length 10 [2020-11-11 21:17:53,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:17:53,553 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 208 transitions. [2020-11-11 21:17:53,554 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 21:17:53,554 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 208 transitions. [2020-11-11 21:17:53,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-11 21:17:53,556 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:17:53,556 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:17:53,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-11 21:17:53,556 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:17:53,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:17:53,558 INFO L82 PathProgramCache]: Analyzing trace with hash -191723347, now seen corresponding path program 2 times [2020-11-11 21:17:53,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:17:53,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928682318] [2020-11-11 21:17:53,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:17:53,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:17:53,625 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 21:17:53,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928682318] [2020-11-11 21:17:53,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 21:17:53,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-11 21:17:53,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875221646] [2020-11-11 21:17:53,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-11 21:17:53,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:17:53,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-11 21:17:53,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-11 21:17:53,627 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 21:17:53,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:17:53,695 INFO L93 Difference]: Finished difference Result 100 states and 240 transitions. [2020-11-11 21:17:53,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-11 21:17:53,695 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 21:17:53,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:17:53,696 INFO L225 Difference]: With dead ends: 100 [2020-11-11 21:17:53,697 INFO L226 Difference]: Without dead ends: 98 [2020-11-11 21:17:53,697 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 21:17:53,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-11-11 21:17:53,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 86. [2020-11-11 21:17:53,703 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 21:17:53,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 212 transitions. [2020-11-11 21:17:53,705 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 212 transitions. Word has length 10 [2020-11-11 21:17:53,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:17:53,705 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 212 transitions. [2020-11-11 21:17:53,705 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 21:17:53,705 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 212 transitions. [2020-11-11 21:17:53,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-11 21:17:53,706 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:17:53,706 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:17:53,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-11 21:17:53,707 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:17:53,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:17:53,707 INFO L82 PathProgramCache]: Analyzing trace with hash -176678737, now seen corresponding path program 3 times [2020-11-11 21:17:53,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:17:53,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973393563] [2020-11-11 21:17:53,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:17:53,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:17:53,800 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 21:17:53,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973393563] [2020-11-11 21:17:53,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 21:17:53,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-11 21:17:53,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545492315] [2020-11-11 21:17:53,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-11 21:17:53,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:17:53,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-11 21:17:53,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-11 21:17:53,803 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 21:17:53,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:17:53,916 INFO L93 Difference]: Finished difference Result 115 states and 271 transitions. [2020-11-11 21:17:53,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-11 21:17:53,917 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 21:17:53,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:17:53,918 INFO L225 Difference]: With dead ends: 115 [2020-11-11 21:17:53,918 INFO L226 Difference]: Without dead ends: 110 [2020-11-11 21:17:53,919 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-11-11 21:17:53,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-11-11 21:17:53,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 89. [2020-11-11 21:17:53,939 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 21:17:53,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 216 transitions. [2020-11-11 21:17:53,939 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 216 transitions. Word has length 10 [2020-11-11 21:17:53,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:17:53,940 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 216 transitions. [2020-11-11 21:17:53,940 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 21:17:53,940 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 216 transitions. [2020-11-11 21:17:53,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-11 21:17:53,941 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:17:53,941 INFO L494 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:17:53,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-11 21:17:53,942 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:17:53,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:17:53,942 INFO L82 PathProgramCache]: Analyzing trace with hash -225626311, now seen corresponding path program 3 times [2020-11-11 21:17:53,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:17:53,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032706795] [2020-11-11 21:17:53,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:17:53,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:17:54,012 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 21:17:54,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032706795] [2020-11-11 21:17:54,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040788034] [2020-11-11 21:17:54,013 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 21:17:54,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-11 21:17:54,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:17:54,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-11 21:17:54,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:17:54,176 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:17:54,187 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 21:17:54,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:17:54,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-11-11 21:17:54,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044500808] [2020-11-11 21:17:54,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-11 21:17:54,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:17:54,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-11 21:17:54,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-11-11 21:17:54,189 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 21:17:54,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:17:54,363 INFO L93 Difference]: Finished difference Result 128 states and 301 transitions. [2020-11-11 21:17:54,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-11 21:17:54,364 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 21:17:54,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:17:54,365 INFO L225 Difference]: With dead ends: 128 [2020-11-11 21:17:54,365 INFO L226 Difference]: Without dead ends: 123 [2020-11-11 21:17:54,366 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 21:17:54,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-11-11 21:17:54,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 94. [2020-11-11 21:17:54,371 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 21:17:54,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 232 transitions. [2020-11-11 21:17:54,372 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 232 transitions. Word has length 10 [2020-11-11 21:17:54,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:17:54,373 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 232 transitions. [2020-11-11 21:17:54,373 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 21:17:54,374 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 232 transitions. [2020-11-11 21:17:54,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-11 21:17:54,378 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:17:54,379 INFO L494 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:17:54,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:17:54,593 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:17:54,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:17:54,594 INFO L82 PathProgramCache]: Analyzing trace with hash -894834227, now seen corresponding path program 4 times [2020-11-11 21:17:54,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:17:54,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569681042] [2020-11-11 21:17:54,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:17:54,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:17:54,708 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 21:17:54,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569681042] [2020-11-11 21:17:54,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247666118] [2020-11-11 21:17:54,709 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 21:17:54,764 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 21:17:54,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:17:54,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-11 21:17:54,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:17:54,860 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:17:54,876 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 21:17:54,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:17:54,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-11-11 21:17:54,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892553548] [2020-11-11 21:17:54,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 21:17:54,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:17:54,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 21:17:54,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-11-11 21:17:54,879 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 21:17:55,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:17:55,117 INFO L93 Difference]: Finished difference Result 129 states and 307 transitions. [2020-11-11 21:17:55,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-11 21:17:55,118 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 21:17:55,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:17:55,119 INFO L225 Difference]: With dead ends: 129 [2020-11-11 21:17:55,120 INFO L226 Difference]: Without dead ends: 123 [2020-11-11 21:17:55,120 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 21:17:55,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-11-11 21:17:55,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 100. [2020-11-11 21:17:55,125 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 21:17:55,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 249 transitions. [2020-11-11 21:17:55,126 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 249 transitions. Word has length 11 [2020-11-11 21:17:55,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:17:55,126 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 249 transitions. [2020-11-11 21:17:55,126 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 21:17:55,126 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 249 transitions. [2020-11-11 21:17:55,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-11 21:17:55,127 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:17:55,128 INFO L494 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:17:55,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-11-11 21:17:55,341 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:17:55,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:17:55,342 INFO L82 PathProgramCache]: Analyzing trace with hash -895133098, now seen corresponding path program 4 times [2020-11-11 21:17:55,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:17:55,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181528553] [2020-11-11 21:17:55,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:17:55,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:17:55,409 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 21:17:55,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181528553] [2020-11-11 21:17:55,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483703749] [2020-11-11 21:17:55,410 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:17:55,458 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 21:17:55,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:17:55,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-11 21:17:55,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:17:55,528 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:17:55,541 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 21:17:55,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:17:55,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-11-11 21:17:55,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003968370] [2020-11-11 21:17:55,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-11 21:17:55,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:17:55,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-11 21:17:55,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-11-11 21:17:55,543 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 21:17:55,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:17:55,826 INFO L93 Difference]: Finished difference Result 135 states and 320 transitions. [2020-11-11 21:17:55,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-11 21:17:55,827 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 21:17:55,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:17:55,828 INFO L225 Difference]: With dead ends: 135 [2020-11-11 21:17:55,828 INFO L226 Difference]: Without dead ends: 130 [2020-11-11 21:17:55,829 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2020-11-11 21:17:55,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-11-11 21:17:55,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 100. [2020-11-11 21:17:55,836 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 21:17:55,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 249 transitions. [2020-11-11 21:17:55,837 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 249 transitions. Word has length 11 [2020-11-11 21:17:55,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:17:55,837 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 249 transitions. [2020-11-11 21:17:55,837 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 21:17:55,837 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 249 transitions. [2020-11-11 21:17:55,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-11 21:17:55,840 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:17:55,840 INFO L494 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:17:56,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:17:56,050 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:17:56,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:17:56,052 INFO L82 PathProgramCache]: Analyzing trace with hash -919143838, now seen corresponding path program 5 times [2020-11-11 21:17:56,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:17:56,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842720486] [2020-11-11 21:17:56,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:17:56,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:17:56,185 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 21:17:56,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842720486] [2020-11-11 21:17:56,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306377] [2020-11-11 21:17:56,186 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 21:17:56,246 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:17:56,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:17:56,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-11 21:17:56,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:17:56,357 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 21:17:56,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:17:56,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-11-11 21:17:56,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032718629] [2020-11-11 21:17:56,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-11 21:17:56,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:17:56,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-11 21:17:56,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-11-11 21:17:56,361 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 21:17:56,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:17:56,501 INFO L93 Difference]: Finished difference Result 126 states and 299 transitions. [2020-11-11 21:17:56,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-11 21:17:56,502 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 21:17:56,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:17:56,504 INFO L225 Difference]: With dead ends: 126 [2020-11-11 21:17:56,504 INFO L226 Difference]: Without dead ends: 124 [2020-11-11 21:17:56,505 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:17:56,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-11-11 21:17:56,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 103. [2020-11-11 21:17:56,509 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 21:17:56,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 256 transitions. [2020-11-11 21:17:56,514 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 256 transitions. Word has length 11 [2020-11-11 21:17:56,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:17:56,514 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 256 transitions. [2020-11-11 21:17:56,514 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 21:17:56,515 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 256 transitions. [2020-11-11 21:17:56,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-11 21:17:56,515 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:17:56,515 INFO L494 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:17:56,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:17:56,729 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:17:56,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:17:56,730 INFO L82 PathProgramCache]: Analyzing trace with hash -904100189, now seen corresponding path program 6 times [2020-11-11 21:17:56,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:17:56,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780541773] [2020-11-11 21:17:56,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:17:56,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:17:56,804 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 21:17:56,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780541773] [2020-11-11 21:17:56,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042200199] [2020-11-11 21:17:56,804 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 21:17:56,859 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-11-11 21:17:56,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:17:56,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-11 21:17:56,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:17:56,955 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:17:56,966 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 21:17:56,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:17:56,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-11-11 21:17:56,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107081439] [2020-11-11 21:17:56,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-11 21:17:56,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:17:56,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-11 21:17:56,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-11-11 21:17:56,969 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 21:17:57,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:17:57,230 INFO L93 Difference]: Finished difference Result 152 states and 356 transitions. [2020-11-11 21:17:57,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-11 21:17:57,231 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 21:17:57,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:17:57,236 INFO L225 Difference]: With dead ends: 152 [2020-11-11 21:17:57,236 INFO L226 Difference]: Without dead ends: 147 [2020-11-11 21:17:57,237 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 21:17:57,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-11-11 21:17:57,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 104. [2020-11-11 21:17:57,247 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 21:17:57,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 257 transitions. [2020-11-11 21:17:57,248 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 257 transitions. Word has length 11 [2020-11-11 21:17:57,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:17:57,249 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 257 transitions. [2020-11-11 21:17:57,249 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 21:17:57,251 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 257 transitions. [2020-11-11 21:17:57,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-11 21:17:57,251 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:17:57,251 INFO L494 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:17:57,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-11-11 21:17:57,467 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:17:57,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:17:57,468 INFO L82 PathProgramCache]: Analyzing trace with hash -904099228, now seen corresponding path program 7 times [2020-11-11 21:17:57,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:17:57,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040406650] [2020-11-11 21:17:57,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:17:57,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:17:57,547 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 21:17:57,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040406650] [2020-11-11 21:17:57,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840926015] [2020-11-11 21:17:57,548 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 21:17:57,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:17:57,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-11 21:17:57,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:17:57,659 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:17:57,676 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 21:17:57,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:17:57,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-11-11 21:17:57,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106149367] [2020-11-11 21:17:57,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-11 21:17:57,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:17:57,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-11 21:17:57,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-11-11 21:17:57,678 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 21:17:58,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:17:58,017 INFO L93 Difference]: Finished difference Result 166 states and 386 transitions. [2020-11-11 21:17:58,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-11 21:17:58,017 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 21:17:58,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:17:58,019 INFO L225 Difference]: With dead ends: 166 [2020-11-11 21:17:58,019 INFO L226 Difference]: Without dead ends: 158 [2020-11-11 21:17:58,020 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 21:17:58,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-11-11 21:17:58,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 107. [2020-11-11 21:17:58,025 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 21:17:58,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 261 transitions. [2020-11-11 21:17:58,026 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 261 transitions. Word has length 11 [2020-11-11 21:17:58,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:17:58,026 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 261 transitions. [2020-11-11 21:17:58,026 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 21:17:58,026 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 261 transitions. [2020-11-11 21:17:58,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-11 21:17:58,027 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:17:58,027 INFO L494 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:17:58,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-11-11 21:17:58,242 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:17:58,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:17:58,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1182050219, now seen corresponding path program 8 times [2020-11-11 21:17:58,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:17:58,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731108443] [2020-11-11 21:17:58,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:17:58,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:17:58,312 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 21:17:58,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731108443] [2020-11-11 21:17:58,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556043435] [2020-11-11 21:17:58,312 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 21:17:58,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:17:58,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:17:58,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-11 21:17:58,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:17:58,467 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:17:58,477 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 21:17:58,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:17:58,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-11-11 21:17:58,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066125799] [2020-11-11 21:17:58,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-11 21:17:58,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:17:58,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-11 21:17:58,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-11-11 21:17:58,479 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 21:17:58,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:17:58,805 INFO L93 Difference]: Finished difference Result 142 states and 336 transitions. [2020-11-11 21:17:58,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-11 21:17:58,807 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 21:17:58,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:17:58,809 INFO L225 Difference]: With dead ends: 142 [2020-11-11 21:17:58,809 INFO L226 Difference]: Without dead ends: 137 [2020-11-11 21:17:58,809 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 21:17:58,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-11-11 21:17:58,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 107. [2020-11-11 21:17:58,814 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 21:17:58,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 261 transitions. [2020-11-11 21:17:58,815 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 261 transitions. Word has length 11 [2020-11-11 21:17:58,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:17:58,815 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 261 transitions. [2020-11-11 21:17:58,815 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 21:17:58,815 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 261 transitions. [2020-11-11 21:17:58,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-11 21:17:58,816 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:17:58,816 INFO L494 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:17:59,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-11 21:17:59,017 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:17:59,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:17:59,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1595542283, now seen corresponding path program 4 times [2020-11-11 21:17:59,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:17:59,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313137771] [2020-11-11 21:17:59,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:17:59,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:17:59,086 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 21:17:59,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313137771] [2020-11-11 21:17:59,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126056629] [2020-11-11 21:17:59,086 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 21:17:59,136 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 21:17:59,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:17:59,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-11 21:17:59,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:17:59,225 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:17:59,239 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 21:17:59,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:17:59,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-11-11 21:17:59,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120470942] [2020-11-11 21:17:59,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 21:17:59,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:17:59,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 21:17:59,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-11-11 21:17:59,241 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 21:17:59,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:17:59,486 INFO L93 Difference]: Finished difference Result 150 states and 355 transitions. [2020-11-11 21:17:59,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-11 21:17:59,487 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 21:17:59,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:17:59,488 INFO L225 Difference]: With dead ends: 150 [2020-11-11 21:17:59,489 INFO L226 Difference]: Without dead ends: 145 [2020-11-11 21:17:59,489 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=317, Unknown=0, NotChecked=0, Total=462 [2020-11-11 21:17:59,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-11-11 21:17:59,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 113. [2020-11-11 21:17:59,494 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 21:17:59,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 282 transitions. [2020-11-11 21:17:59,495 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 282 transitions. Word has length 11 [2020-11-11 21:17:59,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:17:59,496 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 282 transitions. [2020-11-11 21:17:59,496 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 21:17:59,496 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 282 transitions. [2020-11-11 21:17:59,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-11 21:17:59,496 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:17:59,497 INFO L494 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:17:59,697 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-11 21:17:59,697 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:17:59,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:17:59,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1970032968, now seen corresponding path program 5 times [2020-11-11 21:17:59,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:17:59,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224230125] [2020-11-11 21:17:59,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:17:59,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:17:59,779 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 21:17:59,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224230125] [2020-11-11 21:17:59,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938661404] [2020-11-11 21:17:59,779 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 21:17:59,833 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-11 21:17:59,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:17:59,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:17:59,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:17:59,954 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:17:59,971 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 21:17:59,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:17:59,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:17:59,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950732584] [2020-11-11 21:17:59,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:17:59,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:17:59,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:17:59,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:17:59,975 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 21:18:00,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:18:00,299 INFO L93 Difference]: Finished difference Result 155 states and 369 transitions. [2020-11-11 21:18:00,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-11 21:18:00,299 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 21:18:00,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:18:00,300 INFO L225 Difference]: With dead ends: 155 [2020-11-11 21:18:00,301 INFO L226 Difference]: Without dead ends: 149 [2020-11-11 21:18:00,305 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=198, Invalid=452, Unknown=0, NotChecked=0, Total=650 [2020-11-11 21:18:00,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-11-11 21:18:00,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 119. [2020-11-11 21:18:00,312 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 21:18:00,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 299 transitions. [2020-11-11 21:18:00,318 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 299 transitions. Word has length 12 [2020-11-11 21:18:00,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:18:00,318 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 299 transitions. [2020-11-11 21:18:00,319 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 21:18:00,319 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 299 transitions. [2020-11-11 21:18:00,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-11 21:18:00,320 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:18:00,320 INFO L494 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:18:00,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-11 21:18:00,521 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:18:00,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:18:00,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1970331839, now seen corresponding path program 9 times [2020-11-11 21:18:00,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:18:00,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677606379] [2020-11-11 21:18:00,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:18:00,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:18:00,603 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 21:18:00,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677606379] [2020-11-11 21:18:00,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967981991] [2020-11-11 21:18:00,604 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 21:18:00,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-11 21:18:00,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:18:00,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-11 21:18:00,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:18:00,762 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:18:00,779 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 21:18:00,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:18:00,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-11-11 21:18:00,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715602363] [2020-11-11 21:18:00,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 21:18:00,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:18:00,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 21:18:00,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-11-11 21:18:00,781 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 21:18:01,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:18:01,250 INFO L93 Difference]: Finished difference Result 163 states and 391 transitions. [2020-11-11 21:18:01,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-11 21:18:01,251 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 21:18:01,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:18:01,253 INFO L225 Difference]: With dead ends: 163 [2020-11-11 21:18:01,253 INFO L226 Difference]: Without dead ends: 158 [2020-11-11 21:18:01,253 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=204, Invalid=552, Unknown=0, NotChecked=0, Total=756 [2020-11-11 21:18:01,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-11-11 21:18:01,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 119. [2020-11-11 21:18:01,258 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 21:18:01,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 299 transitions. [2020-11-11 21:18:01,259 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 299 transitions. Word has length 12 [2020-11-11 21:18:01,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:18:01,259 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 299 transitions. [2020-11-11 21:18:01,259 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 21:18:01,259 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 299 transitions. [2020-11-11 21:18:01,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-11 21:18:01,260 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:18:01,260 INFO L494 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:18:01,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:18:01,473 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:18:01,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:18:01,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1994342579, now seen corresponding path program 10 times [2020-11-11 21:18:01,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:18:01,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971655319] [2020-11-11 21:18:01,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:18:01,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:18:01,549 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 21:18:01,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971655319] [2020-11-11 21:18:01,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730069927] [2020-11-11 21:18:01,550 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 21:18:01,605 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 21:18:01,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:18:01,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-11 21:18:01,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:18:01,730 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 21:18:01,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:18:01,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-11-11 21:18:01,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745809468] [2020-11-11 21:18:01,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 21:18:01,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:18:01,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 21:18:01,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-11-11 21:18:01,732 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 21:18:01,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:18:01,915 INFO L93 Difference]: Finished difference Result 150 states and 358 transitions. [2020-11-11 21:18:01,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-11 21:18:01,916 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 21:18:01,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:18:01,917 INFO L225 Difference]: With dead ends: 150 [2020-11-11 21:18:01,917 INFO L226 Difference]: Without dead ends: 148 [2020-11-11 21:18:01,918 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-11-11 21:18:01,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-11-11 21:18:01,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 120. [2020-11-11 21:18:01,922 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 21:18:01,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 302 transitions. [2020-11-11 21:18:01,923 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 302 transitions. Word has length 12 [2020-11-11 21:18:01,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:18:01,923 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 302 transitions. [2020-11-11 21:18:01,923 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 21:18:01,923 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 302 transitions. [2020-11-11 21:18:01,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-11 21:18:01,924 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:18:01,924 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:18:02,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:18:02,136 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:18:02,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:18:02,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1979298930, now seen corresponding path program 11 times [2020-11-11 21:18:02,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:18:02,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539409060] [2020-11-11 21:18:02,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:18:02,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:18:02,207 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 21:18:02,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539409060] [2020-11-11 21:18:02,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654285139] [2020-11-11 21:18:02,208 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 21:18:02,273 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:18:02,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:18:02,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-11 21:18:02,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:18:02,372 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:18:02,387 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 21:18:02,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:18:02,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-11-11 21:18:02,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132528554] [2020-11-11 21:18:02,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 21:18:02,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:18:02,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 21:18:02,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-11-11 21:18:02,389 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 21:18:02,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:18:02,789 INFO L93 Difference]: Finished difference Result 180 states and 429 transitions. [2020-11-11 21:18:02,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-11 21:18:02,789 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 21:18:02,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:18:02,791 INFO L225 Difference]: With dead ends: 180 [2020-11-11 21:18:02,791 INFO L226 Difference]: Without dead ends: 172 [2020-11-11 21:18:02,792 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 21:18:02,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-11-11 21:18:02,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 121. [2020-11-11 21:18:02,797 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 21:18:02,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 303 transitions. [2020-11-11 21:18:02,798 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 303 transitions. Word has length 12 [2020-11-11 21:18:02,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:18:02,798 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 303 transitions. [2020-11-11 21:18:02,798 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 21:18:02,799 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 303 transitions. [2020-11-11 21:18:02,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-11 21:18:02,799 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:18:02,799 INFO L494 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:18:03,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-11-11 21:18:03,009 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:18:03,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:18:03,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1979297969, now seen corresponding path program 12 times [2020-11-11 21:18:03,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:18:03,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067533856] [2020-11-11 21:18:03,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:18:03,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:18:03,085 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 21:18:03,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067533856] [2020-11-11 21:18:03,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822360550] [2020-11-11 21:18:03,086 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 21:18:03,145 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-11-11 21:18:03,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:18:03,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-11 21:18:03,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:18:03,279 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:18:06,522 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 20 [2020-11-11 21:18:06,524 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 21:18:06,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:18:06,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-11-11 21:18:06,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296916395] [2020-11-11 21:18:06,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-11 21:18:06,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:18:06,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-11 21:18:06,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=138, Unknown=1, NotChecked=0, Total=182 [2020-11-11 21:18:06,527 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 21:18:08,752 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 27 [2020-11-11 21:18:12,925 WARN L193 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 43 DAG size of output: 32 [2020-11-11 21:18:15,035 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 25 [2020-11-11 21:18:25,281 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 27 DAG size of output: 26 [2020-11-11 21:18:35,420 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2020-11-11 21:18:43,666 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 29 [2020-11-11 21:19:29,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:19:29,675 INFO L93 Difference]: Finished difference Result 189 states and 446 transitions. [2020-11-11 21:19:29,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-11 21:19:29,675 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 21:19:29,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:19:29,677 INFO L225 Difference]: With dead ends: 189 [2020-11-11 21:19:29,678 INFO L226 Difference]: Without dead ends: 184 [2020-11-11 21:19:29,678 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 37.6s TimeCoverageRelationStatistics Valid=277, Invalid=705, Unknown=10, NotChecked=0, Total=992 [2020-11-11 21:19:29,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-11-11 21:19:29,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 121. [2020-11-11 21:19:29,683 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 21:19:29,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 303 transitions. [2020-11-11 21:19:29,684 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 303 transitions. Word has length 12 [2020-11-11 21:19:29,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:19:29,684 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 303 transitions. [2020-11-11 21:19:29,684 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 21:19:29,685 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 303 transitions. [2020-11-11 21:19:29,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-11 21:19:29,685 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:19:29,685 INFO L494 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:19:29,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:19:29,899 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:19:29,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:19:29,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1571312207, now seen corresponding path program 13 times [2020-11-11 21:19:29,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:19:29,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537964262] [2020-11-11 21:19:29,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:19:29,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:19:29,973 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 21:19:29,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537964262] [2020-11-11 21:19:29,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205812953] [2020-11-11 21:19:29,974 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 21:19:30,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:19:30,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-11 21:19:30,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:19:30,132 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 21:19:30,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:19:30,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-11-11 21:19:30,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016599928] [2020-11-11 21:19:30,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 21:19:30,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:19:30,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 21:19:30,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-11-11 21:19:30,134 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 21:19:30,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:19:30,318 INFO L93 Difference]: Finished difference Result 156 states and 371 transitions. [2020-11-11 21:19:30,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-11 21:19:30,321 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 21:19:30,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:19:30,322 INFO L225 Difference]: With dead ends: 156 [2020-11-11 21:19:30,323 INFO L226 Difference]: Without dead ends: 154 [2020-11-11 21:19:30,323 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2020-11-11 21:19:30,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-11-11 21:19:30,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 124. [2020-11-11 21:19:30,328 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 21:19:30,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 310 transitions. [2020-11-11 21:19:30,329 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 310 transitions. Word has length 12 [2020-11-11 21:19:30,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:19:30,329 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 310 transitions. [2020-11-11 21:19:30,329 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 21:19:30,329 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 310 transitions. [2020-11-11 21:19:30,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-11 21:19:30,330 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:19:30,330 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:19:30,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-11-11 21:19:30,531 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:19:30,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:19:30,532 INFO L82 PathProgramCache]: Analyzing trace with hash 2037689506, now seen corresponding path program 14 times [2020-11-11 21:19:30,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:19:30,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641013613] [2020-11-11 21:19:30,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:19:30,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:19:30,626 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 21:19:30,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641013613] [2020-11-11 21:19:30,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011774148] [2020-11-11 21:19:30,626 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 21:19:30,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:19:30,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:19:30,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-11 21:19:30,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:19:30,796 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:19:30,838 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 21:19:30,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:19:30,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-11-11 21:19:30,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836833114] [2020-11-11 21:19:30,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 21:19:30,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:19:30,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 21:19:30,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-11-11 21:19:30,840 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 21:19:31,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:19:31,405 INFO L93 Difference]: Finished difference Result 206 states and 484 transitions. [2020-11-11 21:19:31,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-11 21:19:31,406 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 21:19:31,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:19:31,407 INFO L225 Difference]: With dead ends: 206 [2020-11-11 21:19:31,407 INFO L226 Difference]: Without dead ends: 198 [2020-11-11 21:19:31,408 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=233, Invalid=637, Unknown=0, NotChecked=0, Total=870 [2020-11-11 21:19:31,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-11-11 21:19:31,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 126. [2020-11-11 21:19:31,415 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 21:19:31,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 314 transitions. [2020-11-11 21:19:31,417 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 314 transitions. Word has length 12 [2020-11-11 21:19:31,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:19:31,417 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 314 transitions. [2020-11-11 21:19:31,417 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 21:19:31,417 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 314 transitions. [2020-11-11 21:19:31,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-11 21:19:31,420 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:19:31,421 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:19:31,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-11-11 21:19:31,632 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:19:31,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:19:31,632 INFO L82 PathProgramCache]: Analyzing trace with hash 2037718336, now seen corresponding path program 15 times [2020-11-11 21:19:31,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:19:31,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761305048] [2020-11-11 21:19:31,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:19:31,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:19:31,708 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 21:19:31,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761305048] [2020-11-11 21:19:31,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245325215] [2020-11-11 21:19:31,709 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 21:19:31,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-11 21:19:31,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:19:31,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-11 21:19:31,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:19:31,855 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:19:31,869 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 21:19:31,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:19:31,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-11-11 21:19:31,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981837387] [2020-11-11 21:19:31,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 21:19:31,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:19:31,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 21:19:31,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-11-11 21:19:31,871 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 21:19:32,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:19:32,370 INFO L93 Difference]: Finished difference Result 212 states and 497 transitions. [2020-11-11 21:19:32,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-11 21:19:32,371 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 21:19:32,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:19:32,372 INFO L225 Difference]: With dead ends: 212 [2020-11-11 21:19:32,372 INFO L226 Difference]: Without dead ends: 204 [2020-11-11 21:19:32,373 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=242, Invalid=628, Unknown=0, NotChecked=0, Total=870 [2020-11-11 21:19:32,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-11-11 21:19:32,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 128. [2020-11-11 21:19:32,378 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 21:19:32,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 324 transitions. [2020-11-11 21:19:32,379 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 324 transitions. Word has length 12 [2020-11-11 21:19:32,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:19:32,379 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 324 transitions. [2020-11-11 21:19:32,379 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 21:19:32,379 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 324 transitions. [2020-11-11 21:19:32,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-11 21:19:32,380 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:19:32,380 INFO L494 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:19:32,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-11-11 21:19:32,592 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:19:32,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:19:32,592 INFO L82 PathProgramCache]: Analyzing trace with hash 2037719297, now seen corresponding path program 16 times [2020-11-11 21:19:32,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:19:32,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710103897] [2020-11-11 21:19:32,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:19:32,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:19:32,665 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 21:19:32,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710103897] [2020-11-11 21:19:32,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984306097] [2020-11-11 21:19:32,666 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 21:19:32,710 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 21:19:32,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:19:32,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-11 21:19:32,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:19:32,795 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:19:32,816 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 21:19:32,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:19:32,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-11-11 21:19:32,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020773334] [2020-11-11 21:19:32,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 21:19:32,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:19:32,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 21:19:32,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-11-11 21:19:32,818 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 21:19:33,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:19:33,377 INFO L93 Difference]: Finished difference Result 212 states and 495 transitions. [2020-11-11 21:19:33,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 21:19:33,379 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 21:19:33,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:19:33,381 INFO L225 Difference]: With dead ends: 212 [2020-11-11 21:19:33,381 INFO L226 Difference]: Without dead ends: 204 [2020-11-11 21:19:33,382 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=288, Invalid=768, Unknown=0, NotChecked=0, Total=1056 [2020-11-11 21:19:33,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-11-11 21:19:33,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 127. [2020-11-11 21:19:33,387 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 21:19:33,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 316 transitions. [2020-11-11 21:19:33,388 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 316 transitions. Word has length 12 [2020-11-11 21:19:33,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:19:33,388 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 316 transitions. [2020-11-11 21:19:33,388 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 21:19:33,389 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 316 transitions. [2020-11-11 21:19:33,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-11 21:19:33,389 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:19:33,389 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:19:33,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-11-11 21:19:33,604 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:19:33,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:19:33,605 INFO L82 PathProgramCache]: Analyzing trace with hash 437459916, now seen corresponding path program 17 times [2020-11-11 21:19:33,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:19:33,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039539074] [2020-11-11 21:19:33,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:19:33,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:19:33,712 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 21:19:33,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039539074] [2020-11-11 21:19:33,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924851724] [2020-11-11 21:19:33,712 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 21:19:33,764 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:19:33,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:19:33,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-11 21:19:33,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:19:33,875 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 21:19:33,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:19:33,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-11-11 21:19:33,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35369382] [2020-11-11 21:19:33,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 21:19:33,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:19:33,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 21:19:33,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-11-11 21:19:33,877 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 21:19:34,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:19:34,047 INFO L93 Difference]: Finished difference Result 162 states and 386 transitions. [2020-11-11 21:19:34,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-11 21:19:34,047 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 21:19:34,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:19:34,048 INFO L225 Difference]: With dead ends: 162 [2020-11-11 21:19:34,048 INFO L226 Difference]: Without dead ends: 160 [2020-11-11 21:19:34,049 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 21:19:34,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-11-11 21:19:34,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 129. [2020-11-11 21:19:34,052 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 21:19:34,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 322 transitions. [2020-11-11 21:19:34,053 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 322 transitions. Word has length 12 [2020-11-11 21:19:34,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:19:34,053 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 322 transitions. [2020-11-11 21:19:34,054 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 21:19:34,054 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 322 transitions. [2020-11-11 21:19:34,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-11 21:19:34,054 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:19:34,054 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:19:34,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-11-11 21:19:34,265 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:19:34,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:19:34,265 INFO L82 PathProgramCache]: Analyzing trace with hash 2011173168, now seen corresponding path program 18 times [2020-11-11 21:19:34,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:19:34,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083163319] [2020-11-11 21:19:34,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:19:34,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:19:34,338 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 21:19:34,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083163319] [2020-11-11 21:19:34,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444904344] [2020-11-11 21:19:34,339 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 21:19:34,395 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-11-11 21:19:34,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:19:34,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-11 21:19:34,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:19:34,482 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:19:34,495 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 21:19:34,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:19:34,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-11-11 21:19:34,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006895477] [2020-11-11 21:19:34,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 21:19:34,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:19:34,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 21:19:34,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-11-11 21:19:34,497 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 21:19:35,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:19:35,058 INFO L93 Difference]: Finished difference Result 178 states and 422 transitions. [2020-11-11 21:19:35,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-11 21:19:35,059 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 21:19:35,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:19:35,060 INFO L225 Difference]: With dead ends: 178 [2020-11-11 21:19:35,060 INFO L226 Difference]: Without dead ends: 173 [2020-11-11 21:19:35,061 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=242, Invalid=628, Unknown=0, NotChecked=0, Total=870 [2020-11-11 21:19:35,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-11-11 21:19:35,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 125. [2020-11-11 21:19:35,065 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 21:19:35,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 306 transitions. [2020-11-11 21:19:35,066 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 306 transitions. Word has length 12 [2020-11-11 21:19:35,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:19:35,066 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 306 transitions. [2020-11-11 21:19:35,066 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 21:19:35,066 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 306 transitions. [2020-11-11 21:19:35,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-11 21:19:35,067 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:19:35,067 INFO L494 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:19:35,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:19:35,278 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:19:35,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:19:35,278 INFO L82 PathProgramCache]: Analyzing trace with hash -2077773447, now seen corresponding path program 5 times [2020-11-11 21:19:35,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:19:35,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668278909] [2020-11-11 21:19:35,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:19:35,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:19:35,363 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 21:19:35,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668278909] [2020-11-11 21:19:35,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405414383] [2020-11-11 21:19:35,364 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 21:19:35,406 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-11 21:19:35,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:19:35,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:19:35,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:19:35,516 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:19:35,531 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 21:19:35,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:19:35,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:19:35,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105830356] [2020-11-11 21:19:35,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:19:35,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:19:35,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:19:35,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:19:35,533 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 21:19:35,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:19:35,870 INFO L93 Difference]: Finished difference Result 173 states and 412 transitions. [2020-11-11 21:19:35,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-11 21:19:35,871 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 21:19:35,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:19:35,873 INFO L225 Difference]: With dead ends: 173 [2020-11-11 21:19:35,873 INFO L226 Difference]: Without dead ends: 168 [2020-11-11 21:19:35,873 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=198, Invalid=452, Unknown=0, NotChecked=0, Total=650 [2020-11-11 21:19:35,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-11-11 21:19:35,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 132. [2020-11-11 21:19:35,878 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 21:19:35,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 332 transitions. [2020-11-11 21:19:35,879 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 332 transitions. Word has length 12 [2020-11-11 21:19:35,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:19:35,879 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 332 transitions. [2020-11-11 21:19:35,879 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 21:19:35,880 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 332 transitions. [2020-11-11 21:19:35,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:19:35,880 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:19:35,880 INFO L494 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:19:36,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-11-11 21:19:36,082 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:19:36,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:19:36,082 INFO L82 PathProgramCache]: Analyzing trace with hash -941455571, now seen corresponding path program 6 times [2020-11-11 21:19:36,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:19:36,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727347610] [2020-11-11 21:19:36,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:19:36,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:19:36,184 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 21:19:36,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727347610] [2020-11-11 21:19:36,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649963799] [2020-11-11 21:19:36,185 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 21:19:36,247 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-11 21:19:36,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:19:36,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:19:36,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:19:36,390 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:19:36,413 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 21:19:36,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:19:36,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:19:36,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325059148] [2020-11-11 21:19:36,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:19:36,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:19:36,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:19:36,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:19:36,415 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 21:19:36,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:19:36,835 INFO L93 Difference]: Finished difference Result 181 states and 431 transitions. [2020-11-11 21:19:36,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-11 21:19:36,836 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 21:19:36,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:19:36,837 INFO L225 Difference]: With dead ends: 181 [2020-11-11 21:19:36,837 INFO L226 Difference]: Without dead ends: 175 [2020-11-11 21:19:36,838 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=259, Invalid=611, Unknown=0, NotChecked=0, Total=870 [2020-11-11 21:19:36,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-11-11 21:19:36,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 138. [2020-11-11 21:19:36,845 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 21:19:36,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 349 transitions. [2020-11-11 21:19:36,846 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 349 transitions. Word has length 13 [2020-11-11 21:19:36,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:19:36,846 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 349 transitions. [2020-11-11 21:19:36,846 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 21:19:36,847 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 349 transitions. [2020-11-11 21:19:36,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:19:36,847 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:19:36,847 INFO L494 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:19:37,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:19:37,048 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:19:37,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:19:37,048 INFO L82 PathProgramCache]: Analyzing trace with hash -941754442, now seen corresponding path program 19 times [2020-11-11 21:19:37,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:19:37,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877251677] [2020-11-11 21:19:37,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:19:37,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:19:37,161 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 21:19:37,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877251677] [2020-11-11 21:19:37,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963207726] [2020-11-11 21:19:37,162 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 21:19:37,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:19:37,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:19:37,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:19:37,334 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:19:37,352 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 21:19:37,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:19:37,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:19:37,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923848323] [2020-11-11 21:19:37,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:19:37,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:19:37,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:19:37,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:19:37,354 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 21:19:38,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:19:38,022 INFO L93 Difference]: Finished difference Result 191 states and 459 transitions. [2020-11-11 21:19:38,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-11 21:19:38,023 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 21:19:38,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:19:38,025 INFO L225 Difference]: With dead ends: 191 [2020-11-11 21:19:38,025 INFO L226 Difference]: Without dead ends: 186 [2020-11-11 21:19:38,026 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=305, Invalid=751, Unknown=0, NotChecked=0, Total=1056 [2020-11-11 21:19:38,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-11-11 21:19:38,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 138. [2020-11-11 21:19:38,030 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 21:19:38,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 349 transitions. [2020-11-11 21:19:38,031 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 349 transitions. Word has length 13 [2020-11-11 21:19:38,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:19:38,032 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 349 transitions. [2020-11-11 21:19:38,032 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 21:19:38,032 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 349 transitions. [2020-11-11 21:19:38,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:19:38,032 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:19:38,033 INFO L494 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:19:38,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-11-11 21:19:38,247 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:19:38,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:19:38,248 INFO L82 PathProgramCache]: Analyzing trace with hash -965765182, now seen corresponding path program 20 times [2020-11-11 21:19:38,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:19:38,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709925215] [2020-11-11 21:19:38,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:19:38,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:19:38,373 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 21:19:38,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709925215] [2020-11-11 21:19:38,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613535000] [2020-11-11 21:19:38,373 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 21:19:38,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:19:38,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:19:38,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:19:38,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:19:38,598 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 21:19:38,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:19:38,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:19:38,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734210098] [2020-11-11 21:19:38,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:19:38,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:19:38,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:19:38,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:19:38,600 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 21:19:38,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:19:38,855 INFO L93 Difference]: Finished difference Result 175 states and 419 transitions. [2020-11-11 21:19:38,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-11 21:19:38,856 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 21:19:38,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:19:38,858 INFO L225 Difference]: With dead ends: 175 [2020-11-11 21:19:38,858 INFO L226 Difference]: Without dead ends: 173 [2020-11-11 21:19:38,859 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=374, Unknown=0, NotChecked=0, Total=506 [2020-11-11 21:19:38,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-11-11 21:19:38,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 138. [2020-11-11 21:19:38,863 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 21:19:38,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 349 transitions. [2020-11-11 21:19:38,864 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 349 transitions. Word has length 13 [2020-11-11 21:19:38,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:19:38,864 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 349 transitions. [2020-11-11 21:19:38,864 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 21:19:38,864 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 349 transitions. [2020-11-11 21:19:38,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:19:38,865 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:19:38,865 INFO L494 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:19:39,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:19:39,079 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:19:39,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:19:39,079 INFO L82 PathProgramCache]: Analyzing trace with hash -950721533, now seen corresponding path program 21 times [2020-11-11 21:19:39,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:19:39,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74340420] [2020-11-11 21:19:39,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:19:39,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:19:39,182 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 21:19:39,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74340420] [2020-11-11 21:19:39,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627052284] [2020-11-11 21:19:39,183 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 21:19:39,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-11 21:19:39,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:19:39,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:19:39,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:19:39,368 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:19:39,386 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 21:19:39,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:19:39,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:19:39,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305664910] [2020-11-11 21:19:39,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:19:39,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:19:39,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:19:39,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:19:39,387 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 21:19:40,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:19:40,240 INFO L93 Difference]: Finished difference Result 204 states and 492 transitions. [2020-11-11 21:19:40,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 21:19:40,240 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 21:19:40,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:19:40,242 INFO L225 Difference]: With dead ends: 204 [2020-11-11 21:19:40,242 INFO L226 Difference]: Without dead ends: 199 [2020-11-11 21:19:40,243 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=389, Invalid=943, Unknown=0, NotChecked=0, Total=1332 [2020-11-11 21:19:40,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-11-11 21:19:40,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 138. [2020-11-11 21:19:40,248 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 21:19:40,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 349 transitions. [2020-11-11 21:19:40,248 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 349 transitions. Word has length 13 [2020-11-11 21:19:40,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:19:40,249 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 349 transitions. [2020-11-11 21:19:40,249 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 21:19:40,249 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 349 transitions. [2020-11-11 21:19:40,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:19:40,250 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:19:40,250 INFO L494 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:19:40,462 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-11-11 21:19:40,463 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:19:40,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:19:40,463 INFO L82 PathProgramCache]: Analyzing trace with hash -950720572, now seen corresponding path program 22 times [2020-11-11 21:19:40,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:19:40,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011703351] [2020-11-11 21:19:40,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:19:40,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:19:40,559 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 21:19:40,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011703351] [2020-11-11 21:19:40,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532739305] [2020-11-11 21:19:40,560 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 21:19:40,606 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 21:19:40,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:19:40,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:19:40,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:19:40,780 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:19:43,896 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 20 [2020-11-11 21:19:43,898 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 21:19:43,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:19:43,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-11-11 21:19:43,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174089033] [2020-11-11 21:19:43,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-11 21:19:43,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:19:43,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-11 21:19:43,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=185, Unknown=1, NotChecked=0, Total=240 [2020-11-11 21:19:43,899 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 21:19:47,362 WARN L193 SmtUtils]: Spent 3.25 s on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2020-11-11 21:19:49,499 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 29 [2020-11-11 21:20:05,529 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 25 [2020-11-11 21:20:38,452 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 27 DAG size of output: 26 [2020-11-11 21:21:00,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:00,236 INFO L93 Difference]: Finished difference Result 223 states and 532 transitions. [2020-11-11 21:21:00,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-11 21:21:00,242 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 21:21:00,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:00,243 INFO L225 Difference]: With dead ends: 223 [2020-11-11 21:21:00,243 INFO L226 Difference]: Without dead ends: 218 [2020-11-11 21:21:00,244 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 32.5s TimeCoverageRelationStatistics Valid=401, Invalid=1072, Unknown=9, NotChecked=0, Total=1482 [2020-11-11 21:21:00,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-11-11 21:21:00,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 138. [2020-11-11 21:21:00,249 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 21:21:00,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 349 transitions. [2020-11-11 21:21:00,250 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 349 transitions. Word has length 13 [2020-11-11 21:21:00,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:00,250 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 349 transitions. [2020-11-11 21:21:00,250 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 21:21:00,250 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 349 transitions. [2020-11-11 21:21:00,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:21:00,251 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:00,251 INFO L494 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:00,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:21:00,463 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:00,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:00,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1695078653, now seen corresponding path program 23 times [2020-11-11 21:21:00,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:00,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215914708] [2020-11-11 21:21:00,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:00,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:00,569 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 21:21:00,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215914708] [2020-11-11 21:21:00,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449328346] [2020-11-11 21:21:00,570 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 21:21:00,619 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-11 21:21:00,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:21:00,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:21:00,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:00,817 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 21:21:00,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:00,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:21:00,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853859103] [2020-11-11 21:21:00,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:21:00,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:00,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:21:00,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:21:00,819 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 21:21:01,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:01,100 INFO L93 Difference]: Finished difference Result 181 states and 432 transitions. [2020-11-11 21:21:01,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-11 21:21:01,101 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 21:21:01,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:01,102 INFO L225 Difference]: With dead ends: 181 [2020-11-11 21:21:01,102 INFO L226 Difference]: Without dead ends: 179 [2020-11-11 21:21:01,103 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 21:21:01,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-11-11 21:21:01,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 140. [2020-11-11 21:21:01,107 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 21:21:01,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 355 transitions. [2020-11-11 21:21:01,108 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 355 transitions. Word has length 13 [2020-11-11 21:21:01,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:01,108 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 355 transitions. [2020-11-11 21:21:01,108 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 21:21:01,108 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 355 transitions. [2020-11-11 21:21:01,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:21:01,109 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:01,109 INFO L494 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:01,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-11-11 21:21:01,310 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:01,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:01,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1695077692, now seen corresponding path program 24 times [2020-11-11 21:21:01,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:01,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847431142] [2020-11-11 21:21:01,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:01,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:01,405 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 21:21:01,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847431142] [2020-11-11 21:21:01,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678315007] [2020-11-11 21:21:01,405 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 21:21:01,480 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-11 21:21:01,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:21:01,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:21:01,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:01,695 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 21:21:01,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:01,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:21:01,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992923661] [2020-11-11 21:21:01,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:21:01,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:01,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:21:01,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:21:01,697 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 21:21:01,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:01,996 INFO L93 Difference]: Finished difference Result 181 states and 433 transitions. [2020-11-11 21:21:01,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-11 21:21:01,997 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 21:21:01,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:01,999 INFO L225 Difference]: With dead ends: 181 [2020-11-11 21:21:01,999 INFO L226 Difference]: Without dead ends: 179 [2020-11-11 21:21:02,000 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 21:21:02,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-11-11 21:21:02,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 140. [2020-11-11 21:21:02,004 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 21:21:02,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 355 transitions. [2020-11-11 21:21:02,005 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 355 transitions. Word has length 13 [2020-11-11 21:21:02,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:02,005 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 355 transitions. [2020-11-11 21:21:02,005 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 21:21:02,005 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 355 transitions. [2020-11-11 21:21:02,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:21:02,006 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:02,006 INFO L494 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:02,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:21:02,218 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:02,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:02,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1228701354, now seen corresponding path program 25 times [2020-11-11 21:21:02,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:02,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113861635] [2020-11-11 21:21:02,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:02,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:02,314 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 21:21:02,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113861635] [2020-11-11 21:21:02,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506953546] [2020-11-11 21:21:02,315 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 21:21:02,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:02,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:21:02,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:02,526 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:21:02,548 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 21:21:02,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:02,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:21:02,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255860525] [2020-11-11 21:21:02,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:21:02,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:02,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:21:02,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:21:02,551 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 21:21:03,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:03,320 INFO L93 Difference]: Finished difference Result 216 states and 517 transitions. [2020-11-11 21:21:03,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-11 21:21:03,321 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 21:21:03,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:03,323 INFO L225 Difference]: With dead ends: 216 [2020-11-11 21:21:03,323 INFO L226 Difference]: Without dead ends: 208 [2020-11-11 21:21:03,323 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 21:21:03,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-11-11 21:21:03,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 141. [2020-11-11 21:21:03,331 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 21:21:03,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 356 transitions. [2020-11-11 21:21:03,331 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 356 transitions. Word has length 13 [2020-11-11 21:21:03,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:03,331 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 356 transitions. [2020-11-11 21:21:03,331 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 21:21:03,332 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 356 transitions. [2020-11-11 21:21:03,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:21:03,332 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:03,332 INFO L494 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:03,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-11-11 21:21:03,533 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:03,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:03,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1228700393, now seen corresponding path program 26 times [2020-11-11 21:21:03,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:03,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054850895] [2020-11-11 21:21:03,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:03,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:03,632 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 21:21:03,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054850895] [2020-11-11 21:21:03,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287712808] [2020-11-11 21:21:03,633 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 21:21:03,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:21:03,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:21:03,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:21:03,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:03,893 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:21:04,062 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 21:21:04,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:04,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:21:04,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066038193] [2020-11-11 21:21:04,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:21:04,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:04,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:21:04,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:21:04,063 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 21:21:04,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:04,988 INFO L93 Difference]: Finished difference Result 236 states and 571 transitions. [2020-11-11 21:21:04,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 21:21:04,989 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 21:21:04,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:04,991 INFO L225 Difference]: With dead ends: 236 [2020-11-11 21:21:04,991 INFO L226 Difference]: Without dead ends: 228 [2020-11-11 21:21:04,992 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=300, Invalid=822, Unknown=0, NotChecked=0, Total=1122 [2020-11-11 21:21:04,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-11-11 21:21:04,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 143. [2020-11-11 21:21:04,997 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 21:21:04,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 366 transitions. [2020-11-11 21:21:04,997 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 366 transitions. Word has length 13 [2020-11-11 21:21:04,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:04,998 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 366 transitions. [2020-11-11 21:21:04,998 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 21:21:04,998 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 366 transitions. [2020-11-11 21:21:04,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:21:04,999 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:04,999 INFO L494 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:05,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-11-11 21:21:05,212 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:05,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:05,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1228671563, now seen corresponding path program 27 times [2020-11-11 21:21:05,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:05,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806319380] [2020-11-11 21:21:05,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:05,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:05,315 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 21:21:05,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806319380] [2020-11-11 21:21:05,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463192012] [2020-11-11 21:21:05,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:21:05,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-11 21:21:05,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:21:05,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:21:05,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:05,583 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:21:05,629 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 21:21:05,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:05,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:21:05,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941384900] [2020-11-11 21:21:05,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:21:05,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:05,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:21:05,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:21:05,631 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 21:21:06,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:06,537 INFO L93 Difference]: Finished difference Result 218 states and 528 transitions. [2020-11-11 21:21:06,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 21:21:06,538 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 21:21:06,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:06,539 INFO L225 Difference]: With dead ends: 218 [2020-11-11 21:21:06,539 INFO L226 Difference]: Without dead ends: 213 [2020-11-11 21:21:06,542 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 21:21:06,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-11-11 21:21:06,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 144. [2020-11-11 21:21:06,547 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 21:21:06,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 371 transitions. [2020-11-11 21:21:06,548 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 371 transitions. Word has length 13 [2020-11-11 21:21:06,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:06,548 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 371 transitions. [2020-11-11 21:21:06,548 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 21:21:06,548 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 371 transitions. [2020-11-11 21:21:06,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:21:06,549 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:06,549 INFO L494 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:06,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-11-11 21:21:06,762 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:06,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:06,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1228670602, now seen corresponding path program 28 times [2020-11-11 21:21:06,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:06,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417049047] [2020-11-11 21:21:06,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:06,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:06,875 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 21:21:06,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417049047] [2020-11-11 21:21:06,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653514970] [2020-11-11 21:21:06,876 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 21:21:06,930 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 21:21:06,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:21:06,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:21:06,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:07,117 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:21:07,177 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 21:21:07,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:07,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:21:07,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710983372] [2020-11-11 21:21:07,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:21:07,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:07,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:21:07,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:21:07,180 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 21:21:08,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:08,040 INFO L93 Difference]: Finished difference Result 216 states and 525 transitions. [2020-11-11 21:21:08,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 21:21:08,041 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 21:21:08,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:08,042 INFO L225 Difference]: With dead ends: 216 [2020-11-11 21:21:08,042 INFO L226 Difference]: Without dead ends: 211 [2020-11-11 21:21:08,043 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2020-11-11 21:21:08,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-11-11 21:21:08,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 143. [2020-11-11 21:21:08,048 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 21:21:08,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 366 transitions. [2020-11-11 21:21:08,049 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 366 transitions. Word has length 13 [2020-11-11 21:21:08,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:08,049 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 366 transitions. [2020-11-11 21:21:08,049 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 21:21:08,049 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 366 transitions. [2020-11-11 21:21:08,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:21:08,050 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:08,050 INFO L494 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:08,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-11-11 21:21:08,263 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:08,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:08,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1466008483, now seen corresponding path program 29 times [2020-11-11 21:21:08,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:08,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950560024] [2020-11-11 21:21:08,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:08,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:08,358 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 21:21:08,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950560024] [2020-11-11 21:21:08,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932740870] [2020-11-11 21:21:08,359 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 21:21:08,405 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-11 21:21:08,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:21:08,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:21:08,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:08,600 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 21:21:08,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:08,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:21:08,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158046964] [2020-11-11 21:21:08,601 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:21:08,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:08,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:21:08,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:21:08,602 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 21:21:08,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:08,926 INFO L93 Difference]: Finished difference Result 191 states and 461 transitions. [2020-11-11 21:21:08,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-11 21:21:08,927 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 21:21:08,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:08,929 INFO L225 Difference]: With dead ends: 191 [2020-11-11 21:21:08,929 INFO L226 Difference]: Without dead ends: 189 [2020-11-11 21:21:08,930 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 21:21:08,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-11-11 21:21:08,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 149. [2020-11-11 21:21:08,935 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 21:21:08,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 384 transitions. [2020-11-11 21:21:08,936 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 384 transitions. Word has length 13 [2020-11-11 21:21:08,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:08,936 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 384 transitions. [2020-11-11 21:21:08,936 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 21:21:08,936 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 384 transitions. [2020-11-11 21:21:08,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:21:08,939 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:08,939 INFO L494 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:09,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:21:09,150 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:09,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:09,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1466037313, now seen corresponding path program 30 times [2020-11-11 21:21:09,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:09,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392971767] [2020-11-11 21:21:09,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:09,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:09,250 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 21:21:09,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392971767] [2020-11-11 21:21:09,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073163926] [2020-11-11 21:21:09,251 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 21:21:09,300 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-11 21:21:09,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:21:09,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:21:09,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:09,478 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 21:21:09,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:09,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:21:09,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567445378] [2020-11-11 21:21:09,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:21:09,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:09,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:21:09,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:21:09,480 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 21:21:09,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:09,764 INFO L93 Difference]: Finished difference Result 195 states and 469 transitions. [2020-11-11 21:21:09,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-11 21:21:09,765 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 21:21:09,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:09,767 INFO L225 Difference]: With dead ends: 195 [2020-11-11 21:21:09,767 INFO L226 Difference]: Without dead ends: 193 [2020-11-11 21:21:09,768 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 21:21:09,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-11-11 21:21:09,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 149. [2020-11-11 21:21:09,772 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 21:21:09,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 384 transitions. [2020-11-11 21:21:09,773 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 384 transitions. Word has length 13 [2020-11-11 21:21:09,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:09,773 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 384 transitions. [2020-11-11 21:21:09,773 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 21:21:09,774 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 384 transitions. [2020-11-11 21:21:09,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:21:09,777 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:09,777 INFO L494 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:09,988 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-11-11 21:21:09,989 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:09,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:09,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1256111422, now seen corresponding path program 31 times [2020-11-11 21:21:09,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:09,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726039960] [2020-11-11 21:21:09,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:09,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:10,099 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 21:21:10,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726039960] [2020-11-11 21:21:10,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155235484] [2020-11-11 21:21:10,100 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 21:21:10,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:10,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:21:10,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:10,313 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:21:10,365 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 21:21:10,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:10,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:21:10,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919520025] [2020-11-11 21:21:10,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:21:10,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:10,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:21:10,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:21:10,367 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 21:21:11,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:11,381 INFO L93 Difference]: Finished difference Result 258 states and 616 transitions. [2020-11-11 21:21:11,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-11 21:21:11,382 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 21:21:11,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:11,383 INFO L225 Difference]: With dead ends: 258 [2020-11-11 21:21:11,383 INFO L226 Difference]: Without dead ends: 250 [2020-11-11 21:21:11,383 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=374, Invalid=1032, Unknown=0, NotChecked=0, Total=1406 [2020-11-11 21:21:11,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-11-11 21:21:11,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 149. [2020-11-11 21:21:11,388 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 21:21:11,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 384 transitions. [2020-11-11 21:21:11,389 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 384 transitions. Word has length 13 [2020-11-11 21:21:11,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:11,389 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 384 transitions. [2020-11-11 21:21:11,390 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 21:21:11,390 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 384 transitions. [2020-11-11 21:21:11,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:21:11,390 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:11,390 INFO L494 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:11,602 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-11-11 21:21:11,602 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:11,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:11,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1256110461, now seen corresponding path program 32 times [2020-11-11 21:21:11,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:11,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440356334] [2020-11-11 21:21:11,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:11,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:11,700 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 21:21:11,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440356334] [2020-11-11 21:21:11,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005529978] [2020-11-11 21:21:11,701 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 21:21:11,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:21:11,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:21:11,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:21:11,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:11,917 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:21:11,969 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:11,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:11,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:21:11,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045597249] [2020-11-11 21:21:11,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:21:11,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:11,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:21:11,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:21:11,971 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 21:21:13,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:13,039 INFO L93 Difference]: Finished difference Result 250 states and 601 transitions. [2020-11-11 21:21:13,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-11 21:21:13,048 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 21:21:13,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:13,049 INFO L225 Difference]: With dead ends: 250 [2020-11-11 21:21:13,050 INFO L226 Difference]: Without dead ends: 242 [2020-11-11 21:21:13,051 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=425, Invalid=1215, Unknown=0, NotChecked=0, Total=1640 [2020-11-11 21:21:13,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-11-11 21:21:13,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 145. [2020-11-11 21:21:13,055 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 21:21:13,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 377 transitions. [2020-11-11 21:21:13,056 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 377 transitions. Word has length 13 [2020-11-11 21:21:13,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:13,056 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 377 transitions. [2020-11-11 21:21:13,056 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 21:21:13,056 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 377 transitions. [2020-11-11 21:21:13,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:21:13,057 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:13,057 INFO L494 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:13,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:21:13,260 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:13,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:13,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1255217692, now seen corresponding path program 33 times [2020-11-11 21:21:13,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:13,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535836745] [2020-11-11 21:21:13,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:13,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:13,356 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 21:21:13,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535836745] [2020-11-11 21:21:13,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084008757] [2020-11-11 21:21:13,356 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 21:21:13,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-11 21:21:13,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:21:13,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:21:13,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:13,556 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:21:13,572 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 21:21:13,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:13,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:21:13,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13871381] [2020-11-11 21:21:13,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:21:13,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:13,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:21:13,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:21:13,574 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 21:21:14,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:14,507 INFO L93 Difference]: Finished difference Result 262 states and 632 transitions. [2020-11-11 21:21:14,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-11 21:21:14,508 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 21:21:14,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:14,510 INFO L225 Difference]: With dead ends: 262 [2020-11-11 21:21:14,511 INFO L226 Difference]: Without dead ends: 254 [2020-11-11 21:21:14,511 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=423, Invalid=1217, Unknown=0, NotChecked=0, Total=1640 [2020-11-11 21:21:14,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-11-11 21:21:14,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 148. [2020-11-11 21:21:14,516 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 21:21:14,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 392 transitions. [2020-11-11 21:21:14,517 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 392 transitions. Word has length 13 [2020-11-11 21:21:14,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:14,517 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 392 transitions. [2020-11-11 21:21:14,517 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 21:21:14,517 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 392 transitions. [2020-11-11 21:21:14,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:21:14,518 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:14,518 INFO L494 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:14,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-11-11 21:21:14,733 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:14,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:14,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1255216731, now seen corresponding path program 34 times [2020-11-11 21:21:14,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:14,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127975868] [2020-11-11 21:21:14,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:14,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:14,837 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 21:21:14,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127975868] [2020-11-11 21:21:14,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594919092] [2020-11-11 21:21:14,838 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 21:21:14,883 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 21:21:14,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:21:14,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:21:14,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:15,021 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:21:15,038 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 21:21:15,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:15,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:21:15,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378900858] [2020-11-11 21:21:15,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:21:15,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:15,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:21:15,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:21:15,040 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 21:21:15,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:15,853 INFO L93 Difference]: Finished difference Result 256 states and 629 transitions. [2020-11-11 21:21:15,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-11 21:21:15,854 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 21:21:15,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:15,856 INFO L225 Difference]: With dead ends: 256 [2020-11-11 21:21:15,856 INFO L226 Difference]: Without dead ends: 248 [2020-11-11 21:21:15,857 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 21:21:15,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-11-11 21:21:15,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 143. [2020-11-11 21:21:15,865 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 21:21:15,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 377 transitions. [2020-11-11 21:21:15,865 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 377 transitions. Word has length 13 [2020-11-11 21:21:15,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:15,866 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 377 transitions. [2020-11-11 21:21:15,866 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 21:21:15,866 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 377 transitions. [2020-11-11 21:21:15,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:21:15,867 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:15,867 INFO L494 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:16,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:21:16,080 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:16,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:16,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1255187901, now seen corresponding path program 35 times [2020-11-11 21:21:16,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:16,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62973115] [2020-11-11 21:21:16,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:16,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:16,176 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 21:21:16,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62973115] [2020-11-11 21:21:16,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520972740] [2020-11-11 21:21:16,176 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 21:21:16,241 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:21:16,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:21:16,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:21:16,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:16,386 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:21:16,407 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 21:21:16,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:16,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:21:16,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473300686] [2020-11-11 21:21:16,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:21:16,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:16,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:21:16,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:21:16,409 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 21:21:17,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:17,414 INFO L93 Difference]: Finished difference Result 234 states and 568 transitions. [2020-11-11 21:21:17,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-11 21:21:17,415 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 21:21:17,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:17,417 INFO L225 Difference]: With dead ends: 234 [2020-11-11 21:21:17,417 INFO L226 Difference]: Without dead ends: 226 [2020-11-11 21:21:17,418 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=399, Invalid=1161, Unknown=0, NotChecked=0, Total=1560 [2020-11-11 21:21:17,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-11-11 21:21:17,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 143. [2020-11-11 21:21:17,423 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 21:21:17,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 377 transitions. [2020-11-11 21:21:17,424 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 377 transitions. Word has length 13 [2020-11-11 21:21:17,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:17,425 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 377 transitions. [2020-11-11 21:21:17,425 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 21:21:17,425 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 377 transitions. [2020-11-11 21:21:17,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:21:17,426 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:17,426 INFO L494 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:17,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-11-11 21:21:17,627 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:17,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:17,627 INFO L82 PathProgramCache]: Analyzing trace with hash 675431139, now seen corresponding path program 36 times [2020-11-11 21:21:17,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:17,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928401027] [2020-11-11 21:21:17,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:17,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:17,725 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 21:21:17,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928401027] [2020-11-11 21:21:17,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451067850] [2020-11-11 21:21:17,726 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 21:21:17,783 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-11 21:21:17,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:21:17,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:21:17,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:17,973 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 21:21:17,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:17,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:21:17,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85540405] [2020-11-11 21:21:17,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:21:17,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:17,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:21:17,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:21:17,976 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 21:21:18,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:18,172 INFO L93 Difference]: Finished difference Result 182 states and 456 transitions. [2020-11-11 21:21:18,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-11 21:21:18,173 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 21:21:18,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:18,175 INFO L225 Difference]: With dead ends: 182 [2020-11-11 21:21:18,175 INFO L226 Difference]: Without dead ends: 180 [2020-11-11 21:21:18,175 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:21:18,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-11-11 21:21:18,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 149. [2020-11-11 21:21:18,180 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 21:21:18,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 393 transitions. [2020-11-11 21:21:18,180 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 393 transitions. Word has length 13 [2020-11-11 21:21:18,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:18,181 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 393 transitions. [2020-11-11 21:21:18,181 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 21:21:18,181 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 393 transitions. [2020-11-11 21:21:18,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:21:18,181 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:18,182 INFO L494 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:18,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:21:18,393 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:18,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:18,393 INFO L82 PathProgramCache]: Analyzing trace with hash 676385412, now seen corresponding path program 37 times [2020-11-11 21:21:18,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:18,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807772619] [2020-11-11 21:21:18,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:18,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:18,493 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 21:21:18,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807772619] [2020-11-11 21:21:18,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784385279] [2020-11-11 21:21:18,494 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 21:21:18,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:18,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:21:18,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:18,727 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 21:21:18,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:18,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:21:18,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818413861] [2020-11-11 21:21:18,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:21:18,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:18,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:21:18,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:21:18,729 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 21:21:18,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:18,986 INFO L93 Difference]: Finished difference Result 187 states and 466 transitions. [2020-11-11 21:21:18,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-11 21:21:18,987 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 21:21:18,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:18,988 INFO L225 Difference]: With dead ends: 187 [2020-11-11 21:21:18,989 INFO L226 Difference]: Without dead ends: 185 [2020-11-11 21:21:18,989 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 21:21:18,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-11-11 21:21:18,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 150. [2020-11-11 21:21:18,993 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 21:21:18,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 394 transitions. [2020-11-11 21:21:18,994 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 394 transitions. Word has length 13 [2020-11-11 21:21:18,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:18,994 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 394 transitions. [2020-11-11 21:21:18,995 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 21:21:18,995 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 394 transitions. [2020-11-11 21:21:18,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:21:18,995 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:18,996 INFO L494 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:19,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-11-11 21:21:19,207 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:19,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:19,207 INFO L82 PathProgramCache]: Analyzing trace with hash -2106775881, now seen corresponding path program 38 times [2020-11-11 21:21:19,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:19,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57530345] [2020-11-11 21:21:19,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:19,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:19,308 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 21:21:19,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57530345] [2020-11-11 21:21:19,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576040902] [2020-11-11 21:21:19,309 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 21:21:19,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:21:19,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:21:19,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 21:21:19,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:19,500 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 21:21:19,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:19,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:21:19,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448211321] [2020-11-11 21:21:19,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:21:19,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:19,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:21:19,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:21:19,503 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 21:21:20,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:20,024 INFO L93 Difference]: Finished difference Result 225 states and 543 transitions. [2020-11-11 21:21:20,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-11 21:21:20,025 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 21:21:20,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:20,027 INFO L225 Difference]: With dead ends: 225 [2020-11-11 21:21:20,027 INFO L226 Difference]: Without dead ends: 220 [2020-11-11 21:21:20,028 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=198, Invalid=558, Unknown=0, NotChecked=0, Total=756 [2020-11-11 21:21:20,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-11-11 21:21:20,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 148. [2020-11-11 21:21:20,033 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 21:21:20,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 379 transitions. [2020-11-11 21:21:20,034 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 379 transitions. Word has length 13 [2020-11-11 21:21:20,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:20,035 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 379 transitions. [2020-11-11 21:21:20,036 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 21:21:20,036 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 379 transitions. [2020-11-11 21:21:20,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:21:20,036 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:20,036 INFO L494 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:20,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-11-11 21:21:20,237 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:20,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:20,238 INFO L82 PathProgramCache]: Analyzing trace with hash -2078117900, now seen corresponding path program 39 times [2020-11-11 21:21:20,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:20,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379983801] [2020-11-11 21:21:20,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:20,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:20,333 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 21:21:20,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379983801] [2020-11-11 21:21:20,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580368257] [2020-11-11 21:21:20,334 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 21:21:20,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-11 21:21:20,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:21:20,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:21:20,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:20,533 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:21:20,549 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 21:21:20,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:20,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:21:20,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681586358] [2020-11-11 21:21:20,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:21:20,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:20,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:21:20,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:21:20,551 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 21:21:21,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:21,368 INFO L93 Difference]: Finished difference Result 228 states and 540 transitions. [2020-11-11 21:21:21,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-11 21:21:21,369 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 21:21:21,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:21,371 INFO L225 Difference]: With dead ends: 228 [2020-11-11 21:21:21,371 INFO L226 Difference]: Without dead ends: 223 [2020-11-11 21:21:21,371 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=350, Invalid=982, Unknown=0, NotChecked=0, Total=1332 [2020-11-11 21:21:21,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-11-11 21:21:21,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 147. [2020-11-11 21:21:21,375 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 21:21:21,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 374 transitions. [2020-11-11 21:21:21,376 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 374 transitions. Word has length 13 [2020-11-11 21:21:21,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:21,376 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 374 transitions. [2020-11-11 21:21:21,376 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 21:21:21,376 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 374 transitions. [2020-11-11 21:21:21,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:21:21,377 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:21,377 INFO L494 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:21,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:21:21,589 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:21,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:21,589 INFO L82 PathProgramCache]: Analyzing trace with hash -2077193418, now seen corresponding path program 40 times [2020-11-11 21:21:21,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:21,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164766349] [2020-11-11 21:21:21,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:21,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:21,682 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 21:21:21,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164766349] [2020-11-11 21:21:21,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635952296] [2020-11-11 21:21:21,685 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 21:21:21,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 21:21:21,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:21:21,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:21:21,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:21,869 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:21:21,894 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 21:21:21,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:21,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:21:21,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54427236] [2020-11-11 21:21:21,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:21:21,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:21,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:21:21,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:21:21,897 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 21:21:22,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:22,645 INFO L93 Difference]: Finished difference Result 213 states and 492 transitions. [2020-11-11 21:21:22,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-11 21:21:22,646 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 21:21:22,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:22,647 INFO L225 Difference]: With dead ends: 213 [2020-11-11 21:21:22,647 INFO L226 Difference]: Without dead ends: 208 [2020-11-11 21:21:22,647 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=322, Invalid=868, Unknown=0, NotChecked=0, Total=1190 [2020-11-11 21:21:22,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-11-11 21:21:22,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 143. [2020-11-11 21:21:22,652 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 21:21:22,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 351 transitions. [2020-11-11 21:21:22,653 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 351 transitions. Word has length 13 [2020-11-11 21:21:22,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:22,653 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 351 transitions. [2020-11-11 21:21:22,653 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 21:21:22,654 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 351 transitions. [2020-11-11 21:21:22,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:21:22,654 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:22,654 INFO L494 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:22,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-11-11 21:21:22,866 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:22,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:22,866 INFO L82 PathProgramCache]: Analyzing trace with hash 13555915, now seen corresponding path program 6 times [2020-11-11 21:21:22,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:22,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187398075] [2020-11-11 21:21:22,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:22,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:22,980 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 21:21:22,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187398075] [2020-11-11 21:21:22,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508647050] [2020-11-11 21:21:22,981 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 21:21:23,032 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-11 21:21:23,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:21:23,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:21:23,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:23,194 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:21:23,211 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 21:21:23,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:23,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:21:23,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238658415] [2020-11-11 21:21:23,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:21:23,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:23,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:21:23,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:21:23,213 INFO L87 Difference]: Start difference. First operand 143 states and 351 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 21:21:23,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:23,685 INFO L93 Difference]: Finished difference Result 196 states and 469 transitions. [2020-11-11 21:21:23,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-11 21:21:23,691 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 21:21:23,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:23,692 INFO L225 Difference]: With dead ends: 196 [2020-11-11 21:21:23,692 INFO L226 Difference]: Without dead ends: 191 [2020-11-11 21:21:23,692 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=259, Invalid=611, Unknown=0, NotChecked=0, Total=870 [2020-11-11 21:21:23,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-11-11 21:21:23,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 151. [2020-11-11 21:21:23,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.546666666666667) internal successors, (382), 150 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:23,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 382 transitions. [2020-11-11 21:21:23,696 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 382 transitions. Word has length 13 [2020-11-11 21:21:23,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:23,696 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 382 transitions. [2020-11-11 21:21:23,697 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 21:21:23,697 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 382 transitions. [2020-11-11 21:21:23,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:21:23,697 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:23,697 INFO L494 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:23,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:21:23,908 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:23,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:23,908 INFO L82 PathProgramCache]: Analyzing trace with hash 879672664, now seen corresponding path program 7 times [2020-11-11 21:21:23,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:23,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88785119] [2020-11-11 21:21:23,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:23,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:24,050 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 21:21:24,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88785119] [2020-11-11 21:21:24,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896718439] [2020-11-11 21:21:24,050 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 21:21:24,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:24,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-11 21:21:24,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:24,260 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 21:21:24,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-11 21:21:24,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 18 [2020-11-11 21:21:24,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611811526] [2020-11-11 21:21:24,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-11 21:21:24,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:24,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-11 21:21:24,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-11-11 21:21:24,261 INFO L87 Difference]: Start difference. First operand 151 states and 382 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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 21:21:24,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:24,301 INFO L93 Difference]: Finished difference Result 233 states and 611 transitions. [2020-11-11 21:21:24,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-11 21:21:24,302 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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 21:21:24,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:24,303 INFO L225 Difference]: With dead ends: 233 [2020-11-11 21:21:24,303 INFO L226 Difference]: Without dead ends: 213 [2020-11-11 21:21:24,303 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-11-11 21:21:24,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-11-11 21:21:24,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2020-11-11 21:21:24,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.6556603773584904) internal successors, (563), 212 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:24,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 563 transitions. [2020-11-11 21:21:24,308 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 563 transitions. Word has length 14 [2020-11-11 21:21:24,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:24,310 INFO L481 AbstractCegarLoop]: Abstraction has 213 states and 563 transitions. [2020-11-11 21:21:24,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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 21:21:24,310 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 563 transitions. [2020-11-11 21:21:24,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:21:24,311 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:24,311 INFO L494 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:24,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:21:24,521 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:24,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:24,522 INFO L82 PathProgramCache]: Analyzing trace with hash 879373793, now seen corresponding path program 41 times [2020-11-11 21:21:24,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:24,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13534067] [2020-11-11 21:21:24,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:24,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:24,644 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 21:21:24,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13534067] [2020-11-11 21:21:24,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578866016] [2020-11-11 21:21:24,645 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 21:21:24,695 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-11 21:21:24,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:21:24,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:21:24,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:24,893 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:21:24,919 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 21:21:24,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:24,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:21:24,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816362602] [2020-11-11 21:21:24,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:21:24,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:24,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:21:24,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:21:24,921 INFO L87 Difference]: Start difference. First operand 213 states and 563 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 21:21:25,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:25,899 INFO L93 Difference]: Finished difference Result 291 states and 730 transitions. [2020-11-11 21:21:25,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 21:21:25,901 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 21:21:25,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:25,903 INFO L225 Difference]: With dead ends: 291 [2020-11-11 21:21:25,903 INFO L226 Difference]: Without dead ends: 286 [2020-11-11 21:21:25,904 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=415, Invalid=1067, Unknown=0, NotChecked=0, Total=1482 [2020-11-11 21:21:25,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-11-11 21:21:25,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 215. [2020-11-11 21:21:25,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.663551401869159) internal successors, (570), 214 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:25,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 570 transitions. [2020-11-11 21:21:25,910 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 570 transitions. Word has length 14 [2020-11-11 21:21:25,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:25,910 INFO L481 AbstractCegarLoop]: Abstraction has 215 states and 570 transitions. [2020-11-11 21:21:25,910 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 21:21:25,911 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 570 transitions. [2020-11-11 21:21:25,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:21:25,911 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:25,911 INFO L494 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:26,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-11-11 21:21:26,121 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:26,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:26,121 INFO L82 PathProgramCache]: Analyzing trace with hash 855363053, now seen corresponding path program 42 times [2020-11-11 21:21:26,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:26,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047453986] [2020-11-11 21:21:26,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:26,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:26,244 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 21:21:26,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047453986] [2020-11-11 21:21:26,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530252998] [2020-11-11 21:21:26,245 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 21:21:26,316 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-11 21:21:26,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:21:26,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:21:26,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:26,570 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 21:21:26,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:26,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:21:26,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62649752] [2020-11-11 21:21:26,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:21:26,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:26,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:21:26,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:21:26,572 INFO L87 Difference]: Start difference. First operand 215 states and 570 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 21:21:26,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:26,959 INFO L93 Difference]: Finished difference Result 284 states and 701 transitions. [2020-11-11 21:21:26,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-11 21:21:26,961 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 21:21:26,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:26,963 INFO L225 Difference]: With dead ends: 284 [2020-11-11 21:21:26,963 INFO L226 Difference]: Without dead ends: 282 [2020-11-11 21:21:26,964 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=180, Invalid=522, Unknown=0, NotChecked=0, Total=702 [2020-11-11 21:21:26,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-11-11 21:21:26,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 217. [2020-11-11 21:21:26,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 2.6574074074074074) internal successors, (574), 216 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:26,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 574 transitions. [2020-11-11 21:21:26,970 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 574 transitions. Word has length 14 [2020-11-11 21:21:26,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:26,971 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 574 transitions. [2020-11-11 21:21:26,971 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 21:21:26,971 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 574 transitions. [2020-11-11 21:21:26,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:21:26,972 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:26,972 INFO L494 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:27,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:21:27,181 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:27,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:27,181 INFO L82 PathProgramCache]: Analyzing trace with hash 870406702, now seen corresponding path program 43 times [2020-11-11 21:21:27,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:27,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945452904] [2020-11-11 21:21:27,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:27,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:27,305 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 21:21:27,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945452904] [2020-11-11 21:21:27,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760113848] [2020-11-11 21:21:27,305 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 21:21:27,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:27,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:21:27,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:27,554 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:21:27,579 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 21:21:27,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:27,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:21:27,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135443671] [2020-11-11 21:21:27,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:21:27,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:27,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:21:27,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:21:27,581 INFO L87 Difference]: Start difference. First operand 217 states and 574 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 21:21:28,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:28,649 INFO L93 Difference]: Finished difference Result 303 states and 764 transitions. [2020-11-11 21:21:28,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-11 21:21:28,650 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 21:21:28,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:28,653 INFO L225 Difference]: With dead ends: 303 [2020-11-11 21:21:28,653 INFO L226 Difference]: Without dead ends: 298 [2020-11-11 21:21:28,654 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=468, Invalid=1172, Unknown=0, NotChecked=0, Total=1640 [2020-11-11 21:21:28,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-11-11 21:21:28,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 218. [2020-11-11 21:21:28,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.6682027649769586) internal successors, (579), 217 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:28,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 579 transitions. [2020-11-11 21:21:28,660 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 579 transitions. Word has length 14 [2020-11-11 21:21:28,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:28,660 INFO L481 AbstractCegarLoop]: Abstraction has 218 states and 579 transitions. [2020-11-11 21:21:28,660 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 21:21:28,660 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 579 transitions. [2020-11-11 21:21:28,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:21:28,661 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:28,661 INFO L494 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:28,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-11-11 21:21:28,876 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:28,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:28,876 INFO L82 PathProgramCache]: Analyzing trace with hash 870407663, now seen corresponding path program 44 times [2020-11-11 21:21:28,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:28,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348165604] [2020-11-11 21:21:28,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:28,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:29,010 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 21:21:29,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348165604] [2020-11-11 21:21:29,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816102550] [2020-11-11 21:21:29,011 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 21:21:29,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:21:29,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:21:29,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:21:29,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:29,268 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:21:29,366 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 21:21:29,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:29,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:21:29,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836142784] [2020-11-11 21:21:29,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:21:29,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:29,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:21:29,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:21:29,368 INFO L87 Difference]: Start difference. First operand 218 states and 579 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 21:21:30,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:30,599 INFO L93 Difference]: Finished difference Result 315 states and 786 transitions. [2020-11-11 21:21:30,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-11 21:21:30,600 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 21:21:30,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:30,602 INFO L225 Difference]: With dead ends: 315 [2020-11-11 21:21:30,602 INFO L226 Difference]: Without dead ends: 310 [2020-11-11 21:21:30,603 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 21:21:30,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-11-11 21:21:30,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 219. [2020-11-11 21:21:30,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.665137614678899) internal successors, (581), 218 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:30,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 581 transitions. [2020-11-11 21:21:30,608 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 581 transitions. Word has length 14 [2020-11-11 21:21:30,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:30,608 INFO L481 AbstractCegarLoop]: Abstraction has 219 states and 581 transitions. [2020-11-11 21:21:30,608 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 21:21:30,608 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 581 transitions. [2020-11-11 21:21:30,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:21:30,609 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:30,609 INFO L494 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:30,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-11-11 21:21:30,822 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:30,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:30,822 INFO L82 PathProgramCache]: Analyzing trace with hash 126049582, now seen corresponding path program 45 times [2020-11-11 21:21:30,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:30,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707419906] [2020-11-11 21:21:30,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:30,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:30,942 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 21:21:30,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707419906] [2020-11-11 21:21:30,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163721415] [2020-11-11 21:21:30,943 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 21:21:30,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-11 21:21:30,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:21:30,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:21:30,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:31,241 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 21:21:31,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:31,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:21:31,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262749135] [2020-11-11 21:21:31,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:21:31,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:31,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:21:31,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:21:31,243 INFO L87 Difference]: Start difference. First operand 219 states and 581 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 21:21:31,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:31,619 INFO L93 Difference]: Finished difference Result 297 states and 733 transitions. [2020-11-11 21:21:31,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-11 21:21:31,620 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 21:21:31,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:31,621 INFO L225 Difference]: With dead ends: 297 [2020-11-11 21:21:31,621 INFO L226 Difference]: Without dead ends: 295 [2020-11-11 21:21:31,622 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2020-11-11 21:21:31,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-11-11 21:21:31,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 222. [2020-11-11 21:21:31,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.669683257918552) internal successors, (590), 221 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:31,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 590 transitions. [2020-11-11 21:21:31,628 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 590 transitions. Word has length 14 [2020-11-11 21:21:31,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:31,628 INFO L481 AbstractCegarLoop]: Abstraction has 222 states and 590 transitions. [2020-11-11 21:21:31,628 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 21:21:31,628 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 590 transitions. [2020-11-11 21:21:31,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:21:31,629 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:31,629 INFO L494 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:31,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-11-11 21:21:31,841 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:31,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:31,841 INFO L82 PathProgramCache]: Analyzing trace with hash 126050543, now seen corresponding path program 46 times [2020-11-11 21:21:31,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:31,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276711885] [2020-11-11 21:21:31,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:31,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:31,955 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 21:21:31,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276711885] [2020-11-11 21:21:31,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515458143] [2020-11-11 21:21:31,956 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 21:21:32,003 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 21:21:32,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:21:32,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:21:32,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:32,272 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 21:21:32,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:32,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:21:32,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177824613] [2020-11-11 21:21:32,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:21:32,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:32,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:21:32,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:21:32,273 INFO L87 Difference]: Start difference. First operand 222 states and 590 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 21:21:32,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:32,689 INFO L93 Difference]: Finished difference Result 296 states and 730 transitions. [2020-11-11 21:21:32,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-11 21:21:32,690 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 21:21:32,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:32,692 INFO L225 Difference]: With dead ends: 296 [2020-11-11 21:21:32,692 INFO L226 Difference]: Without dead ends: 294 [2020-11-11 21:21:32,692 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=173, Invalid=529, Unknown=0, NotChecked=0, Total=702 [2020-11-11 21:21:32,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-11-11 21:21:32,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 223. [2020-11-11 21:21:32,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.6621621621621623) internal successors, (591), 222 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:32,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 591 transitions. [2020-11-11 21:21:32,697 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 591 transitions. Word has length 14 [2020-11-11 21:21:32,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:32,697 INFO L481 AbstractCegarLoop]: Abstraction has 223 states and 591 transitions. [2020-11-11 21:21:32,697 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 21:21:32,697 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 591 transitions. [2020-11-11 21:21:32,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:21:32,698 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:32,698 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:32,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-11-11 21:21:32,899 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:32,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:32,900 INFO L82 PathProgramCache]: Analyzing trace with hash 592426881, now seen corresponding path program 47 times [2020-11-11 21:21:32,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:32,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292175906] [2020-11-11 21:21:32,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:32,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:33,026 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 21:21:33,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292175906] [2020-11-11 21:21:33,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449379177] [2020-11-11 21:21:33,027 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 21:21:33,073 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:21:33,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:21:33,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:21:33,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:33,288 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:21:33,311 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 21:21:33,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:33,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:21:33,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860166064] [2020-11-11 21:21:33,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:21:33,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:33,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:21:33,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:21:33,313 INFO L87 Difference]: Start difference. First operand 223 states and 591 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 21:21:34,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:34,594 INFO L93 Difference]: Finished difference Result 324 states and 819 transitions. [2020-11-11 21:21:34,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-11 21:21:34,595 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 21:21:34,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:34,598 INFO L225 Difference]: With dead ends: 324 [2020-11-11 21:21:34,598 INFO L226 Difference]: Without dead ends: 316 [2020-11-11 21:21:34,598 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 21:21:34,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2020-11-11 21:21:34,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 228. [2020-11-11 21:21:34,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.7136563876651985) internal successors, (616), 227 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:34,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 616 transitions. [2020-11-11 21:21:34,604 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 616 transitions. Word has length 14 [2020-11-11 21:21:34,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:34,604 INFO L481 AbstractCegarLoop]: Abstraction has 228 states and 616 transitions. [2020-11-11 21:21:34,605 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 21:21:34,605 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 616 transitions. [2020-11-11 21:21:34,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:21:34,605 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:34,605 INFO L494 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:34,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:21:34,821 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:34,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:34,821 INFO L82 PathProgramCache]: Analyzing trace with hash 592427842, now seen corresponding path program 48 times [2020-11-11 21:21:34,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:34,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142536385] [2020-11-11 21:21:34,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:34,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:34,947 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 21:21:34,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142536385] [2020-11-11 21:21:34,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005436983] [2020-11-11 21:21:34,948 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 21:21:34,996 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-11 21:21:34,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:21:34,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:21:34,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:35,258 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:21:36,673 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 21:21:36,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:36,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-11-11 21:21:36,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511565445] [2020-11-11 21:21:36,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 21:21:36,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:36,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 21:21:36,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=240, Unknown=1, NotChecked=0, Total=306 [2020-11-11 21:21:36,675 INFO L87 Difference]: Start difference. First operand 228 states and 616 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 21:21:41,520 WARN L193 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2020-11-11 21:21:48,187 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 24 [2020-11-11 21:21:51,978 WARN L193 SmtUtils]: Spent 1.36 s on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2020-11-11 21:22:06,050 WARN L193 SmtUtils]: Spent 1.67 s on a formula simplification. DAG size of input: 48 DAG size of output: 27 [2020-11-11 21:22:09,214 WARN L193 SmtUtils]: Spent 2.89 s on a formula simplification. DAG size of input: 44 DAG size of output: 23 [2020-11-11 21:22:16,647 WARN L193 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-11-11 21:22:24,064 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 39 DAG size of output: 20 [2020-11-11 21:22:47,174 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 37 [2020-11-11 21:23:29,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:23:29,057 INFO L93 Difference]: Finished difference Result 402 states and 992 transitions. [2020-11-11 21:23:29,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-11-11 21:23:29,058 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 21:23:29,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:23:29,061 INFO L225 Difference]: With dead ends: 402 [2020-11-11 21:23:29,061 INFO L226 Difference]: Without dead ends: 397 [2020-11-11 21:23:29,062 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 50.8s TimeCoverageRelationStatistics Valid=716, Invalid=1920, Unknown=16, NotChecked=0, Total=2652 [2020-11-11 21:23:29,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2020-11-11 21:23:29,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 228. [2020-11-11 21:23:29,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.7048458149779737) internal successors, (614), 227 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:23:29,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 614 transitions. [2020-11-11 21:23:29,069 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 614 transitions. Word has length 14 [2020-11-11 21:23:29,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:23:29,069 INFO L481 AbstractCegarLoop]: Abstraction has 228 states and 614 transitions. [2020-11-11 21:23:29,069 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 21:23:29,069 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 614 transitions. [2020-11-11 21:23:29,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:23:29,070 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:23:29,070 INFO L494 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:23:29,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:23:29,284 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:23:29,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:23:29,284 INFO L82 PathProgramCache]: Analyzing trace with hash 592456672, now seen corresponding path program 49 times [2020-11-11 21:23:29,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:23:29,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634961136] [2020-11-11 21:23:29,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:23:29,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:23:29,427 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 21:23:29,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634961136] [2020-11-11 21:23:29,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051060350] [2020-11-11 21:23:29,428 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 21:23:29,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:23:29,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:23:29,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:23:29,784 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:23:29,841 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 21:23:29,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:23:29,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:23:29,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508232066] [2020-11-11 21:23:29,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:23:29,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:23:29,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:23:29,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:23:29,842 INFO L87 Difference]: Start difference. First operand 228 states and 614 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 21:23:31,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:23:31,331 INFO L93 Difference]: Finished difference Result 349 states and 880 transitions. [2020-11-11 21:23:31,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-11 21:23:31,332 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 21:23:31,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:23:31,335 INFO L225 Difference]: With dead ends: 349 [2020-11-11 21:23:31,335 INFO L226 Difference]: Without dead ends: 344 [2020-11-11 21:23:31,335 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 21:23:31,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2020-11-11 21:23:31,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 229. [2020-11-11 21:23:31,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.7149122807017543) internal successors, (619), 228 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:23:31,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 619 transitions. [2020-11-11 21:23:31,343 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 619 transitions. Word has length 14 [2020-11-11 21:23:31,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:23:31,344 INFO L481 AbstractCegarLoop]: Abstraction has 229 states and 619 transitions. [2020-11-11 21:23:31,344 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 21:23:31,344 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 619 transitions. [2020-11-11 21:23:31,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:23:31,345 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:23:31,345 INFO L494 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:23:31,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:23:31,560 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:23:31,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:23:31,560 INFO L82 PathProgramCache]: Analyzing trace with hash 592457633, now seen corresponding path program 50 times [2020-11-11 21:23:31,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:23:31,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765154746] [2020-11-11 21:23:31,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:23:31,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:23:31,710 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 21:23:31,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765154746] [2020-11-11 21:23:31,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689523946] [2020-11-11 21:23:31,710 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 21:23:31,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:23:31,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:23:31,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:23:31,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:23:32,038 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:23:32,047 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:23:32,053 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:23:34,116 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 21:23:34,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:23:34,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-11-11 21:23:34,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789716516] [2020-11-11 21:23:34,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 21:23:34,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:23:34,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 21:23:34,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=238, Unknown=1, NotChecked=0, Total=306 [2020-11-11 21:23:34,118 INFO L87 Difference]: Start difference. First operand 229 states and 619 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 21:23:38,521 WARN L193 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-11-11 21:23:39,021 WARN L193 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 24 [2020-11-11 21:23:41,110 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 44 [2020-11-11 21:23:51,532 WARN L193 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2020-11-11 21:24:01,687 WARN L193 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 41 [2020-11-11 21:24:17,931 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-11 21:24:34,488 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2020-11-11 21:24:48,958 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2020-11-11 21:25:05,410 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 45 [2020-11-11 21:25:52,373 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 51 [2020-11-11 21:26:10,743 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2020-11-11 21:27:04,214 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 48 [2020-11-11 21:27:16,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:27:16,419 INFO L93 Difference]: Finished difference Result 414 states and 1004 transitions. [2020-11-11 21:27:16,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-11-11 21:27:16,449 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 21:27:16,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:27:16,451 INFO L225 Difference]: With dead ends: 414 [2020-11-11 21:27:16,451 INFO L226 Difference]: Without dead ends: 405 [2020-11-11 21:27:16,452 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 900 ImplicationChecksByTransitivity, 131.3s TimeCoverageRelationStatistics Valid=778, Invalid=2255, Unknown=47, NotChecked=0, Total=3080 [2020-11-11 21:27:16,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2020-11-11 21:27:16,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 228. [2020-11-11 21:27:16,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.700440528634361) internal successors, (613), 227 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:27:16,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 613 transitions. [2020-11-11 21:27:16,458 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 613 transitions. Word has length 14 [2020-11-11 21:27:16,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:27:16,458 INFO L481 AbstractCegarLoop]: Abstraction has 228 states and 613 transitions. [2020-11-11 21:27:16,458 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 21:27:16,458 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 613 transitions. [2020-11-11 21:27:16,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:27:16,459 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:27:16,459 INFO L494 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:27:16,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2020-11-11 21:27:16,674 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:27:16,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:27:16,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1007830578, now seen corresponding path program 51 times [2020-11-11 21:27:16,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:27:16,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469583157] [2020-11-11 21:27:16,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:27:16,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:27:16,914 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 21:27:16,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469583157] [2020-11-11 21:27:16,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967759842] [2020-11-11 21:27:16,914 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 21:27:16,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-11 21:27:16,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:27:16,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:27:16,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:27:17,472 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 21:27:17,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:27:17,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:27:17,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153421568] [2020-11-11 21:27:17,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:27:17,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:27:17,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:27:17,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:27:17,474 INFO L87 Difference]: Start difference. First operand 228 states and 613 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 21:27:18,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:27:18,268 INFO L93 Difference]: Finished difference Result 323 states and 800 transitions. [2020-11-11 21:27:18,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-11 21:27:18,269 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 21:27:18,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:27:18,272 INFO L225 Difference]: With dead ends: 323 [2020-11-11 21:27:18,272 INFO L226 Difference]: Without dead ends: 321 [2020-11-11 21:27:18,272 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2020-11-11 21:27:18,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2020-11-11 21:27:18,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 233. [2020-11-11 21:27:18,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.6982758620689653) internal successors, (626), 232 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 21:27:18,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 626 transitions. [2020-11-11 21:27:18,277 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 626 transitions. Word has length 14 [2020-11-11 21:27:18,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:27:18,277 INFO L481 AbstractCegarLoop]: Abstraction has 233 states and 626 transitions. [2020-11-11 21:27:18,277 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 21:27:18,277 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 626 transitions. [2020-11-11 21:27:18,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:27:18,278 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:27:18,278 INFO L494 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:27:18,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:27:18,479 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:27:18,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:27:18,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1007801748, now seen corresponding path program 52 times [2020-11-11 21:27:18,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:27:18,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891225098] [2020-11-11 21:27:18,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:27:18,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:27:18,675 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 21:27:18,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891225098] [2020-11-11 21:27:18,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926532472] [2020-11-11 21:27:18,676 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 21:27:18,721 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 21:27:18,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:27:18,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:27:18,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:27:19,258 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 21:27:19,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:27:19,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:27:19,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244221961] [2020-11-11 21:27:19,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:27:19,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:27:19,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:27:19,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:27:19,260 INFO L87 Difference]: Start difference. First operand 233 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 21:27:19,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:27:19,991 INFO L93 Difference]: Finished difference Result 315 states and 780 transitions. [2020-11-11 21:27:19,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-11 21:27:19,993 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 21:27:19,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:27:19,995 INFO L225 Difference]: With dead ends: 315 [2020-11-11 21:27:19,996 INFO L226 Difference]: Without dead ends: 313 [2020-11-11 21:27:19,996 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=168, Invalid=534, Unknown=0, NotChecked=0, Total=702 [2020-11-11 21:27:19,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-11-11 21:27:20,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 232. [2020-11-11 21:27:20,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 2.696969696969697) internal successors, (623), 231 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:27:20,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 623 transitions. [2020-11-11 21:27:20,002 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 623 transitions. Word has length 14 [2020-11-11 21:27:20,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:27:20,002 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 623 transitions. [2020-11-11 21:27:20,002 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 21:27:20,002 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 623 transitions. [2020-11-11 21:27:20,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:27:20,003 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:27:20,003 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:27:20,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2020-11-11 21:27:20,215 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:27:20,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:27:20,216 INFO L82 PathProgramCache]: Analyzing trace with hash 564987983, now seen corresponding path program 53 times [2020-11-11 21:27:20,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:27:20,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801413445] [2020-11-11 21:27:20,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:27:20,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:27:20,433 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 21:27:20,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801413445] [2020-11-11 21:27:20,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453398696] [2020-11-11 21:27:20,434 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 21:27:20,481 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-11 21:27:20,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:27:20,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:27:20,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:27:20,927 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:27:23,161 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 21:27:23,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:27:23,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-11-11 21:27:23,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890937801] [2020-11-11 21:27:23,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 21:27:23,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:27:23,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 21:27:23,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=241, Unknown=1, NotChecked=0, Total=306 [2020-11-11 21:27:23,163 INFO L87 Difference]: Start difference. First operand 232 states and 623 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 21:27:28,615 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-11-11 21:27:39,016 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2020-11-11 21:27:43,345 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2020-11-11 21:27:49,646 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2020-11-11 21:28:18,727 WARN L193 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2020-11-11 21:28:43,925 WARN L193 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-11-11 21:28:56,231 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 40 [2020-11-11 21:29:53,346 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 37 [2020-11-11 21:30:32,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:30:32,422 INFO L93 Difference]: Finished difference Result 446 states and 1093 transitions. [2020-11-11 21:30:32,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-11-11 21:30:32,427 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 21:30:32,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:30:32,430 INFO L225 Difference]: With dead ends: 446 [2020-11-11 21:30:32,430 INFO L226 Difference]: Without dead ends: 436 [2020-11-11 21:30:32,430 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 93.8s TimeCoverageRelationStatistics Valid=741, Invalid=2089, Unknown=32, NotChecked=0, Total=2862 [2020-11-11 21:30:32,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2020-11-11 21:30:32,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 239. [2020-11-11 21:30:32,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.73109243697479) internal successors, (650), 238 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 21:30:32,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 650 transitions. [2020-11-11 21:30:32,435 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 650 transitions. Word has length 14 [2020-11-11 21:30:32,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:30:32,435 INFO L481 AbstractCegarLoop]: Abstraction has 239 states and 650 transitions. [2020-11-11 21:30:32,436 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 21:30:32,436 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 650 transitions. [2020-11-11 21:30:32,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:30:32,436 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:30:32,436 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:30:32,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:30:32,637 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:30:32,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:30:32,638 INFO L82 PathProgramCache]: Analyzing trace with hash 565016813, now seen corresponding path program 54 times [2020-11-11 21:30:32,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:30:32,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174700982] [2020-11-11 21:30:32,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:30:32,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:30:32,861 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 21:30:32,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174700982] [2020-11-11 21:30:32,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135462530] [2020-11-11 21:30:32,862 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 21:30:32,909 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-11 21:30:32,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:30:32,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:30:32,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:30:33,408 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:30:33,410 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:30:33,412 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:30:33,544 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 21:30:33,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:30:33,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:30:33,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296186212] [2020-11-11 21:30:33,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:30:33,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:30:33,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:30:33,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:30:33,546 INFO L87 Difference]: Start difference. First operand 239 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 21:30:36,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:30:36,252 INFO L93 Difference]: Finished difference Result 397 states and 1002 transitions. [2020-11-11 21:30:36,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-11 21:30:36,254 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 21:30:36,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:30:36,260 INFO L225 Difference]: With dead ends: 397 [2020-11-11 21:30:36,260 INFO L226 Difference]: Without dead ends: 389 [2020-11-11 21:30:36,261 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=459, Invalid=1263, Unknown=0, NotChecked=0, Total=1722 [2020-11-11 21:30:36,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2020-11-11 21:30:36,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 241. [2020-11-11 21:30:36,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.75) internal successors, (660), 240 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:30:36,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 660 transitions. [2020-11-11 21:30:36,266 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 660 transitions. Word has length 14 [2020-11-11 21:30:36,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:30:36,266 INFO L481 AbstractCegarLoop]: Abstraction has 241 states and 660 transitions. [2020-11-11 21:30:36,266 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 21:30:36,267 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 660 transitions. [2020-11-11 21:30:36,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:30:36,267 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:30:36,267 INFO L494 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:30:36,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2020-11-11 21:30:36,470 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:30:36,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:30:36,470 INFO L82 PathProgramCache]: Analyzing trace with hash 565017774, now seen corresponding path program 55 times [2020-11-11 21:30:36,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:30:36,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908651499] [2020-11-11 21:30:36,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:30:36,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:30:36,688 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 21:30:36,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908651499] [2020-11-11 21:30:36,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205814046] [2020-11-11 21:30:36,689 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 21:30:36,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:30:36,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:30:36,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:30:37,149 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:30:37,152 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:30:37,154 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:30:37,325 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 21:30:37,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:30:37,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:30:37,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512346719] [2020-11-11 21:30:37,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:30:37,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:30:37,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:30:37,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:30:37,327 INFO L87 Difference]: Start difference. First operand 241 states and 660 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 21:30:40,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:30:40,402 INFO L93 Difference]: Finished difference Result 413 states and 1046 transitions. [2020-11-11 21:30:40,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-11 21:30:40,404 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 21:30:40,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:30:40,407 INFO L225 Difference]: With dead ends: 413 [2020-11-11 21:30:40,407 INFO L226 Difference]: Without dead ends: 405 [2020-11-11 21:30:40,407 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=559, Invalid=1603, Unknown=0, NotChecked=0, Total=2162 [2020-11-11 21:30:40,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2020-11-11 21:30:40,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 240. [2020-11-11 21:30:40,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.7531380753138075) internal successors, (658), 239 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:30:40,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 658 transitions. [2020-11-11 21:30:40,413 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 658 transitions. Word has length 14 [2020-11-11 21:30:40,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:30:40,413 INFO L481 AbstractCegarLoop]: Abstraction has 240 states and 658 transitions. [2020-11-11 21:30:40,413 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 21:30:40,413 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 658 transitions. [2020-11-11 21:30:40,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:30:40,413 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:30:40,413 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:30:40,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:30:40,614 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:30:40,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:30:40,615 INFO L82 PathProgramCache]: Analyzing trace with hash 565910543, now seen corresponding path program 56 times [2020-11-11 21:30:40,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:30:40,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369860051] [2020-11-11 21:30:40,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:30:40,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:30:40,832 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 21:30:40,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369860051] [2020-11-11 21:30:40,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179685761] [2020-11-11 21:30:40,832 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 21:30:40,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:30:40,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:30:40,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:30:40,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:30:41,334 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:30:41,439 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 21:30:41,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:30:41,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:30:41,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514586198] [2020-11-11 21:30:41,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:30:41,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:30:41,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:30:41,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:30:41,441 INFO L87 Difference]: Start difference. First operand 240 states and 658 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 21:30:44,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:30:44,214 INFO L93 Difference]: Finished difference Result 364 states and 938 transitions. [2020-11-11 21:30:44,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-11 21:30:44,223 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 21:30:44,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:30:44,226 INFO L225 Difference]: With dead ends: 364 [2020-11-11 21:30:44,226 INFO L226 Difference]: Without dead ends: 359 [2020-11-11 21:30:44,226 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=506, Invalid=1474, Unknown=0, NotChecked=0, Total=1980 [2020-11-11 21:30:44,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2020-11-11 21:30:44,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 241. [2020-11-11 21:30:44,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.7625) internal successors, (663), 240 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:30:44,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 663 transitions. [2020-11-11 21:30:44,231 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 663 transitions. Word has length 14 [2020-11-11 21:30:44,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:30:44,232 INFO L481 AbstractCegarLoop]: Abstraction has 241 states and 663 transitions. [2020-11-11 21:30:44,232 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 21:30:44,232 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 663 transitions. [2020-11-11 21:30:44,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:30:44,232 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:30:44,233 INFO L494 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:30:44,433 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-11-11 21:30:44,434 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:30:44,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:30:44,434 INFO L82 PathProgramCache]: Analyzing trace with hash 565911504, now seen corresponding path program 57 times [2020-11-11 21:30:44,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:30:44,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853287361] [2020-11-11 21:30:44,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:30:44,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:30:44,704 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 21:30:44,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853287361] [2020-11-11 21:30:44,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926360957] [2020-11-11 21:30:44,704 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 21:30:44,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-11 21:30:44,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:30:44,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:30:44,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:30:45,346 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:30:45,486 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 21:30:45,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:30:45,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:30:45,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772834393] [2020-11-11 21:30:45,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:30:45,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:30:45,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:30:45,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:30:45,487 INFO L87 Difference]: Start difference. First operand 241 states and 663 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 21:30:48,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:30:48,126 INFO L93 Difference]: Finished difference Result 379 states and 970 transitions. [2020-11-11 21:30:48,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-11 21:30:48,128 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 21:30:48,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:30:48,131 INFO L225 Difference]: With dead ends: 379 [2020-11-11 21:30:48,132 INFO L226 Difference]: Without dead ends: 374 [2020-11-11 21:30:48,132 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=485, Invalid=1321, Unknown=0, NotChecked=0, Total=1806 [2020-11-11 21:30:48,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2020-11-11 21:30:48,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 238. [2020-11-11 21:30:48,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.7510548523206753) internal successors, (652), 237 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:30:48,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 652 transitions. [2020-11-11 21:30:48,137 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 652 transitions. Word has length 14 [2020-11-11 21:30:48,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:30:48,137 INFO L481 AbstractCegarLoop]: Abstraction has 238 states and 652 transitions. [2020-11-11 21:30:48,137 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 21:30:48,137 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 652 transitions. [2020-11-11 21:30:48,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:30:48,138 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:30:48,138 INFO L494 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:30:48,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2020-11-11 21:30:48,339 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:30:48,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:30:48,339 INFO L82 PathProgramCache]: Analyzing trace with hash 565940334, now seen corresponding path program 58 times [2020-11-11 21:30:48,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:30:48,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929429036] [2020-11-11 21:30:48,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:30:48,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:30:48,577 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 21:30:48,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929429036] [2020-11-11 21:30:48,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456799569] [2020-11-11 21:30:48,578 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 21:30:48,623 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 21:30:48,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:30:48,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:30:48,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:30:49,041 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:30:49,140 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 21:30:49,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:30:49,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:30:49,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370819985] [2020-11-11 21:30:49,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:30:49,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:30:49,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:30:49,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:30:49,142 INFO L87 Difference]: Start difference. First operand 238 states and 652 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 21:30:51,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:30:51,645 INFO L93 Difference]: Finished difference Result 367 states and 943 transitions. [2020-11-11 21:30:51,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-11 21:30:51,647 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 21:30:51,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:30:51,650 INFO L225 Difference]: With dead ends: 367 [2020-11-11 21:30:51,651 INFO L226 Difference]: Without dead ends: 362 [2020-11-11 21:30:51,651 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=426, Invalid=1214, Unknown=0, NotChecked=0, Total=1640 [2020-11-11 21:30:51,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-11-11 21:30:51,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 236. [2020-11-11 21:30:51,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.7319148936170214) internal successors, (642), 235 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:30:51,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 642 transitions. [2020-11-11 21:30:51,656 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 642 transitions. Word has length 14 [2020-11-11 21:30:51,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:30:51,656 INFO L481 AbstractCegarLoop]: Abstraction has 236 states and 642 transitions. [2020-11-11 21:30:51,657 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 21:30:51,657 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 642 transitions. [2020-11-11 21:30:51,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:30:51,657 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:30:51,657 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:30:51,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:30:51,859 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:30:51,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:30:51,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1798378131, now seen corresponding path program 59 times [2020-11-11 21:30:51,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:30:51,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967531635] [2020-11-11 21:30:51,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:30:51,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:30:52,081 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 21:30:52,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967531635] [2020-11-11 21:30:52,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665885836] [2020-11-11 21:30:52,082 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 21:30:52,130 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-11 21:30:52,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:30:52,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:30:52,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:30:52,608 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 21:30:52,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:30:52,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:30:52,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837497316] [2020-11-11 21:30:52,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:30:52,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:30:52,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:30:52,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:30:52,609 INFO L87 Difference]: Start difference. First operand 236 states and 642 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 21:30:53,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:30:53,462 INFO L93 Difference]: Finished difference Result 334 states and 840 transitions. [2020-11-11 21:30:53,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-11 21:30:53,465 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 21:30:53,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:30:53,468 INFO L225 Difference]: With dead ends: 334 [2020-11-11 21:30:53,468 INFO L226 Difference]: Without dead ends: 332 [2020-11-11 21:30:53,468 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2020-11-11 21:30:53,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2020-11-11 21:30:53,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 248. [2020-11-11 21:30:53,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.7449392712550607) internal successors, (678), 247 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:30:53,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 678 transitions. [2020-11-11 21:30:53,473 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 678 transitions. Word has length 14 [2020-11-11 21:30:53,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:30:53,473 INFO L481 AbstractCegarLoop]: Abstraction has 248 states and 678 transitions. [2020-11-11 21:30:53,473 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 21:30:53,473 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 678 transitions. [2020-11-11 21:30:53,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:30:53,480 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:30:53,480 INFO L494 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:30:53,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:30:53,681 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:30:53,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:30:53,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1797483440, now seen corresponding path program 60 times [2020-11-11 21:30:53,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:30:53,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947538384] [2020-11-11 21:30:53,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:30:53,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:30:53,891 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 21:30:53,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947538384] [2020-11-11 21:30:53,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495292040] [2020-11-11 21:30:53,892 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 21:30:53,939 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-11 21:30:53,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:30:53,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:30:53,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:30:54,327 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 21:30:54,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:30:54,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:30:54,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998312081] [2020-11-11 21:30:54,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:30:54,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:30:54,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:30:54,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:30:54,329 INFO L87 Difference]: Start difference. First operand 248 states and 678 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 21:30:55,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:30:55,039 INFO L93 Difference]: Finished difference Result 346 states and 864 transitions. [2020-11-11 21:30:55,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-11 21:30:55,042 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 21:30:55,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:30:55,044 INFO L225 Difference]: With dead ends: 346 [2020-11-11 21:30:55,044 INFO L226 Difference]: Without dead ends: 344 [2020-11-11 21:30:55,044 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=178, Invalid=524, Unknown=0, NotChecked=0, Total=702 [2020-11-11 21:30:55,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2020-11-11 21:30:55,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 251. [2020-11-11 21:30:55,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 2.74) internal successors, (685), 250 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 21:30:55,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 685 transitions. [2020-11-11 21:30:55,050 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 685 transitions. Word has length 14 [2020-11-11 21:30:55,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:30:55,051 INFO L481 AbstractCegarLoop]: Abstraction has 251 states and 685 transitions. [2020-11-11 21:30:55,051 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 21:30:55,051 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 685 transitions. [2020-11-11 21:30:55,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:30:55,051 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:30:55,051 INFO L494 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:30:55,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2020-11-11 21:30:55,252 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:30:55,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:30:55,253 INFO L82 PathProgramCache]: Analyzing trace with hash -285648607, now seen corresponding path program 61 times [2020-11-11 21:30:55,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:30:55,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892548710] [2020-11-11 21:30:55,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:30:55,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:30:55,466 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 21:30:55,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892548710] [2020-11-11 21:30:55,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005495703] [2020-11-11 21:30:55,467 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 21:30:55,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:30:55,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:30:55,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:30:55,834 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:30:55,873 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 21:30:55,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:30:55,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:30:55,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516894311] [2020-11-11 21:30:55,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:30:55,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:30:55,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:30:55,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:30:55,874 INFO L87 Difference]: Start difference. First operand 251 states and 685 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 21:30:57,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:30:57,497 INFO L93 Difference]: Finished difference Result 301 states and 775 transitions. [2020-11-11 21:30:57,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-11 21:30:57,499 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 21:30:57,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:30:57,502 INFO L225 Difference]: With dead ends: 301 [2020-11-11 21:30:57,502 INFO L226 Difference]: Without dead ends: 296 [2020-11-11 21:30:57,502 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=422, Invalid=1218, Unknown=0, NotChecked=0, Total=1640 [2020-11-11 21:30:57,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2020-11-11 21:30:57,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 250. [2020-11-11 21:30:57,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.714859437751004) internal successors, (676), 249 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:30:57,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 676 transitions. [2020-11-11 21:30:57,507 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 676 transitions. Word has length 14 [2020-11-11 21:30:57,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:30:57,507 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 676 transitions. [2020-11-11 21:30:57,507 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 21:30:57,507 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 676 transitions. [2020-11-11 21:30:57,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:30:57,508 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:30:57,508 INFO L494 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:30:57,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:30:57,715 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:30:57,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:30:57,716 INFO L82 PathProgramCache]: Analyzing trace with hash -284725086, now seen corresponding path program 62 times [2020-11-11 21:30:57,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:30:57,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798415378] [2020-11-11 21:30:57,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:30:57,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:30:57,982 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 21:30:57,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798415378] [2020-11-11 21:30:57,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005693103] [2020-11-11 21:30:57,983 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 21:30:58,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:30:58,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:30:58,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:30:58,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:30:58,422 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:30:58,531 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 21:30:58,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:30:58,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:30:58,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843822131] [2020-11-11 21:30:58,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:30:58,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:30:58,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:30:58,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:30:58,533 INFO L87 Difference]: Start difference. First operand 250 states and 676 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 21:31:01,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:31:01,927 INFO L93 Difference]: Finished difference Result 413 states and 1040 transitions. [2020-11-11 21:31:01,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-11-11 21:31:01,930 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 21:31:01,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:31:01,933 INFO L225 Difference]: With dead ends: 413 [2020-11-11 21:31:01,933 INFO L226 Difference]: Without dead ends: 405 [2020-11-11 21:31:01,934 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=674, Invalid=1978, Unknown=0, NotChecked=0, Total=2652 [2020-11-11 21:31:01,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2020-11-11 21:31:01,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 253. [2020-11-11 21:31:01,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 2.742063492063492) internal successors, (691), 252 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:01,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 691 transitions. [2020-11-11 21:31:01,939 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 691 transitions. Word has length 14 [2020-11-11 21:31:01,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:31:01,939 INFO L481 AbstractCegarLoop]: Abstraction has 253 states and 691 transitions. [2020-11-11 21:31:01,939 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 21:31:01,939 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 691 transitions. [2020-11-11 21:31:01,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:31:01,940 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:31:01,940 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:31:02,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2020-11-11 21:31:02,141 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:31:02,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:31:02,141 INFO L82 PathProgramCache]: Analyzing trace with hash -284724125, now seen corresponding path program 63 times [2020-11-11 21:31:02,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:31:02,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695024037] [2020-11-11 21:31:02,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:31:02,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:31:02,402 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 21:31:02,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695024037] [2020-11-11 21:31:02,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269648140] [2020-11-11 21:31:02,402 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 21:31:02,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-11 21:31:02,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:31:02,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:31:02,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:31:02,915 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:31:03,070 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 21:31:03,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:31:03,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:31:03,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338744432] [2020-11-11 21:31:03,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:31:03,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:31:03,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:31:03,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:31:03,072 INFO L87 Difference]: Start difference. First operand 253 states and 691 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 21:31:05,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:31:05,992 INFO L93 Difference]: Finished difference Result 450 states and 1157 transitions. [2020-11-11 21:31:05,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-11 21:31:05,995 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 21:31:05,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:31:05,998 INFO L225 Difference]: With dead ends: 450 [2020-11-11 21:31:05,998 INFO L226 Difference]: Without dead ends: 442 [2020-11-11 21:31:05,999 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=510, Invalid=1470, Unknown=0, NotChecked=0, Total=1980 [2020-11-11 21:31:06,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2020-11-11 21:31:06,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 256. [2020-11-11 21:31:06,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 2.768627450980392) internal successors, (706), 255 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:06,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 706 transitions. [2020-11-11 21:31:06,004 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 706 transitions. Word has length 14 [2020-11-11 21:31:06,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:31:06,005 INFO L481 AbstractCegarLoop]: Abstraction has 256 states and 706 transitions. [2020-11-11 21:31:06,005 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 21:31:06,005 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 706 transitions. [2020-11-11 21:31:06,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:31:06,005 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:31:06,005 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:31:06,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:31:06,206 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:31:06,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:31:06,207 INFO L82 PathProgramCache]: Analyzing trace with hash -284695295, now seen corresponding path program 64 times [2020-11-11 21:31:06,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:31:06,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808243799] [2020-11-11 21:31:06,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:31:06,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:31:06,443 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 21:31:06,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808243799] [2020-11-11 21:31:06,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246295809] [2020-11-11 21:31:06,444 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 21:31:06,489 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 21:31:06,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:31:06,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:31:06,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:31:06,921 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:31:07,030 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 21:31:07,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:31:07,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:31:07,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365787751] [2020-11-11 21:31:07,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:31:07,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:31:07,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:31:07,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:31:07,032 INFO L87 Difference]: Start difference. First operand 256 states and 706 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 21:31:10,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:31:10,614 INFO L93 Difference]: Finished difference Result 437 states and 1119 transitions. [2020-11-11 21:31:10,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-11-11 21:31:10,618 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 21:31:10,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:31:10,622 INFO L225 Difference]: With dead ends: 437 [2020-11-11 21:31:10,622 INFO L226 Difference]: Without dead ends: 429 [2020-11-11 21:31:10,623 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=644, Invalid=1806, Unknown=0, NotChecked=0, Total=2450 [2020-11-11 21:31:10,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2020-11-11 21:31:10,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 257. [2020-11-11 21:31:10,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 2.77734375) internal successors, (711), 256 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:10,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 711 transitions. [2020-11-11 21:31:10,630 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 711 transitions. Word has length 14 [2020-11-11 21:31:10,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:31:10,630 INFO L481 AbstractCegarLoop]: Abstraction has 257 states and 711 transitions. [2020-11-11 21:31:10,630 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 21:31:10,631 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 711 transitions. [2020-11-11 21:31:10,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:31:10,631 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:31:10,631 INFO L494 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:31:10,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-11-11 21:31:10,839 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:31:10,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:31:10,839 INFO L82 PathProgramCache]: Analyzing trace with hash -257019456, now seen corresponding path program 65 times [2020-11-11 21:31:10,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:31:10,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064861549] [2020-11-11 21:31:10,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:31:10,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:31:11,072 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 21:31:11,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064861549] [2020-11-11 21:31:11,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604756896] [2020-11-11 21:31:11,072 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 21:31:11,119 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:31:11,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:31:11,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:31:11,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:31:11,471 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:31:11,511 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 21:31:11,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:31:11,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:31:11,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123528914] [2020-11-11 21:31:11,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:31:11,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:31:11,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:31:11,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:31:11,512 INFO L87 Difference]: Start difference. First operand 257 states and 711 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 21:31:14,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:31:14,057 INFO L93 Difference]: Finished difference Result 423 states and 1085 transitions. [2020-11-11 21:31:14,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-11-11 21:31:14,060 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 21:31:14,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:31:14,063 INFO L225 Difference]: With dead ends: 423 [2020-11-11 21:31:14,063 INFO L226 Difference]: Without dead ends: 415 [2020-11-11 21:31:14,064 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=703, Invalid=2159, Unknown=0, NotChecked=0, Total=2862 [2020-11-11 21:31:14,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2020-11-11 21:31:14,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 263. [2020-11-11 21:31:14,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.8282442748091605) internal successors, (741), 262 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:14,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 741 transitions. [2020-11-11 21:31:14,072 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 741 transitions. Word has length 14 [2020-11-11 21:31:14,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:31:14,072 INFO L481 AbstractCegarLoop]: Abstraction has 263 states and 741 transitions. [2020-11-11 21:31:14,072 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 21:31:14,072 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 741 transitions. [2020-11-11 21:31:14,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:31:14,073 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:31:14,073 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:31:14,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:31:14,288 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:31:14,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:31:14,288 INFO L82 PathProgramCache]: Analyzing trace with hash -257018495, now seen corresponding path program 66 times [2020-11-11 21:31:14,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:31:14,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665940556] [2020-11-11 21:31:14,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:31:14,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:31:14,546 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 21:31:14,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665940556] [2020-11-11 21:31:14,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785095549] [2020-11-11 21:31:14,546 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 21:31:14,593 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-11 21:31:14,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:31:14,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:31:14,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:31:14,969 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:31:15,075 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 21:31:15,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:31:15,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:31:15,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44429763] [2020-11-11 21:31:15,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:31:15,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:31:15,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:31:15,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:31:15,078 INFO L87 Difference]: Start difference. First operand 263 states and 741 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 21:31:17,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:31:17,824 INFO L93 Difference]: Finished difference Result 449 states and 1164 transitions. [2020-11-11 21:31:17,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-11-11 21:31:17,827 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 21:31:17,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:31:17,829 INFO L225 Difference]: With dead ends: 449 [2020-11-11 21:31:17,829 INFO L226 Difference]: Without dead ends: 441 [2020-11-11 21:31:17,829 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=562, Invalid=1694, Unknown=0, NotChecked=0, Total=2256 [2020-11-11 21:31:17,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2020-11-11 21:31:17,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 264. [2020-11-11 21:31:17,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.821292775665399) internal successors, (742), 263 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:17,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 742 transitions. [2020-11-11 21:31:17,835 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 742 transitions. Word has length 14 [2020-11-11 21:31:17,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:31:17,835 INFO L481 AbstractCegarLoop]: Abstraction has 264 states and 742 transitions. [2020-11-11 21:31:17,835 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 21:31:17,835 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 742 transitions. [2020-11-11 21:31:17,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:31:17,836 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:31:17,836 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:31:18,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2020-11-11 21:31:18,045 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:31:18,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:31:18,045 INFO L82 PathProgramCache]: Analyzing trace with hash -256989665, now seen corresponding path program 67 times [2020-11-11 21:31:18,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:31:18,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626769807] [2020-11-11 21:31:18,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:31:18,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:31:18,296 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 21:31:18,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626769807] [2020-11-11 21:31:18,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061997678] [2020-11-11 21:31:18,296 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 21:31:18,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:31:18,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:31:18,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:31:18,701 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:31:18,739 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 21:31:18,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:31:18,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:31:18,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859748435] [2020-11-11 21:31:18,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:31:18,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:31:18,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:31:18,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:31:18,741 INFO L87 Difference]: Start difference. First operand 264 states and 742 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 21:31:20,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:31:20,827 INFO L93 Difference]: Finished difference Result 445 states and 1150 transitions. [2020-11-11 21:31:20,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-11 21:31:20,830 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 21:31:20,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:31:20,832 INFO L225 Difference]: With dead ends: 445 [2020-11-11 21:31:20,832 INFO L226 Difference]: Without dead ends: 437 [2020-11-11 21:31:20,832 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=482, Invalid=1410, Unknown=0, NotChecked=0, Total=1892 [2020-11-11 21:31:20,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2020-11-11 21:31:20,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 263. [2020-11-11 21:31:20,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.812977099236641) internal successors, (737), 262 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:20,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 737 transitions. [2020-11-11 21:31:20,840 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 737 transitions. Word has length 14 [2020-11-11 21:31:20,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:31:20,840 INFO L481 AbstractCegarLoop]: Abstraction has 263 states and 737 transitions. [2020-11-11 21:31:20,841 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 21:31:20,841 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 737 transitions. [2020-11-11 21:31:20,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:31:20,841 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:31:20,841 INFO L494 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:31:21,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:31:21,050 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:31:21,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:31:21,050 INFO L82 PathProgramCache]: Analyzing trace with hash -256988704, now seen corresponding path program 68 times [2020-11-11 21:31:21,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:31:21,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121643733] [2020-11-11 21:31:21,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:31:21,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:31:21,293 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 21:31:21,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121643733] [2020-11-11 21:31:21,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366651543] [2020-11-11 21:31:21,294 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 21:31:21,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:31:21,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:31:21,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:31:21,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:31:21,695 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:31:21,743 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 21:31:21,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:31:21,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:31:21,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430495885] [2020-11-11 21:31:21,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:31:21,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:31:21,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:31:21,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:31:21,745 INFO L87 Difference]: Start difference. First operand 263 states and 737 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 21:31:24,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:31:24,423 INFO L93 Difference]: Finished difference Result 448 states and 1151 transitions. [2020-11-11 21:31:24,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-11-11 21:31:24,426 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 21:31:24,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:31:24,428 INFO L225 Difference]: With dead ends: 448 [2020-11-11 21:31:24,428 INFO L226 Difference]: Without dead ends: 440 [2020-11-11 21:31:24,428 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=625, Invalid=1925, Unknown=0, NotChecked=0, Total=2550 [2020-11-11 21:31:24,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2020-11-11 21:31:24,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 252. [2020-11-11 21:31:24,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.7928286852589643) internal successors, (701), 251 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:24,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 701 transitions. [2020-11-11 21:31:24,434 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 701 transitions. Word has length 14 [2020-11-11 21:31:24,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:31:24,434 INFO L481 AbstractCegarLoop]: Abstraction has 252 states and 701 transitions. [2020-11-11 21:31:24,434 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 21:31:24,434 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 701 transitions. [2020-11-11 21:31:24,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:31:24,435 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:31:24,435 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:31:24,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:31:24,636 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:31:24,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:31:24,636 INFO L82 PathProgramCache]: Analyzing trace with hash -256095935, now seen corresponding path program 69 times [2020-11-11 21:31:24,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:31:24,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332612031] [2020-11-11 21:31:24,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:31:24,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:31:24,904 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 21:31:24,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332612031] [2020-11-11 21:31:24,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340580301] [2020-11-11 21:31:24,905 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 21:31:24,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-11 21:31:24,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:31:24,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:31:24,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:31:25,336 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:31:25,384 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 21:31:25,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:31:25,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:31:25,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322448183] [2020-11-11 21:31:25,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:31:25,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:31:25,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:31:25,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:31:25,386 INFO L87 Difference]: Start difference. First operand 252 states and 701 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 21:31:28,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:31:28,352 INFO L93 Difference]: Finished difference Result 403 states and 1041 transitions. [2020-11-11 21:31:28,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-11-11 21:31:28,355 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 21:31:28,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:31:28,357 INFO L225 Difference]: With dead ends: 403 [2020-11-11 21:31:28,357 INFO L226 Difference]: Without dead ends: 395 [2020-11-11 21:31:28,357 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=610, Invalid=1840, Unknown=0, NotChecked=0, Total=2450 [2020-11-11 21:31:28,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2020-11-11 21:31:28,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 250. [2020-11-11 21:31:28,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.7751004016064256) internal successors, (691), 249 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:28,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 691 transitions. [2020-11-11 21:31:28,362 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 691 transitions. Word has length 14 [2020-11-11 21:31:28,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:31:28,363 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 691 transitions. [2020-11-11 21:31:28,363 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 21:31:28,363 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 691 transitions. [2020-11-11 21:31:28,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:31:28,364 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:31:28,364 INFO L494 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:31:28,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:31:28,577 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:31:28,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:31:28,578 INFO L82 PathProgramCache]: Analyzing trace with hash -536472019, now seen corresponding path program 70 times [2020-11-11 21:31:28,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:31:28,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603953671] [2020-11-11 21:31:28,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:31:28,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:31:28,902 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 21:31:28,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603953671] [2020-11-11 21:31:28,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339862860] [2020-11-11 21:31:28,903 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:31:28,969 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 21:31:28,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:31:28,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:31:28,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:31:29,589 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 21:31:29,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:31:29,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:31:29,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881142530] [2020-11-11 21:31:29,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:31:29,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:31:29,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:31:29,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:31:29,591 INFO L87 Difference]: Start difference. First operand 250 states and 691 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 21:31:30,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:31:30,344 INFO L93 Difference]: Finished difference Result 308 states and 811 transitions. [2020-11-11 21:31:30,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-11 21:31:30,348 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 21:31:30,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:31:30,349 INFO L225 Difference]: With dead ends: 308 [2020-11-11 21:31:30,349 INFO L226 Difference]: Without dead ends: 306 [2020-11-11 21:31:30,349 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-11-11 21:31:30,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-11-11 21:31:30,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 258. [2020-11-11 21:31:30,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.782101167315175) internal successors, (715), 257 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:30,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 715 transitions. [2020-11-11 21:31:30,356 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 715 transitions. Word has length 14 [2020-11-11 21:31:30,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:31:30,356 INFO L481 AbstractCegarLoop]: Abstraction has 258 states and 715 transitions. [2020-11-11 21:31:30,356 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 21:31:30,356 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 715 transitions. [2020-11-11 21:31:30,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:31:30,357 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:31:30,357 INFO L494 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:31:30,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:31:30,571 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:31:30,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:31:30,572 INFO L82 PathProgramCache]: Analyzing trace with hash -536471058, now seen corresponding path program 71 times [2020-11-11 21:31:30,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:31:30,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693568053] [2020-11-11 21:31:30,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:31:30,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:31:30,844 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 21:31:30,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693568053] [2020-11-11 21:31:30,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762340670] [2020-11-11 21:31:30,845 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 21:31:30,893 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-11 21:31:30,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:31:30,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:31:30,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:31:31,405 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 21:31:31,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:31:31,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:31:31,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431674964] [2020-11-11 21:31:31,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:31:31,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:31:31,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:31:31,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:31:31,406 INFO L87 Difference]: Start difference. First operand 258 states and 715 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 21:31:32,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:31:32,026 INFO L93 Difference]: Finished difference Result 327 states and 846 transitions. [2020-11-11 21:31:32,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-11 21:31:32,029 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 21:31:32,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:31:32,030 INFO L225 Difference]: With dead ends: 327 [2020-11-11 21:31:32,030 INFO L226 Difference]: Without dead ends: 325 [2020-11-11 21:31:32,030 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2020-11-11 21:31:32,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2020-11-11 21:31:32,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 258. [2020-11-11 21:31:32,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.782101167315175) internal successors, (715), 257 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:32,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 715 transitions. [2020-11-11 21:31:32,035 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 715 transitions. Word has length 14 [2020-11-11 21:31:32,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:31:32,035 INFO L481 AbstractCegarLoop]: Abstraction has 258 states and 715 transitions. [2020-11-11 21:31:32,035 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 21:31:32,036 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 715 transitions. [2020-11-11 21:31:32,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:31:32,036 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:31:32,037 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:31:32,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:31:32,248 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:31:32,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:31:32,248 INFO L82 PathProgramCache]: Analyzing trace with hash -536441267, now seen corresponding path program 72 times [2020-11-11 21:31:32,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:31:32,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079651472] [2020-11-11 21:31:32,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:31:32,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:31:32,471 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 21:31:32,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079651472] [2020-11-11 21:31:32,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106480992] [2020-11-11 21:31:32,472 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 21:31:32,521 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-11-11 21:31:32,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:31:32,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:31:32,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:31:33,053 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 21:31:33,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:31:33,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:31:33,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693058643] [2020-11-11 21:31:33,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:31:33,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:31:33,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:31:33,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:31:33,055 INFO L87 Difference]: Start difference. First operand 258 states and 715 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 21:31:33,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:31:33,860 INFO L93 Difference]: Finished difference Result 343 states and 880 transitions. [2020-11-11 21:31:33,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-11 21:31:33,863 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 21:31:33,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:31:33,865 INFO L225 Difference]: With dead ends: 343 [2020-11-11 21:31:33,865 INFO L226 Difference]: Without dead ends: 341 [2020-11-11 21:31:33,865 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2020-11-11 21:31:33,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2020-11-11 21:31:33,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 258. [2020-11-11 21:31:33,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.782101167315175) internal successors, (715), 257 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:33,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 715 transitions. [2020-11-11 21:31:33,871 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 715 transitions. Word has length 14 [2020-11-11 21:31:33,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:31:33,872 INFO L481 AbstractCegarLoop]: Abstraction has 258 states and 715 transitions. [2020-11-11 21:31:33,872 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 21:31:33,872 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 715 transitions. [2020-11-11 21:31:33,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:31:33,872 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:31:33,873 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:31:34,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:31:34,076 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:31:34,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:31:34,076 INFO L82 PathProgramCache]: Analyzing trace with hash -507813077, now seen corresponding path program 73 times [2020-11-11 21:31:34,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:31:34,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688860985] [2020-11-11 21:31:34,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:31:34,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:31:34,314 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 21:31:34,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688860985] [2020-11-11 21:31:34,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704642498] [2020-11-11 21:31:34,315 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 21:31:34,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:31:34,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:31:34,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:31:34,822 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 21:31:34,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:31:34,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:31:34,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664869308] [2020-11-11 21:31:34,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:31:34,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:31:34,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:31:34,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:31:34,823 INFO L87 Difference]: Start difference. First operand 258 states and 715 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 21:31:35,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:31:35,572 INFO L93 Difference]: Finished difference Result 354 states and 899 transitions. [2020-11-11 21:31:35,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-11 21:31:35,575 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 21:31:35,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:31:35,576 INFO L225 Difference]: With dead ends: 354 [2020-11-11 21:31:35,577 INFO L226 Difference]: Without dead ends: 352 [2020-11-11 21:31:35,577 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2020-11-11 21:31:35,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2020-11-11 21:31:35,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 261. [2020-11-11 21:31:35,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 2.7846153846153845) internal successors, (724), 260 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:35,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 724 transitions. [2020-11-11 21:31:35,589 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 724 transitions. Word has length 14 [2020-11-11 21:31:35,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:31:35,589 INFO L481 AbstractCegarLoop]: Abstraction has 261 states and 724 transitions. [2020-11-11 21:31:35,589 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 21:31:35,589 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 724 transitions. [2020-11-11 21:31:35,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:31:35,590 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:31:35,590 INFO L494 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:31:35,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:31:35,791 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:31:35,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:31:35,792 INFO L82 PathProgramCache]: Analyzing trace with hash -506888595, now seen corresponding path program 74 times [2020-11-11 21:31:35,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:31:35,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452390837] [2020-11-11 21:31:35,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:31:35,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:31:36,022 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 21:31:36,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452390837] [2020-11-11 21:31:36,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698750510] [2020-11-11 21:31:36,023 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 21:31:36,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:31:36,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:31:36,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:31:36,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:31:36,539 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 21:31:36,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:31:36,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:31:36,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105325338] [2020-11-11 21:31:36,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:31:36,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:31:36,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:31:36,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:31:36,540 INFO L87 Difference]: Start difference. First operand 261 states and 724 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 21:31:37,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:31:37,241 INFO L93 Difference]: Finished difference Result 336 states and 861 transitions. [2020-11-11 21:31:37,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-11 21:31:37,244 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 21:31:37,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:31:37,246 INFO L225 Difference]: With dead ends: 336 [2020-11-11 21:31:37,246 INFO L226 Difference]: Without dead ends: 334 [2020-11-11 21:31:37,246 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2020-11-11 21:31:37,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-11-11 21:31:37,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 260. [2020-11-11 21:31:37,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 2.7683397683397684) internal successors, (717), 259 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:37,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 717 transitions. [2020-11-11 21:31:37,252 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 717 transitions. Word has length 14 [2020-11-11 21:31:37,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:31:37,253 INFO L481 AbstractCegarLoop]: Abstraction has 260 states and 717 transitions. [2020-11-11 21:31:37,253 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 21:31:37,253 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 717 transitions. [2020-11-11 21:31:37,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:31:37,253 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:31:37,253 INFO L494 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:31:37,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2020-11-11 21:31:37,454 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:31:37,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:31:37,455 INFO L82 PathProgramCache]: Analyzing trace with hash -885548369, now seen corresponding path program 75 times [2020-11-11 21:31:37,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:31:37,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465831438] [2020-11-11 21:31:37,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:31:37,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:31:37,709 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 21:31:37,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465831438] [2020-11-11 21:31:37,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576306607] [2020-11-11 21:31:37,709 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 21:31:37,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-11 21:31:37,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:31:37,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:31:37,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:31:38,158 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:31:38,281 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 21:31:38,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:31:38,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:31:38,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88406114] [2020-11-11 21:31:38,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:31:38,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:31:38,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:31:38,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:31:38,283 INFO L87 Difference]: Start difference. First operand 260 states and 717 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 21:31:40,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:31:40,414 INFO L93 Difference]: Finished difference Result 352 states and 891 transitions. [2020-11-11 21:31:40,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 21:31:40,416 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 21:31:40,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:31:40,418 INFO L225 Difference]: With dead ends: 352 [2020-11-11 21:31:40,418 INFO L226 Difference]: Without dead ends: 347 [2020-11-11 21:31:40,418 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=415, Invalid=1067, Unknown=0, NotChecked=0, Total=1482 [2020-11-11 21:31:40,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2020-11-11 21:31:40,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 262. [2020-11-11 21:31:40,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 2.7701149425287355) internal successors, (723), 261 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:40,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 723 transitions. [2020-11-11 21:31:40,424 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 723 transitions. Word has length 14 [2020-11-11 21:31:40,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:31:40,424 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 723 transitions. [2020-11-11 21:31:40,424 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 21:31:40,424 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 723 transitions. [2020-11-11 21:31:40,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:31:40,425 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:31:40,425 INFO L494 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:31:40,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:31:40,626 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:31:40,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:31:40,626 INFO L82 PathProgramCache]: Analyzing trace with hash -885519539, now seen corresponding path program 76 times [2020-11-11 21:31:40,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:31:40,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109675359] [2020-11-11 21:31:40,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:31:40,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:31:40,901 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 21:31:40,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109675359] [2020-11-11 21:31:40,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370279596] [2020-11-11 21:31:40,901 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 21:31:40,950 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 21:31:40,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:31:40,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:31:40,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:31:41,388 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:31:41,493 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 21:31:41,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:31:41,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:31:41,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079956514] [2020-11-11 21:31:41,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:31:41,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:31:41,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:31:41,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:31:41,496 INFO L87 Difference]: Start difference. First operand 262 states and 723 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 21:31:44,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:31:44,203 INFO L93 Difference]: Finished difference Result 363 states and 917 transitions. [2020-11-11 21:31:44,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-11 21:31:44,207 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 21:31:44,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:31:44,208 INFO L225 Difference]: With dead ends: 363 [2020-11-11 21:31:44,208 INFO L226 Difference]: Without dead ends: 358 [2020-11-11 21:31:44,209 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=481, Invalid=1159, Unknown=0, NotChecked=0, Total=1640 [2020-11-11 21:31:44,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2020-11-11 21:31:44,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 263. [2020-11-11 21:31:44,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.7786259541984735) internal successors, (728), 262 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:44,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 728 transitions. [2020-11-11 21:31:44,214 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 728 transitions. Word has length 14 [2020-11-11 21:31:44,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:31:44,214 INFO L481 AbstractCegarLoop]: Abstraction has 263 states and 728 transitions. [2020-11-11 21:31:44,215 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 21:31:44,215 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 728 transitions. [2020-11-11 21:31:44,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:31:44,215 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:31:44,215 INFO L494 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:31:44,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2020-11-11 21:31:44,416 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:31:44,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:31:44,417 INFO L82 PathProgramCache]: Analyzing trace with hash -885518578, now seen corresponding path program 77 times [2020-11-11 21:31:44,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:31:44,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925949948] [2020-11-11 21:31:44,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:31:44,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:31:44,672 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 21:31:44,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925949948] [2020-11-11 21:31:44,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935069338] [2020-11-11 21:31:44,673 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 21:31:44,722 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-11 21:31:44,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:31:44,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:31:44,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:31:45,149 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:31:45,282 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 21:31:45,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:31:45,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:31:45,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690503784] [2020-11-11 21:31:45,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:31:45,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:31:45,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:31:45,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:31:45,284 INFO L87 Difference]: Start difference. First operand 263 states and 728 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 21:31:47,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:31:47,701 INFO L93 Difference]: Finished difference Result 376 states and 940 transitions. [2020-11-11 21:31:47,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-11 21:31:47,704 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 21:31:47,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:31:47,705 INFO L225 Difference]: With dead ends: 376 [2020-11-11 21:31:47,705 INFO L226 Difference]: Without dead ends: 371 [2020-11-11 21:31:47,706 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=468, Invalid=1172, Unknown=0, NotChecked=0, Total=1640 [2020-11-11 21:31:47,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2020-11-11 21:31:47,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 260. [2020-11-11 21:31:47,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 2.7683397683397684) internal successors, (717), 259 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:47,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 717 transitions. [2020-11-11 21:31:47,711 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 717 transitions. Word has length 14 [2020-11-11 21:31:47,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:31:47,712 INFO L481 AbstractCegarLoop]: Abstraction has 260 states and 717 transitions. [2020-11-11 21:31:47,712 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 21:31:47,712 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 717 transitions. [2020-11-11 21:31:47,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:31:47,712 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:31:47,712 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:31:47,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:31:47,913 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:31:47,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:31:47,914 INFO L82 PathProgramCache]: Analyzing trace with hash -884595057, now seen corresponding path program 78 times [2020-11-11 21:31:47,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:31:47,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709216245] [2020-11-11 21:31:47,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:31:47,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:31:48,157 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 21:31:48,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709216245] [2020-11-11 21:31:48,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510189008] [2020-11-11 21:31:48,158 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 21:31:48,205 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-11-11 21:31:48,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:31:48,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:31:48,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:31:48,658 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:31:48,807 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 21:31:48,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:31:48,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:31:48,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446345440] [2020-11-11 21:31:48,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:31:48,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:31:48,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:31:48,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:31:48,810 INFO L87 Difference]: Start difference. First operand 260 states and 717 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 21:31:51,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:31:51,681 INFO L93 Difference]: Finished difference Result 399 states and 992 transitions. [2020-11-11 21:31:51,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-11 21:31:51,684 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 21:31:51,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:31:51,685 INFO L225 Difference]: With dead ends: 399 [2020-11-11 21:31:51,685 INFO L226 Difference]: Without dead ends: 391 [2020-11-11 21:31:51,685 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=570, Invalid=1410, Unknown=0, NotChecked=0, Total=1980 [2020-11-11 21:31:51,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2020-11-11 21:31:51,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 249. [2020-11-11 21:31:51,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 2.725806451612903) internal successors, (676), 248 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:51,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 676 transitions. [2020-11-11 21:31:51,691 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 676 transitions. Word has length 14 [2020-11-11 21:31:51,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:31:51,691 INFO L481 AbstractCegarLoop]: Abstraction has 249 states and 676 transitions. [2020-11-11 21:31:51,691 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 21:31:51,691 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 676 transitions. [2020-11-11 21:31:51,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:31:51,692 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:31:51,692 INFO L494 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:31:51,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:31:51,902 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:31:51,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:31:51,903 INFO L82 PathProgramCache]: Analyzing trace with hash 2877872, now seen corresponding path program 79 times [2020-11-11 21:31:51,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:31:51,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461003738] [2020-11-11 21:31:51,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:31:51,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:31:52,226 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 21:31:52,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461003738] [2020-11-11 21:31:52,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270952915] [2020-11-11 21:31:52,227 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 21:31:52,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:31:52,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:31:52,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:31:52,676 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:31:52,716 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 21:31:52,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:31:52,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:31:52,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242001391] [2020-11-11 21:31:52,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:31:52,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:31:52,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:31:52,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:31:52,718 INFO L87 Difference]: Start difference. First operand 249 states and 676 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 21:31:55,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:31:55,464 INFO L93 Difference]: Finished difference Result 399 states and 1014 transitions. [2020-11-11 21:31:55,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-11-11 21:31:55,467 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 21:31:55,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:31:55,469 INFO L225 Difference]: With dead ends: 399 [2020-11-11 21:31:55,469 INFO L226 Difference]: Without dead ends: 394 [2020-11-11 21:31:55,470 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=625, Invalid=1925, Unknown=0, NotChecked=0, Total=2550 [2020-11-11 21:31:55,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2020-11-11 21:31:55,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 250. [2020-11-11 21:31:55,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.7349397590361444) internal successors, (681), 249 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:55,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 681 transitions. [2020-11-11 21:31:55,475 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 681 transitions. Word has length 14 [2020-11-11 21:31:55,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:31:55,475 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 681 transitions. [2020-11-11 21:31:55,475 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 21:31:55,475 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 681 transitions. [2020-11-11 21:31:55,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:31:55,475 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:31:55,476 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:31:55,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:31:55,676 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:31:55,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:31:55,677 INFO L82 PathProgramCache]: Analyzing trace with hash 2878833, now seen corresponding path program 80 times [2020-11-11 21:31:55,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:31:55,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158494495] [2020-11-11 21:31:55,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:31:55,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:31:55,947 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 21:31:55,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158494495] [2020-11-11 21:31:55,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614496691] [2020-11-11 21:31:55,948 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 21:31:55,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:31:55,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:31:55,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:31:56,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:31:56,372 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:31:56,410 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 21:31:56,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:31:56,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:31:56,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754619099] [2020-11-11 21:31:56,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:31:56,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:31:56,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:31:56,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:31:56,412 INFO L87 Difference]: Start difference. First operand 250 states and 681 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 21:31:58,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:31:58,679 INFO L93 Difference]: Finished difference Result 433 states and 1097 transitions. [2020-11-11 21:31:58,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-11 21:31:58,682 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 21:31:58,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:31:58,684 INFO L225 Difference]: With dead ends: 433 [2020-11-11 21:31:58,684 INFO L226 Difference]: Without dead ends: 425 [2020-11-11 21:31:58,684 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=482, Invalid=1410, Unknown=0, NotChecked=0, Total=1892 [2020-11-11 21:31:58,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2020-11-11 21:31:58,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 247. [2020-11-11 21:31:58,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.7154471544715446) internal successors, (668), 246 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:31:58,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 668 transitions. [2020-11-11 21:31:58,689 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 668 transitions. Word has length 14 [2020-11-11 21:31:58,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:31:58,689 INFO L481 AbstractCegarLoop]: Abstraction has 247 states and 668 transitions. [2020-11-11 21:31:58,689 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 21:31:58,690 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 668 transitions. [2020-11-11 21:31:58,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:31:58,690 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:31:58,690 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:31:58,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:31:58,891 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:31:58,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:31:58,892 INFO L82 PathProgramCache]: Analyzing trace with hash 2907663, now seen corresponding path program 81 times [2020-11-11 21:31:58,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:31:58,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874347036] [2020-11-11 21:31:58,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:31:58,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:31:59,199 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 21:31:59,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874347036] [2020-11-11 21:31:59,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010527508] [2020-11-11 21:31:59,200 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 21:31:59,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-11 21:31:59,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:31:59,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:31:59,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:31:59,647 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:31:59,699 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 21:31:59,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:31:59,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:31:59,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463671266] [2020-11-11 21:31:59,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:31:59,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:31:59,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:31:59,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:31:59,700 INFO L87 Difference]: Start difference. First operand 247 states and 668 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 21:32:02,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:32:02,716 INFO L93 Difference]: Finished difference Result 424 states and 1073 transitions. [2020-11-11 21:32:02,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-11-11 21:32:02,720 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 21:32:02,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:32:02,721 INFO L225 Difference]: With dead ends: 424 [2020-11-11 21:32:02,721 INFO L226 Difference]: Without dead ends: 416 [2020-11-11 21:32:02,722 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=562, Invalid=1694, Unknown=0, NotChecked=0, Total=2256 [2020-11-11 21:32:02,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2020-11-11 21:32:02,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 245. [2020-11-11 21:32:02,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.69672131147541) internal successors, (658), 244 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:32:02,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 658 transitions. [2020-11-11 21:32:02,727 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 658 transitions. Word has length 14 [2020-11-11 21:32:02,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:32:02,728 INFO L481 AbstractCegarLoop]: Abstraction has 245 states and 658 transitions. [2020-11-11 21:32:02,728 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 21:32:02,728 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 658 transitions. [2020-11-11 21:32:02,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:32:02,728 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:32:02,728 INFO L494 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:32:02,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:32:02,929 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:32:02,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:32:02,930 INFO L82 PathProgramCache]: Analyzing trace with hash 31537775, now seen corresponding path program 82 times [2020-11-11 21:32:02,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:32:02,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346498334] [2020-11-11 21:32:02,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:32:02,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:32:03,207 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 21:32:03,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346498334] [2020-11-11 21:32:03,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337498611] [2020-11-11 21:32:03,207 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 21:32:03,254 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 21:32:03,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:32:03,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:32:03,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:32:03,605 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:32:03,654 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 21:32:03,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:32:03,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:32:03,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065839121] [2020-11-11 21:32:03,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:32:03,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:32:03,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:32:03,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:32:03,656 INFO L87 Difference]: Start difference. First operand 245 states and 658 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 21:32:05,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:32:05,608 INFO L93 Difference]: Finished difference Result 342 states and 839 transitions. [2020-11-11 21:32:05,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-11 21:32:05,611 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 21:32:05,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:32:05,612 INFO L225 Difference]: With dead ends: 342 [2020-11-11 21:32:05,612 INFO L226 Difference]: Without dead ends: 337 [2020-11-11 21:32:05,613 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=406, Invalid=1154, Unknown=0, NotChecked=0, Total=1560 [2020-11-11 21:32:05,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2020-11-11 21:32:05,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 240. [2020-11-11 21:32:05,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.6317991631799162) internal successors, (629), 239 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:32:05,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 629 transitions. [2020-11-11 21:32:05,620 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 629 transitions. Word has length 14 [2020-11-11 21:32:05,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:32:05,620 INFO L481 AbstractCegarLoop]: Abstraction has 240 states and 629 transitions. [2020-11-11 21:32:05,620 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 21:32:05,620 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 629 transitions. [2020-11-11 21:32:05,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:32:05,621 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:32:05,621 INFO L494 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:32:05,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:32:05,822 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:32:05,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:32:05,822 INFO L82 PathProgramCache]: Analyzing trace with hash 420256697, now seen corresponding path program 7 times [2020-11-11 21:32:05,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:32:05,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544775968] [2020-11-11 21:32:05,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:32:05,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:32:06,093 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 21:32:06,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544775968] [2020-11-11 21:32:06,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807211418] [2020-11-11 21:32:06,093 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 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 21:32:06,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:32:06,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-11 21:32:06,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:32:06,485 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 21:32:06,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-11 21:32:06,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 18 [2020-11-11 21:32:06,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559227117] [2020-11-11 21:32:06,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-11 21:32:06,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:32:06,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-11 21:32:06,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-11-11 21:32:06,487 INFO L87 Difference]: Start difference. First operand 240 states and 629 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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 21:32:06,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:32:06,553 INFO L93 Difference]: Finished difference Result 320 states and 851 transitions. [2020-11-11 21:32:06,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-11 21:32:06,556 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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 21:32:06,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:32:06,557 INFO L225 Difference]: With dead ends: 320 [2020-11-11 21:32:06,557 INFO L226 Difference]: Without dead ends: 312 [2020-11-11 21:32:06,557 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-11-11 21:32:06,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2020-11-11 21:32:06,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 312. [2020-11-11 21:32:06,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.688102893890675) internal successors, (836), 311 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:32:06,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 836 transitions. [2020-11-11 21:32:06,563 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 836 transitions. Word has length 14 [2020-11-11 21:32:06,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:32:06,563 INFO L481 AbstractCegarLoop]: Abstraction has 312 states and 836 transitions. [2020-11-11 21:32:06,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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 21:32:06,563 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 836 transitions. [2020-11-11 21:32:06,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-11 21:32:06,564 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:32:06,564 INFO L494 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:32:06,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2020-11-11 21:32:06,769 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:32:06,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:32:06,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1499774230, now seen corresponding path program 83 times [2020-11-11 21:32:06,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:32:06,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958103460] [2020-11-11 21:32:06,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:32:06,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:32:07,076 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 21:32:07,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958103460] [2020-11-11 21:32:07,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424590024] [2020-11-11 21:32:07,077 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 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 21:32:07,125 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-11 21:32:07,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:32:07,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 21:32:07,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:32:07,661 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:32:07,721 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 21:32:07,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:32:07,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-11-11 21:32:07,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671856715] [2020-11-11 21:32:07,722 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 21:32:07,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:32:07,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 21:32:07,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2020-11-11 21:32:07,722 INFO L87 Difference]: Start difference. First operand 312 states and 836 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 21:32:08,279 WARN L210 SmtUtils]: Removed 10 from assertion stack [2020-11-11 21:32:08,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-11 21:32:08,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:32:08,481 WARN L546 AbstractCegarLoop]: Verification canceled [2020-11-11 21:32:08,485 WARN L250 ceAbstractionStarter]: Timeout [2020-11-11 21:32:08,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.11 09:32:08 BasicIcfg [2020-11-11 21:32:08,485 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-11 21:32:08,486 INFO L168 Benchmark]: Toolchain (without parser) took 863785.29 ms. Allocated memory was 302.0 MB in the beginning and 444.6 MB in the end (delta: 142.6 MB). Free memory was 276.1 MB in the beginning and 253.0 MB in the end (delta: 23.1 MB). Peak memory consumption was 167.1 MB. Max. memory is 16.0 GB. [2020-11-11 21:32:08,486 INFO L168 Benchmark]: CDTParser took 0.23 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 21:32:08,486 INFO L168 Benchmark]: CACSL2BoogieTranslator took 735.49 ms. Allocated memory is still 302.0 MB. Free memory was 275.4 MB in the beginning and 246.6 MB in the end (delta: 28.8 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.0 GB. [2020-11-11 21:32:08,486 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.44 ms. Allocated memory is still 302.0 MB. Free memory was 246.6 MB in the beginning and 244.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2020-11-11 21:32:08,487 INFO L168 Benchmark]: Boogie Preprocessor took 37.33 ms. Allocated memory is still 302.0 MB. Free memory was 244.8 MB in the beginning and 243.6 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.0 GB. [2020-11-11 21:32:08,487 INFO L168 Benchmark]: RCFGBuilder took 708.92 ms. Allocated memory is still 302.0 MB. Free memory was 243.4 MB in the beginning and 267.3 MB in the end (delta: -23.9 MB). Peak memory consumption was 9.1 MB. Max. memory is 16.0 GB. [2020-11-11 21:32:08,487 INFO L168 Benchmark]: TraceAbstraction took 862240.21 ms. Allocated memory was 302.0 MB in the beginning and 444.6 MB in the end (delta: 142.6 MB). Free memory was 266.2 MB in the beginning and 253.0 MB in the end (delta: 13.3 MB). Peak memory consumption was 155.9 MB. Max. memory is 16.0 GB. [2020-11-11 21:32:08,489 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 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 735.49 ms. Allocated memory is still 302.0 MB. Free memory was 275.4 MB in the beginning and 246.6 MB in the end (delta: 28.8 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 46.44 ms. Allocated memory is still 302.0 MB. Free memory was 246.6 MB in the beginning and 244.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 37.33 ms. Allocated memory is still 302.0 MB. Free memory was 244.8 MB in the beginning and 243.6 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 708.92 ms. Allocated memory is still 302.0 MB. Free memory was 243.4 MB in the beginning and 267.3 MB in the end (delta: -23.9 MB). Peak memory consumption was 9.1 MB. Max. memory is 16.0 GB. * TraceAbstraction took 862240.21 ms. Allocated memory was 302.0 MB in the beginning and 444.6 MB in the end (delta: 142.6 MB). Free memory was 266.2 MB in the beginning and 253.0 MB in the end (delta: 13.3 MB). Peak memory consumption was 155.9 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 (312states) and FLOYD_HOARE automaton (currently 8 states, 19 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 40 for 17ms.. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 61 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 862.0s, OverallIterations: 98, TraceHistogramMax: 7, AutomataDifference: 778.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.2s, HoareTripleCheckerStatistics: 1454 SDtfs, 15091 SDslu, 12277 SDs, 0 SdLazy, 10487 SolverSat, 3236 SolverUnsat, 180 SolverUnknown, 0 SolverNotchecked, 361.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3412 GetRequests, 456 SyntacticMatches, 88 SemanticMatches, 2867 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 25818 ImplicationChecksByTransitivity, 451.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=312occurred in iteration=97, 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, 7510 StatesRemovedByMinimization, 95 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.7s SsaConstructionTime, 1.9s SatisfiabilityAnalysisTime, 52.8s InterpolantComputationTime, 2456 NumberOfCodeBlocks, 2456 NumberOfCodeBlocksAsserted, 298 NumberOfCheckSat, 2266 ConstructedInterpolants, 5 QuantifiedInterpolants, 312609 SizeOfPredicates, 90 NumberOfNonLiveVariables, 9494 ConjunctsInSsa, 932 ConjunctsInUnsatCore, 190 InterpolantComputations, 8 PerfectInterpolantSequences, 42/1150 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