/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench_longest-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-60655ea [2020-09-14 12:36:53,134 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-14 12:36:53,139 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-14 12:36:53,183 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-14 12:36:53,184 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-14 12:36:53,192 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-14 12:36:53,196 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-14 12:36:53,200 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-14 12:36:53,202 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-14 12:36:53,206 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-14 12:36:53,207 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-14 12:36:53,208 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-14 12:36:53,208 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-14 12:36:53,212 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-14 12:36:53,215 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-14 12:36:53,217 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-14 12:36:53,219 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-14 12:36:53,220 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-14 12:36:53,221 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-14 12:36:53,232 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-14 12:36:53,234 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-14 12:36:53,235 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-14 12:36:53,236 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-14 12:36:53,237 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-14 12:36:53,254 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-14 12:36:53,254 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-14 12:36:53,254 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-14 12:36:53,255 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-14 12:36:53,256 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-14 12:36:53,261 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-14 12:36:53,261 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-14 12:36:53,262 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-14 12:36:53,263 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-14 12:36:53,266 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-14 12:36:53,268 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-14 12:36:53,268 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-14 12:36:53,269 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-14 12:36:53,269 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-14 12:36:53,270 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-14 12:36:53,271 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-14 12:36:53,272 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-14 12:36:53,273 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-14 12:36:53,323 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-14 12:36:53,323 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-14 12:36:53,325 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-14 12:36:53,326 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-14 12:36:53,326 INFO L138 SettingsManager]: * Use SBE=true [2020-09-14 12:36:53,326 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-14 12:36:53,326 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-14 12:36:53,327 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-14 12:36:53,327 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-14 12:36:53,327 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-14 12:36:53,328 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-14 12:36:53,329 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-14 12:36:53,329 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-14 12:36:53,329 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-14 12:36:53,329 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-14 12:36:53,330 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-14 12:36:53,330 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-14 12:36:53,330 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-14 12:36:53,330 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-14 12:36:53,331 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-14 12:36:53,331 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-14 12:36:53,331 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-14 12:36:53,331 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-14 12:36:53,331 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-14 12:36:53,332 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-14 12:36:53,332 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-14 12:36:53,332 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-14 12:36:53,332 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-14 12:36:53,332 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-14 12:36:53,333 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-09-14 12:36:54,373 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-14 12:36:54,401 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-14 12:36:54,405 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-14 12:36:54,407 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-14 12:36:54,407 INFO L275 PluginConnector]: CDTParser initialized [2020-09-14 12:36:54,409 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longest-1.i [2020-09-14 12:36:54,492 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b9b1b2153/ebe06e765988436c9647025315304531/FLAGad339927d [2020-09-14 12:36:55,116 INFO L306 CDTParser]: Found 1 translation units. [2020-09-14 12:36:55,117 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/pthread/fib_bench_longest-1.i [2020-09-14 12:36:55,132 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b9b1b2153/ebe06e765988436c9647025315304531/FLAGad339927d [2020-09-14 12:36:55,393 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b9b1b2153/ebe06e765988436c9647025315304531 [2020-09-14 12:36:55,405 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-14 12:36:55,410 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-09-14 12:36:55,412 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-14 12:36:55,412 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-14 12:36:55,416 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-14 12:36:55,418 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.09 12:36:55" (1/1) ... [2020-09-14 12:36:55,422 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e6a7531 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 12:36:55, skipping insertion in model container [2020-09-14 12:36:55,423 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.09 12:36:55" (1/1) ... [2020-09-14 12:36:55,431 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-14 12:36:55,477 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-14 12:36:56,054 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-14 12:36:56,067 INFO L203 MainTranslator]: Completed pre-run [2020-09-14 12:36:56,112 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-14 12:36:56,202 INFO L208 MainTranslator]: Completed translation [2020-09-14 12:36:56,204 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 12:36:56 WrapperNode [2020-09-14 12:36:56,204 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-14 12:36:56,205 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-09-14 12:36:56,205 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-09-14 12:36:56,205 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-09-14 12:36:56,217 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 12:36:56" (1/1) ... [2020-09-14 12:36:56,255 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 12:36:56" (1/1) ... [2020-09-14 12:36:56,281 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-09-14 12:36:56,281 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-14 12:36:56,282 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-14 12:36:56,282 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-14 12:36:56,291 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 12:36:56" (1/1) ... [2020-09-14 12:36:56,291 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 12:36:56" (1/1) ... [2020-09-14 12:36:56,294 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 12:36:56" (1/1) ... [2020-09-14 12:36:56,294 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 12:36:56" (1/1) ... [2020-09-14 12:36:56,300 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 12:36:56" (1/1) ... [2020-09-14 12:36:56,306 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 12:36:56" (1/1) ... [2020-09-14 12:36:56,308 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 12:36:56" (1/1) ... [2020-09-14 12:36:56,311 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-14 12:36:56,312 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-14 12:36:56,312 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-14 12:36:56,312 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-14 12:36:56,313 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 12:36:56" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:36:56,396 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-09-14 12:36:56,396 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-09-14 12:36:56,397 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-09-14 12:36:56,397 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-09-14 12:36:56,397 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-14 12:36:56,397 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-09-14 12:36:56,398 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-14 12:36:56,398 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-14 12:36:56,398 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-09-14 12:36:56,398 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-14 12:36:56,398 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-14 12:36:56,400 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-09-14 12:36:56,872 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-14 12:36:56,872 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-09-14 12:36:56,877 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.09 12:36:56 BoogieIcfgContainer [2020-09-14 12:36:56,877 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-14 12:36:56,879 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-14 12:36:56,879 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-14 12:36:56,883 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-14 12:36:56,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.09 12:36:55" (1/3) ... [2020-09-14 12:36:56,884 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16b16ee8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.09 12:36:56, skipping insertion in model container [2020-09-14 12:36:56,885 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 12:36:56" (2/3) ... [2020-09-14 12:36:56,885 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16b16ee8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.09 12:36:56, skipping insertion in model container [2020-09-14 12:36:56,885 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.09 12:36:56" (3/3) ... [2020-09-14 12:36:56,888 INFO L109 eAbstractionObserver]: Analyzing ICFG fib_bench_longest-1.i [2020-09-14 12:36:56,900 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-09-14 12:36:56,900 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-09-14 12:36:56,911 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-14 12:36:56,912 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-09-14 12:36:56,938 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,938 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,938 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,938 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,939 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,939 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,939 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,940 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,940 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,940 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,941 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,941 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,941 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,941 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,941 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,942 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,942 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,942 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,942 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,943 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,943 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,943 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,943 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,944 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,944 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,944 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,945 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,945 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,945 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,946 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,950 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,950 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,950 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,951 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,951 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,951 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,960 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,961 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,961 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,961 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,961 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,962 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,988 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-09-14 12:36:57,011 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-14 12:36:57,011 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-14 12:36:57,012 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-09-14 12:36:57,012 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-14 12:36:57,012 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-14 12:36:57,012 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-14 12:36:57,012 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-14 12:36:57,012 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-14 12:36:57,030 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 59 places, 57 transitions, 124 flow [2020-09-14 12:36:57,032 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-09-14 12:36:57,080 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-09-14 12:36:57,080 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-14 12:36:57,087 INFO L80 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 55 events. 5/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 84 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2020-09-14 12:36:57,090 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-09-14 12:36:57,121 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-09-14 12:36:57,121 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-14 12:36:57,122 INFO L80 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 55 events. 5/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 84 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2020-09-14 12:36:57,126 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 1032 [2020-09-14 12:36:57,129 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-09-14 12:36:58,385 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-09-14 12:36:58,521 INFO L206 etLargeBlockEncoding]: Checked pairs total: 988 [2020-09-14 12:36:58,522 INFO L214 etLargeBlockEncoding]: Total number of compositions: 47 [2020-09-14 12:36:58,527 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-09-14 12:36:58,539 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-09-14 12:36:58,542 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-09-14 12:36:58,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-09-14 12:36:58,550 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:36:58,551 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-09-14 12:36:58,551 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:36:58,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:36:58,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1563716626, now seen corresponding path program 1 times [2020-09-14 12:36:58,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:36:58,569 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190276455] [2020-09-14 12:36:58,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:36:58,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:36:58,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:36:58,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190276455] [2020-09-14 12:36:58,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-14 12:36:58,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-14 12:36:58,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034176461] [2020-09-14 12:36:58,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-14 12:36:58,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:36:58,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-14 12:36:58,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-14 12:36:58,860 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-09-14 12:36:58,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:36:58,940 INFO L93 Difference]: Finished difference Result 83 states and 212 transitions. [2020-09-14 12:36:58,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-14 12:36:58,943 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-09-14 12:36:58,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:36:58,960 INFO L225 Difference]: With dead ends: 83 [2020-09-14 12:36:58,960 INFO L226 Difference]: Without dead ends: 54 [2020-09-14 12:36:58,962 INFO L675 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 [2020-09-14 12:36:58,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-14 12:36:59,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-09-14 12:36:59,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-14 12:36:59,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 120 transitions. [2020-09-14 12:36:59,015 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 120 transitions. Word has length 6 [2020-09-14 12:36:59,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:36:59,016 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 120 transitions. [2020-09-14 12:36:59,016 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-14 12:36:59,016 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 120 transitions. [2020-09-14 12:36:59,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-14 12:36:59,017 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:36:59,018 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:36:59,018 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-14 12:36:59,018 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:36:59,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:36:59,019 INFO L82 PathProgramCache]: Analyzing trace with hash 956938306, now seen corresponding path program 1 times [2020-09-14 12:36:59,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:36:59,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442256006] [2020-09-14 12:36:59,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:36:59,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:36:59,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:36:59,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442256006] [2020-09-14 12:36:59,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-14 12:36:59,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-14 12:36:59,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386436376] [2020-09-14 12:36:59,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-14 12:36:59,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:36:59,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-14 12:36:59,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-14 12:36:59,140 INFO L87 Difference]: Start difference. First operand 50 states and 120 transitions. Second operand 5 states. [2020-09-14 12:36:59,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:36:59,198 INFO L93 Difference]: Finished difference Result 80 states and 186 transitions. [2020-09-14 12:36:59,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-14 12:36:59,199 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-09-14 12:36:59,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:36:59,201 INFO L225 Difference]: With dead ends: 80 [2020-09-14 12:36:59,201 INFO L226 Difference]: Without dead ends: 75 [2020-09-14 12:36:59,202 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-14 12:36:59,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-14 12:36:59,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 55. [2020-09-14 12:36:59,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-14 12:36:59,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-09-14 12:36:59,213 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 8 [2020-09-14 12:36:59,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:36:59,214 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-09-14 12:36:59,214 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-14 12:36:59,215 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-09-14 12:36:59,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-14 12:36:59,216 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:36:59,216 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:36:59,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-14 12:36:59,216 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:36:59,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:36:59,217 INFO L82 PathProgramCache]: Analyzing trace with hash 507192011, now seen corresponding path program 1 times [2020-09-14 12:36:59,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:36:59,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134643226] [2020-09-14 12:36:59,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:36:59,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:36:59,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:36:59,331 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134643226] [2020-09-14 12:36:59,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-14 12:36:59,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-14 12:36:59,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63981902] [2020-09-14 12:36:59,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-14 12:36:59,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:36:59,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-14 12:36:59,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-14 12:36:59,333 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 5 states. [2020-09-14 12:36:59,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:36:59,372 INFO L93 Difference]: Finished difference Result 73 states and 170 transitions. [2020-09-14 12:36:59,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-14 12:36:59,372 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-09-14 12:36:59,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:36:59,374 INFO L225 Difference]: With dead ends: 73 [2020-09-14 12:36:59,374 INFO L226 Difference]: Without dead ends: 70 [2020-09-14 12:36:59,374 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-14 12:36:59,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-14 12:36:59,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-09-14 12:36:59,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-14 12:36:59,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 152 transitions. [2020-09-14 12:36:59,383 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 152 transitions. Word has length 8 [2020-09-14 12:36:59,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:36:59,383 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 152 transitions. [2020-09-14 12:36:59,384 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-14 12:36:59,384 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 152 transitions. [2020-09-14 12:36:59,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-14 12:36:59,385 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:36:59,385 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:36:59,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-14 12:36:59,385 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:36:59,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:36:59,386 INFO L82 PathProgramCache]: Analyzing trace with hash 507214331, now seen corresponding path program 2 times [2020-09-14 12:36:59,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:36:59,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668127686] [2020-09-14 12:36:59,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:36:59,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:36:59,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:36:59,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668127686] [2020-09-14 12:36:59,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-14 12:36:59,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-14 12:36:59,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578028394] [2020-09-14 12:36:59,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-14 12:36:59,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:36:59,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-14 12:36:59,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-14 12:36:59,465 INFO L87 Difference]: Start difference. First operand 64 states and 152 transitions. Second operand 5 states. [2020-09-14 12:36:59,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:36:59,532 INFO L93 Difference]: Finished difference Result 86 states and 202 transitions. [2020-09-14 12:36:59,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-14 12:36:59,533 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-09-14 12:36:59,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:36:59,534 INFO L225 Difference]: With dead ends: 86 [2020-09-14 12:36:59,535 INFO L226 Difference]: Without dead ends: 80 [2020-09-14 12:36:59,535 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-14 12:36:59,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-14 12:36:59,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2020-09-14 12:36:59,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-14 12:36:59,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 157 transitions. [2020-09-14 12:36:59,545 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 157 transitions. Word has length 8 [2020-09-14 12:36:59,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:36:59,545 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 157 transitions. [2020-09-14 12:36:59,545 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-14 12:36:59,546 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 157 transitions. [2020-09-14 12:36:59,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-09-14 12:36:59,547 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:36:59,547 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:36:59,547 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-14 12:36:59,547 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:36:59,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:36:59,548 INFO L82 PathProgramCache]: Analyzing trace with hash -399661872, now seen corresponding path program 2 times [2020-09-14 12:36:59,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:36:59,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114811641] [2020-09-14 12:36:59,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:36:59,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:36:59,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:36:59,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114811641] [2020-09-14 12:36:59,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279370683] [2020-09-14 12:36:59,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:36:59,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:36:59,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:36:59,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-14 12:36:59,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:36:59,835 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:36:59,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:36:59,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:36:59,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2020-09-14 12:36:59,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628602375] [2020-09-14 12:36:59,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-14 12:36:59,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:36:59,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-14 12:36:59,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-09-14 12:36:59,862 INFO L87 Difference]: Start difference. First operand 66 states and 157 transitions. Second operand 10 states. [2020-09-14 12:36:59,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:36:59,940 INFO L93 Difference]: Finished difference Result 101 states and 235 transitions. [2020-09-14 12:36:59,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-14 12:36:59,940 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2020-09-14 12:36:59,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:36:59,942 INFO L225 Difference]: With dead ends: 101 [2020-09-14 12:36:59,942 INFO L226 Difference]: Without dead ends: 96 [2020-09-14 12:36:59,943 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:36:59,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-14 12:36:59,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2020-09-14 12:36:59,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-14 12:36:59,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 173 transitions. [2020-09-14 12:36:59,951 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 173 transitions. Word has length 9 [2020-09-14 12:36:59,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:36:59,952 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 173 transitions. [2020-09-14 12:36:59,952 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-14 12:36:59,952 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 173 transitions. [2020-09-14 12:36:59,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-09-14 12:36:59,953 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:36:59,953 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:00,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:37:00,170 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:00,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:00,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1456916488, now seen corresponding path program 3 times [2020-09-14 12:37:00,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:00,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948180637] [2020-09-14 12:37:00,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:00,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:00,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:00,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948180637] [2020-09-14 12:37:00,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202439845] [2020-09-14 12:37:00,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:00,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-14 12:37:00,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:00,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-14 12:37:00,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:00,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:00,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:00,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-09-14 12:37:00,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291921855] [2020-09-14 12:37:00,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-14 12:37:00,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:00,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-14 12:37:00,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-09-14 12:37:00,428 INFO L87 Difference]: Start difference. First operand 71 states and 173 transitions. Second operand 9 states. [2020-09-14 12:37:00,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:00,465 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-09-14 12:37:00,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-14 12:37:00,466 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-09-14 12:37:00,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:00,467 INFO L225 Difference]: With dead ends: 84 [2020-09-14 12:37:00,467 INFO L226 Difference]: Without dead ends: 81 [2020-09-14 12:37:00,468 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-09-14 12:37:00,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-14 12:37:00,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2020-09-14 12:37:00,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-14 12:37:00,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 179 transitions. [2020-09-14 12:37:00,482 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 179 transitions. Word has length 9 [2020-09-14 12:37:00,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:00,482 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 179 transitions. [2020-09-14 12:37:00,482 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-14 12:37:00,483 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 179 transitions. [2020-09-14 12:37:00,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-09-14 12:37:00,484 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:00,484 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:00,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:37:00,685 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:00,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:00,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1456224568, now seen corresponding path program 4 times [2020-09-14 12:37:00,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:00,687 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895894210] [2020-09-14 12:37:00,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:00,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:00,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:00,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895894210] [2020-09-14 12:37:00,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947873256] [2020-09-14 12:37:00,763 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:00,818 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:37:00,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:00,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-14 12:37:00,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:00,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:00,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:00,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-09-14 12:37:00,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777448272] [2020-09-14 12:37:00,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-14 12:37:00,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:00,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-14 12:37:00,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-09-14 12:37:00,895 INFO L87 Difference]: Start difference. First operand 74 states and 179 transitions. Second operand 9 states. [2020-09-14 12:37:00,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:00,955 INFO L93 Difference]: Finished difference Result 90 states and 213 transitions. [2020-09-14 12:37:00,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-14 12:37:00,956 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-09-14 12:37:00,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:00,957 INFO L225 Difference]: With dead ends: 90 [2020-09-14 12:37:00,957 INFO L226 Difference]: Without dead ends: 87 [2020-09-14 12:37:00,958 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-09-14 12:37:00,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-09-14 12:37:00,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 76. [2020-09-14 12:37:00,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-14 12:37:00,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 186 transitions. [2020-09-14 12:37:00,965 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 186 transitions. Word has length 9 [2020-09-14 12:37:00,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:00,965 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 186 transitions. [2020-09-14 12:37:00,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-14 12:37:00,966 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 186 transitions. [2020-09-14 12:37:00,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-09-14 12:37:00,967 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:00,967 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:01,181 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:37:01,182 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:01,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:01,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1456202248, now seen corresponding path program 5 times [2020-09-14 12:37:01,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:01,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454404424] [2020-09-14 12:37:01,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:01,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:01,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:01,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454404424] [2020-09-14 12:37:01,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427420957] [2020-09-14 12:37:01,270 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:01,330 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:37:01,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:01,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-14 12:37:01,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:01,390 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:37:01,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:01,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:01,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-09-14 12:37:01,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851894237] [2020-09-14 12:37:01,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-14 12:37:01,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:01,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-14 12:37:01,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-09-14 12:37:01,412 INFO L87 Difference]: Start difference. First operand 76 states and 186 transitions. Second operand 9 states. [2020-09-14 12:37:01,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:01,513 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-09-14 12:37:01,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-14 12:37:01,514 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-09-14 12:37:01,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:01,515 INFO L225 Difference]: With dead ends: 99 [2020-09-14 12:37:01,515 INFO L226 Difference]: Without dead ends: 93 [2020-09-14 12:37:01,515 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-09-14 12:37:01,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-14 12:37:01,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 77. [2020-09-14 12:37:01,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-14 12:37:01,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 190 transitions. [2020-09-14 12:37:01,522 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 190 transitions. Word has length 9 [2020-09-14 12:37:01,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:01,522 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 190 transitions. [2020-09-14 12:37:01,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-14 12:37:01,523 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 190 transitions. [2020-09-14 12:37:01,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-14 12:37:01,524 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:01,524 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:01,739 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:37:01,740 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:01,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:01,741 INFO L82 PathProgramCache]: Analyzing trace with hash 483638869, now seen corresponding path program 1 times [2020-09-14 12:37:01,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:01,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895868921] [2020-09-14 12:37:01,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:01,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:01,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:01,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895868921] [2020-09-14 12:37:01,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-14 12:37:01,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-14 12:37:01,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537663561] [2020-09-14 12:37:01,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-14 12:37:01,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:01,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-14 12:37:01,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-14 12:37:01,835 INFO L87 Difference]: Start difference. First operand 77 states and 190 transitions. Second operand 6 states. [2020-09-14 12:37:01,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:01,873 INFO L93 Difference]: Finished difference Result 92 states and 220 transitions. [2020-09-14 12:37:01,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-14 12:37:01,873 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-14 12:37:01,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:01,874 INFO L225 Difference]: With dead ends: 92 [2020-09-14 12:37:01,875 INFO L226 Difference]: Without dead ends: 90 [2020-09-14 12:37:01,875 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-14 12:37:01,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-14 12:37:01,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 79. [2020-09-14 12:37:01,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-14 12:37:01,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 194 transitions. [2020-09-14 12:37:01,885 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 194 transitions. Word has length 10 [2020-09-14 12:37:01,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:01,885 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 194 transitions. [2020-09-14 12:37:01,885 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-14 12:37:01,885 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 194 transitions. [2020-09-14 12:37:01,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-14 12:37:01,888 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:01,888 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:01,888 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-14 12:37:01,889 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:01,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:01,889 INFO L82 PathProgramCache]: Analyzing trace with hash 484301959, now seen corresponding path program 2 times [2020-09-14 12:37:01,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:01,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406985029] [2020-09-14 12:37:01,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:01,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:02,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:02,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406985029] [2020-09-14 12:37:02,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-14 12:37:02,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-14 12:37:02,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954882992] [2020-09-14 12:37:02,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-14 12:37:02,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:02,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-14 12:37:02,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-14 12:37:02,005 INFO L87 Difference]: Start difference. First operand 79 states and 194 transitions. Second operand 6 states. [2020-09-14 12:37:02,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:02,067 INFO L93 Difference]: Finished difference Result 100 states and 234 transitions. [2020-09-14 12:37:02,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-14 12:37:02,068 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-14 12:37:02,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:02,069 INFO L225 Difference]: With dead ends: 100 [2020-09-14 12:37:02,069 INFO L226 Difference]: Without dead ends: 98 [2020-09-14 12:37:02,070 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-14 12:37:02,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-14 12:37:02,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 83. [2020-09-14 12:37:02,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-14 12:37:02,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 200 transitions. [2020-09-14 12:37:02,084 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 200 transitions. Word has length 10 [2020-09-14 12:37:02,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:02,084 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 200 transitions. [2020-09-14 12:37:02,085 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-14 12:37:02,085 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 200 transitions. [2020-09-14 12:37:02,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-14 12:37:02,090 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:02,090 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:02,090 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-14 12:37:02,090 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:02,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:02,093 INFO L82 PathProgramCache]: Analyzing trace with hash 484324279, now seen corresponding path program 3 times [2020-09-14 12:37:02,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:02,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812089243] [2020-09-14 12:37:02,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:02,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:02,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:02,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812089243] [2020-09-14 12:37:02,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-14 12:37:02,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-14 12:37:02,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931321816] [2020-09-14 12:37:02,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-14 12:37:02,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:02,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-14 12:37:02,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-14 12:37:02,212 INFO L87 Difference]: Start difference. First operand 83 states and 200 transitions. Second operand 6 states. [2020-09-14 12:37:02,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:02,313 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-09-14 12:37:02,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-14 12:37:02,315 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-14 12:37:02,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:02,316 INFO L225 Difference]: With dead ends: 105 [2020-09-14 12:37:02,317 INFO L226 Difference]: Without dead ends: 100 [2020-09-14 12:37:02,317 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-09-14 12:37:02,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-14 12:37:02,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-09-14 12:37:02,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-14 12:37:02,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 198 transitions. [2020-09-14 12:37:02,322 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 198 transitions. Word has length 10 [2020-09-14 12:37:02,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:02,322 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 198 transitions. [2020-09-14 12:37:02,322 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-14 12:37:02,322 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 198 transitions. [2020-09-14 12:37:02,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-14 12:37:02,323 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:02,323 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:02,324 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-14 12:37:02,324 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:02,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:02,324 INFO L82 PathProgramCache]: Analyzing trace with hash 484353109, now seen corresponding path program 4 times [2020-09-14 12:37:02,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:02,325 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744946405] [2020-09-14 12:37:02,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:02,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:02,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:02,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744946405] [2020-09-14 12:37:02,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-14 12:37:02,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-14 12:37:02,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472483422] [2020-09-14 12:37:02,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-14 12:37:02,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:02,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-14 12:37:02,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-14 12:37:02,399 INFO L87 Difference]: Start difference. First operand 82 states and 198 transitions. Second operand 6 states. [2020-09-14 12:37:02,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:02,476 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-09-14 12:37:02,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-14 12:37:02,477 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-14 12:37:02,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:02,478 INFO L225 Difference]: With dead ends: 105 [2020-09-14 12:37:02,478 INFO L226 Difference]: Without dead ends: 100 [2020-09-14 12:37:02,479 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-09-14 12:37:02,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-14 12:37:02,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-09-14 12:37:02,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-14 12:37:02,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 194 transitions. [2020-09-14 12:37:02,484 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 194 transitions. Word has length 10 [2020-09-14 12:37:02,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:02,484 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 194 transitions. [2020-09-14 12:37:02,485 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-14 12:37:02,485 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 194 transitions. [2020-09-14 12:37:02,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-14 12:37:02,485 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:02,485 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:02,486 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-14 12:37:02,486 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:02,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:02,486 INFO L82 PathProgramCache]: Analyzing trace with hash 495405570, now seen corresponding path program 3 times [2020-09-14 12:37:02,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:02,487 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712250883] [2020-09-14 12:37:02,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:02,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:02,572 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:02,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712250883] [2020-09-14 12:37:02,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174555663] [2020-09-14 12:37:02,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:02,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-14 12:37:02,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:02,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-14 12:37:02,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:02,723 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:37:02,748 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:02,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:02,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-09-14 12:37:02,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427829553] [2020-09-14 12:37:02,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-14 12:37:02,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:02,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-14 12:37:02,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-09-14 12:37:02,750 INFO L87 Difference]: Start difference. First operand 82 states and 194 transitions. Second operand 12 states. [2020-09-14 12:37:02,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:02,849 INFO L93 Difference]: Finished difference Result 122 states and 284 transitions. [2020-09-14 12:37:02,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-14 12:37:02,850 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2020-09-14 12:37:02,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:02,851 INFO L225 Difference]: With dead ends: 122 [2020-09-14 12:37:02,851 INFO L226 Difference]: Without dead ends: 117 [2020-09-14 12:37:02,852 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-09-14 12:37:02,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-14 12:37:02,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 88. [2020-09-14 12:37:02,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-14 12:37:02,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 215 transitions. [2020-09-14 12:37:02,857 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 215 transitions. Word has length 10 [2020-09-14 12:37:02,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:02,858 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 215 transitions. [2020-09-14 12:37:02,858 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-14 12:37:02,858 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 215 transitions. [2020-09-14 12:37:02,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-14 12:37:02,859 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:02,859 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:03,070 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-09-14 12:37:03,071 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:03,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:03,071 INFO L82 PathProgramCache]: Analyzing trace with hash 2080229483, now seen corresponding path program 6 times [2020-09-14 12:37:03,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:03,072 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870193233] [2020-09-14 12:37:03,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:03,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:03,170 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:03,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870193233] [2020-09-14 12:37:03,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479107559] [2020-09-14 12:37:03,171 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:03,234 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-14 12:37:03,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:03,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-14 12:37:03,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:03,345 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:03,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:03,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-14 12:37:03,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235692988] [2020-09-14 12:37:03,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-14 12:37:03,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:03,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-14 12:37:03,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-14 12:37:03,347 INFO L87 Difference]: Start difference. First operand 88 states and 215 transitions. Second operand 11 states. [2020-09-14 12:37:03,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:03,394 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-09-14 12:37:03,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-14 12:37:03,394 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-09-14 12:37:03,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:03,395 INFO L225 Difference]: With dead ends: 108 [2020-09-14 12:37:03,396 INFO L226 Difference]: Without dead ends: 105 [2020-09-14 12:37:03,396 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-14 12:37:03,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-14 12:37:03,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 91. [2020-09-14 12:37:03,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-09-14 12:37:03,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 221 transitions. [2020-09-14 12:37:03,401 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 221 transitions. Word has length 10 [2020-09-14 12:37:03,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:03,401 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 221 transitions. [2020-09-14 12:37:03,401 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-14 12:37:03,402 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 221 transitions. [2020-09-14 12:37:03,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-14 12:37:03,402 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:03,402 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:03,613 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:37:03,613 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:03,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:03,614 INFO L82 PathProgramCache]: Analyzing trace with hash 2101679003, now seen corresponding path program 7 times [2020-09-14 12:37:03,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:03,614 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607433891] [2020-09-14 12:37:03,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:03,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:03,708 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:03,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607433891] [2020-09-14 12:37:03,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692687533] [2020-09-14 12:37:03,709 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:03,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:03,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-14 12:37:03,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:03,857 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:03,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:03,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-14 12:37:03,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403787893] [2020-09-14 12:37:03,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-14 12:37:03,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:03,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-14 12:37:03,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-09-14 12:37:03,859 INFO L87 Difference]: Start difference. First operand 91 states and 221 transitions. Second operand 11 states. [2020-09-14 12:37:03,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:03,916 INFO L93 Difference]: Finished difference Result 116 states and 270 transitions. [2020-09-14 12:37:03,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-14 12:37:03,917 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-09-14 12:37:03,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:03,918 INFO L225 Difference]: With dead ends: 116 [2020-09-14 12:37:03,918 INFO L226 Difference]: Without dead ends: 113 [2020-09-14 12:37:03,919 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-14 12:37:03,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-14 12:37:03,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 92. [2020-09-14 12:37:03,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-14 12:37:03,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 223 transitions. [2020-09-14 12:37:03,924 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 223 transitions. Word has length 10 [2020-09-14 12:37:03,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:03,924 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 223 transitions. [2020-09-14 12:37:03,924 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-14 12:37:03,924 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 223 transitions. [2020-09-14 12:37:03,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-14 12:37:03,925 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:03,925 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:04,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-09-14 12:37:04,126 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:04,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:04,126 INFO L82 PathProgramCache]: Analyzing trace with hash 2102370923, now seen corresponding path program 8 times [2020-09-14 12:37:04,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:04,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763466589] [2020-09-14 12:37:04,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:04,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:04,205 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:04,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763466589] [2020-09-14 12:37:04,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205760842] [2020-09-14 12:37:04,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:04,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:37:04,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:04,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-14 12:37:04,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:04,340 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:04,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:04,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-14 12:37:04,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459225759] [2020-09-14 12:37:04,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-14 12:37:04,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:04,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-14 12:37:04,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-09-14 12:37:04,342 INFO L87 Difference]: Start difference. First operand 92 states and 223 transitions. Second operand 11 states. [2020-09-14 12:37:04,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:04,442 INFO L93 Difference]: Finished difference Result 115 states and 270 transitions. [2020-09-14 12:37:04,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-14 12:37:04,443 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-09-14 12:37:04,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:04,444 INFO L225 Difference]: With dead ends: 115 [2020-09-14 12:37:04,444 INFO L226 Difference]: Without dead ends: 112 [2020-09-14 12:37:04,445 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:37:04,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-14 12:37:04,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 94. [2020-09-14 12:37:04,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-14 12:37:04,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 230 transitions. [2020-09-14 12:37:04,449 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 230 transitions. Word has length 10 [2020-09-14 12:37:04,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:04,450 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 230 transitions. [2020-09-14 12:37:04,450 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-14 12:37:04,450 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 230 transitions. [2020-09-14 12:37:04,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-14 12:37:04,451 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:04,451 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:04,662 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-09-14 12:37:04,663 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:04,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:04,663 INFO L82 PathProgramCache]: Analyzing trace with hash 2102393243, now seen corresponding path program 9 times [2020-09-14 12:37:04,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:04,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864665406] [2020-09-14 12:37:04,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:04,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:04,742 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:04,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864665406] [2020-09-14 12:37:04,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174820481] [2020-09-14 12:37:04,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:04,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-14 12:37:04,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:04,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-14 12:37:04,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:04,889 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:37:04,900 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:04,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:04,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-14 12:37:04,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968516526] [2020-09-14 12:37:04,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-14 12:37:04,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:04,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-14 12:37:04,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-14 12:37:04,902 INFO L87 Difference]: Start difference. First operand 94 states and 230 transitions. Second operand 11 states. [2020-09-14 12:37:05,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:05,047 INFO L93 Difference]: Finished difference Result 124 states and 294 transitions. [2020-09-14 12:37:05,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-14 12:37:05,048 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-09-14 12:37:05,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:05,049 INFO L225 Difference]: With dead ends: 124 [2020-09-14 12:37:05,049 INFO L226 Difference]: Without dead ends: 118 [2020-09-14 12:37:05,050 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:37:05,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-14 12:37:05,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 94. [2020-09-14 12:37:05,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-14 12:37:05,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 232 transitions. [2020-09-14 12:37:05,055 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 232 transitions. Word has length 10 [2020-09-14 12:37:05,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:05,055 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 232 transitions. [2020-09-14 12:37:05,055 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-14 12:37:05,055 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 232 transitions. [2020-09-14 12:37:05,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-14 12:37:05,056 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:05,056 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:05,266 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-09-14 12:37:05,267 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:05,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:05,267 INFO L82 PathProgramCache]: Analyzing trace with hash 2107902445, now seen corresponding path program 5 times [2020-09-14 12:37:05,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:05,268 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275621853] [2020-09-14 12:37:05,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:05,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:05,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:05,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275621853] [2020-09-14 12:37:05,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218198720] [2020-09-14 12:37:05,352 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:05,399 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:37:05,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:05,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-14 12:37:05,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:05,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:05,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:05,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-14 12:37:05,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606589948] [2020-09-14 12:37:05,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-14 12:37:05,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:05,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-14 12:37:05,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-14 12:37:05,512 INFO L87 Difference]: Start difference. First operand 94 states and 232 transitions. Second operand 11 states. [2020-09-14 12:37:05,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:05,564 INFO L93 Difference]: Finished difference Result 113 states and 270 transitions. [2020-09-14 12:37:05,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-14 12:37:05,564 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-14 12:37:05,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:05,566 INFO L225 Difference]: With dead ends: 113 [2020-09-14 12:37:05,566 INFO L226 Difference]: Without dead ends: 111 [2020-09-14 12:37:05,567 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-14 12:37:05,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-14 12:37:05,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 96. [2020-09-14 12:37:05,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-14 12:37:05,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 238 transitions. [2020-09-14 12:37:05,573 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 238 transitions. Word has length 11 [2020-09-14 12:37:05,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:05,573 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 238 transitions. [2020-09-14 12:37:05,574 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-14 12:37:05,574 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 238 transitions. [2020-09-14 12:37:05,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-14 12:37:05,575 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:05,575 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:05,790 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-09-14 12:37:05,790 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:05,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:05,792 INFO L82 PathProgramCache]: Analyzing trace with hash 2107903406, now seen corresponding path program 6 times [2020-09-14 12:37:05,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:05,792 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029236501] [2020-09-14 12:37:05,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:05,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:05,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:05,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029236501] [2020-09-14 12:37:05,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081037493] [2020-09-14 12:37:05,899 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:05,946 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-14 12:37:05,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:05,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-14 12:37:05,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:06,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:06,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:06,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-14 12:37:06,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525174219] [2020-09-14 12:37:06,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-14 12:37:06,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:06,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-14 12:37:06,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-14 12:37:06,041 INFO L87 Difference]: Start difference. First operand 96 states and 238 transitions. Second operand 11 states. [2020-09-14 12:37:06,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:06,142 INFO L93 Difference]: Finished difference Result 118 states and 280 transitions. [2020-09-14 12:37:06,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-14 12:37:06,143 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-14 12:37:06,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:06,144 INFO L225 Difference]: With dead ends: 118 [2020-09-14 12:37:06,144 INFO L226 Difference]: Without dead ends: 116 [2020-09-14 12:37:06,144 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:37:06,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-09-14 12:37:06,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 97. [2020-09-14 12:37:06,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-09-14 12:37:06,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 239 transitions. [2020-09-14 12:37:06,148 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 239 transitions. Word has length 11 [2020-09-14 12:37:06,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:06,149 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 239 transitions. [2020-09-14 12:37:06,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-14 12:37:06,149 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 239 transitions. [2020-09-14 12:37:06,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-14 12:37:06,149 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:06,150 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:06,365 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:37:06,366 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:06,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:06,366 INFO L82 PathProgramCache]: Analyzing trace with hash 2107932236, now seen corresponding path program 7 times [2020-09-14 12:37:06,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:06,367 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141983337] [2020-09-14 12:37:06,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:06,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:06,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:06,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141983337] [2020-09-14 12:37:06,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367561867] [2020-09-14 12:37:06,452 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:06,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:06,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-14 12:37:06,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:06,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:06,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:06,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-14 12:37:06,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193313831] [2020-09-14 12:37:06,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-14 12:37:06,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:06,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-14 12:37:06,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-14 12:37:06,610 INFO L87 Difference]: Start difference. First operand 97 states and 239 transitions. Second operand 11 states. [2020-09-14 12:37:06,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:06,692 INFO L93 Difference]: Finished difference Result 119 states and 282 transitions. [2020-09-14 12:37:06,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-14 12:37:06,693 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-14 12:37:06,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:06,694 INFO L225 Difference]: With dead ends: 119 [2020-09-14 12:37:06,694 INFO L226 Difference]: Without dead ends: 117 [2020-09-14 12:37:06,694 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:37:06,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-14 12:37:06,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 98. [2020-09-14 12:37:06,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-14 12:37:06,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 241 transitions. [2020-09-14 12:37:06,698 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 241 transitions. Word has length 11 [2020-09-14 12:37:06,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:06,699 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 241 transitions. [2020-09-14 12:37:06,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-14 12:37:06,699 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 241 transitions. [2020-09-14 12:37:06,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-14 12:37:06,699 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:06,700 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:06,911 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:37:06,911 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:06,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:06,913 INFO L82 PathProgramCache]: Analyzing trace with hash 2128458235, now seen corresponding path program 8 times [2020-09-14 12:37:06,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:06,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238856478] [2020-09-14 12:37:06,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:06,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:07,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:07,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238856478] [2020-09-14 12:37:07,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643643427] [2020-09-14 12:37:07,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:07,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:37:07,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:07,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-14 12:37:07,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:07,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:07,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:07,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-14 12:37:07,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974644239] [2020-09-14 12:37:07,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-14 12:37:07,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:07,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-14 12:37:07,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-09-14 12:37:07,159 INFO L87 Difference]: Start difference. First operand 98 states and 241 transitions. Second operand 11 states. [2020-09-14 12:37:07,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:07,227 INFO L93 Difference]: Finished difference Result 122 states and 288 transitions. [2020-09-14 12:37:07,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-14 12:37:07,227 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-14 12:37:07,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:07,229 INFO L225 Difference]: With dead ends: 122 [2020-09-14 12:37:07,229 INFO L226 Difference]: Without dead ends: 120 [2020-09-14 12:37:07,229 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-14 12:37:07,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-09-14 12:37:07,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 100. [2020-09-14 12:37:07,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-14 12:37:07,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 247 transitions. [2020-09-14 12:37:07,233 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 247 transitions. Word has length 11 [2020-09-14 12:37:07,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:07,234 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 247 transitions. [2020-09-14 12:37:07,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-14 12:37:07,234 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 247 transitions. [2020-09-14 12:37:07,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-14 12:37:07,235 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:07,235 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:07,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-09-14 12:37:07,446 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:07,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:07,447 INFO L82 PathProgramCache]: Analyzing trace with hash 2128459196, now seen corresponding path program 9 times [2020-09-14 12:37:07,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:07,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651389755] [2020-09-14 12:37:07,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:07,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:07,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:07,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651389755] [2020-09-14 12:37:07,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954146899] [2020-09-14 12:37:07,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:07,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-14 12:37:07,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:07,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-14 12:37:07,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:07,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:07,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:07,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-14 12:37:07,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628802161] [2020-09-14 12:37:07,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-14 12:37:07,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:07,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-14 12:37:07,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-09-14 12:37:07,692 INFO L87 Difference]: Start difference. First operand 100 states and 247 transitions. Second operand 11 states. [2020-09-14 12:37:07,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:07,813 INFO L93 Difference]: Finished difference Result 123 states and 290 transitions. [2020-09-14 12:37:07,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-14 12:37:07,814 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-14 12:37:07,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:07,815 INFO L225 Difference]: With dead ends: 123 [2020-09-14 12:37:07,815 INFO L226 Difference]: Without dead ends: 121 [2020-09-14 12:37:07,815 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-09-14 12:37:07,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-14 12:37:07,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 99. [2020-09-14 12:37:07,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-14 12:37:07,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 243 transitions. [2020-09-14 12:37:07,822 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 243 transitions. Word has length 11 [2020-09-14 12:37:07,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:07,822 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 243 transitions. [2020-09-14 12:37:07,822 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-14 12:37:07,822 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 243 transitions. [2020-09-14 12:37:07,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-14 12:37:07,824 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:07,824 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:08,034 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:37:08,034 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:08,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:08,035 INFO L82 PathProgramCache]: Analyzing trace with hash 2129121325, now seen corresponding path program 10 times [2020-09-14 12:37:08,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:08,035 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952246624] [2020-09-14 12:37:08,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:08,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:08,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:08,142 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952246624] [2020-09-14 12:37:08,142 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578824860] [2020-09-14 12:37:08,142 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:08,200 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:37:08,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:08,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-14 12:37:08,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:08,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:08,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:08,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-14 12:37:08,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324361553] [2020-09-14 12:37:08,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-14 12:37:08,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:08,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-14 12:37:08,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-09-14 12:37:08,290 INFO L87 Difference]: Start difference. First operand 99 states and 243 transitions. Second operand 11 states. [2020-09-14 12:37:08,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:08,374 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-09-14 12:37:08,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-14 12:37:08,374 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-14 12:37:08,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:08,375 INFO L225 Difference]: With dead ends: 123 [2020-09-14 12:37:08,376 INFO L226 Difference]: Without dead ends: 121 [2020-09-14 12:37:08,376 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:37:08,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-14 12:37:08,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 103. [2020-09-14 12:37:08,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-09-14 12:37:08,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 249 transitions. [2020-09-14 12:37:08,380 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 249 transitions. Word has length 11 [2020-09-14 12:37:08,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:08,380 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 249 transitions. [2020-09-14 12:37:08,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-14 12:37:08,381 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 249 transitions. [2020-09-14 12:37:08,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-14 12:37:08,381 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:08,381 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:08,592 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-09-14 12:37:08,592 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:08,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:08,593 INFO L82 PathProgramCache]: Analyzing trace with hash 2129143645, now seen corresponding path program 11 times [2020-09-14 12:37:08,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:08,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638443446] [2020-09-14 12:37:08,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:08,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:08,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:08,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638443446] [2020-09-14 12:37:08,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272914024] [2020-09-14 12:37:08,662 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:08,715 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:37:08,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:08,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-14 12:37:08,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:08,788 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:37:08,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:08,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:08,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-14 12:37:08,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450201882] [2020-09-14 12:37:08,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-14 12:37:08,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:08,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-14 12:37:08,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-09-14 12:37:08,834 INFO L87 Difference]: Start difference. First operand 103 states and 249 transitions. Second operand 11 states. [2020-09-14 12:37:09,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:09,049 INFO L93 Difference]: Finished difference Result 133 states and 314 transitions. [2020-09-14 12:37:09,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-14 12:37:09,050 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-14 12:37:09,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:09,051 INFO L225 Difference]: With dead ends: 133 [2020-09-14 12:37:09,051 INFO L226 Difference]: Without dead ends: 128 [2020-09-14 12:37:09,052 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:37:09,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-09-14 12:37:09,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 102. [2020-09-14 12:37:09,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-09-14 12:37:09,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 247 transitions. [2020-09-14 12:37:09,056 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 247 transitions. Word has length 11 [2020-09-14 12:37:09,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:09,056 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 247 transitions. [2020-09-14 12:37:09,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-14 12:37:09,056 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 247 transitions. [2020-09-14 12:37:09,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-14 12:37:09,057 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:09,057 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:09,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:37:09,267 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:09,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:09,268 INFO L82 PathProgramCache]: Analyzing trace with hash 2129151116, now seen corresponding path program 12 times [2020-09-14 12:37:09,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:09,268 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4743514] [2020-09-14 12:37:09,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:09,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:09,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:09,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4743514] [2020-09-14 12:37:09,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95952647] [2020-09-14 12:37:09,360 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:09,406 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-14 12:37:09,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:09,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-14 12:37:09,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:09,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:09,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:09,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-14 12:37:09,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24277902] [2020-09-14 12:37:09,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-14 12:37:09,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:09,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-14 12:37:09,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-09-14 12:37:09,501 INFO L87 Difference]: Start difference. First operand 102 states and 247 transitions. Second operand 11 states. [2020-09-14 12:37:09,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:09,641 INFO L93 Difference]: Finished difference Result 127 states and 298 transitions. [2020-09-14 12:37:09,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-14 12:37:09,643 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-14 12:37:09,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:09,644 INFO L225 Difference]: With dead ends: 127 [2020-09-14 12:37:09,644 INFO L226 Difference]: Without dead ends: 125 [2020-09-14 12:37:09,644 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:37:09,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-14 12:37:09,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 104. [2020-09-14 12:37:09,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-14 12:37:09,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-09-14 12:37:09,648 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-09-14 12:37:09,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:09,649 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-09-14 12:37:09,649 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-14 12:37:09,649 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-09-14 12:37:09,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-14 12:37:09,649 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:09,650 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:09,859 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-09-14 12:37:09,859 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:09,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:09,860 INFO L82 PathProgramCache]: Analyzing trace with hash 2129172475, now seen corresponding path program 13 times [2020-09-14 12:37:09,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:09,861 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426498464] [2020-09-14 12:37:09,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:09,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:09,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:09,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426498464] [2020-09-14 12:37:09,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386610011] [2020-09-14 12:37:09,930 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:09,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:09,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-14 12:37:09,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:10,057 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:37:10,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:10,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:10,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-14 12:37:10,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635365557] [2020-09-14 12:37:10,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-14 12:37:10,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:10,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-14 12:37:10,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-14 12:37:10,072 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-09-14 12:37:10,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:10,319 INFO L93 Difference]: Finished difference Result 141 states and 334 transitions. [2020-09-14 12:37:10,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-14 12:37:10,320 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-14 12:37:10,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:10,321 INFO L225 Difference]: With dead ends: 141 [2020-09-14 12:37:10,321 INFO L226 Difference]: Without dead ends: 136 [2020-09-14 12:37:10,322 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-09-14 12:37:10,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-09-14 12:37:10,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 104. [2020-09-14 12:37:10,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-14 12:37:10,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-09-14 12:37:10,326 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-09-14 12:37:10,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:10,326 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-09-14 12:37:10,326 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-14 12:37:10,326 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-09-14 12:37:10,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-14 12:37:10,327 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:10,327 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:10,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-09-14 12:37:10,537 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:10,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:10,538 INFO L82 PathProgramCache]: Analyzing trace with hash 2129173436, now seen corresponding path program 14 times [2020-09-14 12:37:10,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:10,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221683337] [2020-09-14 12:37:10,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:10,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:10,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:10,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221683337] [2020-09-14 12:37:10,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001514120] [2020-09-14 12:37:10,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:10,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:37:10,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:10,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-14 12:37:10,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:10,737 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:37:10,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:10,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:10,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-14 12:37:10,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958920413] [2020-09-14 12:37:10,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-14 12:37:10,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:10,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-14 12:37:10,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-09-14 12:37:10,748 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-09-14 12:37:10,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:10,947 INFO L93 Difference]: Finished difference Result 136 states and 319 transitions. [2020-09-14 12:37:10,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-14 12:37:10,948 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-14 12:37:10,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:10,949 INFO L225 Difference]: With dead ends: 136 [2020-09-14 12:37:10,949 INFO L226 Difference]: Without dead ends: 131 [2020-09-14 12:37:10,949 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:37:10,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-14 12:37:10,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 101. [2020-09-14 12:37:10,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-14 12:37:10,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 245 transitions. [2020-09-14 12:37:10,953 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 245 transitions. Word has length 11 [2020-09-14 12:37:10,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:10,955 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 245 transitions. [2020-09-14 12:37:10,955 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-14 12:37:10,955 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 245 transitions. [2020-09-14 12:37:10,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-14 12:37:10,955 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:10,956 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:11,167 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-09-14 12:37:11,167 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:11,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:11,168 INFO L82 PathProgramCache]: Analyzing trace with hash 2129381756, now seen corresponding path program 15 times [2020-09-14 12:37:11,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:11,169 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472349636] [2020-09-14 12:37:11,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:11,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:11,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:11,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472349636] [2020-09-14 12:37:11,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205492439] [2020-09-14 12:37:11,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:11,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-14 12:37:11,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:11,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-14 12:37:11,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:11,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:11,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:11,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-14 12:37:11,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381563610] [2020-09-14 12:37:11,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-14 12:37:11,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:11,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-14 12:37:11,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-09-14 12:37:11,382 INFO L87 Difference]: Start difference. First operand 101 states and 245 transitions. Second operand 11 states. [2020-09-14 12:37:11,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:11,506 INFO L93 Difference]: Finished difference Result 130 states and 301 transitions. [2020-09-14 12:37:11,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-14 12:37:11,506 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-14 12:37:11,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:11,507 INFO L225 Difference]: With dead ends: 130 [2020-09-14 12:37:11,511 INFO L226 Difference]: Without dead ends: 128 [2020-09-14 12:37:11,511 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-09-14 12:37:11,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-09-14 12:37:11,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 99. [2020-09-14 12:37:11,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-14 12:37:11,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-09-14 12:37:11,515 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-09-14 12:37:11,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:11,515 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-09-14 12:37:11,515 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-14 12:37:11,515 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-09-14 12:37:11,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-14 12:37:11,516 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:11,516 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:11,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-09-14 12:37:11,725 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:11,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:11,726 INFO L82 PathProgramCache]: Analyzing trace with hash 2130044846, now seen corresponding path program 16 times [2020-09-14 12:37:11,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:11,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858040842] [2020-09-14 12:37:11,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:11,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:11,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:11,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858040842] [2020-09-14 12:37:11,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405804553] [2020-09-14 12:37:11,810 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:11,862 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:37:11,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:11,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-14 12:37:11,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:11,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:11,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:11,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-14 12:37:11,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049499688] [2020-09-14 12:37:11,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-14 12:37:11,981 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:11,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-14 12:37:11,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-09-14 12:37:11,981 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-09-14 12:37:12,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:12,139 INFO L93 Difference]: Finished difference Result 131 states and 303 transitions. [2020-09-14 12:37:12,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-14 12:37:12,140 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-14 12:37:12,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:12,141 INFO L225 Difference]: With dead ends: 131 [2020-09-14 12:37:12,141 INFO L226 Difference]: Without dead ends: 129 [2020-09-14 12:37:12,142 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2020-09-14 12:37:12,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-09-14 12:37:12,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 101. [2020-09-14 12:37:12,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-14 12:37:12,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-09-14 12:37:12,147 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-09-14 12:37:12,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:12,147 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-09-14 12:37:12,147 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-14 12:37:12,147 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-09-14 12:37:12,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-14 12:37:12,148 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:12,148 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:12,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-09-14 12:37:12,358 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:12,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:12,359 INFO L82 PathProgramCache]: Analyzing trace with hash 2130066205, now seen corresponding path program 17 times [2020-09-14 12:37:12,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:12,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303291042] [2020-09-14 12:37:12,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:12,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:12,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:12,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303291042] [2020-09-14 12:37:12,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408529995] [2020-09-14 12:37:12,425 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:12,466 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:37:12,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:12,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-14 12:37:12,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:12,520 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:37:12,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:12,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:12,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-14 12:37:12,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578201907] [2020-09-14 12:37:12,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-14 12:37:12,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:12,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-14 12:37:12,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-09-14 12:37:12,530 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-09-14 12:37:12,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:12,676 INFO L93 Difference]: Finished difference Result 131 states and 311 transitions. [2020-09-14 12:37:12,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-14 12:37:12,676 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-14 12:37:12,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:12,678 INFO L225 Difference]: With dead ends: 131 [2020-09-14 12:37:12,678 INFO L226 Difference]: Without dead ends: 126 [2020-09-14 12:37:12,679 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:37:12,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-09-14 12:37:12,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 101. [2020-09-14 12:37:12,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-14 12:37:12,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-09-14 12:37:12,683 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-09-14 12:37:12,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:12,683 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-09-14 12:37:12,683 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-14 12:37:12,683 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-09-14 12:37:12,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-14 12:37:12,684 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:12,684 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:12,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:37:12,896 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:12,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:12,897 INFO L82 PathProgramCache]: Analyzing trace with hash 2130067166, now seen corresponding path program 18 times [2020-09-14 12:37:12,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:12,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810487004] [2020-09-14 12:37:12,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:12,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:12,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:12,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810487004] [2020-09-14 12:37:12,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121895320] [2020-09-14 12:37:12,961 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:13,012 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-14 12:37:13,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:13,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-14 12:37:13,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:13,080 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:37:13,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:13,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:13,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-14 12:37:13,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667329143] [2020-09-14 12:37:13,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-14 12:37:13,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:13,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-14 12:37:13,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-14 12:37:13,090 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-09-14 12:37:13,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:13,362 INFO L93 Difference]: Finished difference Result 145 states and 339 transitions. [2020-09-14 12:37:13,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-14 12:37:13,362 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-14 12:37:13,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:13,363 INFO L225 Difference]: With dead ends: 145 [2020-09-14 12:37:13,363 INFO L226 Difference]: Without dead ends: 140 [2020-09-14 12:37:13,364 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-09-14 12:37:13,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-09-14 12:37:13,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 99. [2020-09-14 12:37:13,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-14 12:37:13,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-09-14 12:37:13,367 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-09-14 12:37:13,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:13,368 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-09-14 12:37:13,368 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-14 12:37:13,368 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-09-14 12:37:13,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-14 12:37:13,368 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:13,369 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:13,577 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-09-14 12:37:13,577 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:13,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:13,578 INFO L82 PathProgramCache]: Analyzing trace with hash 2130095996, now seen corresponding path program 19 times [2020-09-14 12:37:13,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:13,578 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492196916] [2020-09-14 12:37:13,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:13,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:13,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:13,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492196916] [2020-09-14 12:37:13,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209583472] [2020-09-14 12:37:13,642 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:13,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:13,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-14 12:37:13,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:13,781 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:37:13,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:13,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:13,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-14 12:37:13,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711177481] [2020-09-14 12:37:13,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-14 12:37:13,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:13,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-14 12:37:13,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-09-14 12:37:13,794 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-09-14 12:37:14,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:14,015 INFO L93 Difference]: Finished difference Result 135 states and 315 transitions. [2020-09-14 12:37:14,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-14 12:37:14,015 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-14 12:37:14,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:14,016 INFO L225 Difference]: With dead ends: 135 [2020-09-14 12:37:14,016 INFO L226 Difference]: Without dead ends: 130 [2020-09-14 12:37:14,017 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:37:14,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-09-14 12:37:14,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 98. [2020-09-14 12:37:14,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-14 12:37:14,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 231 transitions. [2020-09-14 12:37:14,020 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 231 transitions. Word has length 11 [2020-09-14 12:37:14,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:14,020 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 231 transitions. [2020-09-14 12:37:14,020 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-14 12:37:14,021 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 231 transitions. [2020-09-14 12:37:14,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-14 12:37:14,021 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:14,021 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:14,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:37:14,222 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:14,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:14,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1822274800, now seen corresponding path program 4 times [2020-09-14 12:37:14,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:14,224 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329066177] [2020-09-14 12:37:14,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:14,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:14,306 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:14,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329066177] [2020-09-14 12:37:14,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825539906] [2020-09-14 12:37:14,306 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:14,351 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:37:14,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:14,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:37:14,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:14,452 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:37:14,474 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:14,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:14,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-09-14 12:37:14,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327126410] [2020-09-14 12:37:14,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-14 12:37:14,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:14,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-14 12:37:14,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-09-14 12:37:14,476 INFO L87 Difference]: Start difference. First operand 98 states and 231 transitions. Second operand 14 states. [2020-09-14 12:37:14,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:14,621 INFO L93 Difference]: Finished difference Result 143 states and 333 transitions. [2020-09-14 12:37:14,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-14 12:37:14,621 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2020-09-14 12:37:14,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:14,622 INFO L225 Difference]: With dead ends: 143 [2020-09-14 12:37:14,623 INFO L226 Difference]: Without dead ends: 138 [2020-09-14 12:37:14,623 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:37:14,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-09-14 12:37:14,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 105. [2020-09-14 12:37:14,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-14 12:37:14,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 257 transitions. [2020-09-14 12:37:14,626 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 257 transitions. Word has length 11 [2020-09-14 12:37:14,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:14,627 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 257 transitions. [2020-09-14 12:37:14,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-14 12:37:14,627 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 257 transitions. [2020-09-14 12:37:14,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-14 12:37:14,627 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:14,628 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:14,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-09-14 12:37:14,838 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:14,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:14,838 INFO L82 PathProgramCache]: Analyzing trace with hash 62604888, now seen corresponding path program 10 times [2020-09-14 12:37:14,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:14,839 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194405307] [2020-09-14 12:37:14,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:14,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:14,958 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:14,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194405307] [2020-09-14 12:37:14,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594083485] [2020-09-14 12:37:14,959 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:15,007 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:37:15,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:15,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:37:15,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:15,122 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:15,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:15,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-14 12:37:15,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129805293] [2020-09-14 12:37:15,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:37:15,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:15,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:37:15,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:37:15,125 INFO L87 Difference]: Start difference. First operand 105 states and 257 transitions. Second operand 13 states. [2020-09-14 12:37:15,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:15,173 INFO L93 Difference]: Finished difference Result 132 states and 311 transitions. [2020-09-14 12:37:15,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-14 12:37:15,174 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-09-14 12:37:15,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:15,175 INFO L225 Difference]: With dead ends: 132 [2020-09-14 12:37:15,175 INFO L226 Difference]: Without dead ends: 129 [2020-09-14 12:37:15,176 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:37:15,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-09-14 12:37:15,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 110. [2020-09-14 12:37:15,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-09-14 12:37:15,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-09-14 12:37:15,179 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-09-14 12:37:15,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:15,179 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-09-14 12:37:15,179 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:37:15,179 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-09-14 12:37:15,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-14 12:37:15,180 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:15,180 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:15,388 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-09-14 12:37:15,388 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:15,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:15,389 INFO L82 PathProgramCache]: Analyzing trace with hash 727540008, now seen corresponding path program 11 times [2020-09-14 12:37:15,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:15,389 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236414031] [2020-09-14 12:37:15,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:15,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:15,494 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:15,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236414031] [2020-09-14 12:37:15,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303765495] [2020-09-14 12:37:15,495 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:15,559 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-14 12:37:15,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:15,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:37:15,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:15,679 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:15,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:15,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-14 12:37:15,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544991865] [2020-09-14 12:37:15,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:37:15,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:15,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:37:15,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:37:15,693 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-09-14 12:37:15,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:15,756 INFO L93 Difference]: Finished difference Result 143 states and 332 transitions. [2020-09-14 12:37:15,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-14 12:37:15,757 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-09-14 12:37:15,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:15,758 INFO L225 Difference]: With dead ends: 143 [2020-09-14 12:37:15,758 INFO L226 Difference]: Without dead ends: 140 [2020-09-14 12:37:15,758 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-09-14 12:37:15,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-09-14 12:37:15,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 110. [2020-09-14 12:37:15,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-09-14 12:37:15,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-09-14 12:37:15,762 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-09-14 12:37:15,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:15,762 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-09-14 12:37:15,762 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:37:15,762 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-09-14 12:37:15,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-14 12:37:15,762 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:15,763 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:15,963 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-09-14 12:37:15,964 INFO L427 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:15,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:15,964 INFO L82 PathProgramCache]: Analyzing trace with hash 748989528, now seen corresponding path program 12 times [2020-09-14 12:37:15,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:15,965 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949748676] [2020-09-14 12:37:15,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:15,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:16,059 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:16,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949748676] [2020-09-14 12:37:16,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722095233] [2020-09-14 12:37:16,060 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:16,117 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-14 12:37:16,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:16,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:37:16,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:16,217 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:16,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:16,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-14 12:37:16,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615556664] [2020-09-14 12:37:16,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:37:16,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:16,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:37:16,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:37:16,220 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-09-14 12:37:16,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:16,324 INFO L93 Difference]: Finished difference Result 142 states and 332 transitions. [2020-09-14 12:37:16,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-14 12:37:16,325 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-09-14 12:37:16,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:16,326 INFO L225 Difference]: With dead ends: 142 [2020-09-14 12:37:16,326 INFO L226 Difference]: Without dead ends: 139 [2020-09-14 12:37:16,327 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:37:16,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-09-14 12:37:16,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 112. [2020-09-14 12:37:16,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-09-14 12:37:16,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 275 transitions. [2020-09-14 12:37:16,331 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 275 transitions. Word has length 11 [2020-09-14 12:37:16,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:16,331 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 275 transitions. [2020-09-14 12:37:16,331 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:37:16,331 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 275 transitions. [2020-09-14 12:37:16,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-14 12:37:16,332 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:16,332 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:16,536 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-09-14 12:37:16,536 INFO L427 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:16,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:16,537 INFO L82 PathProgramCache]: Analyzing trace with hash 749681448, now seen corresponding path program 13 times [2020-09-14 12:37:16,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:16,537 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067432348] [2020-09-14 12:37:16,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:16,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:16,629 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:16,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067432348] [2020-09-14 12:37:16,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103441478] [2020-09-14 12:37:16,629 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:16,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:16,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:37:16,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:16,819 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:16,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:16,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-14 12:37:16,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675444130] [2020-09-14 12:37:16,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:37:16,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:16,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:37:16,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:37:16,822 INFO L87 Difference]: Start difference. First operand 112 states and 275 transitions. Second operand 13 states. [2020-09-14 12:37:16,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:16,953 INFO L93 Difference]: Finished difference Result 141 states and 332 transitions. [2020-09-14 12:37:16,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-14 12:37:16,953 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-09-14 12:37:16,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:16,955 INFO L225 Difference]: With dead ends: 141 [2020-09-14 12:37:16,955 INFO L226 Difference]: Without dead ends: 138 [2020-09-14 12:37:16,955 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-09-14 12:37:16,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-09-14 12:37:16,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 114. [2020-09-14 12:37:16,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-09-14 12:37:16,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 282 transitions. [2020-09-14 12:37:16,959 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 282 transitions. Word has length 11 [2020-09-14 12:37:16,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:16,959 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 282 transitions. [2020-09-14 12:37:16,959 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:37:16,959 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 282 transitions. [2020-09-14 12:37:16,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-14 12:37:16,960 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:16,960 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:17,168 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-09-14 12:37:17,168 INFO L427 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:17,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:17,169 INFO L82 PathProgramCache]: Analyzing trace with hash 749703768, now seen corresponding path program 14 times [2020-09-14 12:37:17,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:17,169 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620290977] [2020-09-14 12:37:17,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:17,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:17,276 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:17,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620290977] [2020-09-14 12:37:17,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895202518] [2020-09-14 12:37:17,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:17,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:37:17,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:17,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:37:17,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:17,411 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:37:17,428 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:17,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:17,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-14 12:37:17,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337241605] [2020-09-14 12:37:17,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:37:17,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:17,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:37:17,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:37:17,431 INFO L87 Difference]: Start difference. First operand 114 states and 282 transitions. Second operand 13 states. [2020-09-14 12:37:17,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:17,615 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-09-14 12:37:17,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-14 12:37:17,616 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-09-14 12:37:17,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:17,617 INFO L225 Difference]: With dead ends: 150 [2020-09-14 12:37:17,617 INFO L226 Difference]: Without dead ends: 144 [2020-09-14 12:37:17,618 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-09-14 12:37:17,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-09-14 12:37:17,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 113. [2020-09-14 12:37:17,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-09-14 12:37:17,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 282 transitions. [2020-09-14 12:37:17,621 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 282 transitions. Word has length 11 [2020-09-14 12:37:17,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:17,621 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 282 transitions. [2020-09-14 12:37:17,621 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:37:17,622 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 282 transitions. [2020-09-14 12:37:17,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:37:17,622 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:17,622 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:17,831 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:37:17,831 INFO L427 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:17,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:17,832 INFO L82 PathProgramCache]: Analyzing trace with hash 920465749, now seen corresponding path program 20 times [2020-09-14 12:37:17,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:17,833 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950759472] [2020-09-14 12:37:17,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:17,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:17,938 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:17,939 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950759472] [2020-09-14 12:37:17,939 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492324707] [2020-09-14 12:37:17,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:18,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:37:18,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:18,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:37:18,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:18,125 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:18,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:18,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-14 12:37:18,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32119093] [2020-09-14 12:37:18,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:37:18,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:18,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:37:18,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:37:18,127 INFO L87 Difference]: Start difference. First operand 113 states and 282 transitions. Second operand 13 states. [2020-09-14 12:37:18,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:18,189 INFO L93 Difference]: Finished difference Result 138 states and 332 transitions. [2020-09-14 12:37:18,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-14 12:37:18,189 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-14 12:37:18,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:18,191 INFO L225 Difference]: With dead ends: 138 [2020-09-14 12:37:18,191 INFO L226 Difference]: Without dead ends: 136 [2020-09-14 12:37:18,191 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:37:18,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-09-14 12:37:18,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 117. [2020-09-14 12:37:18,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-09-14 12:37:18,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 294 transitions. [2020-09-14 12:37:18,195 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 294 transitions. Word has length 12 [2020-09-14 12:37:18,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:18,196 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 294 transitions. [2020-09-14 12:37:18,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:37:18,196 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 294 transitions. [2020-09-14 12:37:18,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:37:18,196 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:18,196 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:18,406 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-09-14 12:37:18,407 INFO L427 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:18,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:18,407 INFO L82 PathProgramCache]: Analyzing trace with hash 920466710, now seen corresponding path program 21 times [2020-09-14 12:37:18,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:18,408 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902857572] [2020-09-14 12:37:18,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:18,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:18,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:18,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902857572] [2020-09-14 12:37:18,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819442793] [2020-09-14 12:37:18,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:18,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-14 12:37:18,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:18,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:37:18,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:18,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:18,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:18,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-14 12:37:18,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683770420] [2020-09-14 12:37:18,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:37:18,674 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:18,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:37:18,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:37:18,674 INFO L87 Difference]: Start difference. First operand 117 states and 294 transitions. Second operand 13 states. [2020-09-14 12:37:18,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:18,794 INFO L93 Difference]: Finished difference Result 145 states and 346 transitions. [2020-09-14 12:37:18,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-14 12:37:18,794 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-14 12:37:18,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:18,796 INFO L225 Difference]: With dead ends: 145 [2020-09-14 12:37:18,796 INFO L226 Difference]: Without dead ends: 143 [2020-09-14 12:37:18,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2020-09-14 12:37:18,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-09-14 12:37:18,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 115. [2020-09-14 12:37:18,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-09-14 12:37:18,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 288 transitions. [2020-09-14 12:37:18,800 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 288 transitions. Word has length 12 [2020-09-14 12:37:18,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:18,800 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 288 transitions. [2020-09-14 12:37:18,800 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:37:18,800 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 288 transitions. [2020-09-14 12:37:18,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:37:18,801 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:18,801 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:19,011 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-09-14 12:37:19,011 INFO L427 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:19,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:19,012 INFO L82 PathProgramCache]: Analyzing trace with hash 920495540, now seen corresponding path program 22 times [2020-09-14 12:37:19,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:19,013 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827226958] [2020-09-14 12:37:19,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:19,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:19,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:19,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827226958] [2020-09-14 12:37:19,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121989173] [2020-09-14 12:37:19,105 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:19,153 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:37:19,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:19,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:37:19,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:19,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:19,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:19,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-14 12:37:19,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129442456] [2020-09-14 12:37:19,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:37:19,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:19,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:37:19,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:37:19,262 INFO L87 Difference]: Start difference. First operand 115 states and 288 transitions. Second operand 13 states. [2020-09-14 12:37:19,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:19,407 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-09-14 12:37:19,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-14 12:37:19,408 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-14 12:37:19,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:19,409 INFO L225 Difference]: With dead ends: 150 [2020-09-14 12:37:19,409 INFO L226 Difference]: Without dead ends: 148 [2020-09-14 12:37:19,410 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:37:19,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-09-14 12:37:19,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 116. [2020-09-14 12:37:19,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-09-14 12:37:19,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 289 transitions. [2020-09-14 12:37:19,413 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 289 transitions. Word has length 12 [2020-09-14 12:37:19,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:19,414 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 289 transitions. [2020-09-14 12:37:19,414 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:37:19,414 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 289 transitions. [2020-09-14 12:37:19,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:37:19,415 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:19,415 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:19,627 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:37:19,627 INFO L427 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:19,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:19,628 INFO L82 PathProgramCache]: Analyzing trace with hash 921389270, now seen corresponding path program 23 times [2020-09-14 12:37:19,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:19,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26128938] [2020-09-14 12:37:19,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:19,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:19,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:19,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26128938] [2020-09-14 12:37:19,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374440755] [2020-09-14 12:37:19,734 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:19,784 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-14 12:37:19,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:19,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:37:19,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:19,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:19,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:19,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-14 12:37:19,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811059482] [2020-09-14 12:37:19,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:37:19,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:19,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:37:19,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:37:19,932 INFO L87 Difference]: Start difference. First operand 116 states and 289 transitions. Second operand 13 states. [2020-09-14 12:37:20,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:20,041 INFO L93 Difference]: Finished difference Result 148 states and 352 transitions. [2020-09-14 12:37:20,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-14 12:37:20,041 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-14 12:37:20,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:20,042 INFO L225 Difference]: With dead ends: 148 [2020-09-14 12:37:20,042 INFO L226 Difference]: Without dead ends: 146 [2020-09-14 12:37:20,043 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:37:20,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-09-14 12:37:20,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 120. [2020-09-14 12:37:20,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-14 12:37:20,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-09-14 12:37:20,046 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-09-14 12:37:20,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:20,046 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-09-14 12:37:20,046 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:37:20,047 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-09-14 12:37:20,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:37:20,048 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:20,048 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:20,257 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-09-14 12:37:20,258 INFO L427 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:20,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:20,258 INFO L82 PathProgramCache]: Analyzing trace with hash 921390231, now seen corresponding path program 24 times [2020-09-14 12:37:20,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:20,259 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127796773] [2020-09-14 12:37:20,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:20,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:20,367 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:20,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127796773] [2020-09-14 12:37:20,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183644110] [2020-09-14 12:37:20,368 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:20,416 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-14 12:37:20,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:20,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:37:20,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:20,531 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:20,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:20,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-14 12:37:20,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091254122] [2020-09-14 12:37:20,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:37:20,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:20,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:37:20,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:37:20,533 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-09-14 12:37:20,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:20,685 INFO L93 Difference]: Finished difference Result 149 states and 354 transitions. [2020-09-14 12:37:20,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-14 12:37:20,686 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-14 12:37:20,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:20,687 INFO L225 Difference]: With dead ends: 149 [2020-09-14 12:37:20,687 INFO L226 Difference]: Without dead ends: 147 [2020-09-14 12:37:20,687 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:37:20,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-09-14 12:37:20,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 118. [2020-09-14 12:37:20,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-09-14 12:37:20,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 293 transitions. [2020-09-14 12:37:20,691 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 293 transitions. Word has length 12 [2020-09-14 12:37:20,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:20,691 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 293 transitions. [2020-09-14 12:37:20,691 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:37:20,691 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 293 transitions. [2020-09-14 12:37:20,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:37:20,692 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:20,692 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:20,900 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:37:20,900 INFO L427 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:20,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:20,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1557695239, now seen corresponding path program 25 times [2020-09-14 12:37:20,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:20,901 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824749760] [2020-09-14 12:37:20,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:20,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:21,015 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:21,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824749760] [2020-09-14 12:37:21,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112324971] [2020-09-14 12:37:21,015 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:21,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:21,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:37:21,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:21,204 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:21,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:21,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-14 12:37:21,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912942683] [2020-09-14 12:37:21,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:37:21,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:21,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:37:21,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:37:21,206 INFO L87 Difference]: Start difference. First operand 118 states and 293 transitions. Second operand 13 states. [2020-09-14 12:37:21,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:21,274 INFO L93 Difference]: Finished difference Result 152 states and 360 transitions. [2020-09-14 12:37:21,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-14 12:37:21,275 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-14 12:37:21,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:21,276 INFO L225 Difference]: With dead ends: 152 [2020-09-14 12:37:21,276 INFO L226 Difference]: Without dead ends: 150 [2020-09-14 12:37:21,276 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-09-14 12:37:21,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-09-14 12:37:21,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 122. [2020-09-14 12:37:21,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-09-14 12:37:21,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 305 transitions. [2020-09-14 12:37:21,281 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 305 transitions. Word has length 12 [2020-09-14 12:37:21,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:21,282 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 305 transitions. [2020-09-14 12:37:21,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:37:21,282 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 305 transitions. [2020-09-14 12:37:21,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:37:21,282 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:21,283 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:21,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-09-14 12:37:21,493 INFO L427 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:21,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:21,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1557696200, now seen corresponding path program 26 times [2020-09-14 12:37:21,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:21,494 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333651038] [2020-09-14 12:37:21,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:21,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:21,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:21,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333651038] [2020-09-14 12:37:21,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178951566] [2020-09-14 12:37:21,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:21,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:37:21,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:21,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:37:21,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:21,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:21,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:21,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-14 12:37:21,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165705855] [2020-09-14 12:37:21,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:37:21,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:21,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:37:21,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:37:21,777 INFO L87 Difference]: Start difference. First operand 122 states and 305 transitions. Second operand 13 states. [2020-09-14 12:37:21,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:21,922 INFO L93 Difference]: Finished difference Result 153 states and 361 transitions. [2020-09-14 12:37:21,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-14 12:37:21,923 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-14 12:37:21,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:21,924 INFO L225 Difference]: With dead ends: 153 [2020-09-14 12:37:21,924 INFO L226 Difference]: Without dead ends: 151 [2020-09-14 12:37:21,925 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:37:21,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-09-14 12:37:21,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 120. [2020-09-14 12:37:21,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-14 12:37:21,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-09-14 12:37:21,938 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-09-14 12:37:21,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:21,938 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-09-14 12:37:21,938 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:37:21,938 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-09-14 12:37:21,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:37:21,938 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:21,938 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:22,139 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-09-14 12:37:22,139 INFO L427 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:22,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:22,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1557725030, now seen corresponding path program 27 times [2020-09-14 12:37:22,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:22,141 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126458648] [2020-09-14 12:37:22,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:22,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:22,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:22,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126458648] [2020-09-14 12:37:22,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240005053] [2020-09-14 12:37:22,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:22,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-14 12:37:22,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:22,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:37:22,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:22,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:22,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:22,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-14 12:37:22,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428496221] [2020-09-14 12:37:22,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:37:22,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:22,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:37:22,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:37:22,410 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-09-14 12:37:22,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:22,599 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-09-14 12:37:22,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-14 12:37:22,600 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-14 12:37:22,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:22,601 INFO L225 Difference]: With dead ends: 156 [2020-09-14 12:37:22,601 INFO L226 Difference]: Without dead ends: 154 [2020-09-14 12:37:22,602 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-09-14 12:37:22,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-09-14 12:37:22,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 119. [2020-09-14 12:37:22,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-09-14 12:37:22,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 295 transitions. [2020-09-14 12:37:22,606 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 295 transitions. Word has length 12 [2020-09-14 12:37:22,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:22,607 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 295 transitions. [2020-09-14 12:37:22,607 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:37:22,607 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 295 transitions. [2020-09-14 12:37:22,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:37:22,608 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:22,608 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:22,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-09-14 12:37:22,815 INFO L427 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:22,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:22,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1578251029, now seen corresponding path program 28 times [2020-09-14 12:37:22,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:22,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503605878] [2020-09-14 12:37:22,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:22,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:22,911 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:22,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503605878] [2020-09-14 12:37:22,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361703771] [2020-09-14 12:37:22,912 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:22,969 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:37:22,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:22,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:37:22,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:23,087 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:23,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:23,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-14 12:37:23,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907708196] [2020-09-14 12:37:23,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:37:23,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:23,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:37:23,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:37:23,089 INFO L87 Difference]: Start difference. First operand 119 states and 295 transitions. Second operand 13 states. [2020-09-14 12:37:23,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:23,184 INFO L93 Difference]: Finished difference Result 148 states and 351 transitions. [2020-09-14 12:37:23,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-14 12:37:23,185 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-14 12:37:23,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:23,186 INFO L225 Difference]: With dead ends: 148 [2020-09-14 12:37:23,186 INFO L226 Difference]: Without dead ends: 146 [2020-09-14 12:37:23,187 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:37:23,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-09-14 12:37:23,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 121. [2020-09-14 12:37:23,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-14 12:37:23,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-09-14 12:37:23,191 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-09-14 12:37:23,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:23,191 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-09-14 12:37:23,191 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:37:23,191 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-09-14 12:37:23,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:37:23,192 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:23,192 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:23,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-09-14 12:37:23,403 INFO L427 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:23,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:23,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1578251990, now seen corresponding path program 29 times [2020-09-14 12:37:23,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:23,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751632103] [2020-09-14 12:37:23,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:23,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:23,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:23,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751632103] [2020-09-14 12:37:23,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619885756] [2020-09-14 12:37:23,494 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:23,545 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:37:23,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:23,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:37:23,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:23,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:23,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:23,663 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-14 12:37:23,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064828629] [2020-09-14 12:37:23,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:37:23,664 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:23,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:37:23,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:37:23,664 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-09-14 12:37:23,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:23,813 INFO L93 Difference]: Finished difference Result 157 states and 368 transitions. [2020-09-14 12:37:23,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-14 12:37:23,814 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-14 12:37:23,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:23,815 INFO L225 Difference]: With dead ends: 157 [2020-09-14 12:37:23,815 INFO L226 Difference]: Without dead ends: 155 [2020-09-14 12:37:23,815 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-09-14 12:37:23,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-09-14 12:37:23,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 120. [2020-09-14 12:37:23,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-14 12:37:23,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 297 transitions. [2020-09-14 12:37:23,819 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 297 transitions. Word has length 12 [2020-09-14 12:37:23,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:23,820 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 297 transitions. [2020-09-14 12:37:23,820 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:37:23,820 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 297 transitions. [2020-09-14 12:37:23,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:37:23,821 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:23,821 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:24,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:37:24,032 INFO L427 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:24,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:24,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1578914119, now seen corresponding path program 30 times [2020-09-14 12:37:24,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:24,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363698950] [2020-09-14 12:37:24,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:24,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:24,131 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:24,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363698950] [2020-09-14 12:37:24,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532656853] [2020-09-14 12:37:24,132 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:24,183 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-14 12:37:24,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:24,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:37:24,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:24,210 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:24,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:24,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-14 12:37:24,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899836186] [2020-09-14 12:37:24,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-14 12:37:24,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:24,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-14 12:37:24,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-09-14 12:37:24,212 INFO L87 Difference]: Start difference. First operand 120 states and 297 transitions. Second operand 9 states. [2020-09-14 12:37:24,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:24,324 INFO L93 Difference]: Finished difference Result 149 states and 350 transitions. [2020-09-14 12:37:24,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-14 12:37:24,325 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-14 12:37:24,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:24,327 INFO L225 Difference]: With dead ends: 149 [2020-09-14 12:37:24,327 INFO L226 Difference]: Without dead ends: 147 [2020-09-14 12:37:24,327 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2020-09-14 12:37:24,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-09-14 12:37:24,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 124. [2020-09-14 12:37:24,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-09-14 12:37:24,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-09-14 12:37:24,332 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-09-14 12:37:24,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:24,332 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-09-14 12:37:24,332 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-14 12:37:24,332 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-09-14 12:37:24,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:37:24,333 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:24,333 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:24,544 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-09-14 12:37:24,544 INFO L427 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:24,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:24,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1578936439, now seen corresponding path program 31 times [2020-09-14 12:37:24,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:24,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692310296] [2020-09-14 12:37:24,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:24,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:24,634 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:24,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692310296] [2020-09-14 12:37:24,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468374818] [2020-09-14 12:37:24,635 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:24,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:24,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:37:24,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:24,784 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:37:24,819 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:24,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:24,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-14 12:37:24,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825986467] [2020-09-14 12:37:24,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:37:24,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:24,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:37:24,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:37:24,820 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-09-14 12:37:25,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:25,069 INFO L93 Difference]: Finished difference Result 164 states and 389 transitions. [2020-09-14 12:37:25,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-14 12:37:25,069 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-14 12:37:25,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:25,070 INFO L225 Difference]: With dead ends: 164 [2020-09-14 12:37:25,071 INFO L226 Difference]: Without dead ends: 159 [2020-09-14 12:37:25,071 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-09-14 12:37:25,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-09-14 12:37:25,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-09-14 12:37:25,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-09-14 12:37:25,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 296 transitions. [2020-09-14 12:37:25,074 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 296 transitions. Word has length 12 [2020-09-14 12:37:25,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:25,074 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 296 transitions. [2020-09-14 12:37:25,075 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:37:25,075 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 296 transitions. [2020-09-14 12:37:25,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:37:25,075 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:25,075 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:25,276 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-09-14 12:37:25,276 INFO L427 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:25,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:25,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1578943910, now seen corresponding path program 32 times [2020-09-14 12:37:25,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:25,277 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910900666] [2020-09-14 12:37:25,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:25,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:25,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:25,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910900666] [2020-09-14 12:37:25,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365282144] [2020-09-14 12:37:25,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:25,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:37:25,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:25,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:37:25,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:25,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:25,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:25,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-14 12:37:25,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282082951] [2020-09-14 12:37:25,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:37:25,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:25,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:37:25,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:37:25,540 INFO L87 Difference]: Start difference. First operand 122 states and 296 transitions. Second operand 13 states. [2020-09-14 12:37:25,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:25,769 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-09-14 12:37:25,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-14 12:37:25,770 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-14 12:37:25,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:25,772 INFO L225 Difference]: With dead ends: 156 [2020-09-14 12:37:25,772 INFO L226 Difference]: Without dead ends: 154 [2020-09-14 12:37:25,772 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:37:25,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-09-14 12:37:25,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 124. [2020-09-14 12:37:25,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-09-14 12:37:25,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-09-14 12:37:25,778 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-09-14 12:37:25,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:25,779 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-09-14 12:37:25,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:37:25,780 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-09-14 12:37:25,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:37:25,781 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:25,781 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:25,981 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:37:25,982 INFO L427 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:25,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:25,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1578965269, now seen corresponding path program 33 times [2020-09-14 12:37:25,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:25,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960205938] [2020-09-14 12:37:25,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:25,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:26,062 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:26,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960205938] [2020-09-14 12:37:26,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177558412] [2020-09-14 12:37:26,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:26,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-14 12:37:26,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:26,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:37:26,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:26,222 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:37:26,261 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:26,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:26,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-14 12:37:26,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920436722] [2020-09-14 12:37:26,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:37:26,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:26,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:37:26,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:37:26,263 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-09-14 12:37:26,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:26,689 INFO L93 Difference]: Finished difference Result 176 states and 416 transitions. [2020-09-14 12:37:26,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-14 12:37:26,690 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-14 12:37:26,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:26,692 INFO L225 Difference]: With dead ends: 176 [2020-09-14 12:37:26,692 INFO L226 Difference]: Without dead ends: 171 [2020-09-14 12:37:26,692 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=186, Invalid=366, Unknown=0, NotChecked=0, Total=552 [2020-09-14 12:37:26,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-09-14 12:37:26,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 124. [2020-09-14 12:37:26,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-09-14 12:37:26,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-09-14 12:37:26,696 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-09-14 12:37:26,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:26,697 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-09-14 12:37:26,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:37:26,697 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-09-14 12:37:26,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:37:26,697 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:26,698 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:26,909 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-09-14 12:37:26,909 INFO L427 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:26,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:26,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1578966230, now seen corresponding path program 34 times [2020-09-14 12:37:26,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:26,910 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423296497] [2020-09-14 12:37:26,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:26,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:26,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:26,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423296497] [2020-09-14 12:37:26,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630986783] [2020-09-14 12:37:26,991 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:27,042 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:37:27,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:27,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:37:27,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:27,136 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:37:27,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:27,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:27,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-14 12:37:27,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516672391] [2020-09-14 12:37:27,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:37:27,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:27,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:37:27,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:37:27,181 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-09-14 12:37:27,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:27,479 INFO L93 Difference]: Finished difference Result 166 states and 393 transitions. [2020-09-14 12:37:27,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-14 12:37:27,480 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-14 12:37:27,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:27,482 INFO L225 Difference]: With dead ends: 166 [2020-09-14 12:37:27,482 INFO L226 Difference]: Without dead ends: 161 [2020-09-14 12:37:27,482 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-09-14 12:37:27,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-09-14 12:37:27,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 121. [2020-09-14 12:37:27,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-14 12:37:27,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 294 transitions. [2020-09-14 12:37:27,486 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 294 transitions. Word has length 12 [2020-09-14 12:37:27,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:27,487 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 294 transitions. [2020-09-14 12:37:27,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:37:27,487 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 294 transitions. [2020-09-14 12:37:27,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:37:27,487 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:27,488 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:27,698 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:37:27,698 INFO L427 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:27,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:27,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1579174550, now seen corresponding path program 35 times [2020-09-14 12:37:27,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:27,700 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033405316] [2020-09-14 12:37:27,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:27,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:27,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:27,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033405316] [2020-09-14 12:37:27,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327314469] [2020-09-14 12:37:27,776 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:27,835 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:37:27,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:27,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:37:27,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:27,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:27,978 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:27,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-14 12:37:27,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795656430] [2020-09-14 12:37:27,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:37:27,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:27,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:37:27,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:37:27,980 INFO L87 Difference]: Start difference. First operand 121 states and 294 transitions. Second operand 13 states. [2020-09-14 12:37:28,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:28,191 INFO L93 Difference]: Finished difference Result 163 states and 379 transitions. [2020-09-14 12:37:28,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-14 12:37:28,192 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-14 12:37:28,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:28,193 INFO L225 Difference]: With dead ends: 163 [2020-09-14 12:37:28,193 INFO L226 Difference]: Without dead ends: 161 [2020-09-14 12:37:28,193 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:37:28,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-09-14 12:37:28,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 123. [2020-09-14 12:37:28,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-09-14 12:37:28,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 301 transitions. [2020-09-14 12:37:28,197 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 301 transitions. Word has length 12 [2020-09-14 12:37:28,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:28,198 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 301 transitions. [2020-09-14 12:37:28,198 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:37:28,198 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 301 transitions. [2020-09-14 12:37:28,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:37:28,199 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:28,199 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:28,410 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-09-14 12:37:28,410 INFO L427 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:28,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:28,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1579837640, now seen corresponding path program 36 times [2020-09-14 12:37:28,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:28,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329175410] [2020-09-14 12:37:28,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:28,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:28,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:28,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329175410] [2020-09-14 12:37:28,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294567560] [2020-09-14 12:37:28,492 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:28,545 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-14 12:37:28,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:28,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:37:28,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:28,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:28,645 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:28,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-14 12:37:28,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985330438] [2020-09-14 12:37:28,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:37:28,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:28,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:37:28,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:37:28,646 INFO L87 Difference]: Start difference. First operand 123 states and 301 transitions. Second operand 13 states. [2020-09-14 12:37:28,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:28,970 INFO L93 Difference]: Finished difference Result 170 states and 399 transitions. [2020-09-14 12:37:28,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-14 12:37:28,971 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-14 12:37:28,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:28,972 INFO L225 Difference]: With dead ends: 170 [2020-09-14 12:37:28,972 INFO L226 Difference]: Without dead ends: 168 [2020-09-14 12:37:28,973 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2020-09-14 12:37:28,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-09-14 12:37:28,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 125. [2020-09-14 12:37:28,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-09-14 12:37:28,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 308 transitions. [2020-09-14 12:37:28,976 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 308 transitions. Word has length 12 [2020-09-14 12:37:28,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:28,976 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 308 transitions. [2020-09-14 12:37:28,976 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:37:28,977 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 308 transitions. [2020-09-14 12:37:28,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:37:28,977 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:28,977 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:29,187 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:37:29,187 INFO L427 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:29,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:29,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1579858999, now seen corresponding path program 37 times [2020-09-14 12:37:29,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:29,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186678293] [2020-09-14 12:37:29,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:29,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:29,262 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:29,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186678293] [2020-09-14 12:37:29,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413348695] [2020-09-14 12:37:29,263 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:29,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:29,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:37:29,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:29,414 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:37:29,425 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:29,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:29,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-14 12:37:29,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567325573] [2020-09-14 12:37:29,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:37:29,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:29,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:37:29,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:37:29,427 INFO L87 Difference]: Start difference. First operand 125 states and 308 transitions. Second operand 13 states. [2020-09-14 12:37:29,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:29,741 INFO L93 Difference]: Finished difference Result 177 states and 424 transitions. [2020-09-14 12:37:29,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-14 12:37:29,742 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-14 12:37:29,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:29,743 INFO L225 Difference]: With dead ends: 177 [2020-09-14 12:37:29,743 INFO L226 Difference]: Without dead ends: 172 [2020-09-14 12:37:29,743 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-09-14 12:37:29,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-09-14 12:37:29,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 126. [2020-09-14 12:37:29,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-09-14 12:37:29,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 313 transitions. [2020-09-14 12:37:29,749 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 313 transitions. Word has length 12 [2020-09-14 12:37:29,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:29,749 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 313 transitions. [2020-09-14 12:37:29,750 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:37:29,750 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 313 transitions. [2020-09-14 12:37:29,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:37:29,750 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:29,750 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:29,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-09-14 12:37:29,959 INFO L427 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:29,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:29,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1579859960, now seen corresponding path program 38 times [2020-09-14 12:37:29,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:29,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804095771] [2020-09-14 12:37:29,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:29,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:30,034 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:30,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804095771] [2020-09-14 12:37:30,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424125238] [2020-09-14 12:37:30,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:30,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:37:30,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:30,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:37:30,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:30,166 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:37:30,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:30,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:30,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-14 12:37:30,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419134798] [2020-09-14 12:37:30,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:37:30,187 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:30,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:37:30,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:37:30,187 INFO L87 Difference]: Start difference. First operand 126 states and 313 transitions. Second operand 13 states. [2020-09-14 12:37:30,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:30,634 INFO L93 Difference]: Finished difference Result 190 states and 454 transitions. [2020-09-14 12:37:30,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-14 12:37:30,634 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-14 12:37:30,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:30,636 INFO L225 Difference]: With dead ends: 190 [2020-09-14 12:37:30,636 INFO L226 Difference]: Without dead ends: 182 [2020-09-14 12:37:30,636 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-09-14 12:37:30,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-09-14 12:37:30,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 121. [2020-09-14 12:37:30,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-14 12:37:30,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 297 transitions. [2020-09-14 12:37:30,639 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 297 transitions. Word has length 12 [2020-09-14 12:37:30,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:30,639 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 297 transitions. [2020-09-14 12:37:30,639 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:37:30,640 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 297 transitions. [2020-09-14 12:37:30,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:37:30,640 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:30,640 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:30,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-09-14 12:37:30,841 INFO L427 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:30,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:30,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1579888790, now seen corresponding path program 39 times [2020-09-14 12:37:30,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:30,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365586260] [2020-09-14 12:37:30,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:30,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:30,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:30,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365586260] [2020-09-14 12:37:30,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926336435] [2020-09-14 12:37:30,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:30,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-14 12:37:30,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:30,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:37:30,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:31,058 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:37:31,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:31,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:31,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-14 12:37:31,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108278805] [2020-09-14 12:37:31,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:37:31,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:31,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:37:31,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:37:31,071 INFO L87 Difference]: Start difference. First operand 121 states and 297 transitions. Second operand 13 states. [2020-09-14 12:37:31,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:31,457 INFO L93 Difference]: Finished difference Result 180 states and 427 transitions. [2020-09-14 12:37:31,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-14 12:37:31,465 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-14 12:37:31,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:31,467 INFO L225 Difference]: With dead ends: 180 [2020-09-14 12:37:31,467 INFO L226 Difference]: Without dead ends: 175 [2020-09-14 12:37:31,467 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-09-14 12:37:31,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-09-14 12:37:31,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 120. [2020-09-14 12:37:31,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-14 12:37:31,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 292 transitions. [2020-09-14 12:37:31,470 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 292 transitions. Word has length 12 [2020-09-14 12:37:31,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:31,471 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 292 transitions. [2020-09-14 12:37:31,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:37:31,471 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 292 transitions. [2020-09-14 12:37:31,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:37:31,471 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:31,471 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:31,676 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-09-14 12:37:31,677 INFO L427 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:31,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:31,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1586324390, now seen corresponding path program 40 times [2020-09-14 12:37:31,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:31,678 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965297898] [2020-09-14 12:37:31,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:31,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:31,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:31,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965297898] [2020-09-14 12:37:31,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323660659] [2020-09-14 12:37:31,770 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:31,821 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:37:31,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:31,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:37:31,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:31,938 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:31,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:31,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-14 12:37:31,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936678716] [2020-09-14 12:37:31,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:37:31,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:31,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:37:31,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:37:31,940 INFO L87 Difference]: Start difference. First operand 120 states and 292 transitions. Second operand 13 states. [2020-09-14 12:37:32,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:32,117 INFO L93 Difference]: Finished difference Result 164 states and 379 transitions. [2020-09-14 12:37:32,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-14 12:37:32,117 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-14 12:37:32,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:32,118 INFO L225 Difference]: With dead ends: 164 [2020-09-14 12:37:32,119 INFO L226 Difference]: Without dead ends: 162 [2020-09-14 12:37:32,119 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2020-09-14 12:37:32,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-09-14 12:37:32,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 121. [2020-09-14 12:37:32,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-14 12:37:32,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 295 transitions. [2020-09-14 12:37:32,121 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 295 transitions. Word has length 12 [2020-09-14 12:37:32,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:32,121 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 295 transitions. [2020-09-14 12:37:32,121 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:37:32,121 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 295 transitions. [2020-09-14 12:37:32,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:37:32,122 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:32,122 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:32,323 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-09-14 12:37:32,324 INFO L427 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:32,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:32,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1586325351, now seen corresponding path program 41 times [2020-09-14 12:37:32,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:32,325 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905126687] [2020-09-14 12:37:32,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:32,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:32,415 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:32,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905126687] [2020-09-14 12:37:32,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905409781] [2020-09-14 12:37:32,416 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:32,465 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:37:32,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:32,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:37:32,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:32,573 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:32,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:32,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-14 12:37:32,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588545396] [2020-09-14 12:37:32,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:37:32,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:32,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:37:32,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:37:32,575 INFO L87 Difference]: Start difference. First operand 121 states and 295 transitions. Second operand 13 states. [2020-09-14 12:37:32,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:32,761 INFO L93 Difference]: Finished difference Result 161 states and 372 transitions. [2020-09-14 12:37:32,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-14 12:37:32,762 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-14 12:37:32,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:32,763 INFO L225 Difference]: With dead ends: 161 [2020-09-14 12:37:32,763 INFO L226 Difference]: Without dead ends: 159 [2020-09-14 12:37:32,764 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-09-14 12:37:32,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-09-14 12:37:32,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 118. [2020-09-14 12:37:32,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-09-14 12:37:32,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 287 transitions. [2020-09-14 12:37:32,766 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 287 transitions. Word has length 12 [2020-09-14 12:37:32,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:32,767 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 287 transitions. [2020-09-14 12:37:32,767 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:37:32,767 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 287 transitions. [2020-09-14 12:37:32,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:37:32,767 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:32,767 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:32,968 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-09-14 12:37:32,968 INFO L427 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:32,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:32,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1606880180, now seen corresponding path program 42 times [2020-09-14 12:37:32,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:32,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176280814] [2020-09-14 12:37:32,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:32,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:33,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:33,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176280814] [2020-09-14 12:37:33,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047950925] [2020-09-14 12:37:33,045 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:33,085 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-14 12:37:33,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:33,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:37:33,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:33,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:33,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:33,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-14 12:37:33,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822882880] [2020-09-14 12:37:33,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:37:33,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:33,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:37:33,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:37:33,195 INFO L87 Difference]: Start difference. First operand 118 states and 287 transitions. Second operand 13 states. [2020-09-14 12:37:33,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:33,423 INFO L93 Difference]: Finished difference Result 165 states and 380 transitions. [2020-09-14 12:37:33,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-14 12:37:33,423 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-14 12:37:33,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:33,425 INFO L225 Difference]: With dead ends: 165 [2020-09-14 12:37:33,425 INFO L226 Difference]: Without dead ends: 163 [2020-09-14 12:37:33,425 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2020-09-14 12:37:33,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-09-14 12:37:33,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 118. [2020-09-14 12:37:33,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-09-14 12:37:33,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 290 transitions. [2020-09-14 12:37:33,428 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 290 transitions. Word has length 12 [2020-09-14 12:37:33,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:33,428 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 290 transitions. [2020-09-14 12:37:33,428 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:37:33,428 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 290 transitions. [2020-09-14 12:37:33,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:37:33,429 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:33,429 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:33,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2020-09-14 12:37:33,630 INFO L427 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:33,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:33,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1606881141, now seen corresponding path program 43 times [2020-09-14 12:37:33,631 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:33,631 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146615841] [2020-09-14 12:37:33,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:33,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:33,711 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:33,712 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146615841] [2020-09-14 12:37:33,712 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592255223] [2020-09-14 12:37:33,712 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:33,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:33,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:37:33,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:33,875 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:33,876 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:33,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-14 12:37:33,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125459483] [2020-09-14 12:37:33,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:37:33,877 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:33,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:37:33,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:37:33,878 INFO L87 Difference]: Start difference. First operand 118 states and 290 transitions. Second operand 13 states. [2020-09-14 12:37:34,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:34,121 INFO L93 Difference]: Finished difference Result 167 states and 384 transitions. [2020-09-14 12:37:34,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-14 12:37:34,122 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-14 12:37:34,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:34,123 INFO L225 Difference]: With dead ends: 167 [2020-09-14 12:37:34,123 INFO L226 Difference]: Without dead ends: 165 [2020-09-14 12:37:34,124 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-09-14 12:37:34,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-09-14 12:37:34,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 118. [2020-09-14 12:37:34,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-09-14 12:37:34,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-09-14 12:37:34,127 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-09-14 12:37:34,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:34,127 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-09-14 12:37:34,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:37:34,128 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-09-14 12:37:34,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:37:34,128 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:34,128 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:34,334 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:37:34,335 INFO L427 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:34,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:34,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1607543270, now seen corresponding path program 44 times [2020-09-14 12:37:34,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:34,336 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327428677] [2020-09-14 12:37:34,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:34,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:34,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:34,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327428677] [2020-09-14 12:37:34,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606471849] [2020-09-14 12:37:34,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:34,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:37:34,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:34,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:37:34,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:34,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:34,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:34,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-14 12:37:34,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885157918] [2020-09-14 12:37:34,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:37:34,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:34,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:37:34,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:37:34,558 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-09-14 12:37:34,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:34,872 INFO L93 Difference]: Finished difference Result 168 states and 392 transitions. [2020-09-14 12:37:34,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-14 12:37:34,873 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-14 12:37:34,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:34,875 INFO L225 Difference]: With dead ends: 168 [2020-09-14 12:37:34,875 INFO L226 Difference]: Without dead ends: 166 [2020-09-14 12:37:34,875 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2020-09-14 12:37:34,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-09-14 12:37:34,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 120. [2020-09-14 12:37:34,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-14 12:37:34,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-09-14 12:37:34,879 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-09-14 12:37:34,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:34,879 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-09-14 12:37:34,879 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:37:34,879 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-09-14 12:37:34,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:37:34,880 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:34,880 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:35,083 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:37:35,083 INFO L427 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:35,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:35,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1607564629, now seen corresponding path program 45 times [2020-09-14 12:37:35,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:35,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125066470] [2020-09-14 12:37:35,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:35,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:35,171 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:35,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125066470] [2020-09-14 12:37:35,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380458419] [2020-09-14 12:37:35,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:35,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-14 12:37:35,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:35,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:37:35,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:35,309 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:37:35,320 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:35,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:35,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-14 12:37:35,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258989194] [2020-09-14 12:37:35,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:37:35,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:35,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:37:35,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:37:35,322 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-09-14 12:37:35,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:35,554 INFO L93 Difference]: Finished difference Result 160 states and 384 transitions. [2020-09-14 12:37:35,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-14 12:37:35,554 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-14 12:37:35,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:35,556 INFO L225 Difference]: With dead ends: 160 [2020-09-14 12:37:35,556 INFO L226 Difference]: Without dead ends: 155 [2020-09-14 12:37:35,557 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-09-14 12:37:35,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-09-14 12:37:35,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 121. [2020-09-14 12:37:35,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-14 12:37:35,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-09-14 12:37:35,560 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-09-14 12:37:35,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:35,560 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-09-14 12:37:35,560 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:37:35,560 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-09-14 12:37:35,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:37:35,561 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:35,561 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:35,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:37:35,762 INFO L427 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:35,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:35,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1607565590, now seen corresponding path program 46 times [2020-09-14 12:37:35,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:35,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498238996] [2020-09-14 12:37:35,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:35,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:35,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:35,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498238996] [2020-09-14 12:37:35,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849978420] [2020-09-14 12:37:35,840 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:35,890 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:37:35,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:35,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:37:35,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:35,986 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:37:36,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:36,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:36,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-14 12:37:36,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280101802] [2020-09-14 12:37:36,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:37:36,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:36,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:37:36,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:37:36,029 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-09-14 12:37:36,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:36,435 INFO L93 Difference]: Finished difference Result 189 states and 444 transitions. [2020-09-14 12:37:36,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-14 12:37:36,436 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-14 12:37:36,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:36,437 INFO L225 Difference]: With dead ends: 189 [2020-09-14 12:37:36,437 INFO L226 Difference]: Without dead ends: 181 [2020-09-14 12:37:36,438 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-09-14 12:37:36,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-09-14 12:37:36,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 118. [2020-09-14 12:37:36,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-09-14 12:37:36,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-09-14 12:37:36,441 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-09-14 12:37:36,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:36,441 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-09-14 12:37:36,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:37:36,442 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-09-14 12:37:36,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:37:36,442 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:36,442 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:36,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:37:36,643 INFO L427 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:36,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:36,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1607573061, now seen corresponding path program 47 times [2020-09-14 12:37:36,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:36,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928505645] [2020-09-14 12:37:36,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:36,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:36,730 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:36,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928505645] [2020-09-14 12:37:36,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104685323] [2020-09-14 12:37:36,731 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:36,784 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:37:36,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:36,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:37:36,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:36,880 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:36,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:36,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-14 12:37:36,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160594040] [2020-09-14 12:37:36,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:37:36,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:36,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:37:36,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:37:36,882 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-09-14 12:37:37,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:37,177 INFO L93 Difference]: Finished difference Result 169 states and 393 transitions. [2020-09-14 12:37:37,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-14 12:37:37,177 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-14 12:37:37,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:37,179 INFO L225 Difference]: With dead ends: 169 [2020-09-14 12:37:37,179 INFO L226 Difference]: Without dead ends: 167 [2020-09-14 12:37:37,179 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-09-14 12:37:37,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-09-14 12:37:37,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 120. [2020-09-14 12:37:37,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-14 12:37:37,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-09-14 12:37:37,182 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-09-14 12:37:37,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:37,183 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-09-14 12:37:37,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:37:37,183 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-09-14 12:37:37,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:37:37,183 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:37,183 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:37,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2020-09-14 12:37:37,385 INFO L427 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:37,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:37,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1607594420, now seen corresponding path program 48 times [2020-09-14 12:37:37,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:37,387 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73427036] [2020-09-14 12:37:37,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:37,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:37,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:37,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73427036] [2020-09-14 12:37:37,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020537525] [2020-09-14 12:37:37,471 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:37,522 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-14 12:37:37,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:37,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:37:37,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:37,603 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:37:37,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:37,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:37,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-14 12:37:37,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121108468] [2020-09-14 12:37:37,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:37:37,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:37,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:37:37,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:37:37,614 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-09-14 12:37:37,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:37,992 INFO L93 Difference]: Finished difference Result 192 states and 454 transitions. [2020-09-14 12:37:37,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-14 12:37:37,992 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-14 12:37:37,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:37,994 INFO L225 Difference]: With dead ends: 192 [2020-09-14 12:37:37,994 INFO L226 Difference]: Without dead ends: 184 [2020-09-14 12:37:37,994 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-09-14 12:37:37,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-09-14 12:37:37,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 119. [2020-09-14 12:37:37,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-09-14 12:37:37,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 287 transitions. [2020-09-14 12:37:37,998 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 287 transitions. Word has length 12 [2020-09-14 12:37:37,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:37,998 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 287 transitions. [2020-09-14 12:37:37,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:37:37,999 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 287 transitions. [2020-09-14 12:37:37,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:37:37,999 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:37,999 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:38,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:37:38,200 INFO L427 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:38,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:38,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1607595381, now seen corresponding path program 49 times [2020-09-14 12:37:38,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:38,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083946769] [2020-09-14 12:37:38,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:38,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:38,285 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:38,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083946769] [2020-09-14 12:37:38,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017174834] [2020-09-14 12:37:38,285 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:38,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:38,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:37:38,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:38,428 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:37:38,439 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:38,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:38,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-14 12:37:38,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679001586] [2020-09-14 12:37:38,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:37:38,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:38,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:37:38,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:37:38,441 INFO L87 Difference]: Start difference. First operand 119 states and 287 transitions. Second operand 13 states. [2020-09-14 12:37:38,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:38,836 INFO L93 Difference]: Finished difference Result 180 states and 420 transitions. [2020-09-14 12:37:38,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-14 12:37:38,837 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-14 12:37:38,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:38,838 INFO L225 Difference]: With dead ends: 180 [2020-09-14 12:37:38,838 INFO L226 Difference]: Without dead ends: 175 [2020-09-14 12:37:38,839 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-09-14 12:37:38,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-09-14 12:37:38,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 114. [2020-09-14 12:37:38,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-09-14 12:37:38,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 268 transitions. [2020-09-14 12:37:38,842 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 268 transitions. Word has length 12 [2020-09-14 12:37:38,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:38,843 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 268 transitions. [2020-09-14 12:37:38,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:37:38,843 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 268 transitions. [2020-09-14 12:37:38,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:37:38,843 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:38,843 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:39,046 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2020-09-14 12:37:39,046 INFO L427 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:39,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:39,047 INFO L82 PathProgramCache]: Analyzing trace with hash -655922238, now seen corresponding path program 5 times [2020-09-14 12:37:39,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:39,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797599641] [2020-09-14 12:37:39,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:39,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:39,156 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:39,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797599641] [2020-09-14 12:37:39,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753171362] [2020-09-14 12:37:39,157 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:39,206 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-14 12:37:39,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:39,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:37:39,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:39,328 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:37:39,357 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:39,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:39,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-09-14 12:37:39,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849959827] [2020-09-14 12:37:39,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-14 12:37:39,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:39,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-14 12:37:39,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-09-14 12:37:39,359 INFO L87 Difference]: Start difference. First operand 114 states and 268 transitions. Second operand 16 states. [2020-09-14 12:37:39,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:39,539 INFO L93 Difference]: Finished difference Result 164 states and 382 transitions. [2020-09-14 12:37:39,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-14 12:37:39,540 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2020-09-14 12:37:39,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:39,541 INFO L225 Difference]: With dead ends: 164 [2020-09-14 12:37:39,541 INFO L226 Difference]: Without dead ends: 159 [2020-09-14 12:37:39,541 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2020-09-14 12:37:39,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-09-14 12:37:39,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-09-14 12:37:39,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-09-14 12:37:39,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 299 transitions. [2020-09-14 12:37:39,544 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 299 transitions. Word has length 12 [2020-09-14 12:37:39,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:39,544 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 299 transitions. [2020-09-14 12:37:39,544 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-14 12:37:39,544 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 299 transitions. [2020-09-14 12:37:39,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:37:39,544 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:39,544 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:39,745 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:37:39,746 INFO L427 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:39,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:39,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1940751883, now seen corresponding path program 15 times [2020-09-14 12:37:39,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:39,747 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691484164] [2020-09-14 12:37:39,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:39,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:39,907 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:39,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691484164] [2020-09-14 12:37:39,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753323326] [2020-09-14 12:37:39,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:39,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-14 12:37:39,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:39,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:37:39,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:40,106 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:40,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:40,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:37:40,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230218489] [2020-09-14 12:37:40,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:37:40,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:40,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:37:40,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:37:40,108 INFO L87 Difference]: Start difference. First operand 122 states and 299 transitions. Second operand 15 states. [2020-09-14 12:37:40,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:40,171 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-09-14 12:37:40,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-14 12:37:40,172 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-09-14 12:37:40,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:40,173 INFO L225 Difference]: With dead ends: 156 [2020-09-14 12:37:40,174 INFO L226 Difference]: Without dead ends: 153 [2020-09-14 12:37:40,174 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:37:40,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-09-14 12:37:40,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 129. [2020-09-14 12:37:40,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-09-14 12:37:40,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-09-14 12:37:40,177 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-09-14 12:37:40,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:40,178 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-09-14 12:37:40,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:37:40,178 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-09-14 12:37:40,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:37:40,179 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:40,179 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:40,381 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-09-14 12:37:40,381 INFO L427 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:40,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:40,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1078904123, now seen corresponding path program 16 times [2020-09-14 12:37:40,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:40,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253012912] [2020-09-14 12:37:40,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:40,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:40,521 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:40,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253012912] [2020-09-14 12:37:40,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501866289] [2020-09-14 12:37:40,522 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:40,570 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:37:40,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:40,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:37:40,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:40,724 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:40,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:40,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:37:40,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141080219] [2020-09-14 12:37:40,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:37:40,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:40,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:37:40,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:37:40,726 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-09-14 12:37:40,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:40,824 INFO L93 Difference]: Finished difference Result 170 states and 394 transitions. [2020-09-14 12:37:40,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-14 12:37:40,825 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-09-14 12:37:40,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:40,826 INFO L225 Difference]: With dead ends: 170 [2020-09-14 12:37:40,826 INFO L226 Difference]: Without dead ends: 167 [2020-09-14 12:37:40,826 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-09-14 12:37:40,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-09-14 12:37:40,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 129. [2020-09-14 12:37:40,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-09-14 12:37:40,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-09-14 12:37:40,830 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-09-14 12:37:40,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:40,832 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-09-14 12:37:40,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:37:40,832 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-09-14 12:37:40,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:37:40,833 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:40,833 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:41,043 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:37:41,043 INFO L427 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:41,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:41,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1743839243, now seen corresponding path program 17 times [2020-09-14 12:37:41,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:41,044 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860915767] [2020-09-14 12:37:41,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:41,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:41,176 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:41,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860915767] [2020-09-14 12:37:41,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342138249] [2020-09-14 12:37:41,177 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:41,228 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-14 12:37:41,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:41,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:37:41,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:41,365 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:41,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:41,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:37:41,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744902554] [2020-09-14 12:37:41,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:37:41,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:41,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:37:41,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:37:41,367 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-09-14 12:37:41,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:41,472 INFO L93 Difference]: Finished difference Result 169 states and 394 transitions. [2020-09-14 12:37:41,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-14 12:37:41,473 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-09-14 12:37:41,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:41,474 INFO L225 Difference]: With dead ends: 169 [2020-09-14 12:37:41,475 INFO L226 Difference]: Without dead ends: 166 [2020-09-14 12:37:41,475 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:37:41,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-09-14 12:37:41,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 130. [2020-09-14 12:37:41,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-09-14 12:37:41,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 320 transitions. [2020-09-14 12:37:41,478 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 320 transitions. Word has length 12 [2020-09-14 12:37:41,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:41,478 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 320 transitions. [2020-09-14 12:37:41,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:37:41,478 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 320 transitions. [2020-09-14 12:37:41,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:37:41,481 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:41,481 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:41,689 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:37:41,689 INFO L427 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:41,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:41,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1765288763, now seen corresponding path program 18 times [2020-09-14 12:37:41,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:41,691 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253787119] [2020-09-14 12:37:41,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:41,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:41,793 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:41,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253787119] [2020-09-14 12:37:41,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542565854] [2020-09-14 12:37:41,793 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:41,842 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-14 12:37:41,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:41,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:37:41,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:41,989 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:41,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:41,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:37:41,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495145598] [2020-09-14 12:37:41,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:37:41,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:41,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:37:41,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:37:41,990 INFO L87 Difference]: Start difference. First operand 130 states and 320 transitions. Second operand 15 states. [2020-09-14 12:37:42,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:42,107 INFO L93 Difference]: Finished difference Result 168 states and 394 transitions. [2020-09-14 12:37:42,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-14 12:37:42,107 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-09-14 12:37:42,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:42,109 INFO L225 Difference]: With dead ends: 168 [2020-09-14 12:37:42,109 INFO L226 Difference]: Without dead ends: 165 [2020-09-14 12:37:42,109 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-09-14 12:37:42,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-09-14 12:37:42,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 132. [2020-09-14 12:37:42,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-09-14 12:37:42,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 327 transitions. [2020-09-14 12:37:42,112 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 327 transitions. Word has length 12 [2020-09-14 12:37:42,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:42,113 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 327 transitions. [2020-09-14 12:37:42,113 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:37:42,113 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 327 transitions. [2020-09-14 12:37:42,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:37:42,113 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:42,113 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:42,324 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2020-09-14 12:37:42,325 INFO L427 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:42,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:42,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1765980683, now seen corresponding path program 19 times [2020-09-14 12:37:42,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:42,326 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886783083] [2020-09-14 12:37:42,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:42,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:42,434 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:42,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886783083] [2020-09-14 12:37:42,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876927011] [2020-09-14 12:37:42,434 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:42,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:42,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:37:42,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:42,620 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:42,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:42,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:37:42,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084553942] [2020-09-14 12:37:42,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:37:42,621 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:42,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:37:42,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:37:42,621 INFO L87 Difference]: Start difference. First operand 132 states and 327 transitions. Second operand 15 states. [2020-09-14 12:37:42,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:42,784 INFO L93 Difference]: Finished difference Result 167 states and 394 transitions. [2020-09-14 12:37:42,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-14 12:37:42,784 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-09-14 12:37:42,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:42,785 INFO L225 Difference]: With dead ends: 167 [2020-09-14 12:37:42,785 INFO L226 Difference]: Without dead ends: 164 [2020-09-14 12:37:42,786 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:37:42,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-09-14 12:37:42,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 134. [2020-09-14 12:37:42,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-09-14 12:37:42,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 334 transitions. [2020-09-14 12:37:42,788 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 334 transitions. Word has length 12 [2020-09-14 12:37:42,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:42,788 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 334 transitions. [2020-09-14 12:37:42,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:37:42,789 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 334 transitions. [2020-09-14 12:37:42,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:37:42,789 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:42,789 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:42,990 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:37:42,990 INFO L427 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:42,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:42,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1766003003, now seen corresponding path program 20 times [2020-09-14 12:37:42,991 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:42,991 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094342450] [2020-09-14 12:37:42,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:42,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:43,078 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:43,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094342450] [2020-09-14 12:37:43,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644512422] [2020-09-14 12:37:43,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:43,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:37:43,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:43,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:37:43,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:43,247 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:37:43,258 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:43,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:43,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:37:43,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708625417] [2020-09-14 12:37:43,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:37:43,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:43,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:37:43,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:37:43,260 INFO L87 Difference]: Start difference. First operand 134 states and 334 transitions. Second operand 15 states. [2020-09-14 12:37:43,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:43,489 INFO L93 Difference]: Finished difference Result 176 states and 418 transitions. [2020-09-14 12:37:43,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-14 12:37:43,489 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-09-14 12:37:43,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:43,491 INFO L225 Difference]: With dead ends: 176 [2020-09-14 12:37:43,491 INFO L226 Difference]: Without dead ends: 170 [2020-09-14 12:37:43,491 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2020-09-14 12:37:43,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-09-14 12:37:43,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 132. [2020-09-14 12:37:43,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-09-14 12:37:43,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 332 transitions. [2020-09-14 12:37:43,495 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 332 transitions. Word has length 12 [2020-09-14 12:37:43,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:43,495 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 332 transitions. [2020-09-14 12:37:43,495 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:37:43,495 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 332 transitions. [2020-09-14 12:37:43,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:37:43,496 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:43,496 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:43,696 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:37:43,697 INFO L427 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:43,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:43,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1530333459, now seen corresponding path program 50 times [2020-09-14 12:37:43,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:43,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76859670] [2020-09-14 12:37:43,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:43,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:43,846 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:43,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76859670] [2020-09-14 12:37:43,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528621325] [2020-09-14 12:37:43,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:43,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:37:43,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:43,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:37:43,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:44,095 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:44,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:44,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:37:44,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664862022] [2020-09-14 12:37:44,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:37:44,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:44,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:37:44,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:37:44,097 INFO L87 Difference]: Start difference. First operand 132 states and 332 transitions. Second operand 15 states. [2020-09-14 12:37:44,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:44,168 INFO L93 Difference]: Finished difference Result 163 states and 394 transitions. [2020-09-14 12:37:44,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-14 12:37:44,169 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:37:44,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:44,170 INFO L225 Difference]: With dead ends: 163 [2020-09-14 12:37:44,171 INFO L226 Difference]: Without dead ends: 161 [2020-09-14 12:37:44,171 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:37:44,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-09-14 12:37:44,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 138. [2020-09-14 12:37:44,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-09-14 12:37:44,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 350 transitions. [2020-09-14 12:37:44,176 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 350 transitions. Word has length 13 [2020-09-14 12:37:44,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:44,177 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 350 transitions. [2020-09-14 12:37:44,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:37:44,177 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 350 transitions. [2020-09-14 12:37:44,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:37:44,178 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:44,178 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:44,391 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2020-09-14 12:37:44,391 INFO L427 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:44,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:44,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1530332498, now seen corresponding path program 51 times [2020-09-14 12:37:44,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:44,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063902412] [2020-09-14 12:37:44,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:44,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:44,495 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:44,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063902412] [2020-09-14 12:37:44,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71405469] [2020-09-14 12:37:44,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:44,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-14 12:37:44,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:44,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:37:44,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:44,695 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:44,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:44,695 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:37:44,695 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084454919] [2020-09-14 12:37:44,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:37:44,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:44,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:37:44,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:37:44,696 INFO L87 Difference]: Start difference. First operand 138 states and 350 transitions. Second operand 15 states. [2020-09-14 12:37:44,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:44,872 INFO L93 Difference]: Finished difference Result 172 states and 412 transitions. [2020-09-14 12:37:44,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-14 12:37:44,872 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:37:44,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:44,874 INFO L225 Difference]: With dead ends: 172 [2020-09-14 12:37:44,874 INFO L226 Difference]: Without dead ends: 170 [2020-09-14 12:37:44,874 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:37:44,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-09-14 12:37:44,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 136. [2020-09-14 12:37:44,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-09-14 12:37:44,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-09-14 12:37:44,878 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-09-14 12:37:44,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:44,878 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-09-14 12:37:44,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:37:44,878 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-09-14 12:37:44,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:37:44,879 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:44,879 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:45,091 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:37:45,091 INFO L427 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:45,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:45,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1530303668, now seen corresponding path program 52 times [2020-09-14 12:37:45,092 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:45,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575784543] [2020-09-14 12:37:45,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:45,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:45,207 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:45,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575784543] [2020-09-14 12:37:45,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441133512] [2020-09-14 12:37:45,208 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:45,256 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:37:45,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:45,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:37:45,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:46,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:46,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:46,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:37:46,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152140470] [2020-09-14 12:37:46,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:37:46,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:46,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:37:46,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:37:46,419 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-09-14 12:37:46,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:46,650 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-09-14 12:37:46,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-14 12:37:46,651 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:37:46,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:46,653 INFO L225 Difference]: With dead ends: 179 [2020-09-14 12:37:46,653 INFO L226 Difference]: Without dead ends: 177 [2020-09-14 12:37:46,653 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2020-09-14 12:37:46,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-09-14 12:37:46,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 134. [2020-09-14 12:37:46,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-09-14 12:37:46,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 338 transitions. [2020-09-14 12:37:46,657 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 338 transitions. Word has length 13 [2020-09-14 12:37:46,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:46,658 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 338 transitions. [2020-09-14 12:37:46,658 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:37:46,658 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 338 transitions. [2020-09-14 12:37:46,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:37:46,658 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:46,658 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:46,864 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-09-14 12:37:46,865 INFO L427 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:46,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:46,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1529409938, now seen corresponding path program 53 times [2020-09-14 12:37:46,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:46,866 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883266336] [2020-09-14 12:37:46,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:46,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:46,978 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:46,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883266336] [2020-09-14 12:37:46,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883259664] [2020-09-14 12:37:46,979 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:47,036 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:37:47,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:47,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:37:47,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:47,192 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:47,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:47,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:37:47,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715680812] [2020-09-14 12:37:47,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:37:47,193 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:47,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:37:47,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:37:47,193 INFO L87 Difference]: Start difference. First operand 134 states and 338 transitions. Second operand 15 states. [2020-09-14 12:37:47,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:47,408 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-09-14 12:37:47,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-14 12:37:47,409 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:37:47,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:47,410 INFO L225 Difference]: With dead ends: 179 [2020-09-14 12:37:47,410 INFO L226 Difference]: Without dead ends: 177 [2020-09-14 12:37:47,411 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2020-09-14 12:37:47,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-09-14 12:37:47,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 136. [2020-09-14 12:37:47,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-09-14 12:37:47,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-09-14 12:37:47,415 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-09-14 12:37:47,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:47,415 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-09-14 12:37:47,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:37:47,415 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-09-14 12:37:47,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:37:47,416 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:47,416 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:47,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-09-14 12:37:47,627 INFO L427 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:47,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:47,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1529408977, now seen corresponding path program 54 times [2020-09-14 12:37:47,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:47,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493680179] [2020-09-14 12:37:47,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:47,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:47,738 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:47,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493680179] [2020-09-14 12:37:47,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346814843] [2020-09-14 12:37:47,739 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:47,787 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-14 12:37:47,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:47,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:37:47,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:47,913 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:47,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:47,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:37:47,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741266769] [2020-09-14 12:37:47,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:37:47,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:47,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:37:47,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:37:47,914 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-09-14 12:37:48,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:48,159 INFO L93 Difference]: Finished difference Result 184 states and 436 transitions. [2020-09-14 12:37:48,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-14 12:37:48,159 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:37:48,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:48,161 INFO L225 Difference]: With dead ends: 184 [2020-09-14 12:37:48,161 INFO L226 Difference]: Without dead ends: 182 [2020-09-14 12:37:48,161 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-09-14 12:37:48,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-09-14 12:37:48,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 136. [2020-09-14 12:37:48,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-09-14 12:37:48,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 342 transitions. [2020-09-14 12:37:48,165 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 342 transitions. Word has length 13 [2020-09-14 12:37:48,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:48,165 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 342 transitions. [2020-09-14 12:37:48,165 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:37:48,165 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 342 transitions. [2020-09-14 12:37:48,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:37:48,166 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:48,166 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:48,366 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2020-09-14 12:37:48,367 INFO L427 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:48,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:48,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1529380147, now seen corresponding path program 55 times [2020-09-14 12:37:48,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:48,368 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619332787] [2020-09-14 12:37:48,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:48,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:48,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:48,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619332787] [2020-09-14 12:37:48,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198020917] [2020-09-14 12:37:48,482 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:48,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:48,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:37:48,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:48,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:48,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:48,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:37:48,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672450175] [2020-09-14 12:37:48,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:37:48,683 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:48,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:37:48,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:37:48,684 INFO L87 Difference]: Start difference. First operand 136 states and 342 transitions. Second operand 15 states. [2020-09-14 12:37:48,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:48,937 INFO L93 Difference]: Finished difference Result 179 states and 427 transitions. [2020-09-14 12:37:48,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-14 12:37:48,937 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:37:48,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:48,939 INFO L225 Difference]: With dead ends: 179 [2020-09-14 12:37:48,939 INFO L226 Difference]: Without dead ends: 177 [2020-09-14 12:37:48,939 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-09-14 12:37:48,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-09-14 12:37:48,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 135. [2020-09-14 12:37:48,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-09-14 12:37:48,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 339 transitions. [2020-09-14 12:37:48,943 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 339 transitions. Word has length 13 [2020-09-14 12:37:48,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:48,943 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 339 transitions. [2020-09-14 12:37:48,943 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:37:48,943 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 339 transitions. [2020-09-14 12:37:48,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:37:48,944 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:48,944 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:49,150 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:37:49,151 INFO L427 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:49,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:49,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1501704308, now seen corresponding path program 56 times [2020-09-14 12:37:49,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:49,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613990817] [2020-09-14 12:37:49,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:49,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:49,276 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:49,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613990817] [2020-09-14 12:37:49,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015396259] [2020-09-14 12:37:49,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:49,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:37:49,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:49,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:37:49,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:49,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:49,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:49,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:37:49,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897610177] [2020-09-14 12:37:49,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:37:49,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:49,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:37:49,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:37:49,465 INFO L87 Difference]: Start difference. First operand 135 states and 339 transitions. Second operand 15 states. [2020-09-14 12:37:49,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:49,673 INFO L93 Difference]: Finished difference Result 176 states and 421 transitions. [2020-09-14 12:37:49,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-14 12:37:49,674 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:37:49,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:49,675 INFO L225 Difference]: With dead ends: 176 [2020-09-14 12:37:49,675 INFO L226 Difference]: Without dead ends: 174 [2020-09-14 12:37:49,676 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-09-14 12:37:49,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-09-14 12:37:49,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 139. [2020-09-14 12:37:49,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-14 12:37:49,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 350 transitions. [2020-09-14 12:37:49,679 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 350 transitions. Word has length 13 [2020-09-14 12:37:49,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:49,680 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 350 transitions. [2020-09-14 12:37:49,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:37:49,680 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 350 transitions. [2020-09-14 12:37:49,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:37:49,680 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:49,680 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:49,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:37:49,881 INFO L427 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:49,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:49,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1501703347, now seen corresponding path program 57 times [2020-09-14 12:37:49,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:49,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299278304] [2020-09-14 12:37:49,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:49,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:50,008 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:50,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299278304] [2020-09-14 12:37:50,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800875638] [2020-09-14 12:37:50,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:50,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-14 12:37:50,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:50,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:37:50,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:50,215 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:50,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:50,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:37:50,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273056374] [2020-09-14 12:37:50,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:37:50,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:50,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:37:50,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:37:50,217 INFO L87 Difference]: Start difference. First operand 139 states and 350 transitions. Second operand 15 states. [2020-09-14 12:37:50,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:50,456 INFO L93 Difference]: Finished difference Result 185 states and 439 transitions. [2020-09-14 12:37:50,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-14 12:37:50,456 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:37:50,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:50,458 INFO L225 Difference]: With dead ends: 185 [2020-09-14 12:37:50,458 INFO L226 Difference]: Without dead ends: 183 [2020-09-14 12:37:50,458 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-09-14 12:37:50,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-09-14 12:37:50,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 140. [2020-09-14 12:37:50,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-14 12:37:50,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 352 transitions. [2020-09-14 12:37:50,462 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 352 transitions. Word has length 13 [2020-09-14 12:37:50,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:50,462 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 352 transitions. [2020-09-14 12:37:50,462 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:37:50,462 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 352 transitions. [2020-09-14 12:37:50,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:37:50,463 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:50,463 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:50,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:37:50,672 INFO L427 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:50,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:50,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1501674517, now seen corresponding path program 58 times [2020-09-14 12:37:50,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:50,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349464698] [2020-09-14 12:37:50,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:50,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:50,812 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:50,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349464698] [2020-09-14 12:37:50,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712034951] [2020-09-14 12:37:50,813 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:50,862 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:37:50,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:50,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:37:50,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:50,969 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:50,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:50,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:37:50,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306852766] [2020-09-14 12:37:50,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:37:50,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:50,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:37:50,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:37:50,971 INFO L87 Difference]: Start difference. First operand 140 states and 352 transitions. Second operand 15 states. [2020-09-14 12:37:51,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:51,205 INFO L93 Difference]: Finished difference Result 185 states and 439 transitions. [2020-09-14 12:37:51,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-14 12:37:51,206 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:37:51,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:51,207 INFO L225 Difference]: With dead ends: 185 [2020-09-14 12:37:51,207 INFO L226 Difference]: Without dead ends: 183 [2020-09-14 12:37:51,207 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-09-14 12:37:51,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-09-14 12:37:51,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 138. [2020-09-14 12:37:51,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-09-14 12:37:51,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 345 transitions. [2020-09-14 12:37:51,211 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 345 transitions. Word has length 13 [2020-09-14 12:37:51,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:51,211 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 345 transitions. [2020-09-14 12:37:51,212 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:37:51,212 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 345 transitions. [2020-09-14 12:37:51,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:37:51,212 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:51,212 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:51,413 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:37:51,413 INFO L427 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:51,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:51,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1043911547, now seen corresponding path program 59 times [2020-09-14 12:37:51,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:51,414 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929106937] [2020-09-14 12:37:51,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:51,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:51,575 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:51,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929106937] [2020-09-14 12:37:51,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992912598] [2020-09-14 12:37:51,576 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:51,628 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-14 12:37:51,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:51,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:37:51,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:51,773 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:51,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:51,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:37:51,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897350777] [2020-09-14 12:37:51,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:37:51,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:51,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:37:51,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:37:51,775 INFO L87 Difference]: Start difference. First operand 138 states and 345 transitions. Second operand 15 states. [2020-09-14 12:37:51,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:51,853 INFO L93 Difference]: Finished difference Result 182 states and 432 transitions. [2020-09-14 12:37:51,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-14 12:37:51,853 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:37:51,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:51,855 INFO L225 Difference]: With dead ends: 182 [2020-09-14 12:37:51,855 INFO L226 Difference]: Without dead ends: 180 [2020-09-14 12:37:51,855 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-09-14 12:37:51,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-09-14 12:37:51,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 144. [2020-09-14 12:37:51,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-14 12:37:51,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 363 transitions. [2020-09-14 12:37:51,859 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 363 transitions. Word has length 13 [2020-09-14 12:37:51,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:51,859 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 363 transitions. [2020-09-14 12:37:51,859 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:37:51,859 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 363 transitions. [2020-09-14 12:37:51,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:37:51,860 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:51,860 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:52,060 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2020-09-14 12:37:52,061 INFO L427 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:52,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:52,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1043912508, now seen corresponding path program 60 times [2020-09-14 12:37:52,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:52,062 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242270976] [2020-09-14 12:37:52,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:52,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:52,201 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:52,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242270976] [2020-09-14 12:37:52,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894475166] [2020-09-14 12:37:52,202 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:52,253 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-14 12:37:52,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:52,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:37:52,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:52,414 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:52,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:52,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:37:52,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787841733] [2020-09-14 12:37:52,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:37:52,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:52,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:37:52,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:37:52,416 INFO L87 Difference]: Start difference. First operand 144 states and 363 transitions. Second operand 15 states. [2020-09-14 12:37:52,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:52,638 INFO L93 Difference]: Finished difference Result 185 states and 437 transitions. [2020-09-14 12:37:52,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-14 12:37:52,639 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:37:52,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:52,641 INFO L225 Difference]: With dead ends: 185 [2020-09-14 12:37:52,641 INFO L226 Difference]: Without dead ends: 183 [2020-09-14 12:37:52,641 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2020-09-14 12:37:52,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-09-14 12:37:52,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 142. [2020-09-14 12:37:52,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-14 12:37:52,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-09-14 12:37:52,644 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-09-14 12:37:52,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:52,645 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-09-14 12:37:52,645 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:37:52,645 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-09-14 12:37:52,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:37:52,646 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:52,646 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:52,846 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:37:52,847 INFO L427 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:52,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:52,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1043941338, now seen corresponding path program 61 times [2020-09-14 12:37:52,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:52,848 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017146805] [2020-09-14 12:37:52,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:52,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:52,961 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:52,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017146805] [2020-09-14 12:37:52,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356771563] [2020-09-14 12:37:52,962 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:53,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:53,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:37:53,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:53,224 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:53,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:53,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:37:53,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566603841] [2020-09-14 12:37:53,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:37:53,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:53,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:37:53,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:37:53,226 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-09-14 12:37:53,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:53,486 INFO L93 Difference]: Finished difference Result 191 states and 449 transitions. [2020-09-14 12:37:53,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-14 12:37:53,486 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:37:53,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:53,488 INFO L225 Difference]: With dead ends: 191 [2020-09-14 12:37:53,488 INFO L226 Difference]: Without dead ends: 189 [2020-09-14 12:37:53,488 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2020-09-14 12:37:53,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-09-14 12:37:53,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 140. [2020-09-14 12:37:53,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-14 12:37:53,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 351 transitions. [2020-09-14 12:37:53,491 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 351 transitions. Word has length 13 [2020-09-14 12:37:53,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:53,491 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 351 transitions. [2020-09-14 12:37:53,491 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:37:53,491 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 351 transitions. [2020-09-14 12:37:53,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:37:53,492 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:53,492 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:53,701 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:37:53,701 INFO L427 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:53,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:53,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1044835068, now seen corresponding path program 62 times [2020-09-14 12:37:53,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:53,703 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745356844] [2020-09-14 12:37:53,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:53,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:53,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:53,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745356844] [2020-09-14 12:37:53,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146244021] [2020-09-14 12:37:53,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:53,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:37:53,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:53,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:37:53,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:53,994 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:53,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:53,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:37:53,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546804273] [2020-09-14 12:37:53,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:37:53,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:53,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:37:53,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:37:53,997 INFO L87 Difference]: Start difference. First operand 140 states and 351 transitions. Second operand 15 states. [2020-09-14 12:37:54,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:54,290 INFO L93 Difference]: Finished difference Result 187 states and 441 transitions. [2020-09-14 12:37:54,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-14 12:37:54,291 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:37:54,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:54,292 INFO L225 Difference]: With dead ends: 187 [2020-09-14 12:37:54,292 INFO L226 Difference]: Without dead ends: 185 [2020-09-14 12:37:54,293 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2020-09-14 12:37:54,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-09-14 12:37:54,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 142. [2020-09-14 12:37:54,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-14 12:37:54,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-09-14 12:37:54,296 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-09-14 12:37:54,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:54,296 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-09-14 12:37:54,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:37:54,296 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-09-14 12:37:54,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:37:54,296 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:54,296 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:54,497 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2020-09-14 12:37:54,497 INFO L427 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:54,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:54,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1044836029, now seen corresponding path program 63 times [2020-09-14 12:37:54,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:54,499 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596955401] [2020-09-14 12:37:54,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:54,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:54,610 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:54,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596955401] [2020-09-14 12:37:54,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81469590] [2020-09-14 12:37:54,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:54,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-14 12:37:54,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:54,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:37:54,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:54,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:54,804 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:54,804 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:37:54,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364745197] [2020-09-14 12:37:54,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:37:54,805 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:54,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:37:54,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:37:54,805 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-09-14 12:37:55,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:55,119 INFO L93 Difference]: Finished difference Result 198 states and 463 transitions. [2020-09-14 12:37:55,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-14 12:37:55,119 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:37:55,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:55,121 INFO L225 Difference]: With dead ends: 198 [2020-09-14 12:37:55,121 INFO L226 Difference]: Without dead ends: 196 [2020-09-14 12:37:55,122 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2020-09-14 12:37:55,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-09-14 12:37:55,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 142. [2020-09-14 12:37:55,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-14 12:37:55,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 356 transitions. [2020-09-14 12:37:55,126 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 356 transitions. Word has length 13 [2020-09-14 12:37:55,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:55,126 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 356 transitions. [2020-09-14 12:37:55,126 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:37:55,126 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 356 transitions. [2020-09-14 12:37:55,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:37:55,127 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:55,127 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:55,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:37:55,331 INFO L427 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:55,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:55,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1044864859, now seen corresponding path program 64 times [2020-09-14 12:37:55,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:55,332 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127585702] [2020-09-14 12:37:55,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:55,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:55,445 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:55,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127585702] [2020-09-14 12:37:55,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95691906] [2020-09-14 12:37:55,446 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:55,495 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:37:55,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:55,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:37:55,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:55,636 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:55,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:55,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:37:55,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414305950] [2020-09-14 12:37:55,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:37:55,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:55,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:37:55,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:37:55,637 INFO L87 Difference]: Start difference. First operand 142 states and 356 transitions. Second operand 15 states. [2020-09-14 12:37:55,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:55,959 INFO L93 Difference]: Finished difference Result 189 states and 446 transitions. [2020-09-14 12:37:55,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-14 12:37:55,960 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:37:55,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:55,962 INFO L225 Difference]: With dead ends: 189 [2020-09-14 12:37:55,962 INFO L226 Difference]: Without dead ends: 187 [2020-09-14 12:37:55,962 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-09-14 12:37:55,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-09-14 12:37:55,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 139. [2020-09-14 12:37:55,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-14 12:37:55,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 347 transitions. [2020-09-14 12:37:55,964 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 347 transitions. Word has length 13 [2020-09-14 12:37:55,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:55,965 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 347 transitions. [2020-09-14 12:37:55,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:37:55,965 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 347 transitions. [2020-09-14 12:37:55,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:37:55,965 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:55,966 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:56,166 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2020-09-14 12:37:56,166 INFO L427 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:56,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:56,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1681141037, now seen corresponding path program 65 times [2020-09-14 12:37:56,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:56,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425620834] [2020-09-14 12:37:56,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:56,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:56,327 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:56,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425620834] [2020-09-14 12:37:56,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911531766] [2020-09-14 12:37:56,328 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:56,368 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-14 12:37:56,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:56,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:37:56,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:56,520 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:56,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:56,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:37:56,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697912516] [2020-09-14 12:37:56,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:37:56,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:56,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:37:56,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:37:56,522 INFO L87 Difference]: Start difference. First operand 139 states and 347 transitions. Second operand 15 states. [2020-09-14 12:37:56,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:56,643 INFO L93 Difference]: Finished difference Result 178 states and 423 transitions. [2020-09-14 12:37:56,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-14 12:37:56,644 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:37:56,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:56,646 INFO L225 Difference]: With dead ends: 178 [2020-09-14 12:37:56,646 INFO L226 Difference]: Without dead ends: 176 [2020-09-14 12:37:56,647 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:37:56,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-09-14 12:37:56,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 143. [2020-09-14 12:37:56,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-14 12:37:56,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 359 transitions. [2020-09-14 12:37:56,652 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 359 transitions. Word has length 13 [2020-09-14 12:37:56,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:56,652 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 359 transitions. [2020-09-14 12:37:56,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:37:56,653 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 359 transitions. [2020-09-14 12:37:56,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:37:56,653 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:56,654 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:56,868 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:37:56,868 INFO L427 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:56,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:56,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1681141998, now seen corresponding path program 66 times [2020-09-14 12:37:56,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:56,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890860655] [2020-09-14 12:37:56,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:56,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:56,996 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:56,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890860655] [2020-09-14 12:37:56,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046839135] [2020-09-14 12:37:56,997 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:57,050 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-14 12:37:57,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:57,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:37:57,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:57,205 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:57,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:57,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:37:57,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242228533] [2020-09-14 12:37:57,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:37:57,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:57,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:37:57,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:37:57,207 INFO L87 Difference]: Start difference. First operand 143 states and 359 transitions. Second operand 15 states. [2020-09-14 12:37:57,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:57,442 INFO L93 Difference]: Finished difference Result 193 states and 452 transitions. [2020-09-14 12:37:57,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-14 12:37:57,442 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:37:57,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:57,444 INFO L225 Difference]: With dead ends: 193 [2020-09-14 12:37:57,445 INFO L226 Difference]: Without dead ends: 191 [2020-09-14 12:37:57,445 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-09-14 12:37:57,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-09-14 12:37:57,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 141. [2020-09-14 12:37:57,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-14 12:37:57,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 353 transitions. [2020-09-14 12:37:57,448 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 353 transitions. Word has length 13 [2020-09-14 12:37:57,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:57,448 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 353 transitions. [2020-09-14 12:37:57,448 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:37:57,448 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 353 transitions. [2020-09-14 12:37:57,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:37:57,449 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:57,449 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:57,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2020-09-14 12:37:57,650 INFO L427 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:57,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:57,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1681170828, now seen corresponding path program 67 times [2020-09-14 12:37:57,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:57,651 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128904033] [2020-09-14 12:37:57,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:57,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:57,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:57,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128904033] [2020-09-14 12:37:57,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516896012] [2020-09-14 12:37:57,770 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:57,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:57,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:37:57,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:58,013 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:58,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:58,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:37:58,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671669794] [2020-09-14 12:37:58,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:37:58,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:58,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:37:58,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:37:58,015 INFO L87 Difference]: Start difference. First operand 141 states and 353 transitions. Second operand 15 states. [2020-09-14 12:37:58,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:58,315 INFO L93 Difference]: Finished difference Result 195 states and 456 transitions. [2020-09-14 12:37:58,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-14 12:37:58,316 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:37:58,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:58,317 INFO L225 Difference]: With dead ends: 195 [2020-09-14 12:37:58,318 INFO L226 Difference]: Without dead ends: 193 [2020-09-14 12:37:58,318 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2020-09-14 12:37:58,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-09-14 12:37:58,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 140. [2020-09-14 12:37:58,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-14 12:37:58,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 349 transitions. [2020-09-14 12:37:58,321 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 349 transitions. Word has length 13 [2020-09-14 12:37:58,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:58,322 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 349 transitions. [2020-09-14 12:37:58,322 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:37:58,322 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 349 transitions. [2020-09-14 12:37:58,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:37:58,322 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:58,322 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:58,523 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:37:58,524 INFO L427 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:58,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:58,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1701696827, now seen corresponding path program 68 times [2020-09-14 12:37:58,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:58,525 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965116695] [2020-09-14 12:37:58,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:58,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:58,655 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:58,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965116695] [2020-09-14 12:37:58,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427438866] [2020-09-14 12:37:58,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:58,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:37:58,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:58,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:37:58,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:58,834 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:58,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:58,835 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:37:58,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882792994] [2020-09-14 12:37:58,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:37:58,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:58,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:37:58,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:37:58,836 INFO L87 Difference]: Start difference. First operand 140 states and 349 transitions. Second operand 15 states. [2020-09-14 12:37:58,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:58,973 INFO L93 Difference]: Finished difference Result 174 states and 414 transitions. [2020-09-14 12:37:58,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-14 12:37:58,973 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:37:58,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:58,975 INFO L225 Difference]: With dead ends: 174 [2020-09-14 12:37:58,975 INFO L226 Difference]: Without dead ends: 172 [2020-09-14 12:37:58,975 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-09-14 12:37:58,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-09-14 12:37:58,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 142. [2020-09-14 12:37:58,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-14 12:37:58,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 355 transitions. [2020-09-14 12:37:58,978 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 355 transitions. Word has length 13 [2020-09-14 12:37:58,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:58,978 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 355 transitions. [2020-09-14 12:37:58,979 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:37:58,979 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 355 transitions. [2020-09-14 12:37:58,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:37:58,979 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:58,979 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:59,180 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2020-09-14 12:37:59,180 INFO L427 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:59,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:59,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1701697788, now seen corresponding path program 69 times [2020-09-14 12:37:59,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:59,182 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965880847] [2020-09-14 12:37:59,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:59,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:59,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:59,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965880847] [2020-09-14 12:37:59,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233401480] [2020-09-14 12:37:59,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:37:59,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-14 12:37:59,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:59,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:37:59,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:59,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:59,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:59,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:37:59,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111104855] [2020-09-14 12:37:59,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:37:59,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:59,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:37:59,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:37:59,492 INFO L87 Difference]: Start difference. First operand 142 states and 355 transitions. Second operand 15 states. [2020-09-14 12:37:59,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:59,774 INFO L93 Difference]: Finished difference Result 189 states and 443 transitions. [2020-09-14 12:37:59,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-14 12:37:59,775 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:37:59,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:59,776 INFO L225 Difference]: With dead ends: 189 [2020-09-14 12:37:59,776 INFO L226 Difference]: Without dead ends: 187 [2020-09-14 12:37:59,777 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-09-14 12:37:59,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-09-14 12:37:59,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 141. [2020-09-14 12:37:59,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-14 12:37:59,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 351 transitions. [2020-09-14 12:37:59,779 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 351 transitions. Word has length 13 [2020-09-14 12:37:59,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:59,780 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 351 transitions. [2020-09-14 12:37:59,780 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:37:59,780 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 351 transitions. [2020-09-14 12:37:59,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:37:59,780 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:59,780 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:59,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:37:59,983 INFO L427 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:59,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:59,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1702359917, now seen corresponding path program 70 times [2020-09-14 12:37:59,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:59,984 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107619270] [2020-09-14 12:37:59,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:59,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:38:00,096 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:00,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107619270] [2020-09-14 12:38:00,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483834812] [2020-09-14 12:38:00,097 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:38:00,146 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:38:00,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:38:00,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:38:00,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:38:00,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:00,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:38:00,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:38:00,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067182402] [2020-09-14 12:38:00,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:38:00,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:38:00,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:38:00,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:38:00,294 INFO L87 Difference]: Start difference. First operand 141 states and 351 transitions. Second operand 15 states. [2020-09-14 12:38:00,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:38:00,461 INFO L93 Difference]: Finished difference Result 175 states and 413 transitions. [2020-09-14 12:38:00,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-14 12:38:00,462 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:38:00,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:38:00,463 INFO L225 Difference]: With dead ends: 175 [2020-09-14 12:38:00,464 INFO L226 Difference]: Without dead ends: 173 [2020-09-14 12:38:00,464 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:38:00,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-09-14 12:38:00,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 145. [2020-09-14 12:38:00,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-14 12:38:00,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-09-14 12:38:00,467 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-09-14 12:38:00,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:38:00,467 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-09-14 12:38:00,467 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:38:00,468 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-09-14 12:38:00,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:38:00,468 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:38:00,468 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:38:00,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:38:00,669 INFO L427 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:38:00,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:38:00,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1702382237, now seen corresponding path program 71 times [2020-09-14 12:38:00,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:38:00,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658371683] [2020-09-14 12:38:00,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:38:00,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:38:00,771 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:00,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658371683] [2020-09-14 12:38:00,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032872652] [2020-09-14 12:38:00,772 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:38:00,820 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-14 12:38:00,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:38:00,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:38:00,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:38:00,948 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:38:00,987 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:00,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:38:00,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:38:00,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92149766] [2020-09-14 12:38:00,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:38:00,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:38:00,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:38:00,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:38:00,989 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-09-14 12:38:01,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:38:01,387 INFO L93 Difference]: Finished difference Result 195 states and 464 transitions. [2020-09-14 12:38:01,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-14 12:38:01,388 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:38:01,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:38:01,390 INFO L225 Difference]: With dead ends: 195 [2020-09-14 12:38:01,390 INFO L226 Difference]: Without dead ends: 190 [2020-09-14 12:38:01,390 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-09-14 12:38:01,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-09-14 12:38:01,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 143. [2020-09-14 12:38:01,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-14 12:38:01,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-09-14 12:38:01,393 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-09-14 12:38:01,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:38:01,394 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-09-14 12:38:01,394 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:38:01,394 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-09-14 12:38:01,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:38:01,394 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:38:01,394 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:38:01,595 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:38:01,595 INFO L427 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:38:01,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:38:01,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1702389708, now seen corresponding path program 72 times [2020-09-14 12:38:01,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:38:01,596 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097638598] [2020-09-14 12:38:01,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:38:01,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:38:01,687 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:01,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097638598] [2020-09-14 12:38:01,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467973137] [2020-09-14 12:38:01,688 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:38:01,740 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-14 12:38:01,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:38:01,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:38:01,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:38:01,898 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:01,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:38:01,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:38:01,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550840168] [2020-09-14 12:38:01,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:38:01,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:38:01,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:38:01,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:38:01,900 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-09-14 12:38:02,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:38:02,206 INFO L93 Difference]: Finished difference Result 187 states and 442 transitions. [2020-09-14 12:38:02,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-14 12:38:02,207 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:38:02,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:38:02,208 INFO L225 Difference]: With dead ends: 187 [2020-09-14 12:38:02,208 INFO L226 Difference]: Without dead ends: 185 [2020-09-14 12:38:02,209 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-09-14 12:38:02,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-09-14 12:38:02,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 145. [2020-09-14 12:38:02,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-14 12:38:02,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-09-14 12:38:02,212 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-09-14 12:38:02,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:38:02,212 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-09-14 12:38:02,212 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:38:02,212 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-09-14 12:38:02,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:38:02,213 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:38:02,213 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:38:02,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:38:02,424 INFO L427 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:38:02,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:38:02,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1702411067, now seen corresponding path program 73 times [2020-09-14 12:38:02,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:38:02,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30557262] [2020-09-14 12:38:02,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:38:02,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:38:02,529 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:02,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30557262] [2020-09-14 12:38:02,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200528127] [2020-09-14 12:38:02,530 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:38:02,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:38:02,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:38:02,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:38:02,715 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:38:02,760 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:02,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:38:02,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:38:02,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482737827] [2020-09-14 12:38:02,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:38:02,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:38:02,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:38:02,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:38:02,763 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-09-14 12:38:03,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:38:03,319 INFO L93 Difference]: Finished difference Result 212 states and 503 transitions. [2020-09-14 12:38:03,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-14 12:38:03,320 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:38:03,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:38:03,322 INFO L225 Difference]: With dead ends: 212 [2020-09-14 12:38:03,322 INFO L226 Difference]: Without dead ends: 207 [2020-09-14 12:38:03,323 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2020-09-14 12:38:03,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-09-14 12:38:03,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-09-14 12:38:03,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-14 12:38:03,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-09-14 12:38:03,327 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-09-14 12:38:03,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:38:03,328 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-09-14 12:38:03,328 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:38:03,328 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-09-14 12:38:03,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:38:03,328 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:38:03,328 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:38:03,534 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2020-09-14 12:38:03,535 INFO L427 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:38:03,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:38:03,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1702412028, now seen corresponding path program 74 times [2020-09-14 12:38:03,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:38:03,536 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569876921] [2020-09-14 12:38:03,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:38:03,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:38:03,639 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:03,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569876921] [2020-09-14 12:38:03,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577227800] [2020-09-14 12:38:03,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:38:03,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:38:03,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:38:03,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:38:03,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:38:03,812 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:38:03,843 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:03,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:38:03,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:38:03,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470923429] [2020-09-14 12:38:03,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:38:03,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:38:03,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:38:03,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:38:03,845 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-09-14 12:38:04,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:38:04,221 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-09-14 12:38:04,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-14 12:38:04,222 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:38:04,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:38:04,223 INFO L225 Difference]: With dead ends: 202 [2020-09-14 12:38:04,223 INFO L226 Difference]: Without dead ends: 197 [2020-09-14 12:38:04,224 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-09-14 12:38:04,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-09-14 12:38:04,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 141. [2020-09-14 12:38:04,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-14 12:38:04,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 343 transitions. [2020-09-14 12:38:04,227 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 343 transitions. Word has length 13 [2020-09-14 12:38:04,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:38:04,227 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 343 transitions. [2020-09-14 12:38:04,228 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:38:04,228 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 343 transitions. [2020-09-14 12:38:04,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:38:04,228 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:38:04,228 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:38:04,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:38:04,429 INFO L427 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:38:04,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:38:04,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1702620348, now seen corresponding path program 75 times [2020-09-14 12:38:04,430 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:38:04,430 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439165777] [2020-09-14 12:38:04,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:38:04,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:38:04,529 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:04,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439165777] [2020-09-14 12:38:04,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126450320] [2020-09-14 12:38:04,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:38:04,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-14 12:38:04,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:38:04,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:38:04,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:38:05,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:05,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:38:05,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:38:05,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685895377] [2020-09-14 12:38:05,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:38:05,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:38:05,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:38:05,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:38:05,250 INFO L87 Difference]: Start difference. First operand 141 states and 343 transitions. Second operand 15 states. [2020-09-14 12:38:05,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:38:05,581 INFO L93 Difference]: Finished difference Result 198 states and 460 transitions. [2020-09-14 12:38:05,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-14 12:38:05,581 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:38:05,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:38:05,583 INFO L225 Difference]: With dead ends: 198 [2020-09-14 12:38:05,583 INFO L226 Difference]: Without dead ends: 196 [2020-09-14 12:38:05,583 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2020-09-14 12:38:05,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-09-14 12:38:05,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 143. [2020-09-14 12:38:05,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-14 12:38:05,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-09-14 12:38:05,587 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-09-14 12:38:05,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:38:05,588 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-09-14 12:38:05,588 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:38:05,588 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-09-14 12:38:05,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:38:05,589 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:38:05,589 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:38:05,795 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2020-09-14 12:38:05,796 INFO L427 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:38:05,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:38:05,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1703283438, now seen corresponding path program 76 times [2020-09-14 12:38:05,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:38:05,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309074564] [2020-09-14 12:38:05,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:38:05,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:38:05,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:05,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309074564] [2020-09-14 12:38:05,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427831479] [2020-09-14 12:38:05,895 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:38:05,943 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:38:05,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:38:05,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:38:05,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:38:06,134 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:06,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:38:06,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:38:06,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375707944] [2020-09-14 12:38:06,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:38:06,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:38:06,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:38:06,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:38:06,136 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-09-14 12:38:06,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:38:06,629 INFO L93 Difference]: Finished difference Result 209 states and 491 transitions. [2020-09-14 12:38:06,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-14 12:38:06,630 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:38:06,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:38:06,632 INFO L225 Difference]: With dead ends: 209 [2020-09-14 12:38:06,632 INFO L226 Difference]: Without dead ends: 207 [2020-09-14 12:38:06,632 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=206, Invalid=444, Unknown=0, NotChecked=0, Total=650 [2020-09-14 12:38:06,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-09-14 12:38:06,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-09-14 12:38:06,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-14 12:38:06,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-09-14 12:38:06,636 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-09-14 12:38:06,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:38:06,636 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-09-14 12:38:06,636 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:38:06,636 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-09-14 12:38:06,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:38:06,637 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:38:06,637 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:38:06,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-09-14 12:38:06,838 INFO L427 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:38:06,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:38:06,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1703304797, now seen corresponding path program 77 times [2020-09-14 12:38:06,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:38:06,839 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012074443] [2020-09-14 12:38:06,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:38:06,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:38:06,942 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:06,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012074443] [2020-09-14 12:38:06,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839190424] [2020-09-14 12:38:06,943 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:38:06,993 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-14 12:38:06,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:38:06,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:38:06,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:38:07,128 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:38:07,171 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:07,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:38:07,172 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:38:07,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490515421] [2020-09-14 12:38:07,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:38:07,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:38:07,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:38:07,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:38:07,173 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-09-14 12:38:07,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:38:07,838 INFO L93 Difference]: Finished difference Result 217 states and 518 transitions. [2020-09-14 12:38:07,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-14 12:38:07,839 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:38:07,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:38:07,840 INFO L225 Difference]: With dead ends: 217 [2020-09-14 12:38:07,840 INFO L226 Difference]: Without dead ends: 212 [2020-09-14 12:38:07,841 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=289, Invalid=581, Unknown=0, NotChecked=0, Total=870 [2020-09-14 12:38:07,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-09-14 12:38:07,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 146. [2020-09-14 12:38:07,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-09-14 12:38:07,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 362 transitions. [2020-09-14 12:38:07,845 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 362 transitions. Word has length 13 [2020-09-14 12:38:07,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:38:07,845 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 362 transitions. [2020-09-14 12:38:07,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:38:07,846 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 362 transitions. [2020-09-14 12:38:07,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:38:07,846 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:38:07,846 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:38:08,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2020-09-14 12:38:08,053 INFO L427 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:38:08,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:38:08,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1703305758, now seen corresponding path program 78 times [2020-09-14 12:38:08,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:38:08,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390911403] [2020-09-14 12:38:08,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:38:08,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:38:08,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:08,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390911403] [2020-09-14 12:38:08,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559535528] [2020-09-14 12:38:08,163 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:38:08,211 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-14 12:38:08,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:38:08,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:38:08,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:38:10,396 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:38:10,438 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:10,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:38:10,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:38:10,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952938990] [2020-09-14 12:38:10,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:38:10,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:38:10,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:38:10,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=142, Unknown=1, NotChecked=0, Total=210 [2020-09-14 12:38:10,439 INFO L87 Difference]: Start difference. First operand 146 states and 362 transitions. Second operand 15 states. [2020-09-14 12:38:14,781 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-09-14 12:38:19,040 WARN L193 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-09-14 12:38:19,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:38:19,546 INFO L93 Difference]: Finished difference Result 236 states and 562 transitions. [2020-09-14 12:38:19,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-14 12:38:19,547 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:38:19,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:38:19,548 INFO L225 Difference]: With dead ends: 236 [2020-09-14 12:38:19,548 INFO L226 Difference]: Without dead ends: 228 [2020-09-14 12:38:19,549 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=293, Invalid=636, Unknown=1, NotChecked=0, Total=930 [2020-09-14 12:38:19,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-09-14 12:38:19,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 141. [2020-09-14 12:38:19,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-14 12:38:19,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 346 transitions. [2020-09-14 12:38:19,553 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 346 transitions. Word has length 13 [2020-09-14 12:38:19,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:38:19,553 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 346 transitions. [2020-09-14 12:38:19,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:38:19,553 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 346 transitions. [2020-09-14 12:38:19,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:38:19,554 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:38:19,554 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:38:19,763 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-09-14 12:38:19,763 INFO L427 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:38:19,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:38:19,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1703334588, now seen corresponding path program 79 times [2020-09-14 12:38:19,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:38:19,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310844365] [2020-09-14 12:38:19,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:38:19,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:38:19,872 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:19,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310844365] [2020-09-14 12:38:19,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589646296] [2020-09-14 12:38:19,873 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:38:19,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:38:19,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:38:19,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:38:20,062 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:38:20,066 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:38:20,099 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:20,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:38:20,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:38:20,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028155158] [2020-09-14 12:38:20,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:38:20,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:38:20,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:38:20,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:38:20,101 INFO L87 Difference]: Start difference. First operand 141 states and 346 transitions. Second operand 15 states. [2020-09-14 12:38:20,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:38:20,746 INFO L93 Difference]: Finished difference Result 219 states and 522 transitions. [2020-09-14 12:38:20,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-14 12:38:20,747 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:38:20,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:38:20,749 INFO L225 Difference]: With dead ends: 219 [2020-09-14 12:38:20,749 INFO L226 Difference]: Without dead ends: 214 [2020-09-14 12:38:20,749 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=262, Invalid=550, Unknown=0, NotChecked=0, Total=812 [2020-09-14 12:38:20,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-09-14 12:38:20,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 140. [2020-09-14 12:38:20,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-14 12:38:20,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 341 transitions. [2020-09-14 12:38:20,753 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 341 transitions. Word has length 13 [2020-09-14 12:38:20,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:38:20,753 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 341 transitions. [2020-09-14 12:38:20,753 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:38:20,753 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 341 transitions. [2020-09-14 12:38:20,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:38:20,754 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:38:20,754 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:38:20,956 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:38:20,957 INFO L427 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:38:20,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:38:20,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1709770188, now seen corresponding path program 80 times [2020-09-14 12:38:20,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:38:20,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117583765] [2020-09-14 12:38:20,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:38:20,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:38:21,055 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:21,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117583765] [2020-09-14 12:38:21,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514651219] [2020-09-14 12:38:21,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:38:21,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:38:21,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:38:21,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:38:21,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:38:21,297 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:21,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:38:21,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:38:21,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403557642] [2020-09-14 12:38:21,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:38:21,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:38:21,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:38:21,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:38:21,299 INFO L87 Difference]: Start difference. First operand 140 states and 341 transitions. Second operand 15 states. [2020-09-14 12:38:21,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:38:21,584 INFO L93 Difference]: Finished difference Result 197 states and 457 transitions. [2020-09-14 12:38:21,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-14 12:38:21,585 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:38:21,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:38:21,586 INFO L225 Difference]: With dead ends: 197 [2020-09-14 12:38:21,586 INFO L226 Difference]: Without dead ends: 195 [2020-09-14 12:38:21,586 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-09-14 12:38:21,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-09-14 12:38:21,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 143. [2020-09-14 12:38:21,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-14 12:38:21,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 352 transitions. [2020-09-14 12:38:21,590 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 352 transitions. Word has length 13 [2020-09-14 12:38:21,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:38:21,591 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 352 transitions. [2020-09-14 12:38:21,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:38:21,591 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 352 transitions. [2020-09-14 12:38:21,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:38:21,593 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:38:21,594 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:38:21,797 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:38:21,798 INFO L427 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:38:21,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:38:21,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1709771149, now seen corresponding path program 81 times [2020-09-14 12:38:21,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:38:21,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265009790] [2020-09-14 12:38:21,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:38:21,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:38:21,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:21,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265009790] [2020-09-14 12:38:21,905 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611014219] [2020-09-14 12:38:21,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:38:21,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-14 12:38:21,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:38:21,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:38:21,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:38:22,103 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:22,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:38:22,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:38:22,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871761690] [2020-09-14 12:38:22,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:38:22,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:38:22,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:38:22,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:38:22,105 INFO L87 Difference]: Start difference. First operand 143 states and 352 transitions. Second operand 15 states. [2020-09-14 12:38:22,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:38:22,432 INFO L93 Difference]: Finished difference Result 202 states and 467 transitions. [2020-09-14 12:38:22,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-14 12:38:22,433 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:38:22,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:38:22,434 INFO L225 Difference]: With dead ends: 202 [2020-09-14 12:38:22,434 INFO L226 Difference]: Without dead ends: 200 [2020-09-14 12:38:22,434 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2020-09-14 12:38:22,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-09-14 12:38:22,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 143. [2020-09-14 12:38:22,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-14 12:38:22,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 351 transitions. [2020-09-14 12:38:22,438 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 351 transitions. Word has length 13 [2020-09-14 12:38:22,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:38:22,439 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 351 transitions. [2020-09-14 12:38:22,439 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:38:22,439 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 351 transitions. [2020-09-14 12:38:22,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:38:22,439 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:38:22,439 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:38:22,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2020-09-14 12:38:22,640 INFO L427 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:38:22,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:38:22,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1709799979, now seen corresponding path program 82 times [2020-09-14 12:38:22,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:38:22,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194533274] [2020-09-14 12:38:22,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:38:22,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:38:22,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:22,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194533274] [2020-09-14 12:38:22,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305597790] [2020-09-14 12:38:22,760 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:38:22,810 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:38:22,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:38:22,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:38:22,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:38:22,991 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:22,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:38:22,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:38:22,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036824805] [2020-09-14 12:38:22,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:38:22,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:38:22,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:38:22,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:38:22,992 INFO L87 Difference]: Start difference. First operand 143 states and 351 transitions. Second operand 15 states. [2020-09-14 12:38:23,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:38:23,351 INFO L93 Difference]: Finished difference Result 197 states and 458 transitions. [2020-09-14 12:38:23,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-14 12:38:23,352 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:38:23,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:38:23,353 INFO L225 Difference]: With dead ends: 197 [2020-09-14 12:38:23,353 INFO L226 Difference]: Without dead ends: 195 [2020-09-14 12:38:23,353 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2020-09-14 12:38:23,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-09-14 12:38:23,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 142. [2020-09-14 12:38:23,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-14 12:38:23,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 348 transitions. [2020-09-14 12:38:23,357 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 348 transitions. Word has length 13 [2020-09-14 12:38:23,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:38:23,357 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 348 transitions. [2020-09-14 12:38:23,357 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:38:23,357 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 348 transitions. [2020-09-14 12:38:23,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:38:23,357 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:38:23,358 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:38:23,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-09-14 12:38:23,559 INFO L427 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:38:23,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:38:23,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1730325978, now seen corresponding path program 83 times [2020-09-14 12:38:23,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:38:23,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590378046] [2020-09-14 12:38:23,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:38:23,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:38:23,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:23,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590378046] [2020-09-14 12:38:23,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9863559] [2020-09-14 12:38:23,668 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:38:23,714 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:38:23,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:38:23,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:38:23,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:38:23,909 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:23,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:38:23,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:38:23,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721608187] [2020-09-14 12:38:23,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:38:23,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:38:23,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:38:23,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:38:23,912 INFO L87 Difference]: Start difference. First operand 142 states and 348 transitions. Second operand 15 states. [2020-09-14 12:38:24,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:38:24,521 INFO L93 Difference]: Finished difference Result 214 states and 496 transitions. [2020-09-14 12:38:24,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-14 12:38:24,521 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:38:24,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:38:24,522 INFO L225 Difference]: With dead ends: 214 [2020-09-14 12:38:24,522 INFO L226 Difference]: Without dead ends: 212 [2020-09-14 12:38:24,523 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2020-09-14 12:38:24,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-09-14 12:38:24,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 144. [2020-09-14 12:38:24,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-14 12:38:24,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 356 transitions. [2020-09-14 12:38:24,526 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 356 transitions. Word has length 13 [2020-09-14 12:38:24,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:38:24,527 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 356 transitions. [2020-09-14 12:38:24,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:38:24,527 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 356 transitions. [2020-09-14 12:38:24,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:38:24,528 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:38:24,528 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:38:24,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2020-09-14 12:38:24,736 INFO L427 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:38:24,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:38:24,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1730326939, now seen corresponding path program 84 times [2020-09-14 12:38:24,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:38:24,737 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385628032] [2020-09-14 12:38:24,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:38:24,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:38:24,865 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:24,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385628032] [2020-09-14 12:38:24,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472894901] [2020-09-14 12:38:24,866 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:38:24,938 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-14 12:38:24,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:38:24,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:38:24,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:38:25,106 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:25,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:38:25,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:38:25,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491058264] [2020-09-14 12:38:25,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:38:25,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:38:25,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:38:25,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:38:25,109 INFO L87 Difference]: Start difference. First operand 144 states and 356 transitions. Second operand 15 states. [2020-09-14 12:38:25,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:38:25,574 INFO L93 Difference]: Finished difference Result 217 states and 502 transitions. [2020-09-14 12:38:25,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-14 12:38:25,574 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:38:25,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:38:25,575 INFO L225 Difference]: With dead ends: 217 [2020-09-14 12:38:25,575 INFO L226 Difference]: Without dead ends: 215 [2020-09-14 12:38:25,576 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=207, Invalid=495, Unknown=0, NotChecked=0, Total=702 [2020-09-14 12:38:25,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-09-14 12:38:25,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 145. [2020-09-14 12:38:25,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-14 12:38:25,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-09-14 12:38:25,579 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-09-14 12:38:25,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:38:25,580 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-09-14 12:38:25,580 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:38:25,580 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-09-14 12:38:25,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:38:25,580 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:38:25,581 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:38:25,790 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:38:25,790 INFO L427 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:38:25,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:38:25,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1730989068, now seen corresponding path program 85 times [2020-09-14 12:38:25,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:38:25,792 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614616504] [2020-09-14 12:38:25,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:38:25,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:38:25,903 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:25,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614616504] [2020-09-14 12:38:25,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105133211] [2020-09-14 12:38:25,904 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:38:25,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:38:25,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:38:25,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:38:26,101 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:26,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:38:26,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:38:26,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795081211] [2020-09-14 12:38:26,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:38:26,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:38:26,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:38:26,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:38:26,103 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-09-14 12:38:26,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:38:26,595 INFO L93 Difference]: Finished difference Result 211 states and 500 transitions. [2020-09-14 12:38:26,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-14 12:38:26,596 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:38:26,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:38:26,597 INFO L225 Difference]: With dead ends: 211 [2020-09-14 12:38:26,597 INFO L226 Difference]: Without dead ends: 209 [2020-09-14 12:38:26,598 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2020-09-14 12:38:26,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-09-14 12:38:26,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 147. [2020-09-14 12:38:26,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-09-14 12:38:26,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-09-14 12:38:26,602 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-09-14 12:38:26,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:38:26,602 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-09-14 12:38:26,602 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:38:26,602 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-09-14 12:38:26,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:38:26,602 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:38:26,603 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:38:26,803 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:38:26,804 INFO L427 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:38:26,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:38:26,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1731010427, now seen corresponding path program 86 times [2020-09-14 12:38:26,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:38:26,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234438730] [2020-09-14 12:38:26,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:38:26,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:38:26,903 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:26,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234438730] [2020-09-14 12:38:26,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008168396] [2020-09-14 12:38:26,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:38:26,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:38:26,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:38:26,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:38:26,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:38:27,082 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:38:27,093 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:27,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:38:27,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:38:27,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416781900] [2020-09-14 12:38:27,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:38:27,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:38:27,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:38:27,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:38:27,095 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-09-14 12:38:27,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:38:27,670 INFO L93 Difference]: Finished difference Result 211 states and 507 transitions. [2020-09-14 12:38:27,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-14 12:38:27,671 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:38:27,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:38:27,672 INFO L225 Difference]: With dead ends: 211 [2020-09-14 12:38:27,672 INFO L226 Difference]: Without dead ends: 206 [2020-09-14 12:38:27,672 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-09-14 12:38:27,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-09-14 12:38:27,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 147. [2020-09-14 12:38:27,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-09-14 12:38:27,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-09-14 12:38:27,675 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-09-14 12:38:27,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:38:27,676 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-09-14 12:38:27,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:38:27,676 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-09-14 12:38:27,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:38:27,676 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:38:27,676 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:38:27,877 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-09-14 12:38:27,877 INFO L427 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:38:27,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:38:27,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1731011388, now seen corresponding path program 87 times [2020-09-14 12:38:27,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:38:27,878 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224409703] [2020-09-14 12:38:27,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:38:27,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:38:27,986 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:27,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224409703] [2020-09-14 12:38:27,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631838208] [2020-09-14 12:38:27,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:38:28,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-14 12:38:28,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:38:28,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:38:28,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:38:28,165 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:38:28,217 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:28,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:38:28,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:38:28,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829077181] [2020-09-14 12:38:28,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:38:28,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:38:28,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:38:28,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:38:28,218 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-09-14 12:38:28,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:38:28,939 INFO L93 Difference]: Finished difference Result 227 states and 546 transitions. [2020-09-14 12:38:28,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-14 12:38:28,940 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:38:28,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:38:28,941 INFO L225 Difference]: With dead ends: 227 [2020-09-14 12:38:28,941 INFO L226 Difference]: Without dead ends: 222 [2020-09-14 12:38:28,941 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-09-14 12:38:28,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-09-14 12:38:28,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 145. [2020-09-14 12:38:28,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-14 12:38:28,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-09-14 12:38:28,946 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-09-14 12:38:28,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:38:28,946 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-09-14 12:38:28,946 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:38:28,947 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-09-14 12:38:28,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:38:28,947 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:38:28,947 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:38:29,148 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2020-09-14 12:38:29,148 INFO L427 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:38:29,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:38:29,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1731018859, now seen corresponding path program 88 times [2020-09-14 12:38:29,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:38:29,149 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585682804] [2020-09-14 12:38:29,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:38:29,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:38:29,255 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:29,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585682804] [2020-09-14 12:38:29,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529029524] [2020-09-14 12:38:29,256 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:38:29,306 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:38:29,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:38:29,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:38:29,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:38:29,439 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:29,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:38:29,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:38:29,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074372259] [2020-09-14 12:38:29,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:38:29,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:38:29,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:38:29,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:38:29,441 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-09-14 12:38:30,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:38:30,012 INFO L93 Difference]: Finished difference Result 221 states and 523 transitions. [2020-09-14 12:38:30,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-14 12:38:30,013 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:38:30,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:38:30,013 INFO L225 Difference]: With dead ends: 221 [2020-09-14 12:38:30,014 INFO L226 Difference]: Without dead ends: 219 [2020-09-14 12:38:30,014 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=278, Invalid=652, Unknown=0, NotChecked=0, Total=930 [2020-09-14 12:38:30,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-09-14 12:38:30,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 147. [2020-09-14 12:38:30,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-09-14 12:38:30,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-09-14 12:38:30,018 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-09-14 12:38:30,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:38:30,018 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-09-14 12:38:30,018 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:38:30,018 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-09-14 12:38:30,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:38:30,018 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:38:30,021 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:38:30,221 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:38:30,222 INFO L427 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:38:30,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:38:30,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1731040218, now seen corresponding path program 89 times [2020-09-14 12:38:30,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:38:30,223 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431249479] [2020-09-14 12:38:30,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:38:30,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:38:30,331 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:30,331 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431249479] [2020-09-14 12:38:30,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230906716] [2020-09-14 12:38:30,332 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:38:30,381 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-14 12:38:30,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:38:30,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:38:30,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:38:30,502 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:38:30,512 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:30,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:38:30,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:38:30,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418565053] [2020-09-14 12:38:30,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:38:30,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:38:30,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:38:30,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:38:30,514 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-09-14 12:38:31,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:38:31,235 INFO L93 Difference]: Finished difference Result 240 states and 577 transitions. [2020-09-14 12:38:31,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-14 12:38:31,236 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:38:31,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:38:31,237 INFO L225 Difference]: With dead ends: 240 [2020-09-14 12:38:31,237 INFO L226 Difference]: Without dead ends: 232 [2020-09-14 12:38:31,237 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-09-14 12:38:31,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-09-14 12:38:31,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 148. [2020-09-14 12:38:31,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-09-14 12:38:31,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 372 transitions. [2020-09-14 12:38:31,240 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 372 transitions. Word has length 13 [2020-09-14 12:38:31,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:38:31,240 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 372 transitions. [2020-09-14 12:38:31,241 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:38:31,241 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 372 transitions. [2020-09-14 12:38:31,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:38:31,241 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:38:31,241 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:38:31,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-09-14 12:38:31,442 INFO L427 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:38:31,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:38:31,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1731041179, now seen corresponding path program 90 times [2020-09-14 12:38:31,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:38:31,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845641714] [2020-09-14 12:38:31,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:38:31,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:38:31,549 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:31,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845641714] [2020-09-14 12:38:31,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731774606] [2020-09-14 12:38:31,550 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:38:31,606 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-14 12:38:31,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:38:31,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:38:31,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:38:31,743 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:38:31,760 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:31,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:38:31,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:38:31,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290652593] [2020-09-14 12:38:31,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:38:31,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:38:31,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:38:31,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:38:31,762 INFO L87 Difference]: Start difference. First operand 148 states and 372 transitions. Second operand 15 states. [2020-09-14 12:38:32,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:38:32,435 INFO L93 Difference]: Finished difference Result 238 states and 576 transitions. [2020-09-14 12:38:32,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-14 12:38:32,436 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:38:32,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:38:32,437 INFO L225 Difference]: With dead ends: 238 [2020-09-14 12:38:32,437 INFO L226 Difference]: Without dead ends: 230 [2020-09-14 12:38:32,437 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-09-14 12:38:32,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-09-14 12:38:32,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 142. [2020-09-14 12:38:32,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-14 12:38:32,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-09-14 12:38:32,440 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-09-14 12:38:32,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:38:32,441 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-09-14 12:38:32,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:38:32,441 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-09-14 12:38:32,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:38:32,441 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:38:32,442 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:38:32,650 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:38:32,650 INFO L427 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:38:32,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:38:32,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1731249499, now seen corresponding path program 91 times [2020-09-14 12:38:32,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:38:32,651 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011249045] [2020-09-14 12:38:32,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:38:32,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:38:32,761 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:32,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011249045] [2020-09-14 12:38:32,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780900410] [2020-09-14 12:38:32,762 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:38:32,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:38:32,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:38:32,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:38:32,971 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:32,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:38:32,972 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:38:32,972 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965898337] [2020-09-14 12:38:32,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:38:32,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:38:32,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:38:32,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:38:32,973 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-09-14 12:38:33,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:38:33,301 INFO L93 Difference]: Finished difference Result 195 states and 459 transitions. [2020-09-14 12:38:33,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-14 12:38:33,302 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:38:33,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:38:33,303 INFO L225 Difference]: With dead ends: 195 [2020-09-14 12:38:33,303 INFO L226 Difference]: Without dead ends: 193 [2020-09-14 12:38:33,303 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2020-09-14 12:38:33,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-09-14 12:38:33,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 142. [2020-09-14 12:38:33,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-14 12:38:33,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-09-14 12:38:33,307 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-09-14 12:38:33,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:38:33,307 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-09-14 12:38:33,307 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:38:33,307 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-09-14 12:38:33,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:38:33,307 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:38:33,307 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:38:33,508 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2020-09-14 12:38:33,508 INFO L427 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:38:33,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:38:33,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1731912589, now seen corresponding path program 92 times [2020-09-14 12:38:33,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:38:33,509 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468611504] [2020-09-14 12:38:33,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:38:33,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:38:33,623 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:33,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468611504] [2020-09-14 12:38:33,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189812344] [2020-09-14 12:38:33,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:38:33,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:38:33,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:38:33,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:38:33,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:38:33,836 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:33,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:38:33,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:38:33,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893282508] [2020-09-14 12:38:33,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:38:33,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:38:33,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:38:33,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:38:33,838 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-09-14 12:38:34,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:38:34,457 INFO L93 Difference]: Finished difference Result 206 states and 489 transitions. [2020-09-14 12:38:34,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-14 12:38:34,458 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:38:34,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:38:34,459 INFO L225 Difference]: With dead ends: 206 [2020-09-14 12:38:34,459 INFO L226 Difference]: Without dead ends: 204 [2020-09-14 12:38:34,460 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=230, Invalid=526, Unknown=0, NotChecked=0, Total=756 [2020-09-14 12:38:34,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-09-14 12:38:34,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 143. [2020-09-14 12:38:34,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-14 12:38:34,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 356 transitions. [2020-09-14 12:38:34,463 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 356 transitions. Word has length 13 [2020-09-14 12:38:34,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:38:34,463 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 356 transitions. [2020-09-14 12:38:34,463 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:38:34,463 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 356 transitions. [2020-09-14 12:38:34,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:38:34,464 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:38:34,464 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:38:34,664 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:38:34,665 INFO L427 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:38:34,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:38:34,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1731934909, now seen corresponding path program 93 times [2020-09-14 12:38:34,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:38:34,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113476070] [2020-09-14 12:38:34,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:38:34,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:38:34,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:34,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113476070] [2020-09-14 12:38:34,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925445357] [2020-09-14 12:38:34,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:38:34,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-14 12:38:34,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:38:34,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:38:34,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:38:34,972 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:38:37,070 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:37,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:38:37,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-09-14 12:38:37,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168244004] [2020-09-14 12:38:37,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-14 12:38:37,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:38:37,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-14 12:38:37,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=171, Unknown=1, NotChecked=0, Total=240 [2020-09-14 12:38:37,072 INFO L87 Difference]: Start difference. First operand 143 states and 356 transitions. Second operand 16 states. [2020-09-14 12:38:39,594 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 25 [2020-09-14 12:39:02,002 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 29 [2020-09-14 12:39:29,937 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2020-09-14 12:39:51,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:39:51,249 INFO L93 Difference]: Finished difference Result 252 states and 593 transitions. [2020-09-14 12:39:51,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-14 12:39:51,250 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-09-14 12:39:51,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:39:51,251 INFO L225 Difference]: With dead ends: 252 [2020-09-14 12:39:51,251 INFO L226 Difference]: Without dead ends: 247 [2020-09-14 12:39:51,252 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 31.7s TimeCoverageRelationStatistics Valid=389, Invalid=934, Unknown=9, NotChecked=0, Total=1332 [2020-09-14 12:39:51,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-09-14 12:39:51,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 139. [2020-09-14 12:39:51,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-14 12:39:51,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 339 transitions. [2020-09-14 12:39:51,256 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 339 transitions. Word has length 13 [2020-09-14 12:39:51,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:39:51,256 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 339 transitions. [2020-09-14 12:39:51,256 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-14 12:39:51,256 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 339 transitions. [2020-09-14 12:39:51,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:39:51,257 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:39:51,257 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:39:51,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2020-09-14 12:39:51,468 INFO L427 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:39:51,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:39:51,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1931415228, now seen corresponding path program 94 times [2020-09-14 12:39:51,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:39:51,470 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289849523] [2020-09-14 12:39:51,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:39:51,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:39:51,594 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:39:51,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289849523] [2020-09-14 12:39:51,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413955078] [2020-09-14 12:39:51,595 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:39:51,646 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:39:51,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:39:51,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:39:51,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:39:51,808 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:39:51,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:39:51,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:39:51,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725577488] [2020-09-14 12:39:51,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:39:51,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:39:51,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:39:51,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:39:51,810 INFO L87 Difference]: Start difference. First operand 139 states and 339 transitions. Second operand 15 states. [2020-09-14 12:39:52,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:39:52,094 INFO L93 Difference]: Finished difference Result 194 states and 449 transitions. [2020-09-14 12:39:52,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-14 12:39:52,095 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:39:52,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:39:52,096 INFO L225 Difference]: With dead ends: 194 [2020-09-14 12:39:52,096 INFO L226 Difference]: Without dead ends: 192 [2020-09-14 12:39:52,097 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-09-14 12:39:52,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-09-14 12:39:52,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 141. [2020-09-14 12:39:52,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-14 12:39:52,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 345 transitions. [2020-09-14 12:39:52,100 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 345 transitions. Word has length 13 [2020-09-14 12:39:52,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:39:52,100 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 345 transitions. [2020-09-14 12:39:52,100 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:39:52,100 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 345 transitions. [2020-09-14 12:39:52,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:39:52,100 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:39:52,101 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:39:52,301 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:39:52,302 INFO L427 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:39:52,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:39:52,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1931416189, now seen corresponding path program 95 times [2020-09-14 12:39:52,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:39:52,303 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46990312] [2020-09-14 12:39:52,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:39:52,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:39:52,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:39:52,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46990312] [2020-09-14 12:39:52,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95039479] [2020-09-14 12:39:52,430 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:39:52,481 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-14 12:39:52,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:39:52,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:39:52,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:39:52,653 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:39:52,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:39:52,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:39:52,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613424878] [2020-09-14 12:39:52,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:39:52,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:39:52,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:39:52,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:39:52,655 INFO L87 Difference]: Start difference. First operand 141 states and 345 transitions. Second operand 15 states. [2020-09-14 12:39:53,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:39:53,052 INFO L93 Difference]: Finished difference Result 205 states and 471 transitions. [2020-09-14 12:39:53,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-14 12:39:53,053 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:39:53,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:39:53,054 INFO L225 Difference]: With dead ends: 205 [2020-09-14 12:39:53,054 INFO L226 Difference]: Without dead ends: 203 [2020-09-14 12:39:53,055 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-09-14 12:39:53,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-09-14 12:39:53,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 142. [2020-09-14 12:39:53,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-14 12:39:53,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 347 transitions. [2020-09-14 12:39:53,059 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 347 transitions. Word has length 13 [2020-09-14 12:39:53,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:39:53,059 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 347 transitions. [2020-09-14 12:39:53,059 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:39:53,059 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 347 transitions. [2020-09-14 12:39:53,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:39:53,060 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:39:53,060 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:39:53,269 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:39:53,269 INFO L427 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:39:53,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:39:53,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1931445019, now seen corresponding path program 96 times [2020-09-14 12:39:53,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:39:53,271 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992200352] [2020-09-14 12:39:53,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:39:53,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:39:53,399 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:39:53,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992200352] [2020-09-14 12:39:53,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972839334] [2020-09-14 12:39:53,400 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:39:53,449 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-14 12:39:53,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:39:53,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:39:53,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:39:53,605 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:39:53,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:39:53,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:39:53,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224720339] [2020-09-14 12:39:53,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:39:53,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:39:53,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:39:53,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:39:53,606 INFO L87 Difference]: Start difference. First operand 142 states and 347 transitions. Second operand 15 states. [2020-09-14 12:39:53,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:39:53,974 INFO L93 Difference]: Finished difference Result 201 states and 465 transitions. [2020-09-14 12:39:53,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-14 12:39:53,975 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:39:53,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:39:53,976 INFO L225 Difference]: With dead ends: 201 [2020-09-14 12:39:53,977 INFO L226 Difference]: Without dead ends: 199 [2020-09-14 12:39:53,977 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2020-09-14 12:39:53,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-09-14 12:39:53,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 137. [2020-09-14 12:39:53,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-09-14 12:39:53,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 334 transitions. [2020-09-14 12:39:53,981 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 334 transitions. Word has length 13 [2020-09-14 12:39:53,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:39:53,981 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 334 transitions. [2020-09-14 12:39:53,981 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:39:53,981 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 334 transitions. [2020-09-14 12:39:53,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:39:53,981 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:39:53,981 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:39:54,182 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:39:54,182 INFO L427 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:39:54,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:39:54,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1726322578, now seen corresponding path program 97 times [2020-09-14 12:39:54,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:39:54,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076341897] [2020-09-14 12:39:54,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:39:54,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:39:54,301 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:39:54,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076341897] [2020-09-14 12:39:54,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438243420] [2020-09-14 12:39:54,302 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:39:54,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:39:54,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:39:54,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:39:54,536 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:39:54,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:39:54,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:39:54,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847624894] [2020-09-14 12:39:54,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:39:54,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:39:54,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:39:54,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:39:54,538 INFO L87 Difference]: Start difference. First operand 137 states and 334 transitions. Second operand 15 states. [2020-09-14 12:39:54,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:39:54,871 INFO L93 Difference]: Finished difference Result 194 states and 449 transitions. [2020-09-14 12:39:54,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-14 12:39:54,872 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:39:54,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:39:54,873 INFO L225 Difference]: With dead ends: 194 [2020-09-14 12:39:54,873 INFO L226 Difference]: Without dead ends: 192 [2020-09-14 12:39:54,873 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-09-14 12:39:54,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-09-14 12:39:54,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 140. [2020-09-14 12:39:54,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-14 12:39:54,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 345 transitions. [2020-09-14 12:39:54,877 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 345 transitions. Word has length 13 [2020-09-14 12:39:54,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:39:54,877 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 345 transitions. [2020-09-14 12:39:54,877 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:39:54,877 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 345 transitions. [2020-09-14 12:39:54,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:39:54,878 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:39:54,878 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:39:55,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2020-09-14 12:39:55,085 INFO L427 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:39:55,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:39:55,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1726321617, now seen corresponding path program 98 times [2020-09-14 12:39:55,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:39:55,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943241216] [2020-09-14 12:39:55,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:39:55,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:39:55,204 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:39:55,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943241216] [2020-09-14 12:39:55,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829546420] [2020-09-14 12:39:55,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:39:55,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:39:55,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:39:55,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:39:55,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:39:55,439 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:39:55,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:39:55,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:39:55,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843431499] [2020-09-14 12:39:55,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:39:55,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:39:55,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:39:55,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:39:55,441 INFO L87 Difference]: Start difference. First operand 140 states and 345 transitions. Second operand 15 states. [2020-09-14 12:39:55,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:39:55,883 INFO L93 Difference]: Finished difference Result 209 states and 478 transitions. [2020-09-14 12:39:55,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-14 12:39:55,884 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:39:55,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:39:55,885 INFO L225 Difference]: With dead ends: 209 [2020-09-14 12:39:55,885 INFO L226 Difference]: Without dead ends: 207 [2020-09-14 12:39:55,885 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2020-09-14 12:39:55,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-09-14 12:39:55,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 140. [2020-09-14 12:39:55,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-14 12:39:55,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 344 transitions. [2020-09-14 12:39:55,889 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 344 transitions. Word has length 13 [2020-09-14 12:39:55,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:39:55,889 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 344 transitions. [2020-09-14 12:39:55,889 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:39:55,889 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 344 transitions. [2020-09-14 12:39:55,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:39:55,889 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:39:55,890 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:39:56,090 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:39:56,091 INFO L427 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:39:56,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:39:56,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1726292787, now seen corresponding path program 99 times [2020-09-14 12:39:56,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:39:56,092 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512950267] [2020-09-14 12:39:56,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:39:56,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:39:56,202 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:39:56,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512950267] [2020-09-14 12:39:56,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301380227] [2020-09-14 12:39:56,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:39:56,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-14 12:39:56,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:39:56,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:39:56,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:39:56,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:39:56,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:39:56,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:39:56,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759957971] [2020-09-14 12:39:56,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:39:56,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:39:56,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:39:56,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:39:56,431 INFO L87 Difference]: Start difference. First operand 140 states and 344 transitions. Second operand 15 states. [2020-09-14 12:39:56,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:39:56,849 INFO L93 Difference]: Finished difference Result 202 states and 464 transitions. [2020-09-14 12:39:56,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-14 12:39:56,855 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:39:56,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:39:56,856 INFO L225 Difference]: With dead ends: 202 [2020-09-14 12:39:56,856 INFO L226 Difference]: Without dead ends: 200 [2020-09-14 12:39:56,856 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2020-09-14 12:39:56,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-09-14 12:39:56,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 139. [2020-09-14 12:39:56,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-14 12:39:56,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-09-14 12:39:56,859 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-09-14 12:39:56,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:39:56,859 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-09-14 12:39:56,860 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:39:56,860 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-09-14 12:39:56,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:39:56,860 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:39:56,860 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:39:57,061 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-09-14 12:39:57,061 INFO L427 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:39:57,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:39:57,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1705766788, now seen corresponding path program 100 times [2020-09-14 12:39:57,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:39:57,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254032078] [2020-09-14 12:39:57,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:39:57,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:39:57,176 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:39:57,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254032078] [2020-09-14 12:39:57,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812401267] [2020-09-14 12:39:57,176 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:39:57,229 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:39:57,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:39:57,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:39:57,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:39:57,401 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:39:57,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:39:57,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:39:57,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188575962] [2020-09-14 12:39:57,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:39:57,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:39:57,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:39:57,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:39:57,403 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 15 states. [2020-09-14 12:39:57,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:39:57,816 INFO L93 Difference]: Finished difference Result 201 states and 465 transitions. [2020-09-14 12:39:57,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-14 12:39:57,817 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:39:57,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:39:57,818 INFO L225 Difference]: With dead ends: 201 [2020-09-14 12:39:57,818 INFO L226 Difference]: Without dead ends: 199 [2020-09-14 12:39:57,818 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=177, Invalid=423, Unknown=0, NotChecked=0, Total=600 [2020-09-14 12:39:57,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-09-14 12:39:57,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 141. [2020-09-14 12:39:57,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-14 12:39:57,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 349 transitions. [2020-09-14 12:39:57,821 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 349 transitions. Word has length 13 [2020-09-14 12:39:57,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:39:57,821 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 349 transitions. [2020-09-14 12:39:57,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:39:57,822 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 349 transitions. [2020-09-14 12:39:57,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:39:57,822 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:39:57,822 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:39:58,023 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-09-14 12:39:58,023 INFO L427 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:39:58,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:39:58,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1705765827, now seen corresponding path program 101 times [2020-09-14 12:39:58,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:39:58,025 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300946889] [2020-09-14 12:39:58,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:39:58,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:39:58,141 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:39:58,142 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300946889] [2020-09-14 12:39:58,142 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454173425] [2020-09-14 12:39:58,142 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:39:58,191 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-14 12:39:58,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:39:58,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:39:58,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:39:58,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:39:58,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:39:58,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:39:58,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195103361] [2020-09-14 12:39:58,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:39:58,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:39:58,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:39:58,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:39:58,363 INFO L87 Difference]: Start difference. First operand 141 states and 349 transitions. Second operand 15 states. [2020-09-14 12:39:58,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:39:58,931 INFO L93 Difference]: Finished difference Result 215 states and 495 transitions. [2020-09-14 12:39:58,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-14 12:39:58,932 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:39:58,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:39:58,933 INFO L225 Difference]: With dead ends: 215 [2020-09-14 12:39:58,934 INFO L226 Difference]: Without dead ends: 213 [2020-09-14 12:39:58,934 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-09-14 12:39:58,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-09-14 12:39:58,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 142. [2020-09-14 12:39:58,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-14 12:39:58,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-09-14 12:39:58,938 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-09-14 12:39:58,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:39:58,939 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-09-14 12:39:58,939 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:39:58,939 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-09-14 12:39:58,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:39:58,939 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:39:58,940 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:39:59,142 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:39:59,142 INFO L427 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:39:59,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:39:59,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1705103698, now seen corresponding path program 102 times [2020-09-14 12:39:59,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:39:59,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234880317] [2020-09-14 12:39:59,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:39:59,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:39:59,247 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:39:59,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234880317] [2020-09-14 12:39:59,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608300199] [2020-09-14 12:39:59,248 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:39:59,301 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-14 12:39:59,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:39:59,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:39:59,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:39:59,460 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:39:59,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:39:59,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:39:59,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756279501] [2020-09-14 12:39:59,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:39:59,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:39:59,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:39:59,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:39:59,462 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-09-14 12:39:59,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:39:59,941 INFO L93 Difference]: Finished difference Result 196 states and 461 transitions. [2020-09-14 12:39:59,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-14 12:39:59,942 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:39:59,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:39:59,944 INFO L225 Difference]: With dead ends: 196 [2020-09-14 12:39:59,944 INFO L226 Difference]: Without dead ends: 194 [2020-09-14 12:39:59,944 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2020-09-14 12:39:59,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-09-14 12:39:59,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 144. [2020-09-14 12:39:59,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-14 12:39:59,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-09-14 12:39:59,948 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-09-14 12:39:59,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:39:59,948 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-09-14 12:39:59,948 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:39:59,948 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-09-14 12:39:59,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:39:59,949 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:39:59,949 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:00,150 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:40:00,150 INFO L427 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:00,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:00,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1705082339, now seen corresponding path program 103 times [2020-09-14 12:40:00,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:00,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130381123] [2020-09-14 12:40:00,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:00,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:00,260 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:00,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130381123] [2020-09-14 12:40:00,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642634412] [2020-09-14 12:40:00,260 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:40:00,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:00,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:40:00,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:00,432 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:40:00,444 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:00,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:00,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:40:00,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416779720] [2020-09-14 12:40:00,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:40:00,445 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:00,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:40:00,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:40:00,446 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-09-14 12:40:00,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:00,828 INFO L93 Difference]: Finished difference Result 191 states and 460 transitions. [2020-09-14 12:40:00,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-14 12:40:00,829 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:40:00,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:00,830 INFO L225 Difference]: With dead ends: 191 [2020-09-14 12:40:00,830 INFO L226 Difference]: Without dead ends: 186 [2020-09-14 12:40:00,830 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2020-09-14 12:40:00,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-09-14 12:40:00,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 144. [2020-09-14 12:40:00,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-14 12:40:00,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-09-14 12:40:00,834 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-09-14 12:40:00,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:00,834 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-09-14 12:40:00,834 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:40:00,834 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-09-14 12:40:00,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:40:00,835 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:00,835 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:01,041 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2020-09-14 12:40:01,041 INFO L427 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:01,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:01,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1705081378, now seen corresponding path program 104 times [2020-09-14 12:40:01,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:01,043 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639307816] [2020-09-14 12:40:01,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:01,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:01,154 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:01,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639307816] [2020-09-14 12:40:01,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736055898] [2020-09-14 12:40:01,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:40:01,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:40:01,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:40:01,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:40:01,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:01,341 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:40:01,384 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:01,384 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:01,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:40:01,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674699091] [2020-09-14 12:40:01,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:40:01,385 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:01,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:40:01,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:40:01,385 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-09-14 12:40:02,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:02,069 INFO L93 Difference]: Finished difference Result 232 states and 551 transitions. [2020-09-14 12:40:02,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-14 12:40:02,070 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:40:02,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:02,072 INFO L225 Difference]: With dead ends: 232 [2020-09-14 12:40:02,072 INFO L226 Difference]: Without dead ends: 227 [2020-09-14 12:40:02,072 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=280, Invalid=650, Unknown=0, NotChecked=0, Total=930 [2020-09-14 12:40:02,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-09-14 12:40:02,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 142. [2020-09-14 12:40:02,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-14 12:40:02,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-09-14 12:40:02,075 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-09-14 12:40:02,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:02,076 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-09-14 12:40:02,076 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:40:02,076 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-09-14 12:40:02,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:40:02,076 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:02,077 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:02,286 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:40:02,286 INFO L427 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:02,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:02,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1705073907, now seen corresponding path program 105 times [2020-09-14 12:40:02,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:02,287 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433456355] [2020-09-14 12:40:02,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:02,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:02,410 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:02,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433456355] [2020-09-14 12:40:02,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794864539] [2020-09-14 12:40:02,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:40:02,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-14 12:40:02,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:40:02,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:40:02,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:02,632 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:02,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:02,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:40:02,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381379771] [2020-09-14 12:40:02,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:40:02,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:02,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:40:02,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:40:02,634 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-09-14 12:40:03,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:03,319 INFO L93 Difference]: Finished difference Result 222 states and 521 transitions. [2020-09-14 12:40:03,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-14 12:40:03,320 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:40:03,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:03,321 INFO L225 Difference]: With dead ends: 222 [2020-09-14 12:40:03,321 INFO L226 Difference]: Without dead ends: 220 [2020-09-14 12:40:03,321 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=277, Invalid=653, Unknown=0, NotChecked=0, Total=930 [2020-09-14 12:40:03,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-09-14 12:40:03,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 144. [2020-09-14 12:40:03,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-14 12:40:03,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-09-14 12:40:03,325 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-09-14 12:40:03,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:03,325 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-09-14 12:40:03,325 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:40:03,325 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-09-14 12:40:03,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:40:03,325 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:03,326 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:03,526 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:40:03,527 INFO L427 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:03,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:03,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1705052548, now seen corresponding path program 106 times [2020-09-14 12:40:03,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:03,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349395661] [2020-09-14 12:40:03,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:03,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:03,645 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:03,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349395661] [2020-09-14 12:40:03,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683257661] [2020-09-14 12:40:03,646 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:40:03,699 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:40:03,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:40:03,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:40:03,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:03,855 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:40:03,901 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:03,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:03,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:40:03,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633612132] [2020-09-14 12:40:03,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:40:03,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:03,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:40:03,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:40:03,904 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-09-14 12:40:04,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:04,845 INFO L93 Difference]: Finished difference Result 254 states and 608 transitions. [2020-09-14 12:40:04,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-14 12:40:04,846 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:40:04,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:04,847 INFO L225 Difference]: With dead ends: 254 [2020-09-14 12:40:04,847 INFO L226 Difference]: Without dead ends: 246 [2020-09-14 12:40:04,848 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=345, Invalid=777, Unknown=0, NotChecked=0, Total=1122 [2020-09-14 12:40:04,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-09-14 12:40:04,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 146. [2020-09-14 12:40:04,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-09-14 12:40:04,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 370 transitions. [2020-09-14 12:40:04,852 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 370 transitions. Word has length 13 [2020-09-14 12:40:04,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:04,852 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 370 transitions. [2020-09-14 12:40:04,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:40:04,852 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 370 transitions. [2020-09-14 12:40:04,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:40:04,853 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:04,853 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:05,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:40:05,064 INFO L427 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:05,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:05,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1705051587, now seen corresponding path program 107 times [2020-09-14 12:40:05,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:05,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490778733] [2020-09-14 12:40:05,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:05,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:05,182 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:05,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490778733] [2020-09-14 12:40:05,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626750079] [2020-09-14 12:40:05,183 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:40:05,235 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-14 12:40:05,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:40:05,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:40:05,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:05,393 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:40:05,416 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:05,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:05,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:40:05,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481465978] [2020-09-14 12:40:05,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:40:05,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:05,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:40:05,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:40:05,418 INFO L87 Difference]: Start difference. First operand 146 states and 370 transitions. Second operand 15 states. [2020-09-14 12:40:06,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:06,391 INFO L93 Difference]: Finished difference Result 246 states and 581 transitions. [2020-09-14 12:40:06,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-14 12:40:06,392 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:40:06,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:06,393 INFO L225 Difference]: With dead ends: 246 [2020-09-14 12:40:06,393 INFO L226 Difference]: Without dead ends: 238 [2020-09-14 12:40:06,393 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=384, Invalid=876, Unknown=0, NotChecked=0, Total=1260 [2020-09-14 12:40:06,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-09-14 12:40:06,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 139. [2020-09-14 12:40:06,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-14 12:40:06,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 344 transitions. [2020-09-14 12:40:06,397 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 344 transitions. Word has length 13 [2020-09-14 12:40:06,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:06,397 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 344 transitions. [2020-09-14 12:40:06,397 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:40:06,397 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 344 transitions. [2020-09-14 12:40:06,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:40:06,398 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:06,398 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:06,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2020-09-14 12:40:06,609 INFO L427 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:06,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:06,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1704843267, now seen corresponding path program 108 times [2020-09-14 12:40:06,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:06,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133853762] [2020-09-14 12:40:06,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:06,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:06,711 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:06,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133853762] [2020-09-14 12:40:06,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850964733] [2020-09-14 12:40:06,711 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:40:06,762 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-14 12:40:06,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:40:06,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:40:06,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:06,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:06,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:06,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:40:06,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400256] [2020-09-14 12:40:06,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:40:06,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:06,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:40:06,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:40:06,948 INFO L87 Difference]: Start difference. First operand 139 states and 344 transitions. Second operand 15 states. [2020-09-14 12:40:07,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:07,446 INFO L93 Difference]: Finished difference Result 208 states and 483 transitions. [2020-09-14 12:40:07,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-14 12:40:07,448 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:40:07,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:07,448 INFO L225 Difference]: With dead ends: 208 [2020-09-14 12:40:07,449 INFO L226 Difference]: Without dead ends: 206 [2020-09-14 12:40:07,449 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=205, Invalid=497, Unknown=0, NotChecked=0, Total=702 [2020-09-14 12:40:07,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-09-14 12:40:07,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 136. [2020-09-14 12:40:07,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-09-14 12:40:07,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 337 transitions. [2020-09-14 12:40:07,452 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 337 transitions. Word has length 13 [2020-09-14 12:40:07,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:07,453 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 337 transitions. [2020-09-14 12:40:07,453 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:40:07,453 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 337 transitions. [2020-09-14 12:40:07,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:40:07,453 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:07,453 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:07,654 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-09-14 12:40:07,654 INFO L427 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:07,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:07,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1704180177, now seen corresponding path program 109 times [2020-09-14 12:40:07,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:07,656 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900120009] [2020-09-14 12:40:07,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:07,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:07,771 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:07,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900120009] [2020-09-14 12:40:07,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042744002] [2020-09-14 12:40:07,772 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:40:07,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:07,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:40:07,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:07,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:07,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:07,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:40:07,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457819790] [2020-09-14 12:40:07,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:40:07,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:07,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:40:07,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:40:07,968 INFO L87 Difference]: Start difference. First operand 136 states and 337 transitions. Second operand 15 states. [2020-09-14 12:40:08,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:08,599 INFO L93 Difference]: Finished difference Result 215 states and 507 transitions. [2020-09-14 12:40:08,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-14 12:40:08,600 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:40:08,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:08,601 INFO L225 Difference]: With dead ends: 215 [2020-09-14 12:40:08,601 INFO L226 Difference]: Without dead ends: 213 [2020-09-14 12:40:08,602 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=265, Invalid=605, Unknown=0, NotChecked=0, Total=870 [2020-09-14 12:40:08,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-09-14 12:40:08,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 137. [2020-09-14 12:40:08,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-09-14 12:40:08,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-09-14 12:40:08,605 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-09-14 12:40:08,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:08,605 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-09-14 12:40:08,605 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:40:08,605 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-09-14 12:40:08,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:40:08,605 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:08,606 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:08,806 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2020-09-14 12:40:08,806 INFO L427 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:08,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:08,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1704158818, now seen corresponding path program 110 times [2020-09-14 12:40:08,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:08,808 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224635639] [2020-09-14 12:40:08,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:08,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:08,923 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:08,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224635639] [2020-09-14 12:40:08,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763084426] [2020-09-14 12:40:08,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:40:08,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:40:08,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:40:08,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:40:08,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:09,107 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:40:09,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:09,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:09,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:40:09,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391994849] [2020-09-14 12:40:09,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:40:09,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:09,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:40:09,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:40:09,119 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-09-14 12:40:09,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:09,832 INFO L93 Difference]: Finished difference Result 236 states and 563 transitions. [2020-09-14 12:40:09,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-14 12:40:09,833 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:40:09,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:09,834 INFO L225 Difference]: With dead ends: 236 [2020-09-14 12:40:09,834 INFO L226 Difference]: Without dead ends: 228 [2020-09-14 12:40:09,834 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-09-14 12:40:09,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-09-14 12:40:09,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 137. [2020-09-14 12:40:09,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-09-14 12:40:09,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-09-14 12:40:09,837 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-09-14 12:40:09,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:09,838 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-09-14 12:40:09,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:40:09,838 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-09-14 12:40:09,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:40:09,838 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:09,838 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:10,039 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-09-14 12:40:10,039 INFO L427 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:10,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:10,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1704157857, now seen corresponding path program 111 times [2020-09-14 12:40:10,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:10,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498508425] [2020-09-14 12:40:10,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:10,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:10,156 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:10,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498508425] [2020-09-14 12:40:10,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574186694] [2020-09-14 12:40:10,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:40:10,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-14 12:40:10,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:40:10,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:40:10,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:10,344 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:40:10,355 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:10,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:10,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:40:10,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297246335] [2020-09-14 12:40:10,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:40:10,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:10,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:40:10,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:40:10,357 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-09-14 12:40:11,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:11,152 INFO L93 Difference]: Finished difference Result 241 states and 576 transitions. [2020-09-14 12:40:11,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-14 12:40:11,153 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:40:11,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:11,154 INFO L225 Difference]: With dead ends: 241 [2020-09-14 12:40:11,155 INFO L226 Difference]: Without dead ends: 233 [2020-09-14 12:40:11,155 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-09-14 12:40:11,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-09-14 12:40:11,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 133. [2020-09-14 12:40:11,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-09-14 12:40:11,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 324 transitions. [2020-09-14 12:40:11,159 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 324 transitions. Word has length 13 [2020-09-14 12:40:11,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:11,159 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 324 transitions. [2020-09-14 12:40:11,159 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:40:11,159 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 324 transitions. [2020-09-14 12:40:11,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:40:11,160 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:11,160 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:11,370 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2020-09-14 12:40:11,370 INFO L427 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:11,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:11,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1704129027, now seen corresponding path program 112 times [2020-09-14 12:40:11,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:11,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177905810] [2020-09-14 12:40:11,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:11,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:11,496 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:11,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177905810] [2020-09-14 12:40:11,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921023498] [2020-09-14 12:40:11,497 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:40:11,550 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:40:11,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:40:11,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:40:11,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:11,702 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:40:11,716 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:11,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:11,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:40:11,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168484766] [2020-09-14 12:40:11,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:40:11,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:11,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:40:11,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:40:11,718 INFO L87 Difference]: Start difference. First operand 133 states and 324 transitions. Second operand 15 states. [2020-09-14 12:40:12,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:12,467 INFO L93 Difference]: Finished difference Result 232 states and 545 transitions. [2020-09-14 12:40:12,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-14 12:40:12,468 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:40:12,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:12,469 INFO L225 Difference]: With dead ends: 232 [2020-09-14 12:40:12,469 INFO L226 Difference]: Without dead ends: 224 [2020-09-14 12:40:12,470 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-09-14 12:40:12,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-09-14 12:40:12,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 130. [2020-09-14 12:40:12,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-09-14 12:40:12,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 305 transitions. [2020-09-14 12:40:12,473 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 305 transitions. Word has length 13 [2020-09-14 12:40:12,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:12,473 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 305 transitions. [2020-09-14 12:40:12,473 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:40:12,473 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 305 transitions. [2020-09-14 12:40:12,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:40:12,474 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:12,474 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:12,674 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:40:12,675 INFO L427 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:12,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:12,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1141268816, now seen corresponding path program 6 times [2020-09-14 12:40:12,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:12,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855459719] [2020-09-14 12:40:12,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:12,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:12,823 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:12,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855459719] [2020-09-14 12:40:12,824 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495092044] [2020-09-14 12:40:12,824 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:40:12,876 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-14 12:40:12,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:40:12,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:40:12,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:13,052 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:40:13,117 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:13,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:13,117 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-09-14 12:40:13,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772300765] [2020-09-14 12:40:13,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-14 12:40:13,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:13,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-14 12:40:13,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-09-14 12:40:13,119 INFO L87 Difference]: Start difference. First operand 130 states and 305 transitions. Second operand 18 states. [2020-09-14 12:40:13,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:13,434 INFO L93 Difference]: Finished difference Result 185 states and 431 transitions. [2020-09-14 12:40:13,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-14 12:40:13,436 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 13 [2020-09-14 12:40:13,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:13,437 INFO L225 Difference]: With dead ends: 185 [2020-09-14 12:40:13,437 INFO L226 Difference]: Without dead ends: 180 [2020-09-14 12:40:13,438 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2020-09-14 12:40:13,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-09-14 12:40:13,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 139. [2020-09-14 12:40:13,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-14 12:40:13,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-09-14 12:40:13,441 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-09-14 12:40:13,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:13,442 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-09-14 12:40:13,442 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-14 12:40:13,442 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-09-14 12:40:13,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:40:13,442 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:13,442 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:13,654 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2020-09-14 12:40:13,654 INFO L427 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:13,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:13,654 INFO L82 PathProgramCache]: Analyzing trace with hash 33766584, now seen corresponding path program 21 times [2020-09-14 12:40:13,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:13,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824515681] [2020-09-14 12:40:13,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:13,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:13,875 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:13,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824515681] [2020-09-14 12:40:13,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11100125] [2020-09-14 12:40:13,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:40:13,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-14 12:40:13,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:40:13,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:40:13,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:14,147 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:14,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:14,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:40:14,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602039173] [2020-09-14 12:40:14,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:40:14,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:14,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:40:14,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:40:14,148 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 17 states. [2020-09-14 12:40:14,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:14,226 INFO L93 Difference]: Finished difference Result 180 states and 423 transitions. [2020-09-14 12:40:14,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-14 12:40:14,227 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-14 12:40:14,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:14,228 INFO L225 Difference]: With dead ends: 180 [2020-09-14 12:40:14,228 INFO L226 Difference]: Without dead ends: 177 [2020-09-14 12:40:14,229 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:40:14,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-09-14 12:40:14,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 148. [2020-09-14 12:40:14,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-09-14 12:40:14,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 362 transitions. [2020-09-14 12:40:14,233 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 362 transitions. Word has length 13 [2020-09-14 12:40:14,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:14,233 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 362 transitions. [2020-09-14 12:40:14,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:40:14,233 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 362 transitions. [2020-09-14 12:40:14,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:40:14,234 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:14,234 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:14,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-09-14 12:40:14,435 INFO L427 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:14,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:14,435 INFO L82 PathProgramCache]: Analyzing trace with hash -913710200, now seen corresponding path program 22 times [2020-09-14 12:40:14,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:14,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574644079] [2020-09-14 12:40:14,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:14,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:14,632 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:14,632 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574644079] [2020-09-14 12:40:14,632 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024797491] [2020-09-14 12:40:14,632 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:40:14,681 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:40:14,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:40:14,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:40:14,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:14,892 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:14,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:14,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:40:14,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372120066] [2020-09-14 12:40:14,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:40:14,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:14,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:40:14,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:40:14,894 INFO L87 Difference]: Start difference. First operand 148 states and 362 transitions. Second operand 17 states. [2020-09-14 12:40:15,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:15,017 INFO L93 Difference]: Finished difference Result 197 states and 456 transitions. [2020-09-14 12:40:15,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-14 12:40:15,018 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-14 12:40:15,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:15,019 INFO L225 Difference]: With dead ends: 197 [2020-09-14 12:40:15,019 INFO L226 Difference]: Without dead ends: 194 [2020-09-14 12:40:15,019 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-09-14 12:40:15,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-09-14 12:40:15,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 148. [2020-09-14 12:40:15,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-09-14 12:40:15,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 362 transitions. [2020-09-14 12:40:15,022 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 362 transitions. Word has length 13 [2020-09-14 12:40:15,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:15,022 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 362 transitions. [2020-09-14 12:40:15,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:40:15,022 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 362 transitions. [2020-09-14 12:40:15,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:40:15,023 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:15,023 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:15,223 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:40:15,224 INFO L427 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:15,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:15,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1775557960, now seen corresponding path program 23 times [2020-09-14 12:40:15,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:15,225 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887883260] [2020-09-14 12:40:15,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:15,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:15,429 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:15,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887883260] [2020-09-14 12:40:15,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205440063] [2020-09-14 12:40:15,430 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:40:15,492 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-14 12:40:15,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:40:15,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:40:15,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:15,699 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:15,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:15,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:40:15,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750392352] [2020-09-14 12:40:15,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:40:15,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:15,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:40:15,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:40:15,701 INFO L87 Difference]: Start difference. First operand 148 states and 362 transitions. Second operand 17 states. [2020-09-14 12:40:15,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:15,828 INFO L93 Difference]: Finished difference Result 196 states and 456 transitions. [2020-09-14 12:40:15,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-14 12:40:15,829 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-14 12:40:15,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:15,830 INFO L225 Difference]: With dead ends: 196 [2020-09-14 12:40:15,830 INFO L226 Difference]: Without dead ends: 193 [2020-09-14 12:40:15,831 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:40:15,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-09-14 12:40:15,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 149. [2020-09-14 12:40:15,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-09-14 12:40:15,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 367 transitions. [2020-09-14 12:40:15,834 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 367 transitions. Word has length 13 [2020-09-14 12:40:15,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:15,834 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 367 transitions. [2020-09-14 12:40:15,834 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:40:15,834 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 367 transitions. [2020-09-14 12:40:15,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:40:15,835 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:15,835 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:16,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:40:16,036 INFO L427 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:16,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:16,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1110622840, now seen corresponding path program 24 times [2020-09-14 12:40:16,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:16,037 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334341525] [2020-09-14 12:40:16,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:16,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:16,180 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:16,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334341525] [2020-09-14 12:40:16,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190737641] [2020-09-14 12:40:16,181 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:40:16,233 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-14 12:40:16,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:40:16,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:40:16,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:16,435 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:16,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:16,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:40:16,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809812362] [2020-09-14 12:40:16,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:40:16,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:16,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:40:16,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:40:16,437 INFO L87 Difference]: Start difference. First operand 149 states and 367 transitions. Second operand 17 states. [2020-09-14 12:40:16,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:16,635 INFO L93 Difference]: Finished difference Result 195 states and 456 transitions. [2020-09-14 12:40:16,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-14 12:40:16,636 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-14 12:40:16,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:16,637 INFO L225 Difference]: With dead ends: 195 [2020-09-14 12:40:16,637 INFO L226 Difference]: Without dead ends: 192 [2020-09-14 12:40:16,638 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2020-09-14 12:40:16,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-09-14 12:40:16,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 150. [2020-09-14 12:40:16,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-09-14 12:40:16,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 372 transitions. [2020-09-14 12:40:16,641 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 372 transitions. Word has length 13 [2020-09-14 12:40:16,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:16,641 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 372 transitions. [2020-09-14 12:40:16,641 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:40:16,641 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 372 transitions. [2020-09-14 12:40:16,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:40:16,642 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:16,642 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:16,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:40:16,842 INFO L427 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:16,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:16,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1089173320, now seen corresponding path program 25 times [2020-09-14 12:40:16,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:16,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542854735] [2020-09-14 12:40:16,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:16,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:17,009 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:17,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542854735] [2020-09-14 12:40:17,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741422324] [2020-09-14 12:40:17,010 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:40:17,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:17,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:40:17,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:17,276 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:17,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:17,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:40:17,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601426594] [2020-09-14 12:40:17,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:40:17,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:17,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:40:17,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:40:17,278 INFO L87 Difference]: Start difference. First operand 150 states and 372 transitions. Second operand 17 states. [2020-09-14 12:40:17,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:17,506 INFO L93 Difference]: Finished difference Result 194 states and 456 transitions. [2020-09-14 12:40:17,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-14 12:40:17,508 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-14 12:40:17,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:17,508 INFO L225 Difference]: With dead ends: 194 [2020-09-14 12:40:17,508 INFO L226 Difference]: Without dead ends: 191 [2020-09-14 12:40:17,509 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-09-14 12:40:17,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-09-14 12:40:17,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 152. [2020-09-14 12:40:17,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-09-14 12:40:17,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 379 transitions. [2020-09-14 12:40:17,512 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 379 transitions. Word has length 13 [2020-09-14 12:40:17,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:17,512 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 379 transitions. [2020-09-14 12:40:17,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:40:17,512 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 379 transitions. [2020-09-14 12:40:17,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:40:17,513 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:17,513 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:17,721 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:40:17,721 INFO L427 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:17,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:17,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1088481400, now seen corresponding path program 26 times [2020-09-14 12:40:17,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:17,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935021312] [2020-09-14 12:40:17,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:17,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:17,847 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:17,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935021312] [2020-09-14 12:40:17,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222632700] [2020-09-14 12:40:17,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:40:17,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:40:17,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:40:17,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:40:17,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:18,111 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:18,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:18,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:40:18,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575934174] [2020-09-14 12:40:18,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:40:18,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:18,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:40:18,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:40:18,112 INFO L87 Difference]: Start difference. First operand 152 states and 379 transitions. Second operand 17 states. [2020-09-14 12:40:18,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:18,375 INFO L93 Difference]: Finished difference Result 193 states and 456 transitions. [2020-09-14 12:40:18,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-14 12:40:18,376 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-14 12:40:18,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:18,377 INFO L225 Difference]: With dead ends: 193 [2020-09-14 12:40:18,378 INFO L226 Difference]: Without dead ends: 190 [2020-09-14 12:40:18,378 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-09-14 12:40:18,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-09-14 12:40:18,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 154. [2020-09-14 12:40:18,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-09-14 12:40:18,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 386 transitions. [2020-09-14 12:40:18,381 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 386 transitions. Word has length 13 [2020-09-14 12:40:18,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:18,381 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 386 transitions. [2020-09-14 12:40:18,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:40:18,382 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 386 transitions. [2020-09-14 12:40:18,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:40:18,382 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:18,382 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:18,582 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2020-09-14 12:40:18,583 INFO L427 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:18,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:18,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1088459080, now seen corresponding path program 27 times [2020-09-14 12:40:18,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:18,584 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617227217] [2020-09-14 12:40:18,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:18,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:18,714 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:18,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617227217] [2020-09-14 12:40:18,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582511807] [2020-09-14 12:40:18,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:40:18,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-14 12:40:18,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:40:18,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:40:18,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:18,966 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:40:18,985 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:18,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:18,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:40:18,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790037651] [2020-09-14 12:40:18,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:40:18,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:18,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:40:18,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:40:18,987 INFO L87 Difference]: Start difference. First operand 154 states and 386 transitions. Second operand 17 states. [2020-09-14 12:40:19,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:19,329 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-09-14 12:40:19,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-14 12:40:19,330 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-14 12:40:19,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:19,331 INFO L225 Difference]: With dead ends: 202 [2020-09-14 12:40:19,331 INFO L226 Difference]: Without dead ends: 196 [2020-09-14 12:40:19,331 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2020-09-14 12:40:19,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-09-14 12:40:19,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 151. [2020-09-14 12:40:19,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-09-14 12:40:19,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 382 transitions. [2020-09-14 12:40:19,335 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 382 transitions. Word has length 13 [2020-09-14 12:40:19,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:19,335 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 382 transitions. [2020-09-14 12:40:19,335 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:40:19,335 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 382 transitions. [2020-09-14 12:40:19,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:40:19,336 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:19,336 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:19,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-09-14 12:40:19,546 INFO L427 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:19,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:19,547 INFO L82 PathProgramCache]: Analyzing trace with hash -195697579, now seen corresponding path program 113 times [2020-09-14 12:40:19,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:19,547 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042697630] [2020-09-14 12:40:19,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:19,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:19,712 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:19,712 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042697630] [2020-09-14 12:40:19,712 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390646950] [2020-09-14 12:40:19,713 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:40:19,764 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-14 12:40:19,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:40:19,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:40:19,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:19,991 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:19,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:19,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:40:19,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992563773] [2020-09-14 12:40:19,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:40:19,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:19,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:40:19,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:40:19,992 INFO L87 Difference]: Start difference. First operand 151 states and 382 transitions. Second operand 17 states. [2020-09-14 12:40:20,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:20,072 INFO L93 Difference]: Finished difference Result 188 states and 456 transitions. [2020-09-14 12:40:20,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-14 12:40:20,073 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:40:20,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:20,074 INFO L225 Difference]: With dead ends: 188 [2020-09-14 12:40:20,074 INFO L226 Difference]: Without dead ends: 186 [2020-09-14 12:40:20,075 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:40:20,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-09-14 12:40:20,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 159. [2020-09-14 12:40:20,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-09-14 12:40:20,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 406 transitions. [2020-09-14 12:40:20,078 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 406 transitions. Word has length 14 [2020-09-14 12:40:20,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:20,078 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 406 transitions. [2020-09-14 12:40:20,078 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:40:20,078 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 406 transitions. [2020-09-14 12:40:20,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:40:20,078 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:20,078 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:20,279 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-09-14 12:40:20,279 INFO L427 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:20,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:20,280 INFO L82 PathProgramCache]: Analyzing trace with hash -195696618, now seen corresponding path program 114 times [2020-09-14 12:40:20,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:20,280 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333826571] [2020-09-14 12:40:20,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:20,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:20,447 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:20,448 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333826571] [2020-09-14 12:40:20,448 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433753585] [2020-09-14 12:40:20,448 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:40:20,501 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-14 12:40:20,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:40:20,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:40:20,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:20,733 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:20,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:20,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:40:20,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401862273] [2020-09-14 12:40:20,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:40:20,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:20,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:40:20,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:40:20,735 INFO L87 Difference]: Start difference. First operand 159 states and 406 transitions. Second operand 17 states. [2020-09-14 12:40:21,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:21,031 INFO L93 Difference]: Finished difference Result 199 states and 478 transitions. [2020-09-14 12:40:21,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-14 12:40:21,033 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:40:21,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:21,033 INFO L225 Difference]: With dead ends: 199 [2020-09-14 12:40:21,034 INFO L226 Difference]: Without dead ends: 197 [2020-09-14 12:40:21,034 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2020-09-14 12:40:21,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-09-14 12:40:21,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 157. [2020-09-14 12:40:21,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-09-14 12:40:21,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 400 transitions. [2020-09-14 12:40:21,037 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 400 transitions. Word has length 14 [2020-09-14 12:40:21,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:21,037 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 400 transitions. [2020-09-14 12:40:21,037 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:40:21,038 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 400 transitions. [2020-09-14 12:40:21,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:40:21,038 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:21,038 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:21,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-09-14 12:40:21,239 INFO L427 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:21,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:21,240 INFO L82 PathProgramCache]: Analyzing trace with hash -195667788, now seen corresponding path program 115 times [2020-09-14 12:40:21,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:21,240 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823524024] [2020-09-14 12:40:21,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:21,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:21,405 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:21,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823524024] [2020-09-14 12:40:21,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042031609] [2020-09-14 12:40:21,406 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:40:21,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:21,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:40:21,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:21,753 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:21,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:21,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:40:21,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978629818] [2020-09-14 12:40:21,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:40:21,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:21,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:40:21,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:40:21,754 INFO L87 Difference]: Start difference. First operand 157 states and 400 transitions. Second operand 17 states. [2020-09-14 12:40:22,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:22,129 INFO L93 Difference]: Finished difference Result 210 states and 500 transitions. [2020-09-14 12:40:22,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-14 12:40:22,131 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:40:22,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:22,131 INFO L225 Difference]: With dead ends: 210 [2020-09-14 12:40:22,131 INFO L226 Difference]: Without dead ends: 208 [2020-09-14 12:40:22,132 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=174, Invalid=332, Unknown=0, NotChecked=0, Total=506 [2020-09-14 12:40:22,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-09-14 12:40:22,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 155. [2020-09-14 12:40:22,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-09-14 12:40:22,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 394 transitions. [2020-09-14 12:40:22,135 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 394 transitions. Word has length 14 [2020-09-14 12:40:22,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:22,135 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 394 transitions. [2020-09-14 12:40:22,135 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:40:22,135 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 394 transitions. [2020-09-14 12:40:22,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:40:22,136 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:22,136 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:22,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-09-14 12:40:22,337 INFO L427 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:22,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:22,338 INFO L82 PathProgramCache]: Analyzing trace with hash -194774058, now seen corresponding path program 116 times [2020-09-14 12:40:22,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:22,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835850311] [2020-09-14 12:40:22,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:22,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:22,501 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:22,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835850311] [2020-09-14 12:40:22,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567272226] [2020-09-14 12:40:22,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:40:22,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:40:22,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:40:22,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:40:22,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:22,833 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:22,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:22,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:40:22,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447206294] [2020-09-14 12:40:22,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:40:22,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:22,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:40:22,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:40:22,834 INFO L87 Difference]: Start difference. First operand 155 states and 394 transitions. Second operand 17 states. [2020-09-14 12:40:23,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:23,252 INFO L93 Difference]: Finished difference Result 210 states and 500 transitions. [2020-09-14 12:40:23,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-14 12:40:23,253 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:40:23,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:23,254 INFO L225 Difference]: With dead ends: 210 [2020-09-14 12:40:23,254 INFO L226 Difference]: Without dead ends: 208 [2020-09-14 12:40:23,255 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2020-09-14 12:40:23,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-09-14 12:40:23,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 157. [2020-09-14 12:40:23,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-09-14 12:40:23,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 400 transitions. [2020-09-14 12:40:23,258 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 400 transitions. Word has length 14 [2020-09-14 12:40:23,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:23,259 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 400 transitions. [2020-09-14 12:40:23,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:40:23,259 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 400 transitions. [2020-09-14 12:40:23,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:40:23,259 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:23,260 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:23,463 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2020-09-14 12:40:23,464 INFO L427 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:23,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:23,464 INFO L82 PathProgramCache]: Analyzing trace with hash -194773097, now seen corresponding path program 117 times [2020-09-14 12:40:23,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:23,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88020691] [2020-09-14 12:40:23,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:23,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:23,632 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:23,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88020691] [2020-09-14 12:40:23,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145868689] [2020-09-14 12:40:23,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:40:23,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-14 12:40:23,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:40:23,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:40:23,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:27,532 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:27,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:27,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:40:27,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108918480] [2020-09-14 12:40:27,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:40:27,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:27,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:40:27,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=187, Unknown=1, NotChecked=0, Total=272 [2020-09-14 12:40:27,533 INFO L87 Difference]: Start difference. First operand 157 states and 400 transitions. Second operand 17 states. [2020-09-14 12:40:31,782 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-09-14 12:40:32,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:32,101 INFO L93 Difference]: Finished difference Result 218 states and 517 transitions. [2020-09-14 12:40:32,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-14 12:40:32,102 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:40:32,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:32,103 INFO L225 Difference]: With dead ends: 218 [2020-09-14 12:40:32,103 INFO L226 Difference]: Without dead ends: 216 [2020-09-14 12:40:32,104 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=183, Invalid=368, Unknown=1, NotChecked=0, Total=552 [2020-09-14 12:40:32,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-09-14 12:40:32,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 156. [2020-09-14 12:40:32,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-09-14 12:40:32,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-09-14 12:40:32,108 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-09-14 12:40:32,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:32,108 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-09-14 12:40:32,108 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:40:32,108 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-09-14 12:40:32,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:40:32,108 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:32,108 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:32,309 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:40:32,309 INFO L427 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:32,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:32,310 INFO L82 PathProgramCache]: Analyzing trace with hash -194744267, now seen corresponding path program 118 times [2020-09-14 12:40:32,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:32,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026236174] [2020-09-14 12:40:32,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:32,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:32,471 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:32,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026236174] [2020-09-14 12:40:32,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726219776] [2020-09-14 12:40:32,472 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:40:32,525 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:40:32,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:40:32,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:40:32,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:32,813 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:32,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:32,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:40:32,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375498449] [2020-09-14 12:40:32,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:40:32,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:32,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:40:32,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:40:32,814 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-09-14 12:40:33,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:33,263 INFO L93 Difference]: Finished difference Result 212 states and 507 transitions. [2020-09-14 12:40:33,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-14 12:40:33,264 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:40:33,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:33,265 INFO L225 Difference]: With dead ends: 212 [2020-09-14 12:40:33,265 INFO L226 Difference]: Without dead ends: 210 [2020-09-14 12:40:33,265 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2020-09-14 12:40:33,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-09-14 12:40:33,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 153. [2020-09-14 12:40:33,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-09-14 12:40:33,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 388 transitions. [2020-09-14 12:40:33,268 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 388 transitions. Word has length 14 [2020-09-14 12:40:33,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:33,268 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 388 transitions. [2020-09-14 12:40:33,268 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:40:33,268 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 388 transitions. [2020-09-14 12:40:33,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:40:33,269 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:33,269 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:33,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:40:33,470 INFO L427 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:33,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:33,470 INFO L82 PathProgramCache]: Analyzing trace with hash -167068428, now seen corresponding path program 119 times [2020-09-14 12:40:33,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:33,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854833629] [2020-09-14 12:40:33,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:33,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:33,628 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:33,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854833629] [2020-09-14 12:40:33,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500640734] [2020-09-14 12:40:33,629 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:40:33,686 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-14 12:40:33,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:40:33,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:40:33,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:33,908 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:33,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:33,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:40:33,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493495063] [2020-09-14 12:40:33,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:40:33,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:33,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:40:33,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:40:33,910 INFO L87 Difference]: Start difference. First operand 153 states and 388 transitions. Second operand 17 states. [2020-09-14 12:40:34,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:34,369 INFO L93 Difference]: Finished difference Result 212 states and 504 transitions. [2020-09-14 12:40:34,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-14 12:40:34,370 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:40:34,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:34,371 INFO L225 Difference]: With dead ends: 212 [2020-09-14 12:40:34,371 INFO L226 Difference]: Without dead ends: 210 [2020-09-14 12:40:34,372 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2020-09-14 12:40:34,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-09-14 12:40:34,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 156. [2020-09-14 12:40:34,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-09-14 12:40:34,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-09-14 12:40:34,375 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-09-14 12:40:34,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:34,375 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-09-14 12:40:34,375 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:40:34,375 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-09-14 12:40:34,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:40:34,375 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:34,376 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:34,576 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:40:34,576 INFO L427 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:34,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:34,577 INFO L82 PathProgramCache]: Analyzing trace with hash -167067467, now seen corresponding path program 120 times [2020-09-14 12:40:34,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:34,578 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46742051] [2020-09-14 12:40:34,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:34,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:34,747 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:34,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46742051] [2020-09-14 12:40:34,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119578856] [2020-09-14 12:40:34,748 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:40:34,799 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-14 12:40:34,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:40:34,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:40:34,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:35,042 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:35,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:35,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:40:35,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678040230] [2020-09-14 12:40:35,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:40:35,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:35,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:40:35,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:40:35,044 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-09-14 12:40:35,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:35,528 INFO L93 Difference]: Finished difference Result 224 states and 529 transitions. [2020-09-14 12:40:35,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-14 12:40:35,529 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:40:35,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:35,530 INFO L225 Difference]: With dead ends: 224 [2020-09-14 12:40:35,530 INFO L226 Difference]: Without dead ends: 222 [2020-09-14 12:40:35,531 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2020-09-14 12:40:35,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-09-14 12:40:35,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 156. [2020-09-14 12:40:35,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-09-14 12:40:35,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-09-14 12:40:35,535 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-09-14 12:40:35,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:35,535 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-09-14 12:40:35,535 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:40:35,535 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-09-14 12:40:35,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:40:35,536 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:35,536 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:35,746 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:40:35,747 INFO L427 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:35,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:35,747 INFO L82 PathProgramCache]: Analyzing trace with hash -167038637, now seen corresponding path program 121 times [2020-09-14 12:40:35,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:35,748 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176290003] [2020-09-14 12:40:35,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:35,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:35,907 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:35,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176290003] [2020-09-14 12:40:35,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677208376] [2020-09-14 12:40:35,908 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:40:35,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:35,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:40:35,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:36,177 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:36,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:36,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:40:36,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294804940] [2020-09-14 12:40:36,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:40:36,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:36,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:40:36,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:40:36,179 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-09-14 12:40:36,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:36,592 INFO L93 Difference]: Finished difference Result 218 states and 519 transitions. [2020-09-14 12:40:36,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-14 12:40:36,592 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:40:36,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:36,593 INFO L225 Difference]: With dead ends: 218 [2020-09-14 12:40:36,593 INFO L226 Difference]: Without dead ends: 216 [2020-09-14 12:40:36,593 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2020-09-14 12:40:36,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-09-14 12:40:36,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 156. [2020-09-14 12:40:36,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-09-14 12:40:36,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-09-14 12:40:36,597 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-09-14 12:40:36,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:36,597 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-09-14 12:40:36,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:40:36,597 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-09-14 12:40:36,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:40:36,597 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:36,598 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:36,798 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:40:36,798 INFO L427 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:36,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:36,799 INFO L82 PathProgramCache]: Analyzing trace with hash -166114155, now seen corresponding path program 122 times [2020-09-14 12:40:36,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:36,800 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565471860] [2020-09-14 12:40:36,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:36,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:36,962 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:36,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565471860] [2020-09-14 12:40:36,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887931678] [2020-09-14 12:40:36,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:40:37,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:40:37,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:40:37,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:40:37,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:37,220 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:37,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:37,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:40:37,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307891260] [2020-09-14 12:40:37,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:40:37,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:37,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:40:37,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:40:37,222 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-09-14 12:40:37,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:37,569 INFO L93 Difference]: Finished difference Result 206 states and 492 transitions. [2020-09-14 12:40:37,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-14 12:40:37,570 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:40:37,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:37,571 INFO L225 Difference]: With dead ends: 206 [2020-09-14 12:40:37,571 INFO L226 Difference]: Without dead ends: 204 [2020-09-14 12:40:37,571 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-09-14 12:40:37,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-09-14 12:40:37,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 154. [2020-09-14 12:40:37,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-09-14 12:40:37,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 389 transitions. [2020-09-14 12:40:37,575 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 389 transitions. Word has length 14 [2020-09-14 12:40:37,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:37,575 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 389 transitions. [2020-09-14 12:40:37,575 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:40:37,575 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 389 transitions. [2020-09-14 12:40:37,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:40:37,575 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:37,575 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:37,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-09-14 12:40:37,776 INFO L427 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:37,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:37,777 INFO L82 PathProgramCache]: Analyzing trace with hash 691806102, now seen corresponding path program 123 times [2020-09-14 12:40:37,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:37,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049184827] [2020-09-14 12:40:37,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:37,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:37,951 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:37,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049184827] [2020-09-14 12:40:37,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293296953] [2020-09-14 12:40:37,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:40:38,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-14 12:40:38,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:40:38,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:40:38,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:38,210 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:38,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:38,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:40:38,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919788980] [2020-09-14 12:40:38,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:40:38,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:38,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:40:38,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:40:38,211 INFO L87 Difference]: Start difference. First operand 154 states and 389 transitions. Second operand 17 states. [2020-09-14 12:40:38,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:38,569 INFO L93 Difference]: Finished difference Result 207 states and 495 transitions. [2020-09-14 12:40:38,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-14 12:40:38,570 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:40:38,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:38,571 INFO L225 Difference]: With dead ends: 207 [2020-09-14 12:40:38,571 INFO L226 Difference]: Without dead ends: 205 [2020-09-14 12:40:38,572 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-09-14 12:40:38,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-09-14 12:40:38,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 159. [2020-09-14 12:40:38,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-09-14 12:40:38,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 403 transitions. [2020-09-14 12:40:38,575 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 403 transitions. Word has length 14 [2020-09-14 12:40:38,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:38,575 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 403 transitions. [2020-09-14 12:40:38,575 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:40:38,576 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 403 transitions. [2020-09-14 12:40:38,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:40:38,576 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:38,576 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:38,787 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-09-14 12:40:38,787 INFO L427 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:38,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:38,787 INFO L82 PathProgramCache]: Analyzing trace with hash 691807063, now seen corresponding path program 124 times [2020-09-14 12:40:38,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:38,788 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073075383] [2020-09-14 12:40:38,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:38,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:38,959 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:38,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073075383] [2020-09-14 12:40:38,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955208177] [2020-09-14 12:40:38,960 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:40:39,013 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:40:39,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:40:39,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:40:39,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:39,231 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:39,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:39,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:40:39,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515557008] [2020-09-14 12:40:39,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:40:39,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:39,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:40:39,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:40:39,233 INFO L87 Difference]: Start difference. First operand 159 states and 403 transitions. Second operand 17 states. [2020-09-14 12:40:39,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:39,605 INFO L93 Difference]: Finished difference Result 217 states and 516 transitions. [2020-09-14 12:40:39,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-14 12:40:39,606 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:40:39,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:39,607 INFO L225 Difference]: With dead ends: 217 [2020-09-14 12:40:39,608 INFO L226 Difference]: Without dead ends: 215 [2020-09-14 12:40:39,608 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2020-09-14 12:40:39,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-09-14 12:40:39,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 158. [2020-09-14 12:40:39,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-09-14 12:40:39,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 400 transitions. [2020-09-14 12:40:39,611 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 400 transitions. Word has length 14 [2020-09-14 12:40:39,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:39,611 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 400 transitions. [2020-09-14 12:40:39,611 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:40:39,611 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 400 transitions. [2020-09-14 12:40:39,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:40:39,612 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:39,612 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:39,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-09-14 12:40:39,813 INFO L427 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:39,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:39,813 INFO L82 PathProgramCache]: Analyzing trace with hash 691835893, now seen corresponding path program 125 times [2020-09-14 12:40:39,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:39,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134619424] [2020-09-14 12:40:39,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:39,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:39,994 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:39,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134619424] [2020-09-14 12:40:39,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895029708] [2020-09-14 12:40:39,995 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:40:40,047 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-14 12:40:40,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:40:40,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:40:40,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:41,628 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:41,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:41,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:40:41,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142797825] [2020-09-14 12:40:41,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:40:41,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:41,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:40:41,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:40:41,630 INFO L87 Difference]: Start difference. First operand 158 states and 400 transitions. Second operand 17 states. [2020-09-14 12:40:42,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:42,151 INFO L93 Difference]: Finished difference Result 223 states and 528 transitions. [2020-09-14 12:40:42,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-14 12:40:42,152 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:40:42,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:42,153 INFO L225 Difference]: With dead ends: 223 [2020-09-14 12:40:42,153 INFO L226 Difference]: Without dead ends: 221 [2020-09-14 12:40:42,153 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=197, Invalid=403, Unknown=0, NotChecked=0, Total=600 [2020-09-14 12:40:42,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-09-14 12:40:42,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 162. [2020-09-14 12:40:42,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-14 12:40:42,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 411 transitions. [2020-09-14 12:40:42,157 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 411 transitions. Word has length 14 [2020-09-14 12:40:42,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:42,158 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 411 transitions. [2020-09-14 12:40:42,158 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:40:42,158 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 411 transitions. [2020-09-14 12:40:42,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:40:42,158 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:42,158 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:42,361 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-09-14 12:40:42,361 INFO L427 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:42,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:42,362 INFO L82 PathProgramCache]: Analyzing trace with hash 692730584, now seen corresponding path program 126 times [2020-09-14 12:40:42,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:42,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753682784] [2020-09-14 12:40:42,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:42,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:42,538 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:42,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753682784] [2020-09-14 12:40:42,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927339611] [2020-09-14 12:40:42,538 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:40:42,599 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-14 12:40:42,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:40:42,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:40:42,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:42,814 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:42,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:42,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:40:42,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683198877] [2020-09-14 12:40:42,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:40:42,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:42,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:40:42,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:40:42,816 INFO L87 Difference]: Start difference. First operand 162 states and 411 transitions. Second operand 17 states. [2020-09-14 12:40:43,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:43,228 INFO L93 Difference]: Finished difference Result 225 states and 531 transitions. [2020-09-14 12:40:43,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-14 12:40:43,229 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:40:43,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:43,230 INFO L225 Difference]: With dead ends: 225 [2020-09-14 12:40:43,230 INFO L226 Difference]: Without dead ends: 223 [2020-09-14 12:40:43,230 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2020-09-14 12:40:43,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-09-14 12:40:43,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 161. [2020-09-14 12:40:43,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-09-14 12:40:43,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 407 transitions. [2020-09-14 12:40:43,234 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 407 transitions. Word has length 14 [2020-09-14 12:40:43,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:43,234 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 407 transitions. [2020-09-14 12:40:43,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:40:43,234 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 407 transitions. [2020-09-14 12:40:43,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:40:43,235 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:43,235 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:43,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:40:43,436 INFO L427 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:43,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:43,436 INFO L82 PathProgramCache]: Analyzing trace with hash 720435253, now seen corresponding path program 127 times [2020-09-14 12:40:43,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:43,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236178783] [2020-09-14 12:40:43,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:43,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:43,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:43,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236178783] [2020-09-14 12:40:43,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961530690] [2020-09-14 12:40:43,628 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:40:43,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:43,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:40:43,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:43,916 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:43,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:43,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:40:43,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625426994] [2020-09-14 12:40:43,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:40:43,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:43,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:40:43,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:40:43,918 INFO L87 Difference]: Start difference. First operand 161 states and 407 transitions. Second operand 17 states. [2020-09-14 12:40:44,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:44,332 INFO L93 Difference]: Finished difference Result 214 states and 509 transitions. [2020-09-14 12:40:44,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-14 12:40:44,334 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:40:44,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:44,334 INFO L225 Difference]: With dead ends: 214 [2020-09-14 12:40:44,335 INFO L226 Difference]: Without dead ends: 212 [2020-09-14 12:40:44,335 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2020-09-14 12:40:44,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-09-14 12:40:44,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 160. [2020-09-14 12:40:44,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-09-14 12:40:44,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 404 transitions. [2020-09-14 12:40:44,338 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 404 transitions. Word has length 14 [2020-09-14 12:40:44,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:44,339 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 404 transitions. [2020-09-14 12:40:44,339 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:40:44,339 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 404 transitions. [2020-09-14 12:40:44,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:40:44,339 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:44,339 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:44,540 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:40:44,540 INFO L427 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:44,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:44,541 INFO L82 PathProgramCache]: Analyzing trace with hash 721388565, now seen corresponding path program 128 times [2020-09-14 12:40:44,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:44,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627619487] [2020-09-14 12:40:44,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:44,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:44,763 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:44,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627619487] [2020-09-14 12:40:44,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521868989] [2020-09-14 12:40:44,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:40:44,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:40:44,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:40:44,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:40:44,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:45,052 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:45,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:45,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:40:45,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131200450] [2020-09-14 12:40:45,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:40:45,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:45,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:40:45,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:40:45,054 INFO L87 Difference]: Start difference. First operand 160 states and 404 transitions. Second operand 17 states. [2020-09-14 12:40:45,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:45,344 INFO L93 Difference]: Finished difference Result 203 states and 486 transitions. [2020-09-14 12:40:45,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-14 12:40:45,345 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:40:45,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:45,346 INFO L225 Difference]: With dead ends: 203 [2020-09-14 12:40:45,346 INFO L226 Difference]: Without dead ends: 201 [2020-09-14 12:40:45,346 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2020-09-14 12:40:45,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-09-14 12:40:45,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 158. [2020-09-14 12:40:45,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-09-14 12:40:45,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 397 transitions. [2020-09-14 12:40:45,350 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 397 transitions. Word has length 14 [2020-09-14 12:40:45,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:45,350 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 397 transitions. [2020-09-14 12:40:45,350 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:40:45,350 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 397 transitions. [2020-09-14 12:40:45,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:40:45,351 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:45,351 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:45,551 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2020-09-14 12:40:45,552 INFO L427 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:45,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:45,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1998481017, now seen corresponding path program 129 times [2020-09-14 12:40:45,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:45,553 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831763152] [2020-09-14 12:40:45,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:45,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:45,803 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:45,803 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831763152] [2020-09-14 12:40:45,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891331376] [2020-09-14 12:40:45,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:40:45,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-14 12:40:45,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:40:45,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:40:45,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:46,085 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:46,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:46,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:40:46,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090499212] [2020-09-14 12:40:46,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:40:46,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:46,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:40:46,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:40:46,087 INFO L87 Difference]: Start difference. First operand 158 states and 397 transitions. Second operand 17 states. [2020-09-14 12:40:46,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:46,193 INFO L93 Difference]: Finished difference Result 212 states and 504 transitions. [2020-09-14 12:40:46,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-14 12:40:46,194 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:40:46,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:46,195 INFO L225 Difference]: With dead ends: 212 [2020-09-14 12:40:46,195 INFO L226 Difference]: Without dead ends: 210 [2020-09-14 12:40:46,196 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-09-14 12:40:46,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-09-14 12:40:46,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 166. [2020-09-14 12:40:46,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-14 12:40:46,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 421 transitions. [2020-09-14 12:40:46,198 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 421 transitions. Word has length 14 [2020-09-14 12:40:46,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:46,199 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 421 transitions. [2020-09-14 12:40:46,199 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:40:46,199 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 421 transitions. [2020-09-14 12:40:46,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:40:46,199 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:46,199 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:46,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:40:46,400 INFO L427 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:46,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:46,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1998480056, now seen corresponding path program 130 times [2020-09-14 12:40:46,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:46,401 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831582466] [2020-09-14 12:40:46,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:46,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:46,627 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:46,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831582466] [2020-09-14 12:40:46,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979926594] [2020-09-14 12:40:46,628 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:40:46,678 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:40:46,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:40:46,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:40:46,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:46,898 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:46,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:46,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:40:46,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950522002] [2020-09-14 12:40:46,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:40:46,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:46,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:40:46,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:40:46,899 INFO L87 Difference]: Start difference. First operand 166 states and 421 transitions. Second operand 17 states. [2020-09-14 12:40:47,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:47,247 INFO L93 Difference]: Finished difference Result 217 states and 513 transitions. [2020-09-14 12:40:47,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-14 12:40:47,248 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:40:47,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:47,249 INFO L225 Difference]: With dead ends: 217 [2020-09-14 12:40:47,249 INFO L226 Difference]: Without dead ends: 215 [2020-09-14 12:40:47,249 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-09-14 12:40:47,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-09-14 12:40:47,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 164. [2020-09-14 12:40:47,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-14 12:40:47,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 415 transitions. [2020-09-14 12:40:47,252 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 415 transitions. Word has length 14 [2020-09-14 12:40:47,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:47,252 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 415 transitions. [2020-09-14 12:40:47,252 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:40:47,253 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 415 transitions. [2020-09-14 12:40:47,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:40:47,253 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:47,253 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:47,453 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:40:47,454 INFO L427 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:47,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:47,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1998451226, now seen corresponding path program 131 times [2020-09-14 12:40:47,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:47,455 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261854405] [2020-09-14 12:40:47,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:47,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:47,651 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:47,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261854405] [2020-09-14 12:40:47,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506288695] [2020-09-14 12:40:47,652 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:40:47,703 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-14 12:40:47,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:40:47,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:40:47,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:47,993 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:47,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:47,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:40:47,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488598367] [2020-09-14 12:40:47,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:40:47,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:47,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:40:47,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:40:47,995 INFO L87 Difference]: Start difference. First operand 164 states and 415 transitions. Second operand 17 states. [2020-09-14 12:40:48,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:48,424 INFO L93 Difference]: Finished difference Result 227 states and 533 transitions. [2020-09-14 12:40:48,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-14 12:40:48,425 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:40:48,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:48,426 INFO L225 Difference]: With dead ends: 227 [2020-09-14 12:40:48,426 INFO L226 Difference]: Without dead ends: 225 [2020-09-14 12:40:48,426 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-09-14 12:40:48,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-09-14 12:40:48,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 162. [2020-09-14 12:40:48,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-14 12:40:48,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 409 transitions. [2020-09-14 12:40:48,429 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 409 transitions. Word has length 14 [2020-09-14 12:40:48,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:48,430 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 409 transitions. [2020-09-14 12:40:48,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:40:48,430 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 409 transitions. [2020-09-14 12:40:48,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:40:48,430 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:48,430 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:48,631 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:40:48,631 INFO L427 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:48,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:48,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1997557496, now seen corresponding path program 132 times [2020-09-14 12:40:48,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:48,632 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477102990] [2020-09-14 12:40:48,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:48,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:48,829 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:48,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477102990] [2020-09-14 12:40:48,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208527907] [2020-09-14 12:40:48,830 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:40:48,885 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-14 12:40:48,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:40:48,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:40:48,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:49,181 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:49,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:49,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:40:49,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110186059] [2020-09-14 12:40:49,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:40:49,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:49,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:40:49,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:40:49,182 INFO L87 Difference]: Start difference. First operand 162 states and 409 transitions. Second operand 17 states. [2020-09-14 12:40:49,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:49,759 INFO L93 Difference]: Finished difference Result 227 states and 533 transitions. [2020-09-14 12:40:49,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-14 12:40:49,760 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:40:49,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:49,760 INFO L225 Difference]: With dead ends: 227 [2020-09-14 12:40:49,760 INFO L226 Difference]: Without dead ends: 225 [2020-09-14 12:40:49,761 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=208, Invalid=442, Unknown=0, NotChecked=0, Total=650 [2020-09-14 12:40:49,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-09-14 12:40:49,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 164. [2020-09-14 12:40:49,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-14 12:40:49,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 415 transitions. [2020-09-14 12:40:49,764 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 415 transitions. Word has length 14 [2020-09-14 12:40:49,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:49,764 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 415 transitions. [2020-09-14 12:40:49,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:40:49,764 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 415 transitions. [2020-09-14 12:40:49,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:40:49,765 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:49,765 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:49,967 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2020-09-14 12:40:49,967 INFO L427 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:49,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:49,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1997556535, now seen corresponding path program 133 times [2020-09-14 12:40:49,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:49,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166618960] [2020-09-14 12:40:49,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:49,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:50,139 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:50,140 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166618960] [2020-09-14 12:40:50,140 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586479800] [2020-09-14 12:40:50,140 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:40:50,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:50,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:40:50,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:53,953 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:53,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:53,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:40:53,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110344424] [2020-09-14 12:40:53,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:40:53,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:53,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:40:53,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=200, Unknown=1, NotChecked=0, Total=272 [2020-09-14 12:40:53,955 INFO L87 Difference]: Start difference. First operand 164 states and 415 transitions. Second operand 17 states. [2020-09-14 12:40:58,236 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-09-14 12:40:58,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:58,634 INFO L93 Difference]: Finished difference Result 237 states and 553 transitions. [2020-09-14 12:40:58,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-14 12:40:58,635 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:40:58,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:58,635 INFO L225 Difference]: With dead ends: 237 [2020-09-14 12:40:58,636 INFO L226 Difference]: Without dead ends: 235 [2020-09-14 12:40:58,636 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=205, Invalid=444, Unknown=1, NotChecked=0, Total=650 [2020-09-14 12:40:58,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-09-14 12:40:58,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 163. [2020-09-14 12:40:58,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-14 12:40:58,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-09-14 12:40:58,640 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-09-14 12:40:58,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:58,640 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-09-14 12:40:58,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:40:58,640 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-09-14 12:40:58,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:40:58,640 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:58,641 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:58,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-09-14 12:40:58,842 INFO L427 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:58,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:58,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1997527705, now seen corresponding path program 134 times [2020-09-14 12:40:58,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:58,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241321791] [2020-09-14 12:40:58,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:58,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:59,025 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:59,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241321791] [2020-09-14 12:40:59,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911367598] [2020-09-14 12:40:59,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:40:59,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:40:59,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:40:59,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:40:59,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:59,365 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:59,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:59,365 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:40:59,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668028639] [2020-09-14 12:40:59,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:40:59,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:59,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:40:59,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:40:59,366 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-09-14 12:40:59,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:59,947 INFO L93 Difference]: Finished difference Result 229 states and 539 transitions. [2020-09-14 12:40:59,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-14 12:40:59,948 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:40:59,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:59,949 INFO L225 Difference]: With dead ends: 229 [2020-09-14 12:40:59,949 INFO L226 Difference]: Without dead ends: 227 [2020-09-14 12:40:59,949 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2020-09-14 12:40:59,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-09-14 12:40:59,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 160. [2020-09-14 12:40:59,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-09-14 12:40:59,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 403 transitions. [2020-09-14 12:40:59,953 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 403 transitions. Word has length 14 [2020-09-14 12:40:59,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:59,953 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 403 transitions. [2020-09-14 12:40:59,953 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:40:59,954 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 403 transitions. [2020-09-14 12:40:59,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:40:59,954 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:59,954 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:41:00,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2020-09-14 12:41:00,155 INFO L427 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:41:00,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:41:00,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1969851866, now seen corresponding path program 135 times [2020-09-14 12:41:00,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:41:00,156 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837536366] [2020-09-14 12:41:00,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:41:00,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:41:00,328 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:00,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837536366] [2020-09-14 12:41:00,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522986784] [2020-09-14 12:41:00,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:41:00,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-14 12:41:00,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:41:00,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:41:00,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:41:00,596 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:00,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:41:00,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:41:00,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656940477] [2020-09-14 12:41:00,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:41:00,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:41:00,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:41:00,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:41:00,598 INFO L87 Difference]: Start difference. First operand 160 states and 403 transitions. Second operand 17 states. [2020-09-14 12:41:01,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:41:01,162 INFO L93 Difference]: Finished difference Result 225 states and 529 transitions. [2020-09-14 12:41:01,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-14 12:41:01,164 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:41:01,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:41:01,165 INFO L225 Difference]: With dead ends: 225 [2020-09-14 12:41:01,165 INFO L226 Difference]: Without dead ends: 223 [2020-09-14 12:41:01,165 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2020-09-14 12:41:01,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-09-14 12:41:01,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 163. [2020-09-14 12:41:01,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-14 12:41:01,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-09-14 12:41:01,168 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-09-14 12:41:01,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:41:01,168 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-09-14 12:41:01,168 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:41:01,168 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-09-14 12:41:01,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:41:01,169 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:41:01,169 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:41:01,369 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-09-14 12:41:01,370 INFO L427 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:41:01,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:41:01,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1969850905, now seen corresponding path program 136 times [2020-09-14 12:41:01,370 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:41:01,371 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720174435] [2020-09-14 12:41:01,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:41:01,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:41:01,550 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:01,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720174435] [2020-09-14 12:41:01,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789640265] [2020-09-14 12:41:01,551 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:41:01,602 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:41:01,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:41:01,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:41:01,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:41:01,884 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:01,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:41:01,885 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:41:01,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820075867] [2020-09-14 12:41:01,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:41:01,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:41:01,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:41:01,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:41:01,887 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-09-14 12:41:02,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:41:02,599 INFO L93 Difference]: Finished difference Result 239 states and 557 transitions. [2020-09-14 12:41:02,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-14 12:41:02,599 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:41:02,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:41:02,600 INFO L225 Difference]: With dead ends: 239 [2020-09-14 12:41:02,600 INFO L226 Difference]: Without dead ends: 237 [2020-09-14 12:41:02,601 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=248, Invalid=564, Unknown=0, NotChecked=0, Total=812 [2020-09-14 12:41:02,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-09-14 12:41:02,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 163. [2020-09-14 12:41:02,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-14 12:41:02,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-09-14 12:41:02,604 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-09-14 12:41:02,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:41:02,605 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-09-14 12:41:02,605 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:41:02,605 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-09-14 12:41:02,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:41:02,605 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:41:02,605 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:41:02,806 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-09-14 12:41:02,806 INFO L427 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:41:02,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:41:02,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1969822075, now seen corresponding path program 137 times [2020-09-14 12:41:02,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:41:02,807 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460772296] [2020-09-14 12:41:02,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:41:02,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:41:02,971 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:02,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460772296] [2020-09-14 12:41:02,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18485517] [2020-09-14 12:41:02,972 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:41:03,024 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-14 12:41:03,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:41:03,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:41:03,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:41:03,244 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:03,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:41:03,245 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:41:03,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131690494] [2020-09-14 12:41:03,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:41:03,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:41:03,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:41:03,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:41:03,246 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-09-14 12:41:03,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:41:03,761 INFO L93 Difference]: Finished difference Result 234 states and 550 transitions. [2020-09-14 12:41:03,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-14 12:41:03,763 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:41:03,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:41:03,764 INFO L225 Difference]: With dead ends: 234 [2020-09-14 12:41:03,764 INFO L226 Difference]: Without dead ends: 232 [2020-09-14 12:41:03,764 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2020-09-14 12:41:03,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-09-14 12:41:03,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 163. [2020-09-14 12:41:03,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-14 12:41:03,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-09-14 12:41:03,768 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-09-14 12:41:03,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:41:03,768 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-09-14 12:41:03,768 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:41:03,768 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-09-14 12:41:03,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:41:03,769 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:41:03,769 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:41:03,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2020-09-14 12:41:03,977 INFO L427 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:41:03,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:41:03,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1968897593, now seen corresponding path program 138 times [2020-09-14 12:41:03,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:41:03,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767910663] [2020-09-14 12:41:03,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:41:03,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:41:04,143 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:04,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767910663] [2020-09-14 12:41:04,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285483875] [2020-09-14 12:41:04,144 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:41:04,197 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-14 12:41:04,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:41:04,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:41:04,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:41:04,412 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:04,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:41:04,412 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:41:04,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123358736] [2020-09-14 12:41:04,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:41:04,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:41:04,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:41:04,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:41:04,414 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-09-14 12:41:04,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:41:04,853 INFO L93 Difference]: Finished difference Result 218 states and 515 transitions. [2020-09-14 12:41:04,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-14 12:41:04,854 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:41:04,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:41:04,855 INFO L225 Difference]: With dead ends: 218 [2020-09-14 12:41:04,855 INFO L226 Difference]: Without dead ends: 216 [2020-09-14 12:41:04,856 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-09-14 12:41:04,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-09-14 12:41:04,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 159. [2020-09-14 12:41:04,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-09-14 12:41:04,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 399 transitions. [2020-09-14 12:41:04,858 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 399 transitions. Word has length 14 [2020-09-14 12:41:04,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:41:04,858 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 399 transitions. [2020-09-14 12:41:04,858 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:41:04,858 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 399 transitions. [2020-09-14 12:41:04,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:41:04,859 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:41:04,859 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:41:05,059 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:41:05,060 INFO L427 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:41:05,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:41:05,060 INFO L82 PathProgramCache]: Analyzing trace with hash 575763989, now seen corresponding path program 139 times [2020-09-14 12:41:05,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:41:05,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815430887] [2020-09-14 12:41:05,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:41:05,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:41:05,285 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:05,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815430887] [2020-09-14 12:41:05,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548396428] [2020-09-14 12:41:05,286 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:41:05,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:41:05,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:41:05,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:41:05,557 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:05,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:41:05,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:41:05,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133108883] [2020-09-14 12:41:05,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:41:05,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:41:05,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:41:05,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:41:05,559 INFO L87 Difference]: Start difference. First operand 159 states and 399 transitions. Second operand 17 states. [2020-09-14 12:41:05,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:41:05,726 INFO L93 Difference]: Finished difference Result 208 states and 495 transitions. [2020-09-14 12:41:05,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-14 12:41:05,727 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:41:05,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:41:05,728 INFO L225 Difference]: With dead ends: 208 [2020-09-14 12:41:05,728 INFO L226 Difference]: Without dead ends: 206 [2020-09-14 12:41:05,728 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:41:05,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-09-14 12:41:05,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 165. [2020-09-14 12:41:05,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-09-14 12:41:05,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 417 transitions. [2020-09-14 12:41:05,731 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 417 transitions. Word has length 14 [2020-09-14 12:41:05,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:41:05,731 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 417 transitions. [2020-09-14 12:41:05,731 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:41:05,731 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 417 transitions. [2020-09-14 12:41:05,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:41:05,732 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:41:05,732 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:41:05,932 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:41:05,933 INFO L427 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:41:05,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:41:05,933 INFO L82 PathProgramCache]: Analyzing trace with hash 575764950, now seen corresponding path program 140 times [2020-09-14 12:41:05,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:41:05,934 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370772046] [2020-09-14 12:41:05,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:41:05,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:41:06,139 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:06,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370772046] [2020-09-14 12:41:06,140 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362799001] [2020-09-14 12:41:06,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:41:06,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:41:06,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:41:06,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:41:06,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:41:06,411 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:06,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:41:06,412 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:41:06,412 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536440942] [2020-09-14 12:41:06,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:41:06,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:41:06,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:41:06,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:41:06,413 INFO L87 Difference]: Start difference. First operand 165 states and 417 transitions. Second operand 17 states. [2020-09-14 12:41:06,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:41:06,810 INFO L93 Difference]: Finished difference Result 229 states and 536 transitions. [2020-09-14 12:41:06,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-14 12:41:06,811 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:41:06,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:41:06,812 INFO L225 Difference]: With dead ends: 229 [2020-09-14 12:41:06,812 INFO L226 Difference]: Without dead ends: 227 [2020-09-14 12:41:06,812 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=170, Invalid=382, Unknown=0, NotChecked=0, Total=552 [2020-09-14 12:41:06,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-09-14 12:41:06,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 163. [2020-09-14 12:41:06,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-14 12:41:06,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 411 transitions. [2020-09-14 12:41:06,815 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 411 transitions. Word has length 14 [2020-09-14 12:41:06,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:41:06,815 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 411 transitions. [2020-09-14 12:41:06,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:41:06,816 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 411 transitions. [2020-09-14 12:41:06,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:41:06,816 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:41:06,816 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:41:07,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:41:07,017 INFO L427 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:41:07,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:41:07,018 INFO L82 PathProgramCache]: Analyzing trace with hash 575793780, now seen corresponding path program 141 times [2020-09-14 12:41:07,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:41:07,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869369158] [2020-09-14 12:41:07,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:41:07,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:41:07,200 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:07,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869369158] [2020-09-14 12:41:07,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510558430] [2020-09-14 12:41:07,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:41:07,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-14 12:41:07,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:41:07,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:41:07,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:41:07,537 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:07,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:41:07,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:41:07,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887452018] [2020-09-14 12:41:07,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:41:07,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:41:07,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:41:07,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:41:07,539 INFO L87 Difference]: Start difference. First operand 163 states and 411 transitions. Second operand 17 states. [2020-09-14 12:41:08,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:41:08,044 INFO L93 Difference]: Finished difference Result 235 states and 548 transitions. [2020-09-14 12:41:08,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-14 12:41:08,045 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:41:08,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:41:08,046 INFO L225 Difference]: With dead ends: 235 [2020-09-14 12:41:08,046 INFO L226 Difference]: Without dead ends: 233 [2020-09-14 12:41:08,046 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2020-09-14 12:41:08,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-09-14 12:41:08,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 161. [2020-09-14 12:41:08,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-09-14 12:41:08,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 405 transitions. [2020-09-14 12:41:08,050 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 405 transitions. Word has length 14 [2020-09-14 12:41:08,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:41:08,050 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 405 transitions. [2020-09-14 12:41:08,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:41:08,050 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 405 transitions. [2020-09-14 12:41:08,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:41:08,050 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:41:08,051 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:41:08,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:41:08,251 INFO L427 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:41:08,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:41:08,252 INFO L82 PathProgramCache]: Analyzing trace with hash 576687510, now seen corresponding path program 142 times [2020-09-14 12:41:08,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:41:08,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318558398] [2020-09-14 12:41:08,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:41:08,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:41:08,421 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:08,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318558398] [2020-09-14 12:41:08,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846214428] [2020-09-14 12:41:08,423 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:41:08,474 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:41:08,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:41:08,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:41:08,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:41:08,758 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:08,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:41:08,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:41:08,759 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265031798] [2020-09-14 12:41:08,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:41:08,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:41:08,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:41:08,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:41:08,759 INFO L87 Difference]: Start difference. First operand 161 states and 405 transitions. Second operand 17 states. [2020-09-14 12:41:09,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:41:09,352 INFO L93 Difference]: Finished difference Result 233 states and 544 transitions. [2020-09-14 12:41:09,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-14 12:41:09,353 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:41:09,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:41:09,354 INFO L225 Difference]: With dead ends: 233 [2020-09-14 12:41:09,354 INFO L226 Difference]: Without dead ends: 231 [2020-09-14 12:41:09,354 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=216, Invalid=486, Unknown=0, NotChecked=0, Total=702 [2020-09-14 12:41:09,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-09-14 12:41:09,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 163. [2020-09-14 12:41:09,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-14 12:41:09,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 411 transitions. [2020-09-14 12:41:09,359 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 411 transitions. Word has length 14 [2020-09-14 12:41:09,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:41:09,359 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 411 transitions. [2020-09-14 12:41:09,359 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:41:09,359 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 411 transitions. [2020-09-14 12:41:09,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:41:09,360 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:41:09,360 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:41:09,569 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:41:09,569 INFO L427 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:41:09,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:41:09,569 INFO L82 PathProgramCache]: Analyzing trace with hash 576688471, now seen corresponding path program 143 times [2020-09-14 12:41:09,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:41:09,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269005776] [2020-09-14 12:41:09,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:41:09,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:41:09,735 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:09,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269005776] [2020-09-14 12:41:09,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645643718] [2020-09-14 12:41:09,736 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:41:09,792 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:41:09,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:41:09,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:41:09,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:41:12,974 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:12,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:41:12,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:41:12,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633361494] [2020-09-14 12:41:12,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:41:12,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:41:12,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:41:12,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=208, Unknown=1, NotChecked=0, Total=272 [2020-09-14 12:41:12,976 INFO L87 Difference]: Start difference. First operand 163 states and 411 transitions. Second operand 17 states. [2020-09-14 12:41:17,305 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-09-14 12:41:17,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:41:17,758 INFO L93 Difference]: Finished difference Result 241 states and 560 transitions. [2020-09-14 12:41:17,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-14 12:41:17,759 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:41:17,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:41:17,759 INFO L225 Difference]: With dead ends: 241 [2020-09-14 12:41:17,759 INFO L226 Difference]: Without dead ends: 239 [2020-09-14 12:41:17,760 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=211, Invalid=490, Unknown=1, NotChecked=0, Total=702 [2020-09-14 12:41:17,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-09-14 12:41:17,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 163. [2020-09-14 12:41:17,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-14 12:41:17,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 410 transitions. [2020-09-14 12:41:17,763 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 410 transitions. Word has length 14 [2020-09-14 12:41:17,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:41:17,764 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 410 transitions. [2020-09-14 12:41:17,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:41:17,764 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 410 transitions. [2020-09-14 12:41:17,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:41:17,764 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:41:17,765 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:41:17,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:41:17,975 INFO L427 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:41:17,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:41:17,976 INFO L82 PathProgramCache]: Analyzing trace with hash 576717301, now seen corresponding path program 144 times [2020-09-14 12:41:17,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:41:17,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873593041] [2020-09-14 12:41:17,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:41:17,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:41:18,128 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:18,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873593041] [2020-09-14 12:41:18,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546084462] [2020-09-14 12:41:18,129 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:41:18,178 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-14 12:41:18,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:41:18,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:41:18,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:41:18,472 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:18,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:41:18,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:41:18,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798806663] [2020-09-14 12:41:18,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:41:18,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:41:18,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:41:18,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:41:18,473 INFO L87 Difference]: Start difference. First operand 163 states and 410 transitions. Second operand 17 states. [2020-09-14 12:41:19,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:41:19,105 INFO L93 Difference]: Finished difference Result 233 states and 548 transitions. [2020-09-14 12:41:19,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-14 12:41:19,106 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:41:19,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:41:19,107 INFO L225 Difference]: With dead ends: 233 [2020-09-14 12:41:19,107 INFO L226 Difference]: Without dead ends: 231 [2020-09-14 12:41:19,108 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2020-09-14 12:41:19,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-09-14 12:41:19,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 160. [2020-09-14 12:41:19,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-09-14 12:41:19,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 401 transitions. [2020-09-14 12:41:19,111 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 401 transitions. Word has length 14 [2020-09-14 12:41:19,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:41:19,111 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 401 transitions. [2020-09-14 12:41:19,111 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:41:19,111 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 401 transitions. [2020-09-14 12:41:19,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:41:19,112 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:41:19,112 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:41:19,312 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2020-09-14 12:41:19,313 INFO L427 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:41:19,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:41:19,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1212993479, now seen corresponding path program 145 times [2020-09-14 12:41:19,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:41:19,314 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011730039] [2020-09-14 12:41:19,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:41:19,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:41:19,530 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:19,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011730039] [2020-09-14 12:41:19,531 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619249826] [2020-09-14 12:41:19,531 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:41:19,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:41:19,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:41:19,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:41:19,795 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:19,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:41:19,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:41:19,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184706519] [2020-09-14 12:41:19,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:41:19,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:41:19,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:41:19,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:41:19,797 INFO L87 Difference]: Start difference. First operand 160 states and 401 transitions. Second operand 17 states. [2020-09-14 12:41:20,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:41:20,004 INFO L93 Difference]: Finished difference Result 204 states and 486 transitions. [2020-09-14 12:41:20,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-14 12:41:20,006 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:41:20,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:41:20,006 INFO L225 Difference]: With dead ends: 204 [2020-09-14 12:41:20,006 INFO L226 Difference]: Without dead ends: 202 [2020-09-14 12:41:20,007 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2020-09-14 12:41:20,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-09-14 12:41:20,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 164. [2020-09-14 12:41:20,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-14 12:41:20,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 413 transitions. [2020-09-14 12:41:20,010 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 413 transitions. Word has length 14 [2020-09-14 12:41:20,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:41:20,010 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 413 transitions. [2020-09-14 12:41:20,010 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:41:20,011 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 413 transitions. [2020-09-14 12:41:20,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:41:20,011 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:41:20,011 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:41:20,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:41:20,212 INFO L427 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:41:20,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:41:20,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1212994440, now seen corresponding path program 146 times [2020-09-14 12:41:20,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:41:20,213 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304281922] [2020-09-14 12:41:20,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:41:20,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:41:20,406 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:20,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304281922] [2020-09-14 12:41:20,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919328325] [2020-09-14 12:41:20,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:41:20,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:41:20,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:41:20,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:41:20,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:41:20,688 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:20,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:41:20,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:41:20,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142361617] [2020-09-14 12:41:20,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:41:20,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:41:20,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:41:20,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:41:20,690 INFO L87 Difference]: Start difference. First operand 164 states and 413 transitions. Second operand 17 states. [2020-09-14 12:41:21,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:41:21,146 INFO L93 Difference]: Finished difference Result 225 states and 527 transitions. [2020-09-14 12:41:21,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-14 12:41:21,147 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:41:21,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:41:21,148 INFO L225 Difference]: With dead ends: 225 [2020-09-14 12:41:21,148 INFO L226 Difference]: Without dead ends: 223 [2020-09-14 12:41:21,148 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2020-09-14 12:41:21,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-09-14 12:41:21,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 162. [2020-09-14 12:41:21,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-14 12:41:21,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 407 transitions. [2020-09-14 12:41:21,151 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 407 transitions. Word has length 14 [2020-09-14 12:41:21,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:41:21,151 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 407 transitions. [2020-09-14 12:41:21,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:41:21,152 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 407 transitions. [2020-09-14 12:41:21,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:41:21,152 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:41:21,152 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:41:21,353 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2020-09-14 12:41:21,353 INFO L427 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:41:21,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:41:21,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1213023270, now seen corresponding path program 147 times [2020-09-14 12:41:21,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:41:21,354 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009071043] [2020-09-14 12:41:21,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:41:21,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:41:21,521 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:21,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009071043] [2020-09-14 12:41:21,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672634857] [2020-09-14 12:41:21,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:41:21,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-14 12:41:21,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:41:21,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:41:21,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:41:21,845 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:21,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:41:21,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:41:21,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971894059] [2020-09-14 12:41:21,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:41:21,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:41:21,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:41:21,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:41:21,846 INFO L87 Difference]: Start difference. First operand 162 states and 407 transitions. Second operand 17 states. [2020-09-14 12:41:22,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:41:22,386 INFO L93 Difference]: Finished difference Result 231 states and 539 transitions. [2020-09-14 12:41:22,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-14 12:41:22,387 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:41:22,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:41:22,388 INFO L225 Difference]: With dead ends: 231 [2020-09-14 12:41:22,388 INFO L226 Difference]: Without dead ends: 229 [2020-09-14 12:41:22,389 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=200, Invalid=450, Unknown=0, NotChecked=0, Total=650 [2020-09-14 12:41:22,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-09-14 12:41:22,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 161. [2020-09-14 12:41:22,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-09-14 12:41:22,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 403 transitions. [2020-09-14 12:41:22,392 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 403 transitions. Word has length 14 [2020-09-14 12:41:22,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:41:22,392 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 403 transitions. [2020-09-14 12:41:22,392 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:41:22,392 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 403 transitions. [2020-09-14 12:41:22,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:41:22,392 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:41:22,392 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:41:22,595 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:41:22,595 INFO L427 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:41:22,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:41:22,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1233549269, now seen corresponding path program 148 times [2020-09-14 12:41:22,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:41:22,596 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717895041] [2020-09-14 12:41:22,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:41:22,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:41:22,791 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:22,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717895041] [2020-09-14 12:41:22,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853202800] [2020-09-14 12:41:22,792 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:41:22,845 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:41:22,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:41:22,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:41:22,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:41:23,073 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:23,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:41:23,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:41:23,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852892383] [2020-09-14 12:41:23,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:41:23,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:41:23,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:41:23,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:41:23,075 INFO L87 Difference]: Start difference. First operand 161 states and 403 transitions. Second operand 17 states. [2020-09-14 12:41:23,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:41:23,339 INFO L93 Difference]: Finished difference Result 200 states and 477 transitions. [2020-09-14 12:41:23,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-14 12:41:23,341 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:41:23,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:41:23,341 INFO L225 Difference]: With dead ends: 200 [2020-09-14 12:41:23,341 INFO L226 Difference]: Without dead ends: 198 [2020-09-14 12:41:23,342 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-09-14 12:41:23,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-09-14 12:41:23,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 163. [2020-09-14 12:41:23,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-14 12:41:23,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 409 transitions. [2020-09-14 12:41:23,345 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 409 transitions. Word has length 14 [2020-09-14 12:41:23,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:41:23,345 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 409 transitions. [2020-09-14 12:41:23,345 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:41:23,345 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 409 transitions. [2020-09-14 12:41:23,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:41:23,346 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:41:23,346 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:41:23,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:41:23,547 INFO L427 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:41:23,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:41:23,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1233550230, now seen corresponding path program 149 times [2020-09-14 12:41:23,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:41:23,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138139088] [2020-09-14 12:41:23,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:41:23,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:41:23,725 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:23,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138139088] [2020-09-14 12:41:23,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993347858] [2020-09-14 12:41:23,726 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:41:23,779 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-14 12:41:23,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:41:23,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:41:23,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:41:24,013 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:24,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:41:24,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:41:24,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640880866] [2020-09-14 12:41:24,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:41:24,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:41:24,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:41:24,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:41:24,015 INFO L87 Difference]: Start difference. First operand 163 states and 409 transitions. Second operand 17 states. [2020-09-14 12:41:24,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:41:24,559 INFO L93 Difference]: Finished difference Result 221 states and 518 transitions. [2020-09-14 12:41:24,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-14 12:41:24,561 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:41:24,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:41:24,562 INFO L225 Difference]: With dead ends: 221 [2020-09-14 12:41:24,562 INFO L226 Difference]: Without dead ends: 219 [2020-09-14 12:41:24,562 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=204, Invalid=446, Unknown=0, NotChecked=0, Total=650 [2020-09-14 12:41:24,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-09-14 12:41:24,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 162. [2020-09-14 12:41:24,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-14 12:41:24,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 405 transitions. [2020-09-14 12:41:24,565 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 405 transitions. Word has length 14 [2020-09-14 12:41:24,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:41:24,565 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 405 transitions. [2020-09-14 12:41:24,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:41:24,566 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 405 transitions. [2020-09-14 12:41:24,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:41:24,566 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:41:24,566 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:41:24,775 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2020-09-14 12:41:24,775 INFO L427 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:41:24,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:41:24,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1234212359, now seen corresponding path program 150 times [2020-09-14 12:41:24,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:41:24,776 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948500951] [2020-09-14 12:41:24,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:41:24,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:41:24,945 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:24,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948500951] [2020-09-14 12:41:24,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082910069] [2020-09-14 12:41:24,946 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:41:24,999 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-14 12:41:24,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:41:25,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-14 12:41:25,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:41:25,039 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:25,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:41:25,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-14 12:41:25,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503880781] [2020-09-14 12:41:25,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-14 12:41:25,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:41:25,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-14 12:41:25,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-09-14 12:41:25,041 INFO L87 Difference]: Start difference. First operand 162 states and 405 transitions. Second operand 11 states. [2020-09-14 12:41:25,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:41:25,274 INFO L93 Difference]: Finished difference Result 201 states and 476 transitions. [2020-09-14 12:41:25,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-14 12:41:25,275 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-14 12:41:25,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:41:25,276 INFO L225 Difference]: With dead ends: 201 [2020-09-14 12:41:25,276 INFO L226 Difference]: Without dead ends: 199 [2020-09-14 12:41:25,276 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2020-09-14 12:41:25,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-09-14 12:41:25,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 166. [2020-09-14 12:41:25,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-14 12:41:25,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-09-14 12:41:25,279 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-09-14 12:41:25,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:41:25,280 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-09-14 12:41:25,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-14 12:41:25,280 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-09-14 12:41:25,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:41:25,280 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:41:25,280 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:41:25,481 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:41:25,481 INFO L427 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:41:25,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:41:25,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1234234679, now seen corresponding path program 151 times [2020-09-14 12:41:25,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:41:25,482 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53569506] [2020-09-14 12:41:25,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:41:25,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:41:25,639 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:25,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53569506] [2020-09-14 12:41:25,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043055212] [2020-09-14 12:41:25,640 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:41:25,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:41:25,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:41:25,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:41:25,909 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:41:25,972 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:25,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:41:25,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:41:25,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692366777] [2020-09-14 12:41:25,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:41:25,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:41:25,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:41:25,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:41:25,975 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 17 states. [2020-09-14 12:41:26,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:41:26,647 INFO L93 Difference]: Finished difference Result 226 states and 539 transitions. [2020-09-14 12:41:26,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-14 12:41:26,648 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:41:26,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:41:26,649 INFO L225 Difference]: With dead ends: 226 [2020-09-14 12:41:26,649 INFO L226 Difference]: Without dead ends: 221 [2020-09-14 12:41:26,650 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-09-14 12:41:26,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-09-14 12:41:26,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 164. [2020-09-14 12:41:26,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-14 12:41:26,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 404 transitions. [2020-09-14 12:41:26,653 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 404 transitions. Word has length 14 [2020-09-14 12:41:26,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:41:26,653 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 404 transitions. [2020-09-14 12:41:26,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:41:26,653 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 404 transitions. [2020-09-14 12:41:26,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:41:26,653 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:41:26,653 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:41:26,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:41:26,854 INFO L427 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:41:26,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:41:26,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1234242150, now seen corresponding path program 152 times [2020-09-14 12:41:26,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:41:26,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558283574] [2020-09-14 12:41:26,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:41:26,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:41:27,010 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:27,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558283574] [2020-09-14 12:41:27,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665398113] [2020-09-14 12:41:27,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:41:27,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:41:27,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:41:27,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:41:27,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:41:27,313 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:27,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:41:27,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:41:27,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093624591] [2020-09-14 12:41:27,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:41:27,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:41:27,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:41:27,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:41:27,315 INFO L87 Difference]: Start difference. First operand 164 states and 404 transitions. Second operand 17 states. [2020-09-14 12:41:27,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:41:27,882 INFO L93 Difference]: Finished difference Result 218 states and 517 transitions. [2020-09-14 12:41:27,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-14 12:41:27,883 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:41:27,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:41:27,884 INFO L225 Difference]: With dead ends: 218 [2020-09-14 12:41:27,884 INFO L226 Difference]: Without dead ends: 216 [2020-09-14 12:41:27,885 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=217, Invalid=485, Unknown=0, NotChecked=0, Total=702 [2020-09-14 12:41:27,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-09-14 12:41:27,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 166. [2020-09-14 12:41:27,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-14 12:41:27,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-09-14 12:41:27,888 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-09-14 12:41:27,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:41:27,888 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-09-14 12:41:27,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:41:27,888 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-09-14 12:41:27,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:41:27,889 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:41:27,889 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:41:28,089 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:41:28,090 INFO L427 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:41:28,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:41:28,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1234263509, now seen corresponding path program 153 times [2020-09-14 12:41:28,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:41:28,091 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365664345] [2020-09-14 12:41:28,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:41:28,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:41:28,243 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:28,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365664345] [2020-09-14 12:41:28,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106248776] [2020-09-14 12:41:28,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:41:28,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-14 12:41:28,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:41:28,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:41:28,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:41:28,512 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:41:28,571 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:28,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:41:28,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:41:28,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251521706] [2020-09-14 12:41:28,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:41:28,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:41:28,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:41:28,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:41:28,573 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 17 states. [2020-09-14 12:41:29,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:41:29,445 INFO L93 Difference]: Finished difference Result 248 states and 590 transitions. [2020-09-14 12:41:29,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-14 12:41:29,447 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:41:29,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:41:29,447 INFO L225 Difference]: With dead ends: 248 [2020-09-14 12:41:29,447 INFO L226 Difference]: Without dead ends: 243 [2020-09-14 12:41:29,448 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-09-14 12:41:29,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-09-14 12:41:29,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 166. [2020-09-14 12:41:29,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-14 12:41:29,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-09-14 12:41:29,452 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-09-14 12:41:29,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:41:29,452 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-09-14 12:41:29,452 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:41:29,452 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-09-14 12:41:29,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:41:29,453 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:41:29,453 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:41:29,654 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:41:29,654 INFO L427 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:41:29,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:41:29,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1234264470, now seen corresponding path program 154 times [2020-09-14 12:41:29,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:41:29,656 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587473168] [2020-09-14 12:41:29,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:41:29,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:41:29,808 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:29,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587473168] [2020-09-14 12:41:29,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207686646] [2020-09-14 12:41:29,814 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:41:29,863 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:41:29,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:41:29,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:41:29,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:41:30,070 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:41:30,098 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:30,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:41:30,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:41:30,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27157345] [2020-09-14 12:41:30,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:41:30,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:41:30,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:41:30,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:41:30,099 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 17 states. [2020-09-14 12:41:30,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:41:30,748 INFO L93 Difference]: Finished difference Result 238 states and 567 transitions. [2020-09-14 12:41:30,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-14 12:41:30,749 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:41:30,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:41:30,750 INFO L225 Difference]: With dead ends: 238 [2020-09-14 12:41:30,750 INFO L226 Difference]: Without dead ends: 233 [2020-09-14 12:41:30,750 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-09-14 12:41:30,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-09-14 12:41:30,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 162. [2020-09-14 12:41:30,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-14 12:41:30,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 397 transitions. [2020-09-14 12:41:30,753 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 397 transitions. Word has length 14 [2020-09-14 12:41:30,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:41:30,754 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 397 transitions. [2020-09-14 12:41:30,754 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:41:30,754 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 397 transitions. [2020-09-14 12:41:30,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:41:30,754 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:41:30,754 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:41:30,955 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:41:30,955 INFO L427 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:41:30,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:41:30,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1234472790, now seen corresponding path program 155 times [2020-09-14 12:41:30,956 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:41:30,956 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945096336] [2020-09-14 12:41:30,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:41:30,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:41:31,107 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:31,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945096336] [2020-09-14 12:41:31,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390321070] [2020-09-14 12:41:31,108 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:41:31,160 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-14 12:41:31,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:41:31,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:41:31,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:41:31,443 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:31,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:41:31,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:41:31,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245306249] [2020-09-14 12:41:31,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:41:31,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:41:31,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:41:31,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:41:31,444 INFO L87 Difference]: Start difference. First operand 162 states and 397 transitions. Second operand 17 states. [2020-09-14 12:41:32,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:41:32,128 INFO L93 Difference]: Finished difference Result 235 states and 547 transitions. [2020-09-14 12:41:32,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-14 12:41:32,129 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:41:32,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:41:32,130 INFO L225 Difference]: With dead ends: 235 [2020-09-14 12:41:32,130 INFO L226 Difference]: Without dead ends: 233 [2020-09-14 12:41:32,130 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=201, Invalid=501, Unknown=0, NotChecked=0, Total=702 [2020-09-14 12:41:32,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-09-14 12:41:32,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 164. [2020-09-14 12:41:32,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-14 12:41:32,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 404 transitions. [2020-09-14 12:41:32,134 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 404 transitions. Word has length 14 [2020-09-14 12:41:32,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:41:32,135 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 404 transitions. [2020-09-14 12:41:32,135 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:41:32,135 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 404 transitions. [2020-09-14 12:41:32,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:41:32,135 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:41:32,136 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:41:32,344 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:41:32,344 INFO L427 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:41:32,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:41:32,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1235135880, now seen corresponding path program 156 times [2020-09-14 12:41:32,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:41:32,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404819197] [2020-09-14 12:41:32,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:41:32,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:41:32,494 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:32,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404819197] [2020-09-14 12:41:32,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157986937] [2020-09-14 12:41:32,495 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:41:32,550 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-14 12:41:32,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:41:32,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:41:32,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:41:32,842 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:32,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:41:32,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:41:32,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788334239] [2020-09-14 12:41:32,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:41:32,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:41:32,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:41:32,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:41:32,843 INFO L87 Difference]: Start difference. First operand 164 states and 404 transitions. Second operand 17 states. [2020-09-14 12:41:33,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:41:33,715 INFO L93 Difference]: Finished difference Result 252 states and 594 transitions. [2020-09-14 12:41:33,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-14 12:41:33,717 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:41:33,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:41:33,718 INFO L225 Difference]: With dead ends: 252 [2020-09-14 12:41:33,718 INFO L226 Difference]: Without dead ends: 250 [2020-09-14 12:41:33,718 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=272, Invalid=598, Unknown=0, NotChecked=0, Total=870 [2020-09-14 12:41:33,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-09-14 12:41:33,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 166. [2020-09-14 12:41:33,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-14 12:41:33,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-09-14 12:41:33,723 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-09-14 12:41:33,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:41:33,724 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-09-14 12:41:33,724 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:41:33,724 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-09-14 12:41:33,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:41:33,724 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:41:33,724 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:41:33,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2020-09-14 12:41:33,925 INFO L427 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:41:33,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:41:33,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1235157239, now seen corresponding path program 157 times [2020-09-14 12:41:33,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:41:33,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362838723] [2020-09-14 12:41:33,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:41:33,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:41:34,093 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:34,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362838723] [2020-09-14 12:41:34,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388600291] [2020-09-14 12:41:34,094 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:41:34,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:41:34,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:41:34,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:41:34,412 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:41:34,475 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:34,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:41:34,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:41:34,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736645681] [2020-09-14 12:41:34,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:41:34,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:41:34,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:41:34,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:41:34,476 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 17 states. [2020-09-14 12:41:35,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:41:35,609 INFO L93 Difference]: Finished difference Result 258 states and 617 transitions. [2020-09-14 12:41:35,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-14 12:41:35,610 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:41:35,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:41:35,611 INFO L225 Difference]: With dead ends: 258 [2020-09-14 12:41:35,611 INFO L226 Difference]: Without dead ends: 253 [2020-09-14 12:41:35,611 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=371, Invalid=751, Unknown=0, NotChecked=0, Total=1122 [2020-09-14 12:41:35,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-09-14 12:41:35,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 167. [2020-09-14 12:41:35,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-14 12:41:35,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-09-14 12:41:35,615 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-09-14 12:41:35,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:41:35,615 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-09-14 12:41:35,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:41:35,616 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-09-14 12:41:35,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:41:35,616 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:41:35,616 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:41:35,821 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2020-09-14 12:41:35,822 INFO L427 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:41:35,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:41:35,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1235158200, now seen corresponding path program 158 times [2020-09-14 12:41:35,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:41:35,823 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013130910] [2020-09-14 12:41:35,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:41:35,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:41:35,997 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:35,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013130910] [2020-09-14 12:41:35,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002539063] [2020-09-14 12:41:35,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:41:36,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:41:36,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:41:36,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:41:36,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:41:38,503 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:41:38,570 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:38,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:41:38,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:41:38,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830154417] [2020-09-14 12:41:38,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:41:38,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:41:38,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:41:38,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=185, Unknown=1, NotChecked=0, Total=272 [2020-09-14 12:41:38,572 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-09-14 12:41:43,107 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2020-09-14 12:41:47,411 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2020-09-14 12:41:48,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:41:48,378 INFO L93 Difference]: Finished difference Result 287 states and 685 transitions. [2020-09-14 12:41:48,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-14 12:41:48,380 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:41:48,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:41:48,381 INFO L225 Difference]: With dead ends: 287 [2020-09-14 12:41:48,381 INFO L226 Difference]: Without dead ends: 279 [2020-09-14 12:41:48,381 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=370, Invalid=819, Unknown=1, NotChecked=0, Total=1190 [2020-09-14 12:41:48,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-09-14 12:41:48,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 162. [2020-09-14 12:41:48,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-14 12:41:48,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 400 transitions. [2020-09-14 12:41:48,385 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 400 transitions. Word has length 14 [2020-09-14 12:41:48,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:41:48,386 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 400 transitions. [2020-09-14 12:41:48,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:41:48,386 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 400 transitions. [2020-09-14 12:41:48,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:41:48,386 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:41:48,386 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:41:48,590 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable191 [2020-09-14 12:41:48,590 INFO L427 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:41:48,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:41:48,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1235187030, now seen corresponding path program 159 times [2020-09-14 12:41:48,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:41:48,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401259459] [2020-09-14 12:41:48,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:41:48,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:41:48,749 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:48,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401259459] [2020-09-14 12:41:48,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549917405] [2020-09-14 12:41:48,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:41:48,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-14 12:41:48,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:41:48,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:41:48,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:41:49,059 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:41:49,066 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:41:49,116 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:49,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:41:49,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:41:49,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519967288] [2020-09-14 12:41:49,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:41:49,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:41:49,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:41:49,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:41:49,117 INFO L87 Difference]: Start difference. First operand 162 states and 400 transitions. Second operand 17 states. [2020-09-14 12:41:50,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:41:50,151 INFO L93 Difference]: Finished difference Result 260 states and 621 transitions. [2020-09-14 12:41:50,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-14 12:41:50,153 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:41:50,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:41:50,154 INFO L225 Difference]: With dead ends: 260 [2020-09-14 12:41:50,154 INFO L226 Difference]: Without dead ends: 255 [2020-09-14 12:41:50,155 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=338, Invalid=718, Unknown=0, NotChecked=0, Total=1056 [2020-09-14 12:41:50,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-09-14 12:41:50,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 160. [2020-09-14 12:41:50,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-09-14 12:41:50,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 390 transitions. [2020-09-14 12:41:50,158 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 390 transitions. Word has length 14 [2020-09-14 12:41:50,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:41:50,158 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 390 transitions. [2020-09-14 12:41:50,158 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:41:50,158 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 390 transitions. [2020-09-14 12:41:50,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:41:50,158 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:41:50,158 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:41:50,359 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:41:50,359 INFO L427 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:41:50,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:41:50,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1241622630, now seen corresponding path program 160 times [2020-09-14 12:41:50,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:41:50,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425312350] [2020-09-14 12:41:50,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:41:50,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:41:50,510 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:50,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425312350] [2020-09-14 12:41:50,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851654571] [2020-09-14 12:41:50,511 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:41:50,564 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:41:50,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:41:50,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:41:50,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:41:50,871 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:50,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:41:50,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:41:50,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951665840] [2020-09-14 12:41:50,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:41:50,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:41:50,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:41:50,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:41:50,872 INFO L87 Difference]: Start difference. First operand 160 states and 390 transitions. Second operand 17 states. [2020-09-14 12:41:51,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:41:51,503 INFO L93 Difference]: Finished difference Result 235 states and 543 transitions. [2020-09-14 12:41:51,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-14 12:41:51,503 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:41:51,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:41:51,504 INFO L225 Difference]: With dead ends: 235 [2020-09-14 12:41:51,504 INFO L226 Difference]: Without dead ends: 233 [2020-09-14 12:41:51,504 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=193, Invalid=509, Unknown=0, NotChecked=0, Total=702 [2020-09-14 12:41:51,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-09-14 12:41:51,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 163. [2020-09-14 12:41:51,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-14 12:41:51,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 401 transitions. [2020-09-14 12:41:51,508 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 401 transitions. Word has length 14 [2020-09-14 12:41:51,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:41:51,508 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 401 transitions. [2020-09-14 12:41:51,508 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:41:51,508 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 401 transitions. [2020-09-14 12:41:51,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:41:51,508 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:41:51,508 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:41:51,709 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:41:51,710 INFO L427 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:41:51,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:41:51,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1241623591, now seen corresponding path program 161 times [2020-09-14 12:41:51,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:41:51,710 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013504818] [2020-09-14 12:41:51,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:41:51,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:41:51,865 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:51,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013504818] [2020-09-14 12:41:51,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980904026] [2020-09-14 12:41:51,866 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:41:51,922 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:41:51,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:41:51,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:41:51,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:41:56,196 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:56,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:41:56,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:41:56,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279151453] [2020-09-14 12:41:56,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:41:56,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:41:56,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:41:56,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=212, Unknown=1, NotChecked=0, Total=272 [2020-09-14 12:41:56,198 INFO L87 Difference]: Start difference. First operand 163 states and 401 transitions. Second operand 17 states. [2020-09-14 12:42:00,618 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-09-14 12:42:07,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:42:07,127 INFO L93 Difference]: Finished difference Result 241 states and 556 transitions. [2020-09-14 12:42:07,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-14 12:42:07,129 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:42:07,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:42:07,129 INFO L225 Difference]: With dead ends: 241 [2020-09-14 12:42:07,129 INFO L226 Difference]: Without dead ends: 239 [2020-09-14 12:42:07,130 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=193, Invalid=508, Unknown=1, NotChecked=0, Total=702 [2020-09-14 12:42:07,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-09-14 12:42:07,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 163. [2020-09-14 12:42:07,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-14 12:42:07,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 400 transitions. [2020-09-14 12:42:07,138 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 400 transitions. Word has length 14 [2020-09-14 12:42:07,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:42:07,138 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 400 transitions. [2020-09-14 12:42:07,138 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:42:07,138 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 400 transitions. [2020-09-14 12:42:07,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:42:07,138 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:42:07,139 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:42:07,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2020-09-14 12:42:07,339 INFO L427 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:42:07,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:42:07,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1241652421, now seen corresponding path program 162 times [2020-09-14 12:42:07,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:42:07,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242230684] [2020-09-14 12:42:07,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:42:07,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:42:07,507 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:42:07,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242230684] [2020-09-14 12:42:07,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242849443] [2020-09-14 12:42:07,508 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:42:07,563 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-14 12:42:07,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:42:07,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:42:07,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:42:07,900 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:42:07,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:42:07,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:42:07,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451428025] [2020-09-14 12:42:07,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:42:07,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:42:07,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:42:07,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:42:07,902 INFO L87 Difference]: Start difference. First operand 163 states and 400 transitions. Second operand 17 states. [2020-09-14 12:42:08,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:42:08,571 INFO L93 Difference]: Finished difference Result 235 states and 546 transitions. [2020-09-14 12:42:08,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-14 12:42:08,572 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:42:08,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:42:08,573 INFO L225 Difference]: With dead ends: 235 [2020-09-14 12:42:08,573 INFO L226 Difference]: Without dead ends: 233 [2020-09-14 12:42:08,574 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=192, Invalid=510, Unknown=0, NotChecked=0, Total=702 [2020-09-14 12:42:08,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-09-14 12:42:08,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 162. [2020-09-14 12:42:08,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-14 12:42:08,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 397 transitions. [2020-09-14 12:42:08,576 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 397 transitions. Word has length 14 [2020-09-14 12:42:08,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:42:08,577 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 397 transitions. [2020-09-14 12:42:08,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:42:08,577 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 397 transitions. [2020-09-14 12:42:08,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:42:08,577 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:42:08,577 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:42:08,778 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:42:08,778 INFO L427 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:42:08,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:42:08,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1262178420, now seen corresponding path program 163 times [2020-09-14 12:42:08,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:42:08,779 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903667016] [2020-09-14 12:42:08,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:42:08,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:42:08,939 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:42:08,939 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903667016] [2020-09-14 12:42:08,939 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586587724] [2020-09-14 12:42:08,940 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:42:08,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:42:08,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:42:08,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:42:09,290 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:42:09,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:42:09,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:42:09,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411393362] [2020-09-14 12:42:09,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:42:09,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:42:09,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:42:09,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:42:09,292 INFO L87 Difference]: Start difference. First operand 162 states and 397 transitions. Second operand 17 states. [2020-09-14 12:42:10,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:42:10,356 INFO L93 Difference]: Finished difference Result 254 states and 587 transitions. [2020-09-14 12:42:10,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-14 12:42:10,358 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:42:10,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:42:10,358 INFO L225 Difference]: With dead ends: 254 [2020-09-14 12:42:10,358 INFO L226 Difference]: Without dead ends: 252 [2020-09-14 12:42:10,359 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=290, Invalid=702, Unknown=0, NotChecked=0, Total=992 [2020-09-14 12:42:10,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-09-14 12:42:10,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 164. [2020-09-14 12:42:10,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-14 12:42:10,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 405 transitions. [2020-09-14 12:42:10,366 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 405 transitions. Word has length 14 [2020-09-14 12:42:10,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:42:10,366 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 405 transitions. [2020-09-14 12:42:10,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:42:10,366 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 405 transitions. [2020-09-14 12:42:10,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:42:10,366 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:42:10,367 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:42:10,567 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable196 [2020-09-14 12:42:10,567 INFO L427 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:42:10,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:42:10,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1262179381, now seen corresponding path program 164 times [2020-09-14 12:42:10,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:42:10,569 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883564935] [2020-09-14 12:42:10,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:42:10,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:42:10,740 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:42:10,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883564935] [2020-09-14 12:42:10,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500834566] [2020-09-14 12:42:10,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:42:10,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:42:10,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:42:10,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:42:10,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:42:12,099 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:42:12,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:42:12,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:42:12,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469452020] [2020-09-14 12:42:12,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:42:12,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:42:12,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:42:12,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:42:12,101 INFO L87 Difference]: Start difference. First operand 164 states and 405 transitions. Second operand 17 states. [2020-09-14 12:42:16,610 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-09-14 12:42:31,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:42:31,531 INFO L93 Difference]: Finished difference Result 264 states and 610 transitions. [2020-09-14 12:42:31,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-14 12:42:31,532 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:42:31,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:42:31,533 INFO L225 Difference]: With dead ends: 264 [2020-09-14 12:42:31,533 INFO L226 Difference]: Without dead ends: 262 [2020-09-14 12:42:31,533 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=289, Invalid=699, Unknown=4, NotChecked=0, Total=992 [2020-09-14 12:42:31,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-09-14 12:42:31,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 165. [2020-09-14 12:42:31,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-09-14 12:42:31,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 409 transitions. [2020-09-14 12:42:31,536 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 409 transitions. Word has length 14 [2020-09-14 12:42:31,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:42:31,536 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 409 transitions. [2020-09-14 12:42:31,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:42:31,536 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 409 transitions. [2020-09-14 12:42:31,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:42:31,537 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:42:31,537 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:42:31,737 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:42:31,738 INFO L427 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:42:31,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:42:31,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1262841510, now seen corresponding path program 165 times [2020-09-14 12:42:31,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:42:31,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385214503] [2020-09-14 12:42:31,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:42:31,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:42:31,903 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:42:31,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385214503] [2020-09-14 12:42:31,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182116337] [2020-09-14 12:42:31,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:42:31,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-14 12:42:31,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:42:31,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:42:31,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:42:33,389 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:42:33,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:42:33,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:42:33,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216571174] [2020-09-14 12:42:33,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:42:33,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:42:33,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:42:33,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:42:33,391 INFO L87 Difference]: Start difference. First operand 165 states and 409 transitions. Second operand 17 states. [2020-09-14 12:42:34,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:42:34,430 INFO L93 Difference]: Finished difference Result 255 states and 604 transitions. [2020-09-14 12:42:34,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-14 12:42:34,431 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:42:34,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:42:34,432 INFO L225 Difference]: With dead ends: 255 [2020-09-14 12:42:34,432 INFO L226 Difference]: Without dead ends: 253 [2020-09-14 12:42:34,433 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=313, Invalid=679, Unknown=0, NotChecked=0, Total=992 [2020-09-14 12:42:34,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-09-14 12:42:34,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 167. [2020-09-14 12:42:34,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-14 12:42:34,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-09-14 12:42:34,436 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-09-14 12:42:34,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:42:34,436 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-09-14 12:42:34,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:42:34,436 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-09-14 12:42:34,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:42:34,437 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:42:34,437 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:42:34,637 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:42:34,637 INFO L427 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:42:34,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:42:34,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1262862869, now seen corresponding path program 166 times [2020-09-14 12:42:34,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:42:34,638 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384801827] [2020-09-14 12:42:34,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:42:34,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:42:34,799 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:42:34,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384801827] [2020-09-14 12:42:34,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079102826] [2020-09-14 12:42:34,799 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:42:34,852 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:42:34,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:42:34,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:42:34,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:42:35,153 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:42:35,222 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:42:35,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:42:35,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:42:35,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817586435] [2020-09-14 12:42:35,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:42:35,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:42:35,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:42:35,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:42:35,224 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-09-14 12:42:36,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:42:36,569 INFO L93 Difference]: Finished difference Result 256 states and 613 transitions. [2020-09-14 12:42:36,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-14 12:42:36,570 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:42:36,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:42:36,571 INFO L225 Difference]: With dead ends: 256 [2020-09-14 12:42:36,571 INFO L226 Difference]: Without dead ends: 251 [2020-09-14 12:42:36,571 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=408, Invalid=852, Unknown=0, NotChecked=0, Total=1260 [2020-09-14 12:42:36,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-09-14 12:42:36,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 167. [2020-09-14 12:42:36,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-14 12:42:36,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-09-14 12:42:36,575 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-09-14 12:42:36,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:42:36,575 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-09-14 12:42:36,575 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:42:36,575 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-09-14 12:42:36,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:42:36,576 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:42:36,576 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:42:36,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2020-09-14 12:42:36,777 INFO L427 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:42:36,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:42:36,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1262863830, now seen corresponding path program 167 times [2020-09-14 12:42:36,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:42:36,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196819551] [2020-09-14 12:42:36,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:42:36,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:42:36,956 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:42:36,956 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196819551] [2020-09-14 12:42:36,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328232040] [2020-09-14 12:42:36,957 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:42:37,007 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-14 12:42:37,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:42:37,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:42:37,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:42:41,535 WARN L193 SmtUtils]: Spent 997.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-09-14 12:42:41,558 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:42:41,747 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:42:41,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:42:41,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:42:41,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362917288] [2020-09-14 12:42:41,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:42:41,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:42:41,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:42:41,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=185, Unknown=2, NotChecked=0, Total=272 [2020-09-14 12:42:41,749 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-09-14 12:42:42,900 WARN L193 SmtUtils]: Spent 907.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2020-09-14 12:42:45,552 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-09-14 12:42:47,121 WARN L193 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2020-09-14 12:42:50,095 WARN L193 SmtUtils]: Spent 593.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2020-09-14 12:42:52,347 WARN L193 SmtUtils]: Spent 913.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-09-14 12:42:52,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:42:52,912 INFO L93 Difference]: Finished difference Result 279 states and 667 transitions. [2020-09-14 12:42:52,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-14 12:42:52,913 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:42:52,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:42:52,913 INFO L225 Difference]: With dead ends: 279 [2020-09-14 12:42:52,914 INFO L226 Difference]: Without dead ends: 274 [2020-09-14 12:42:52,914 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=409, Invalid=921, Unknown=2, NotChecked=0, Total=1332 [2020-09-14 12:42:52,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-09-14 12:42:52,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 165. [2020-09-14 12:42:52,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-09-14 12:42:52,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 409 transitions. [2020-09-14 12:42:52,917 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 409 transitions. Word has length 14 [2020-09-14 12:42:52,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:42:52,917 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 409 transitions. [2020-09-14 12:42:52,917 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:42:52,917 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 409 transitions. [2020-09-14 12:42:52,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:42:52,918 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:42:52,918 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:42:53,118 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2020-09-14 12:42:53,119 INFO L427 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:42:53,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:42:53,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1262871301, now seen corresponding path program 168 times [2020-09-14 12:42:53,120 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:42:53,120 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072504233] [2020-09-14 12:42:53,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:42:53,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:42:53,299 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:42:53,299 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072504233] [2020-09-14 12:42:53,299 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802285853] [2020-09-14 12:42:53,300 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:42:53,351 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-14 12:42:53,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:42:53,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:42:53,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:42:55,863 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:42:55,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:42:55,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:42:55,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645733385] [2020-09-14 12:42:55,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:42:55,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:42:55,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:42:55,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=196, Unknown=1, NotChecked=0, Total=272 [2020-09-14 12:42:55,865 INFO L87 Difference]: Start difference. First operand 165 states and 409 transitions. Second operand 17 states. [2020-09-14 12:43:00,352 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-09-14 12:43:04,641 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-09-14 12:43:05,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:43:05,501 INFO L93 Difference]: Finished difference Result 271 states and 639 transitions. [2020-09-14 12:43:05,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-14 12:43:05,502 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:43:05,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:43:05,503 INFO L225 Difference]: With dead ends: 271 [2020-09-14 12:43:05,503 INFO L226 Difference]: Without dead ends: 269 [2020-09-14 12:43:05,504 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=348, Invalid=841, Unknown=1, NotChecked=0, Total=1190 [2020-09-14 12:43:05,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-09-14 12:43:05,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 167. [2020-09-14 12:43:05,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-14 12:43:05,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-09-14 12:43:05,508 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-09-14 12:43:05,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:43:05,508 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-09-14 12:43:05,508 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:43:05,508 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-09-14 12:43:05,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:43:05,509 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:43:05,509 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:43:05,719 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2020-09-14 12:43:05,719 INFO L427 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:43:05,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:43:05,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1262892660, now seen corresponding path program 169 times [2020-09-14 12:43:05,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:43:05,721 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727209677] [2020-09-14 12:43:05,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:43:05,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:43:05,903 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:43:05,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727209677] [2020-09-14 12:43:05,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838560674] [2020-09-14 12:43:05,904 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:43:05,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:43:05,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:43:05,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:43:14,764 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:43:14,774 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:43:14,871 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:43:14,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:43:14,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:43:14,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306880802] [2020-09-14 12:43:14,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:43:14,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:43:14,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:43:14,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=181, Unknown=4, NotChecked=0, Total=272 [2020-09-14 12:43:14,873 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-09-14 12:43:19,340 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-09-14 12:43:23,792 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-09-14 12:43:34,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:43:34,305 INFO L93 Difference]: Finished difference Result 299 states and 714 transitions. [2020-09-14 12:43:34,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-14 12:43:34,307 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:43:34,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:43:34,308 INFO L225 Difference]: With dead ends: 299 [2020-09-14 12:43:34,308 INFO L226 Difference]: Without dead ends: 291 [2020-09-14 12:43:34,308 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 20.9s TimeCoverageRelationStatistics Valid=434, Invalid=968, Unknown=4, NotChecked=0, Total=1406 [2020-09-14 12:43:34,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-09-14 12:43:34,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 168. [2020-09-14 12:43:34,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-09-14 12:43:34,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 421 transitions. [2020-09-14 12:43:34,312 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 421 transitions. Word has length 14 [2020-09-14 12:43:34,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:43:34,312 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 421 transitions. [2020-09-14 12:43:34,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:43:34,312 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 421 transitions. [2020-09-14 12:43:34,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:43:34,312 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:43:34,312 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:43:34,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2020-09-14 12:43:34,513 INFO L427 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:43:34,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:43:34,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1262893621, now seen corresponding path program 170 times [2020-09-14 12:43:34,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:43:34,514 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790145225] [2020-09-14 12:43:34,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:43:34,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:43:34,699 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:43:34,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790145225] [2020-09-14 12:43:34,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335971253] [2020-09-14 12:43:34,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:43:34,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:43:34,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:43:34,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:43:34,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:43:37,096 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:43:37,151 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:43:37,151 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:43:37,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:43:37,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201812944] [2020-09-14 12:43:37,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:43:37,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:43:37,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:43:37,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=189, Unknown=1, NotChecked=0, Total=272 [2020-09-14 12:43:37,152 INFO L87 Difference]: Start difference. First operand 168 states and 421 transitions. Second operand 17 states. [2020-09-14 12:43:39,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:43:39,332 INFO L93 Difference]: Finished difference Result 292 states and 701 transitions. [2020-09-14 12:43:39,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-14 12:43:39,333 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:43:39,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:43:39,334 INFO L225 Difference]: With dead ends: 292 [2020-09-14 12:43:39,334 INFO L226 Difference]: Without dead ends: 284 [2020-09-14 12:43:39,334 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=425, Invalid=980, Unknown=1, NotChecked=0, Total=1406 [2020-09-14 12:43:39,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-09-14 12:43:39,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 162. [2020-09-14 12:43:39,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-14 12:43:39,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 403 transitions. [2020-09-14 12:43:39,342 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 403 transitions. Word has length 14 [2020-09-14 12:43:39,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:43:39,342 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 403 transitions. [2020-09-14 12:43:39,343 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:43:39,343 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 403 transitions. [2020-09-14 12:43:39,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:43:39,343 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:43:39,343 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:43:39,544 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2020-09-14 12:43:39,544 INFO L427 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:43:39,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:43:39,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1263101941, now seen corresponding path program 171 times [2020-09-14 12:43:39,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:43:39,545 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066337574] [2020-09-14 12:43:39,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:43:39,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:43:39,715 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:43:39,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066337574] [2020-09-14 12:43:39,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679067636] [2020-09-14 12:43:39,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:43:39,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-14 12:43:39,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:43:39,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:43:39,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:43:40,154 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:43:40,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:43:40,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:43:40,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668867585] [2020-09-14 12:43:40,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:43:40,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:43:40,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:43:40,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:43:40,156 INFO L87 Difference]: Start difference. First operand 162 states and 403 transitions. Second operand 17 states. [2020-09-14 12:43:40,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:43:40,942 INFO L93 Difference]: Finished difference Result 231 states and 545 transitions. [2020-09-14 12:43:40,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-14 12:43:40,944 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:43:40,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:43:40,945 INFO L225 Difference]: With dead ends: 231 [2020-09-14 12:43:40,945 INFO L226 Difference]: Without dead ends: 229 [2020-09-14 12:43:40,946 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=202, Invalid=500, Unknown=0, NotChecked=0, Total=702 [2020-09-14 12:43:40,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-09-14 12:43:40,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 162. [2020-09-14 12:43:40,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-14 12:43:40,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 403 transitions. [2020-09-14 12:43:40,950 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 403 transitions. Word has length 14 [2020-09-14 12:43:40,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:43:40,950 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 403 transitions. [2020-09-14 12:43:40,950 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:43:40,950 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 403 transitions. [2020-09-14 12:43:40,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:43:40,951 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:43:40,951 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:43:41,162 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2020-09-14 12:43:41,162 INFO L427 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:43:41,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:43:41,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1263765031, now seen corresponding path program 172 times [2020-09-14 12:43:41,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:43:41,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141156398] [2020-09-14 12:43:41,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:43:41,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:43:41,347 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:43:41,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141156398] [2020-09-14 12:43:41,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640338218] [2020-09-14 12:43:41,348 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:43:41,399 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:43:41,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:43:41,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:43:41,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:43:41,786 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:43:41,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:43:41,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:43:41,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584215128] [2020-09-14 12:43:41,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:43:41,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:43:41,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:43:41,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:43:41,787 INFO L87 Difference]: Start difference. First operand 162 states and 403 transitions. Second operand 17 states. [2020-09-14 12:43:42,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:43:42,956 INFO L93 Difference]: Finished difference Result 250 states and 594 transitions. [2020-09-14 12:43:42,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-14 12:43:42,958 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:43:42,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:43:42,958 INFO L225 Difference]: With dead ends: 250 [2020-09-14 12:43:42,959 INFO L226 Difference]: Without dead ends: 248 [2020-09-14 12:43:42,959 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=300, Invalid=692, Unknown=0, NotChecked=0, Total=992 [2020-09-14 12:43:42,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-09-14 12:43:42,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 163. [2020-09-14 12:43:42,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-14 12:43:42,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 405 transitions. [2020-09-14 12:43:42,962 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 405 transitions. Word has length 14 [2020-09-14 12:43:42,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:43:42,963 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 405 transitions. [2020-09-14 12:43:42,963 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:43:42,963 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 405 transitions. [2020-09-14 12:43:42,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:43:42,963 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:43:42,963 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:43:43,164 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:43:43,164 INFO L427 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:43:43,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:43:43,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1263787351, now seen corresponding path program 173 times [2020-09-14 12:43:43,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:43:43,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539155304] [2020-09-14 12:43:43,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:43:43,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:43:43,348 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:43:43,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539155304] [2020-09-14 12:43:43,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417853832] [2020-09-14 12:43:43,349 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:43:43,401 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-14 12:43:43,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:43:43,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:43:43,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:43:43,737 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:43:43,776 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:43:43,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:43:43,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:43:43,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484492411] [2020-09-14 12:43:43,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:43:43,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:43:43,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:43:43,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:43:43,777 INFO L87 Difference]: Start difference. First operand 163 states and 405 transitions. Second operand 17 states. [2020-09-14 12:43:45,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:43:45,622 INFO L93 Difference]: Finished difference Result 288 states and 686 transitions. [2020-09-14 12:43:45,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-14 12:43:45,624 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:43:45,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:43:45,625 INFO L225 Difference]: With dead ends: 288 [2020-09-14 12:43:45,625 INFO L226 Difference]: Without dead ends: 283 [2020-09-14 12:43:45,626 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=426, Invalid=980, Unknown=0, NotChecked=0, Total=1406 [2020-09-14 12:43:45,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-09-14 12:43:45,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 159. [2020-09-14 12:43:45,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-09-14 12:43:45,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 388 transitions. [2020-09-14 12:43:45,629 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 388 transitions. Word has length 14 [2020-09-14 12:43:45,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:43:45,629 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 388 transitions. [2020-09-14 12:43:45,629 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:43:45,629 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 388 transitions. [2020-09-14 12:43:45,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:43:45,630 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:43:45,630 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:43:45,830 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2020-09-14 12:43:45,831 INFO L427 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:43:45,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:43:45,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1463267670, now seen corresponding path program 174 times [2020-09-14 12:43:45,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:43:45,832 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630870907] [2020-09-14 12:43:45,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:43:45,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:43:46,007 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:43:46,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630870907] [2020-09-14 12:43:46,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173641441] [2020-09-14 12:43:46,008 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:43:46,065 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-14 12:43:46,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:43:46,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:43:46,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:43:46,358 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:43:46,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:43:46,359 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:43:46,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531824971] [2020-09-14 12:43:46,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:43:46,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:43:46,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:43:46,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:43:46,360 INFO L87 Difference]: Start difference. First operand 159 states and 388 transitions. Second operand 17 states. [2020-09-14 12:43:47,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:43:47,091 INFO L93 Difference]: Finished difference Result 236 states and 544 transitions. [2020-09-14 12:43:47,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-14 12:43:47,093 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:43:47,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:43:47,094 INFO L225 Difference]: With dead ends: 236 [2020-09-14 12:43:47,094 INFO L226 Difference]: Without dead ends: 234 [2020-09-14 12:43:47,094 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=212, Invalid=544, Unknown=0, NotChecked=0, Total=756 [2020-09-14 12:43:47,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-09-14 12:43:47,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 163. [2020-09-14 12:43:47,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-14 12:43:47,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 402 transitions. [2020-09-14 12:43:47,097 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 402 transitions. Word has length 14 [2020-09-14 12:43:47,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:43:47,098 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 402 transitions. [2020-09-14 12:43:47,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:43:47,098 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 402 transitions. [2020-09-14 12:43:47,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:43:47,098 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:43:47,098 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:43:47,299 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:43:47,299 INFO L427 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:43:47,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:43:47,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1463268631, now seen corresponding path program 175 times [2020-09-14 12:43:47,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:43:47,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599365296] [2020-09-14 12:43:47,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:43:47,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:43:47,483 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:43:47,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599365296] [2020-09-14 12:43:47,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410899285] [2020-09-14 12:43:47,484 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:43:47,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:43:47,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:43:47,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:43:47,860 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:43:47,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:43:47,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:43:47,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378218224] [2020-09-14 12:43:47,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:43:47,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:43:47,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:43:47,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:43:47,862 INFO L87 Difference]: Start difference. First operand 163 states and 402 transitions. Second operand 17 states. [2020-09-14 12:43:48,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:43:48,592 INFO L93 Difference]: Finished difference Result 246 states and 565 transitions. [2020-09-14 12:43:48,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-14 12:43:48,594 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:43:48,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:43:48,594 INFO L225 Difference]: With dead ends: 246 [2020-09-14 12:43:48,594 INFO L226 Difference]: Without dead ends: 244 [2020-09-14 12:43:48,594 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2020-09-14 12:43:48,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-09-14 12:43:48,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 163. [2020-09-14 12:43:48,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-14 12:43:48,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 402 transitions. [2020-09-14 12:43:48,597 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 402 transitions. Word has length 14 [2020-09-14 12:43:48,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:43:48,597 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 402 transitions. [2020-09-14 12:43:48,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:43:48,597 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 402 transitions. [2020-09-14 12:43:48,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:43:48,598 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:43:48,598 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:43:48,798 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:43:48,799 INFO L427 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:43:48,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:43:48,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1463297461, now seen corresponding path program 176 times [2020-09-14 12:43:48,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:43:48,800 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870976680] [2020-09-14 12:43:48,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:43:48,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:43:48,976 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:43:48,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870976680] [2020-09-14 12:43:48,977 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116891631] [2020-09-14 12:43:48,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:43:49,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:43:49,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:43:49,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:43:49,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:43:49,356 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:43:49,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:43:49,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:43:49,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931113795] [2020-09-14 12:43:49,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:43:49,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:43:49,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:43:49,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:43:49,364 INFO L87 Difference]: Start difference. First operand 163 states and 402 transitions. Second operand 17 states. [2020-09-14 12:43:50,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:43:50,036 INFO L93 Difference]: Finished difference Result 239 states and 554 transitions. [2020-09-14 12:43:50,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-14 12:43:50,037 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:43:50,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:43:50,038 INFO L225 Difference]: With dead ends: 239 [2020-09-14 12:43:50,038 INFO L226 Difference]: Without dead ends: 237 [2020-09-14 12:43:50,039 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2020-09-14 12:43:50,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-09-14 12:43:50,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 163. [2020-09-14 12:43:50,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-14 12:43:50,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 402 transitions. [2020-09-14 12:43:50,042 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 402 transitions. Word has length 14 [2020-09-14 12:43:50,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:43:50,042 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 402 transitions. [2020-09-14 12:43:50,042 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:43:50,042 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 402 transitions. [2020-09-14 12:43:50,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:43:50,043 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:43:50,043 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:43:50,243 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:43:50,244 INFO L427 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:43:50,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:43:50,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1464221943, now seen corresponding path program 177 times [2020-09-14 12:43:50,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:43:50,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157376205] [2020-09-14 12:43:50,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:43:50,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:43:50,415 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:43:50,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157376205] [2020-09-14 12:43:50,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699428928] [2020-09-14 12:43:50,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:43:50,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-14 12:43:50,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:43:50,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:43:50,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:43:50,776 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:43:50,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:43:50,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:43:50,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065570426] [2020-09-14 12:43:50,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:43:50,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:43:50,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:43:50,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:43:50,778 INFO L87 Difference]: Start difference. First operand 163 states and 402 transitions. Second operand 17 states. [2020-09-14 12:43:51,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:43:51,357 INFO L93 Difference]: Finished difference Result 229 states and 529 transitions. [2020-09-14 12:43:51,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-14 12:43:51,359 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:43:51,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:43:51,360 INFO L225 Difference]: With dead ends: 229 [2020-09-14 12:43:51,360 INFO L226 Difference]: Without dead ends: 227 [2020-09-14 12:43:51,360 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2020-09-14 12:43:51,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-09-14 12:43:51,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 161. [2020-09-14 12:43:51,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-09-14 12:43:51,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 395 transitions. [2020-09-14 12:43:51,364 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 395 transitions. Word has length 14 [2020-09-14 12:43:51,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:43:51,364 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 395 transitions. [2020-09-14 12:43:51,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:43:51,364 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 395 transitions. [2020-09-14 12:43:51,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:43:51,364 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:43:51,365 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:43:51,565 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2020-09-14 12:43:51,565 INFO L427 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:43:51,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:43:51,566 INFO L82 PathProgramCache]: Analyzing trace with hash 2100497160, now seen corresponding path program 178 times [2020-09-14 12:43:51,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:43:51,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136254365] [2020-09-14 12:43:51,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:43:51,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:43:51,766 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:43:51,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136254365] [2020-09-14 12:43:51,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840787775] [2020-09-14 12:43:51,767 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:43:51,820 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:43:51,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:43:51,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:43:51,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:43:52,126 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:43:52,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:43:52,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:43:52,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744723234] [2020-09-14 12:43:52,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:43:52,133 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:43:52,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:43:52,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:43:52,133 INFO L87 Difference]: Start difference. First operand 161 states and 395 transitions. Second operand 17 states. [2020-09-14 12:43:53,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:43:53,242 INFO L93 Difference]: Finished difference Result 261 states and 599 transitions. [2020-09-14 12:43:53,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-14 12:43:53,244 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:43:53,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:43:53,245 INFO L225 Difference]: With dead ends: 261 [2020-09-14 12:43:53,245 INFO L226 Difference]: Without dead ends: 259 [2020-09-14 12:43:53,245 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=353, Invalid=907, Unknown=0, NotChecked=0, Total=1260 [2020-09-14 12:43:53,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-09-14 12:43:53,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 164. [2020-09-14 12:43:53,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-14 12:43:53,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 406 transitions. [2020-09-14 12:43:53,248 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 406 transitions. Word has length 14 [2020-09-14 12:43:53,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:43:53,249 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 406 transitions. [2020-09-14 12:43:53,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:43:53,249 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 406 transitions. [2020-09-14 12:43:53,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:43:53,249 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:43:53,249 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:43:53,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:43:53,450 INFO L427 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:43:53,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:43:53,451 INFO L82 PathProgramCache]: Analyzing trace with hash 2100498121, now seen corresponding path program 179 times [2020-09-14 12:43:53,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:43:53,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233496885] [2020-09-14 12:43:53,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:43:53,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:43:53,649 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:43:53,649 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233496885] [2020-09-14 12:43:53,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272121683] [2020-09-14 12:43:53,650 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:43:53,704 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:43:53,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:43:53,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:43:53,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:43:54,046 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:43:54,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:43:54,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:43:54,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821289211] [2020-09-14 12:43:54,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:43:54,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:43:54,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:43:54,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:43:54,048 INFO L87 Difference]: Start difference. First operand 164 states and 406 transitions. Second operand 17 states. [2020-09-14 12:43:55,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:43:55,158 INFO L93 Difference]: Finished difference Result 271 states and 622 transitions. [2020-09-14 12:43:55,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-14 12:43:55,160 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:43:55,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:43:55,161 INFO L225 Difference]: With dead ends: 271 [2020-09-14 12:43:55,161 INFO L226 Difference]: Without dead ends: 269 [2020-09-14 12:43:55,161 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=296, Invalid=760, Unknown=0, NotChecked=0, Total=1056 [2020-09-14 12:43:55,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-09-14 12:43:55,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 166. [2020-09-14 12:43:55,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-14 12:43:55,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 413 transitions. [2020-09-14 12:43:55,165 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 413 transitions. Word has length 14 [2020-09-14 12:43:55,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:43:55,165 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 413 transitions. [2020-09-14 12:43:55,165 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:43:55,165 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 413 transitions. [2020-09-14 12:43:55,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:43:55,166 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:43:55,166 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:43:55,375 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2020-09-14 12:43:55,375 INFO L427 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:43:55,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:43:55,376 INFO L82 PathProgramCache]: Analyzing trace with hash 2100526951, now seen corresponding path program 180 times [2020-09-14 12:43:55,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:43:55,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574914506] [2020-09-14 12:43:55,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:43:55,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:43:55,552 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:43:55,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574914506] [2020-09-14 12:43:55,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064153067] [2020-09-14 12:43:55,553 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:43:55,604 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-14 12:43:55,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:43:55,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:43:55,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:43:55,910 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:43:55,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:43:55,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:43:55,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417504010] [2020-09-14 12:43:55,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:43:55,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:43:55,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:43:55,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:43:55,912 INFO L87 Difference]: Start difference. First operand 166 states and 413 transitions. Second operand 17 states. [2020-09-14 12:43:56,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:43:56,911 INFO L93 Difference]: Finished difference Result 253 states and 588 transitions. [2020-09-14 12:43:56,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-14 12:43:56,913 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:43:56,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:43:56,914 INFO L225 Difference]: With dead ends: 253 [2020-09-14 12:43:56,914 INFO L226 Difference]: Without dead ends: 251 [2020-09-14 12:43:56,915 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=274, Invalid=718, Unknown=0, NotChecked=0, Total=992 [2020-09-14 12:43:56,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-09-14 12:43:56,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 165. [2020-09-14 12:43:56,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-09-14 12:43:56,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 410 transitions. [2020-09-14 12:43:56,918 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 410 transitions. Word has length 14 [2020-09-14 12:43:56,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:43:56,918 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 410 transitions. [2020-09-14 12:43:56,918 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:43:56,919 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 410 transitions. [2020-09-14 12:43:56,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:43:56,919 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:43:56,919 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:43:57,119 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2020-09-14 12:43:57,120 INFO L427 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:43:57,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:43:57,120 INFO L82 PathProgramCache]: Analyzing trace with hash 2121052950, now seen corresponding path program 181 times [2020-09-14 12:43:57,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:43:57,121 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872272230] [2020-09-14 12:43:57,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:43:57,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:43:57,321 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:43:57,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872272230] [2020-09-14 12:43:57,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008875800] [2020-09-14 12:43:57,322 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:43:57,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:43:57,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:43:57,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:43:57,693 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:43:57,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:43:57,693 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:43:57,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355001201] [2020-09-14 12:43:57,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:43:57,694 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:43:57,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:43:57,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:43:57,695 INFO L87 Difference]: Start difference. First operand 165 states and 410 transitions. Second operand 17 states. [2020-09-14 12:43:59,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:43:59,067 INFO L93 Difference]: Finished difference Result 268 states and 622 transitions. [2020-09-14 12:43:59,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-14 12:43:59,070 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:43:59,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:43:59,071 INFO L225 Difference]: With dead ends: 268 [2020-09-14 12:43:59,071 INFO L226 Difference]: Without dead ends: 266 [2020-09-14 12:43:59,071 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=395, Invalid=937, Unknown=0, NotChecked=0, Total=1332 [2020-09-14 12:43:59,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-09-14 12:43:59,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 167. [2020-09-14 12:43:59,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-14 12:43:59,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 418 transitions. [2020-09-14 12:43:59,079 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 418 transitions. Word has length 14 [2020-09-14 12:43:59,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:43:59,079 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 418 transitions. [2020-09-14 12:43:59,079 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:43:59,079 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 418 transitions. [2020-09-14 12:43:59,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:43:59,080 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:43:59,080 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:43:59,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:43:59,281 INFO L427 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:43:59,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:43:59,281 INFO L82 PathProgramCache]: Analyzing trace with hash 2121053911, now seen corresponding path program 182 times [2020-09-14 12:43:59,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:43:59,282 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677094647] [2020-09-14 12:43:59,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:43:59,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:43:59,477 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:43:59,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677094647] [2020-09-14 12:43:59,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216293851] [2020-09-14 12:43:59,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:43:59,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:43:59,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:43:59,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:43:59,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:43:59,859 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:43:59,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:43:59,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:43:59,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102235130] [2020-09-14 12:43:59,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:43:59,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:43:59,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:43:59,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:43:59,861 INFO L87 Difference]: Start difference. First operand 167 states and 418 transitions. Second operand 17 states. [2020-09-14 12:44:01,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:44:01,204 INFO L93 Difference]: Finished difference Result 271 states and 630 transitions. [2020-09-14 12:44:01,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-14 12:44:01,205 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:44:01,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:44:01,206 INFO L225 Difference]: With dead ends: 271 [2020-09-14 12:44:01,206 INFO L226 Difference]: Without dead ends: 269 [2020-09-14 12:44:01,207 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=361, Invalid=899, Unknown=0, NotChecked=0, Total=1260 [2020-09-14 12:44:01,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-09-14 12:44:01,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 169. [2020-09-14 12:44:01,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-14 12:44:01,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 424 transitions. [2020-09-14 12:44:01,210 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 424 transitions. Word has length 14 [2020-09-14 12:44:01,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:44:01,211 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 424 transitions. [2020-09-14 12:44:01,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:44:01,211 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 424 transitions. [2020-09-14 12:44:01,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:44:01,211 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:44:01,211 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:44:01,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2020-09-14 12:44:01,412 INFO L427 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:44:01,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:44:01,413 INFO L82 PathProgramCache]: Analyzing trace with hash 2121716040, now seen corresponding path program 183 times [2020-09-14 12:44:01,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:44:01,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924165085] [2020-09-14 12:44:01,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:44:01,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:44:01,592 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:44:01,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924165085] [2020-09-14 12:44:01,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966360244] [2020-09-14 12:44:01,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:44:01,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-14 12:44:01,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:44:01,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:44:01,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:44:01,975 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:44:01,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:44:01,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:44:01,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650175705] [2020-09-14 12:44:01,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:44:01,978 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:44:01,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:44:01,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:44:01,979 INFO L87 Difference]: Start difference. First operand 169 states and 424 transitions. Second operand 17 states. [2020-09-14 12:44:03,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:44:03,368 INFO L93 Difference]: Finished difference Result 262 states and 620 transitions. [2020-09-14 12:44:03,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-14 12:44:03,370 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:44:03,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:44:03,371 INFO L225 Difference]: With dead ends: 262 [2020-09-14 12:44:03,371 INFO L226 Difference]: Without dead ends: 260 [2020-09-14 12:44:03,372 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=408, Invalid=924, Unknown=0, NotChecked=0, Total=1332 [2020-09-14 12:44:03,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-09-14 12:44:03,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 171. [2020-09-14 12:44:03,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-09-14 12:44:03,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 431 transitions. [2020-09-14 12:44:03,375 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 431 transitions. Word has length 14 [2020-09-14 12:44:03,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:44:03,375 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 431 transitions. [2020-09-14 12:44:03,375 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:44:03,376 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 431 transitions. [2020-09-14 12:44:03,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:44:03,376 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:44:03,376 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:44:03,577 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2020-09-14 12:44:03,577 INFO L427 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:44:03,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:44:03,578 INFO L82 PathProgramCache]: Analyzing trace with hash 2121737399, now seen corresponding path program 184 times [2020-09-14 12:44:03,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:44:03,578 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277896412] [2020-09-14 12:44:03,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:44:03,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:44:03,775 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:44:03,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277896412] [2020-09-14 12:44:03,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931809742] [2020-09-14 12:44:03,776 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:44:03,832 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:44:03,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:44:03,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:44:03,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:44:04,093 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:44:04,115 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:44:04,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:44:04,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:44:04,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640647253] [2020-09-14 12:44:04,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:44:04,116 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:44:04,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:44:04,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:44:04,116 INFO L87 Difference]: Start difference. First operand 171 states and 431 transitions. Second operand 17 states. [2020-09-14 12:44:05,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:44:05,400 INFO L93 Difference]: Finished difference Result 248 states and 600 transitions. [2020-09-14 12:44:05,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-14 12:44:05,403 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:44:05,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:44:05,404 INFO L225 Difference]: With dead ends: 248 [2020-09-14 12:44:05,404 INFO L226 Difference]: Without dead ends: 243 [2020-09-14 12:44:05,404 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=451, Invalid=955, Unknown=0, NotChecked=0, Total=1406 [2020-09-14 12:44:05,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-09-14 12:44:05,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 171. [2020-09-14 12:44:05,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-09-14 12:44:05,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 431 transitions. [2020-09-14 12:44:05,407 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 431 transitions. Word has length 14 [2020-09-14 12:44:05,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:44:05,407 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 431 transitions. [2020-09-14 12:44:05,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:44:05,407 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 431 transitions. [2020-09-14 12:44:05,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:44:05,408 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:44:05,408 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:44:05,608 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:44:05,609 INFO L427 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:44:05,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:44:05,609 INFO L82 PathProgramCache]: Analyzing trace with hash 2121738360, now seen corresponding path program 185 times [2020-09-14 12:44:05,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:44:05,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006358405] [2020-09-14 12:44:05,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:44:05,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:44:05,848 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:44:05,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006358405] [2020-09-14 12:44:05,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078239479] [2020-09-14 12:44:05,849 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:44:05,924 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-14 12:44:05,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:44:05,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:44:05,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:44:06,189 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:44:06,256 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:44:06,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:44:06,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:44:06,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178826812] [2020-09-14 12:44:06,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:44:06,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:44:06,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:44:06,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:44:06,257 INFO L87 Difference]: Start difference. First operand 171 states and 431 transitions. Second operand 17 states. [2020-09-14 12:44:07,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:44:07,941 INFO L93 Difference]: Finished difference Result 287 states and 694 transitions. [2020-09-14 12:44:07,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-14 12:44:07,943 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:44:07,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:44:07,943 INFO L225 Difference]: With dead ends: 287 [2020-09-14 12:44:07,943 INFO L226 Difference]: Without dead ends: 282 [2020-09-14 12:44:07,944 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=487, Invalid=1153, Unknown=0, NotChecked=0, Total=1640 [2020-09-14 12:44:07,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-09-14 12:44:07,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 169. [2020-09-14 12:44:07,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-14 12:44:07,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 424 transitions. [2020-09-14 12:44:07,946 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 424 transitions. Word has length 14 [2020-09-14 12:44:07,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:44:07,947 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 424 transitions. [2020-09-14 12:44:07,947 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:44:07,947 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 424 transitions. [2020-09-14 12:44:07,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:44:07,947 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:44:07,947 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:44:08,148 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:44:08,148 INFO L427 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:44:08,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:44:08,149 INFO L82 PathProgramCache]: Analyzing trace with hash 2121745831, now seen corresponding path program 186 times [2020-09-14 12:44:08,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:44:08,149 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439131469] [2020-09-14 12:44:08,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:44:08,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:44:08,327 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:44:08,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439131469] [2020-09-14 12:44:08,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578212819] [2020-09-14 12:44:08,327 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:44:08,385 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-14 12:44:08,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:44:08,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:44:08,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:44:08,745 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:44:08,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:44:08,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:44:08,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358417500] [2020-09-14 12:44:08,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:44:08,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:44:08,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:44:08,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:44:08,747 INFO L87 Difference]: Start difference. First operand 169 states and 424 transitions. Second operand 17 states. [2020-09-14 12:44:10,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:44:10,225 INFO L93 Difference]: Finished difference Result 284 states and 678 transitions. [2020-09-14 12:44:10,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-14 12:44:10,227 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:44:10,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:44:10,228 INFO L225 Difference]: With dead ends: 284 [2020-09-14 12:44:10,228 INFO L226 Difference]: Without dead ends: 282 [2020-09-14 12:44:10,228 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=423, Invalid=1059, Unknown=0, NotChecked=0, Total=1482 [2020-09-14 12:44:10,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-09-14 12:44:10,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 171. [2020-09-14 12:44:10,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-09-14 12:44:10,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 431 transitions. [2020-09-14 12:44:10,231 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 431 transitions. Word has length 14 [2020-09-14 12:44:10,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:44:10,232 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 431 transitions. [2020-09-14 12:44:10,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:44:10,232 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 431 transitions. [2020-09-14 12:44:10,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:44:10,232 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:44:10,232 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:44:10,433 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:44:10,433 INFO L427 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:44:10,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:44:10,434 INFO L82 PathProgramCache]: Analyzing trace with hash 2121767190, now seen corresponding path program 187 times [2020-09-14 12:44:10,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:44:10,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954291380] [2020-09-14 12:44:10,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:44:10,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:44:10,663 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:44:10,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954291380] [2020-09-14 12:44:10,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652183362] [2020-09-14 12:44:10,663 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:44:10,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:44:10,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:44:10,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:44:11,019 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:44:11,099 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:44:11,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:44:11,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:44:11,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148214122] [2020-09-14 12:44:11,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:44:11,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:44:11,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:44:11,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:44:11,100 INFO L87 Difference]: Start difference. First operand 171 states and 431 transitions. Second operand 17 states. [2020-09-14 12:44:12,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:44:12,834 INFO L93 Difference]: Finished difference Result 289 states and 702 transitions. [2020-09-14 12:44:12,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-14 12:44:12,836 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:44:12,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:44:12,837 INFO L225 Difference]: With dead ends: 289 [2020-09-14 12:44:12,837 INFO L226 Difference]: Without dead ends: 284 [2020-09-14 12:44:12,838 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=481, Invalid=1079, Unknown=0, NotChecked=0, Total=1560 [2020-09-14 12:44:12,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-09-14 12:44:12,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 172. [2020-09-14 12:44:12,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-09-14 12:44:12,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 436 transitions. [2020-09-14 12:44:12,841 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 436 transitions. Word has length 14 [2020-09-14 12:44:12,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:44:12,841 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 436 transitions. [2020-09-14 12:44:12,841 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:44:12,841 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 436 transitions. [2020-09-14 12:44:12,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:44:12,842 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:44:12,842 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:44:13,042 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:44:13,043 INFO L427 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:44:13,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:44:13,043 INFO L82 PathProgramCache]: Analyzing trace with hash 2121768151, now seen corresponding path program 188 times [2020-09-14 12:44:13,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:44:13,044 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650797510] [2020-09-14 12:44:13,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:44:13,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:44:13,237 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:44:13,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650797510] [2020-09-14 12:44:13,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334563973] [2020-09-14 12:44:13,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:44:13,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:44:13,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:44:13,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:44:13,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:44:13,543 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:44:13,573 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:44:13,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:44:13,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:44:13,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141600224] [2020-09-14 12:44:13,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:44:13,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:44:13,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:44:13,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:44:13,575 INFO L87 Difference]: Start difference. First operand 172 states and 436 transitions. Second operand 17 states. [2020-09-14 12:44:15,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:44:15,676 INFO L93 Difference]: Finished difference Result 312 states and 753 transitions. [2020-09-14 12:44:15,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-14 12:44:15,678 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:44:15,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:44:15,679 INFO L225 Difference]: With dead ends: 312 [2020-09-14 12:44:15,679 INFO L226 Difference]: Without dead ends: 304 [2020-09-14 12:44:15,680 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=543, Invalid=1349, Unknown=0, NotChecked=0, Total=1892 [2020-09-14 12:44:15,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-09-14 12:44:15,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 165. [2020-09-14 12:44:15,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-09-14 12:44:15,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 410 transitions. [2020-09-14 12:44:15,683 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 410 transitions. Word has length 14 [2020-09-14 12:44:15,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:44:15,683 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 410 transitions. [2020-09-14 12:44:15,683 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:44:15,683 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 410 transitions. [2020-09-14 12:44:15,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:44:15,684 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:44:15,684 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:44:15,884 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:44:15,885 INFO L427 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:44:15,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:44:15,885 INFO L82 PathProgramCache]: Analyzing trace with hash 2121976471, now seen corresponding path program 189 times [2020-09-14 12:44:15,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:44:15,886 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006376042] [2020-09-14 12:44:15,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:44:15,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:44:16,073 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:44:16,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006376042] [2020-09-14 12:44:16,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283132265] [2020-09-14 12:44:16,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:44:16,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-14 12:44:16,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:44:16,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:44:16,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:44:16,403 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:44:16,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:44:16,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:44:16,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489335035] [2020-09-14 12:44:16,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:44:16,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:44:16,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:44:16,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:44:16,404 INFO L87 Difference]: Start difference. First operand 165 states and 410 transitions. Second operand 17 states. [2020-09-14 12:44:17,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:44:17,608 INFO L93 Difference]: Finished difference Result 262 states and 617 transitions. [2020-09-14 12:44:17,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-14 12:44:17,610 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:44:17,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:44:17,611 INFO L225 Difference]: With dead ends: 262 [2020-09-14 12:44:17,611 INFO L226 Difference]: Without dead ends: 260 [2020-09-14 12:44:17,612 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=314, Invalid=808, Unknown=0, NotChecked=0, Total=1122 [2020-09-14 12:44:17,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-09-14 12:44:17,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 167. [2020-09-14 12:44:17,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-14 12:44:17,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 419 transitions. [2020-09-14 12:44:17,615 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 419 transitions. Word has length 14 [2020-09-14 12:44:17,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:44:17,615 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 419 transitions. [2020-09-14 12:44:17,616 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:44:17,616 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 419 transitions. [2020-09-14 12:44:17,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:44:17,616 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:44:17,616 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:44:17,824 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2020-09-14 12:44:17,824 INFO L427 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:44:17,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:44:17,825 INFO L82 PathProgramCache]: Analyzing trace with hash 2122639561, now seen corresponding path program 190 times [2020-09-14 12:44:17,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:44:17,826 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852893620] [2020-09-14 12:44:17,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:44:17,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:44:18,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:44:18,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852893620] [2020-09-14 12:44:18,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655971214] [2020-09-14 12:44:18,022 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:44:18,075 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:44:18,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:44:18,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:44:18,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:44:18,373 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:44:18,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:44:18,374 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:44:18,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963856886] [2020-09-14 12:44:18,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:44:18,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:44:18,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:44:18,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:44:18,375 INFO L87 Difference]: Start difference. First operand 167 states and 419 transitions. Second operand 17 states. [2020-09-14 12:44:19,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:44:19,793 INFO L93 Difference]: Finished difference Result 271 states and 650 transitions. [2020-09-14 12:44:19,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-14 12:44:19,795 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:44:19,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:44:19,796 INFO L225 Difference]: With dead ends: 271 [2020-09-14 12:44:19,796 INFO L226 Difference]: Without dead ends: 269 [2020-09-14 12:44:19,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=396, Invalid=936, Unknown=0, NotChecked=0, Total=1332 [2020-09-14 12:44:19,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-09-14 12:44:19,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 169. [2020-09-14 12:44:19,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-14 12:44:19,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 426 transitions. [2020-09-14 12:44:19,800 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 426 transitions. Word has length 14 [2020-09-14 12:44:19,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:44:19,800 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 426 transitions. [2020-09-14 12:44:19,800 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:44:19,800 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 426 transitions. [2020-09-14 12:44:19,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:44:19,801 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:44:19,801 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:44:20,001 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2020-09-14 12:44:20,002 INFO L427 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:44:20,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:44:20,002 INFO L82 PathProgramCache]: Analyzing trace with hash 2122660920, now seen corresponding path program 191 times [2020-09-14 12:44:20,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:44:20,003 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584537371] [2020-09-14 12:44:20,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:44:20,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:44:20,197 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:44:20,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584537371] [2020-09-14 12:44:20,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508978432] [2020-09-14 12:44:20,198 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:44:20,247 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-14 12:44:20,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:44:20,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:44:20,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:44:20,492 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:44:20,511 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:44:20,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:44:20,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:44:20,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168427068] [2020-09-14 12:44:20,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:44:20,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:44:20,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:44:20,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:44:20,513 INFO L87 Difference]: Start difference. First operand 169 states and 426 transitions. Second operand 17 states. [2020-09-14 12:44:22,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:44:22,247 INFO L93 Difference]: Finished difference Result 296 states and 714 transitions. [2020-09-14 12:44:22,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-14 12:44:22,249 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:44:22,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:44:22,250 INFO L225 Difference]: With dead ends: 296 [2020-09-14 12:44:22,250 INFO L226 Difference]: Without dead ends: 288 [2020-09-14 12:44:22,251 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=559, Invalid=1333, Unknown=0, NotChecked=0, Total=1892 [2020-09-14 12:44:22,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2020-09-14 12:44:22,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 171. [2020-09-14 12:44:22,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-09-14 12:44:22,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 436 transitions. [2020-09-14 12:44:22,255 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 436 transitions. Word has length 14 [2020-09-14 12:44:22,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:44:22,255 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 436 transitions. [2020-09-14 12:44:22,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:44:22,255 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 436 transitions. [2020-09-14 12:44:22,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:44:22,255 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:44:22,255 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:44:22,456 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2020-09-14 12:44:22,456 INFO L427 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:44:22,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:44:22,457 INFO L82 PathProgramCache]: Analyzing trace with hash 2122661881, now seen corresponding path program 192 times [2020-09-14 12:44:22,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:44:22,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902153672] [2020-09-14 12:44:22,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:44:22,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:44:22,664 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:44:22,664 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902153672] [2020-09-14 12:44:22,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342432426] [2020-09-14 12:44:22,665 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:44:22,719 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-14 12:44:22,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:44:22,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:44:22,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:44:22,979 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:44:22,997 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:44:22,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:44:22,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:44:22,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033792913] [2020-09-14 12:44:22,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:44:22,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:44:22,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:44:22,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:44:23,000 INFO L87 Difference]: Start difference. First operand 171 states and 436 transitions. Second operand 17 states. [2020-09-14 12:44:24,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:44:24,593 INFO L93 Difference]: Finished difference Result 298 states and 732 transitions. [2020-09-14 12:44:24,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-14 12:44:24,595 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:44:24,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:44:24,596 INFO L225 Difference]: With dead ends: 298 [2020-09-14 12:44:24,596 INFO L226 Difference]: Without dead ends: 290 [2020-09-14 12:44:24,597 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=483, Invalid=1157, Unknown=0, NotChecked=0, Total=1640 [2020-09-14 12:44:24,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-09-14 12:44:24,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 169. [2020-09-14 12:44:24,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-14 12:44:24,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 429 transitions. [2020-09-14 12:44:24,600 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 429 transitions. Word has length 14 [2020-09-14 12:44:24,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:44:24,600 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 429 transitions. [2020-09-14 12:44:24,600 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:44:24,600 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 429 transitions. [2020-09-14 12:44:24,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:44:24,601 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:44:24,601 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:44:24,801 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2020-09-14 12:44:24,802 INFO L427 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:44:24,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:44:24,802 INFO L82 PathProgramCache]: Analyzing trace with hash 2122690711, now seen corresponding path program 193 times [2020-09-14 12:44:24,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:44:24,803 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736158386] [2020-09-14 12:44:24,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:44:24,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:44:25,018 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:44:25,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736158386] [2020-09-14 12:44:25,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783517691] [2020-09-14 12:44:25,019 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:44:25,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:44:25,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:44:25,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:44:25,362 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:44:25,388 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:44:25,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:44:25,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:44:25,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539962824] [2020-09-14 12:44:25,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:44:25,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:44:25,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:44:25,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:44:25,390 INFO L87 Difference]: Start difference. First operand 169 states and 429 transitions. Second operand 17 states. [2020-09-14 12:44:27,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:44:27,190 INFO L93 Difference]: Finished difference Result 291 states and 709 transitions. [2020-09-14 12:44:27,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-14 12:44:27,192 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:44:27,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:44:27,192 INFO L225 Difference]: With dead ends: 291 [2020-09-14 12:44:27,193 INFO L226 Difference]: Without dead ends: 283 [2020-09-14 12:44:27,193 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=480, Invalid=1160, Unknown=0, NotChecked=0, Total=1640 [2020-09-14 12:44:27,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-09-14 12:44:27,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 167. [2020-09-14 12:44:27,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-14 12:44:27,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 419 transitions. [2020-09-14 12:44:27,196 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 419 transitions. Word has length 14 [2020-09-14 12:44:27,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:44:27,197 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 419 transitions. [2020-09-14 12:44:27,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:44:27,197 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 419 transitions. [2020-09-14 12:44:27,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:44:27,197 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:44:27,197 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:44:27,398 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable226 [2020-09-14 12:44:27,398 INFO L427 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:44:27,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:44:27,399 INFO L82 PathProgramCache]: Analyzing trace with hash -2145285195, now seen corresponding path program 194 times [2020-09-14 12:44:27,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:44:27,399 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130449319] [2020-09-14 12:44:27,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:44:27,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:44:27,612 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:44:27,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130449319] [2020-09-14 12:44:27,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945042090] [2020-09-14 12:44:27,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:44:27,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:44:27,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:44:27,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:44:27,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:44:28,032 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:44:28,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:44:28,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:44:28,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960653503] [2020-09-14 12:44:28,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:44:28,034 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:44:28,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:44:28,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:44:28,034 INFO L87 Difference]: Start difference. First operand 167 states and 419 transitions. Second operand 17 states. [2020-09-14 12:44:29,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:44:29,594 INFO L93 Difference]: Finished difference Result 265 states and 622 transitions. [2020-09-14 12:44:29,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-14 12:44:29,596 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:44:29,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:44:29,597 INFO L225 Difference]: With dead ends: 265 [2020-09-14 12:44:29,597 INFO L226 Difference]: Without dead ends: 263 [2020-09-14 12:44:29,598 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=361, Invalid=899, Unknown=0, NotChecked=0, Total=1260 [2020-09-14 12:44:29,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-09-14 12:44:29,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 167. [2020-09-14 12:44:29,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-14 12:44:29,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 419 transitions. [2020-09-14 12:44:29,601 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 419 transitions. Word has length 14 [2020-09-14 12:44:29,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:44:29,601 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 419 transitions. [2020-09-14 12:44:29,601 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:44:29,602 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 419 transitions. [2020-09-14 12:44:29,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:44:29,602 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:44:29,602 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:44:29,802 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:44:29,803 INFO L427 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:44:29,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:44:29,803 INFO L82 PathProgramCache]: Analyzing trace with hash -2144622105, now seen corresponding path program 195 times [2020-09-14 12:44:29,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:44:29,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218098793] [2020-09-14 12:44:29,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:44:29,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:44:30,027 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:44:30,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218098793] [2020-09-14 12:44:30,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298563497] [2020-09-14 12:44:30,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:44:30,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-14 12:44:30,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:44:30,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:44:30,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:44:30,571 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:44:30,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:44:30,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:44:30,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268103438] [2020-09-14 12:44:30,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:44:30,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:44:30,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:44:30,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:44:30,574 INFO L87 Difference]: Start difference. First operand 167 states and 419 transitions. Second operand 17 states. [2020-09-14 12:44:33,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:44:33,185 INFO L93 Difference]: Finished difference Result 262 states and 627 transitions. [2020-09-14 12:44:33,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-14 12:44:33,188 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:44:33,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:44:33,189 INFO L225 Difference]: With dead ends: 262 [2020-09-14 12:44:33,189 INFO L226 Difference]: Without dead ends: 260 [2020-09-14 12:44:33,190 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=448, Invalid=1112, Unknown=0, NotChecked=0, Total=1560 [2020-09-14 12:44:33,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-09-14 12:44:33,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 169. [2020-09-14 12:44:33,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-14 12:44:33,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 426 transitions. [2020-09-14 12:44:33,196 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 426 transitions. Word has length 14 [2020-09-14 12:44:33,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:44:33,197 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 426 transitions. [2020-09-14 12:44:33,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:44:33,197 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 426 transitions. [2020-09-14 12:44:33,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:44:33,198 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:44:33,198 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:44:33,399 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2020-09-14 12:44:33,399 INFO L427 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:44:33,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:44:33,400 INFO L82 PathProgramCache]: Analyzing trace with hash -2144599785, now seen corresponding path program 196 times [2020-09-14 12:44:33,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:44:33,400 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217135616] [2020-09-14 12:44:33,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:44:33,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:44:33,701 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:44:33,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217135616] [2020-09-14 12:44:33,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131977672] [2020-09-14 12:44:33,702 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:44:33,770 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:44:33,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:44:33,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:44:33,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:44:34,242 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:44:34,305 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:44:34,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:44:34,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:44:34,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705172184] [2020-09-14 12:44:34,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:44:34,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:44:34,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:44:34,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:44:34,307 INFO L87 Difference]: Start difference. First operand 169 states and 426 transitions. Second operand 17 states. [2020-09-14 12:44:36,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:44:36,986 INFO L93 Difference]: Finished difference Result 285 states and 688 transitions. [2020-09-14 12:44:36,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-14 12:44:36,988 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:44:36,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:44:36,988 INFO L225 Difference]: With dead ends: 285 [2020-09-14 12:44:36,988 INFO L226 Difference]: Without dead ends: 280 [2020-09-14 12:44:36,989 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=587, Invalid=1393, Unknown=0, NotChecked=0, Total=1980 [2020-09-14 12:44:36,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-09-14 12:44:36,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 167. [2020-09-14 12:44:36,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-14 12:44:36,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 419 transitions. [2020-09-14 12:44:36,992 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 419 transitions. Word has length 14 [2020-09-14 12:44:36,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:44:36,992 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 419 transitions. [2020-09-14 12:44:36,993 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:44:36,993 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 419 transitions. [2020-09-14 12:44:36,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:44:36,993 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:44:36,993 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:44:37,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:44:37,194 INFO L427 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:44:37,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:44:37,194 INFO L82 PathProgramCache]: Analyzing trace with hash -2144570955, now seen corresponding path program 197 times [2020-09-14 12:44:37,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:44:37,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545781891] [2020-09-14 12:44:37,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:44:37,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:44:37,404 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:44:37,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545781891] [2020-09-14 12:44:37,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311418696] [2020-09-14 12:44:37,405 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:44:37,459 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-14 12:44:37,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:44:37,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:44:37,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:44:41,927 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:44:46,073 WARN L193 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 42 DAG size of output: 19 [2020-09-14 12:44:46,075 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:44:46,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:44:46,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-09-14 12:44:46,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979830514] [2020-09-14 12:44:46,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-14 12:44:46,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:44:46,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-14 12:44:46,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=220, Unknown=3, NotChecked=0, Total=306 [2020-09-14 12:44:46,077 INFO L87 Difference]: Start difference. First operand 167 states and 419 transitions. Second operand 18 states. [2020-09-14 12:44:50,330 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 54 DAG size of output: 38 [2020-09-14 12:44:55,040 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-09-14 12:44:59,286 WARN L193 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 59 DAG size of output: 41 [2020-09-14 12:45:00,239 WARN L193 SmtUtils]: Spent 523.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 22 [2020-09-14 12:45:02,497 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 32 [2020-09-14 12:45:20,265 WARN L193 SmtUtils]: Spent 4.77 s on a formula simplification. DAG size of input: 37 DAG size of output: 29 [2020-09-14 12:45:26,802 WARN L193 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2020-09-14 12:45:59,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:45:59,620 INFO L93 Difference]: Finished difference Result 302 states and 718 transitions. [2020-09-14 12:45:59,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-14 12:45:59,623 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-09-14 12:45:59,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:45:59,624 INFO L225 Difference]: With dead ends: 302 [2020-09-14 12:45:59,624 INFO L226 Difference]: Without dead ends: 297 [2020-09-14 12:45:59,624 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 55.3s TimeCoverageRelationStatistics Valid=561, Invalid=1408, Unknown=11, NotChecked=0, Total=1980 [2020-09-14 12:45:59,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2020-09-14 12:45:59,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 166. [2020-09-14 12:45:59,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-14 12:45:59,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 414 transitions. [2020-09-14 12:45:59,628 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 414 transitions. Word has length 14 [2020-09-14 12:45:59,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:45:59,629 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 414 transitions. [2020-09-14 12:45:59,629 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-14 12:45:59,629 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 414 transitions. [2020-09-14 12:45:59,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:45:59,629 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:45:59,629 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:45:59,830 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,224 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:45:59,830 INFO L427 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:45:59,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:45:59,831 INFO L82 PathProgramCache]: Analyzing trace with hash -2143668793, now seen corresponding path program 198 times [2020-09-14 12:45:59,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:45:59,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58519101] [2020-09-14 12:45:59,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:45:59,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:46:00,057 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:00,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58519101] [2020-09-14 12:46:00,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74030456] [2020-09-14 12:46:00,058 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:46:00,112 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-14 12:46:00,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:46:00,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:46:00,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:46:00,449 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:00,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:46:00,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:46:00,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138460656] [2020-09-14 12:46:00,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:46:00,449 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:46:00,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:46:00,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:46:00,450 INFO L87 Difference]: Start difference. First operand 166 states and 414 transitions. Second operand 17 states. [2020-09-14 12:46:01,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:46:01,116 INFO L93 Difference]: Finished difference Result 219 states and 516 transitions. [2020-09-14 12:46:01,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-14 12:46:01,118 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:46:01,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:46:01,119 INFO L225 Difference]: With dead ends: 219 [2020-09-14 12:46:01,119 INFO L226 Difference]: Without dead ends: 217 [2020-09-14 12:46:01,119 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=214, Invalid=488, Unknown=0, NotChecked=0, Total=702 [2020-09-14 12:46:01,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-09-14 12:46:01,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 167. [2020-09-14 12:46:01,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-14 12:46:01,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-09-14 12:46:01,123 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-09-14 12:46:01,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:46:01,123 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-09-14 12:46:01,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:46:01,123 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-09-14 12:46:01,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:46:01,123 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:46:01,123 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:46:01,324 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:46:01,324 INFO L427 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:46:01,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:46:01,325 INFO L82 PathProgramCache]: Analyzing trace with hash -2143646473, now seen corresponding path program 199 times [2020-09-14 12:46:01,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:46:01,325 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969442803] [2020-09-14 12:46:01,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:46:01,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:46:01,529 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:01,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969442803] [2020-09-14 12:46:01,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834444702] [2020-09-14 12:46:01,530 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:46:01,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:46:01,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:46:01,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:46:01,833 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:46:01,861 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:01,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:46:01,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:46:01,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882284609] [2020-09-14 12:46:01,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:46:01,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:46:01,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:46:01,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:46:01,863 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-09-14 12:46:02,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:46:02,768 INFO L93 Difference]: Finished difference Result 229 states and 538 transitions. [2020-09-14 12:46:02,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-14 12:46:02,770 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:46:02,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:46:02,771 INFO L225 Difference]: With dead ends: 229 [2020-09-14 12:46:02,771 INFO L226 Difference]: Without dead ends: 224 [2020-09-14 12:46:02,771 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=258, Invalid=554, Unknown=0, NotChecked=0, Total=812 [2020-09-14 12:46:02,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-09-14 12:46:02,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 158. [2020-09-14 12:46:02,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-09-14 12:46:02,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 386 transitions. [2020-09-14 12:46:02,775 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 386 transitions. Word has length 14 [2020-09-14 12:46:02,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:46:02,775 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 386 transitions. [2020-09-14 12:46:02,775 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:46:02,775 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 386 transitions. [2020-09-14 12:46:02,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:46:02,776 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:46:02,776 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:46:02,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2020-09-14 12:46:02,977 INFO L427 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:46:02,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:46:02,977 INFO L82 PathProgramCache]: Analyzing trace with hash -255670682, now seen corresponding path program 200 times [2020-09-14 12:46:02,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:46:02,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011525845] [2020-09-14 12:46:02,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:46:02,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:46:03,229 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:03,230 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011525845] [2020-09-14 12:46:03,230 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985052095] [2020-09-14 12:46:03,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:46:03,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:46:03,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:46:03,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:46:03,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:46:03,599 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:03,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:46:03,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:46:03,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210165628] [2020-09-14 12:46:03,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:46:03,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:46:03,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:46:03,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:46:03,600 INFO L87 Difference]: Start difference. First operand 158 states and 386 transitions. Second operand 17 states. [2020-09-14 12:46:04,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:46:04,256 INFO L93 Difference]: Finished difference Result 229 states and 528 transitions. [2020-09-14 12:46:04,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-14 12:46:04,258 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:46:04,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:46:04,259 INFO L225 Difference]: With dead ends: 229 [2020-09-14 12:46:04,259 INFO L226 Difference]: Without dead ends: 227 [2020-09-14 12:46:04,259 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-09-14 12:46:04,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-09-14 12:46:04,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 161. [2020-09-14 12:46:04,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-09-14 12:46:04,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 395 transitions. [2020-09-14 12:46:04,262 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 395 transitions. Word has length 14 [2020-09-14 12:46:04,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:46:04,262 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 395 transitions. [2020-09-14 12:46:04,263 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:46:04,263 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 395 transitions. [2020-09-14 12:46:04,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:46:04,263 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:46:04,263 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:46:04,464 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2020-09-14 12:46:04,464 INFO L427 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:46:04,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:46:04,465 INFO L82 PathProgramCache]: Analyzing trace with hash -255669721, now seen corresponding path program 201 times [2020-09-14 12:46:04,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:46:04,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554290540] [2020-09-14 12:46:04,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:46:04,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:46:04,725 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:04,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554290540] [2020-09-14 12:46:04,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174875605] [2020-09-14 12:46:04,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:46:04,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-14 12:46:04,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:46:04,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:46:04,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:46:05,168 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:05,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:46:05,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:46:05,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253953708] [2020-09-14 12:46:05,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:46:05,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:46:05,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:46:05,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:46:05,170 INFO L87 Difference]: Start difference. First operand 161 states and 395 transitions. Second operand 17 states. [2020-09-14 12:46:06,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:46:06,021 INFO L93 Difference]: Finished difference Result 237 states and 545 transitions. [2020-09-14 12:46:06,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-14 12:46:06,024 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:46:06,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:46:06,024 INFO L225 Difference]: With dead ends: 237 [2020-09-14 12:46:06,024 INFO L226 Difference]: Without dead ends: 235 [2020-09-14 12:46:06,025 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=195, Invalid=455, Unknown=0, NotChecked=0, Total=650 [2020-09-14 12:46:06,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-09-14 12:46:06,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 160. [2020-09-14 12:46:06,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-09-14 12:46:06,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 392 transitions. [2020-09-14 12:46:06,027 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 392 transitions. Word has length 14 [2020-09-14 12:46:06,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:46:06,028 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 392 transitions. [2020-09-14 12:46:06,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:46:06,028 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 392 transitions. [2020-09-14 12:46:06,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:46:06,028 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:46:06,028 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:46:06,230 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2020-09-14 12:46:06,231 INFO L427 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:46:06,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:46:06,231 INFO L82 PathProgramCache]: Analyzing trace with hash -255640891, now seen corresponding path program 202 times [2020-09-14 12:46:06,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:46:06,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356452063] [2020-09-14 12:46:06,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:46:06,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:46:06,486 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:06,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356452063] [2020-09-14 12:46:06,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903702685] [2020-09-14 12:46:06,487 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:46:06,539 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:46:06,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:46:06,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:46:06,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:46:08,812 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:08,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:46:08,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:46:08,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896179804] [2020-09-14 12:46:08,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:46:08,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:46:08,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:46:08,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:46:08,813 INFO L87 Difference]: Start difference. First operand 160 states and 392 transitions. Second operand 17 states. [2020-09-14 12:46:09,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:46:09,971 INFO L93 Difference]: Finished difference Result 246 states and 562 transitions. [2020-09-14 12:46:09,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-14 12:46:09,972 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:46:09,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:46:09,973 INFO L225 Difference]: With dead ends: 246 [2020-09-14 12:46:09,973 INFO L226 Difference]: Without dead ends: 244 [2020-09-14 12:46:09,973 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=254, Invalid=558, Unknown=0, NotChecked=0, Total=812 [2020-09-14 12:46:09,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-09-14 12:46:09,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 164. [2020-09-14 12:46:09,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-14 12:46:09,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 403 transitions. [2020-09-14 12:46:09,975 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 403 transitions. Word has length 14 [2020-09-14 12:46:09,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:46:09,976 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 403 transitions. [2020-09-14 12:46:09,976 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:46:09,976 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 403 transitions. [2020-09-14 12:46:09,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:46:09,976 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:46:09,976 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:46:10,177 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2020-09-14 12:46:10,177 INFO L427 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:46:10,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:46:10,178 INFO L82 PathProgramCache]: Analyzing trace with hash -254746200, now seen corresponding path program 203 times [2020-09-14 12:46:10,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:46:10,178 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449691137] [2020-09-14 12:46:10,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:46:10,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:46:10,423 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:10,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449691137] [2020-09-14 12:46:10,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110984257] [2020-09-14 12:46:10,424 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:46:10,476 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-14 12:46:10,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:46:10,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:46:10,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:46:10,879 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:10,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:46:10,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:46:10,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352634391] [2020-09-14 12:46:10,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:46:10,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:46:10,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:46:10,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:46:10,880 INFO L87 Difference]: Start difference. First operand 164 states and 403 transitions. Second operand 17 states. [2020-09-14 12:46:11,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:46:11,722 INFO L93 Difference]: Finished difference Result 245 states and 560 transitions. [2020-09-14 12:46:11,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-14 12:46:11,725 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:46:11,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:46:11,726 INFO L225 Difference]: With dead ends: 245 [2020-09-14 12:46:11,726 INFO L226 Difference]: Without dead ends: 243 [2020-09-14 12:46:11,726 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2020-09-14 12:46:11,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-09-14 12:46:11,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 163. [2020-09-14 12:46:11,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-14 12:46:11,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 399 transitions. [2020-09-14 12:46:11,730 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 399 transitions. Word has length 14 [2020-09-14 12:46:11,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:46:11,731 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 399 transitions. [2020-09-14 12:46:11,731 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:46:11,731 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 399 transitions. [2020-09-14 12:46:11,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:46:11,731 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:46:11,731 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:46:11,937 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2020-09-14 12:46:11,937 INFO L427 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:46:11,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:46:11,938 INFO L82 PathProgramCache]: Analyzing trace with hash -227041531, now seen corresponding path program 204 times [2020-09-14 12:46:11,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:46:11,939 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082175374] [2020-09-14 12:46:11,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:46:11,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:46:12,218 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:12,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082175374] [2020-09-14 12:46:12,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888882110] [2020-09-14 12:46:12,219 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:46:12,276 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-14 12:46:12,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:46:12,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:46:12,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:46:12,613 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:12,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:46:12,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:46:12,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553960264] [2020-09-14 12:46:12,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:46:12,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:46:12,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:46:12,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:46:12,615 INFO L87 Difference]: Start difference. First operand 163 states and 399 transitions. Second operand 17 states. [2020-09-14 12:46:13,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:46:13,375 INFO L93 Difference]: Finished difference Result 239 states and 549 transitions. [2020-09-14 12:46:13,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-14 12:46:13,377 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:46:13,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:46:13,378 INFO L225 Difference]: With dead ends: 239 [2020-09-14 12:46:13,378 INFO L226 Difference]: Without dead ends: 237 [2020-09-14 12:46:13,378 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=186, Invalid=414, Unknown=0, NotChecked=0, Total=600 [2020-09-14 12:46:13,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-09-14 12:46:13,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 162. [2020-09-14 12:46:13,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-14 12:46:13,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 396 transitions. [2020-09-14 12:46:13,381 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 396 transitions. Word has length 14 [2020-09-14 12:46:13,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:46:13,382 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 396 transitions. [2020-09-14 12:46:13,382 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:46:13,382 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 396 transitions. [2020-09-14 12:46:13,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:46:13,382 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:46:13,382 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:46:13,583 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2020-09-14 12:46:13,583 INFO L427 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:46:13,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:46:13,584 INFO L82 PathProgramCache]: Analyzing trace with hash -226088219, now seen corresponding path program 205 times [2020-09-14 12:46:13,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:46:13,584 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949942651] [2020-09-14 12:46:13,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:46:13,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:46:13,926 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:13,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949942651] [2020-09-14 12:46:13,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024773537] [2020-09-14 12:46:13,927 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:46:13,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:46:13,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:46:13,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:46:14,375 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:14,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:46:14,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:46:14,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364036695] [2020-09-14 12:46:14,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:46:14,377 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:46:14,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:46:14,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:46:14,377 INFO L87 Difference]: Start difference. First operand 162 states and 396 transitions. Second operand 17 states. [2020-09-14 12:46:14,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:46:14,923 INFO L93 Difference]: Finished difference Result 220 states and 508 transitions. [2020-09-14 12:46:14,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-14 12:46:14,924 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:46:14,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:46:14,925 INFO L225 Difference]: With dead ends: 220 [2020-09-14 12:46:14,925 INFO L226 Difference]: Without dead ends: 218 [2020-09-14 12:46:14,925 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-09-14 12:46:14,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-09-14 12:46:14,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 156. [2020-09-14 12:46:14,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-09-14 12:46:14,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 381 transitions. [2020-09-14 12:46:14,928 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 381 transitions. Word has length 14 [2020-09-14 12:46:14,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:46:14,928 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 381 transitions. [2020-09-14 12:46:14,928 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:46:14,928 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 381 transitions. [2020-09-14 12:46:14,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:46:14,929 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:46:14,929 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:46:15,129 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2020-09-14 12:46:15,130 INFO L427 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:46:15,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:46:15,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1976392972, now seen corresponding path program 206 times [2020-09-14 12:46:15,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:46:15,131 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972003120] [2020-09-14 12:46:15,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:46:15,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:46:15,348 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:15,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972003120] [2020-09-14 12:46:15,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849555641] [2020-09-14 12:46:15,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:46:15,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:46:15,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:46:15,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:46:15,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:46:15,852 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:15,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:46:15,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:46:15,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222674507] [2020-09-14 12:46:15,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:46:15,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:46:15,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:46:15,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:46:15,854 INFO L87 Difference]: Start difference. First operand 156 states and 381 transitions. Second operand 17 states. [2020-09-14 12:46:16,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:46:16,659 INFO L93 Difference]: Finished difference Result 229 states and 528 transitions. [2020-09-14 12:46:16,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-14 12:46:16,662 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:46:16,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:46:16,663 INFO L225 Difference]: With dead ends: 229 [2020-09-14 12:46:16,663 INFO L226 Difference]: Without dead ends: 227 [2020-09-14 12:46:16,663 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2020-09-14 12:46:16,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-09-14 12:46:16,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 160. [2020-09-14 12:46:16,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-09-14 12:46:16,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 395 transitions. [2020-09-14 12:46:16,666 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 395 transitions. Word has length 14 [2020-09-14 12:46:16,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:46:16,666 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 395 transitions. [2020-09-14 12:46:16,666 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:46:16,666 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 395 transitions. [2020-09-14 12:46:16,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:46:16,667 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:46:16,667 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:46:16,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2020-09-14 12:46:16,868 INFO L427 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:46:16,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:46:16,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1976392011, now seen corresponding path program 207 times [2020-09-14 12:46:16,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:46:16,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192545407] [2020-09-14 12:46:16,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:46:16,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:46:17,115 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:17,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192545407] [2020-09-14 12:46:17,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854198774] [2020-09-14 12:46:17,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:46:17,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-14 12:46:17,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:46:17,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:46:17,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:46:17,617 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:17,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:46:17,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:46:17,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134539393] [2020-09-14 12:46:17,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:46:17,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:46:17,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:46:17,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:46:17,619 INFO L87 Difference]: Start difference. First operand 160 states and 395 transitions. Second operand 17 states. [2020-09-14 12:46:18,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:46:18,365 INFO L93 Difference]: Finished difference Result 233 states and 536 transitions. [2020-09-14 12:46:18,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-14 12:46:18,368 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:46:18,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:46:18,368 INFO L225 Difference]: With dead ends: 233 [2020-09-14 12:46:18,368 INFO L226 Difference]: Without dead ends: 231 [2020-09-14 12:46:18,369 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=174, Invalid=476, Unknown=0, NotChecked=0, Total=650 [2020-09-14 12:46:18,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-09-14 12:46:18,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 159. [2020-09-14 12:46:18,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-09-14 12:46:18,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 392 transitions. [2020-09-14 12:46:18,372 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 392 transitions. Word has length 14 [2020-09-14 12:46:18,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:46:18,372 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 392 transitions. [2020-09-14 12:46:18,372 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:46:18,372 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 392 transitions. [2020-09-14 12:46:18,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:46:18,373 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:46:18,373 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:46:18,573 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:46:18,574 INFO L427 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:46:18,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:46:18,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1976363181, now seen corresponding path program 208 times [2020-09-14 12:46:18,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:46:18,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134890202] [2020-09-14 12:46:18,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:46:18,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:46:18,822 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:18,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134890202] [2020-09-14 12:46:18,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528059796] [2020-09-14 12:46:18,823 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:46:18,875 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:46:18,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:46:18,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:46:18,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:46:19,520 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:19,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:46:19,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:46:19,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122752802] [2020-09-14 12:46:19,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:46:19,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:46:19,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:46:19,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:46:19,521 INFO L87 Difference]: Start difference. First operand 159 states and 392 transitions. Second operand 17 states. [2020-09-14 12:46:20,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:46:20,821 INFO L93 Difference]: Finished difference Result 256 states and 582 transitions. [2020-09-14 12:46:20,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-14 12:46:20,823 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:46:20,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:46:20,824 INFO L225 Difference]: With dead ends: 256 [2020-09-14 12:46:20,824 INFO L226 Difference]: Without dead ends: 254 [2020-09-14 12:46:20,824 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=259, Invalid=671, Unknown=0, NotChecked=0, Total=930 [2020-09-14 12:46:20,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-09-14 12:46:20,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 163. [2020-09-14 12:46:20,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-14 12:46:20,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 403 transitions. [2020-09-14 12:46:20,827 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 403 transitions. Word has length 14 [2020-09-14 12:46:20,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:46:20,827 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 403 transitions. [2020-09-14 12:46:20,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:46:20,827 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 403 transitions. [2020-09-14 12:46:20,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:46:20,828 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:46:20,828 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:46:21,028 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:46:21,029 INFO L427 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:46:21,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:46:21,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1975468490, now seen corresponding path program 209 times [2020-09-14 12:46:21,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:46:21,030 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470338024] [2020-09-14 12:46:21,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:46:21,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:46:21,267 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:21,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470338024] [2020-09-14 12:46:21,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879638383] [2020-09-14 12:46:21,273 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:46:21,323 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-14 12:46:21,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:46:21,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:46:21,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:46:21,715 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:21,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:46:21,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:46:21,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118552532] [2020-09-14 12:46:21,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:46:21,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:46:21,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:46:21,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:46:21,716 INFO L87 Difference]: Start difference. First operand 163 states and 403 transitions. Second operand 17 states. [2020-09-14 12:46:22,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:46:22,743 INFO L93 Difference]: Finished difference Result 246 states and 562 transitions. [2020-09-14 12:46:22,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-14 12:46:22,746 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:46:22,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:46:22,747 INFO L225 Difference]: With dead ends: 246 [2020-09-14 12:46:22,747 INFO L226 Difference]: Without dead ends: 244 [2020-09-14 12:46:22,747 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=220, Invalid=592, Unknown=0, NotChecked=0, Total=812 [2020-09-14 12:46:22,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-09-14 12:46:22,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 162. [2020-09-14 12:46:22,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-14 12:46:22,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 399 transitions. [2020-09-14 12:46:22,750 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 399 transitions. Word has length 14 [2020-09-14 12:46:22,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:46:22,751 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 399 transitions. [2020-09-14 12:46:22,751 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:46:22,751 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 399 transitions. [2020-09-14 12:46:22,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:46:22,751 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:46:22,751 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:46:22,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:46:22,952 INFO L427 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:46:22,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:46:22,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1339163482, now seen corresponding path program 210 times [2020-09-14 12:46:22,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:46:22,953 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86232358] [2020-09-14 12:46:22,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:46:22,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:46:23,201 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:23,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86232358] [2020-09-14 12:46:23,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320159917] [2020-09-14 12:46:23,201 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:46:23,255 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-14 12:46:23,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:46:23,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:46:23,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:46:23,593 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:23,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:46:23,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:46:23,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991736612] [2020-09-14 12:46:23,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:46:23,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:46:23,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:46:23,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:46:23,595 INFO L87 Difference]: Start difference. First operand 162 states and 399 transitions. Second operand 17 states. [2020-09-14 12:46:24,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:46:24,602 INFO L93 Difference]: Finished difference Result 250 states and 575 transitions. [2020-09-14 12:46:24,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-14 12:46:24,604 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:46:24,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:46:24,605 INFO L225 Difference]: With dead ends: 250 [2020-09-14 12:46:24,605 INFO L226 Difference]: Without dead ends: 248 [2020-09-14 12:46:24,606 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=258, Invalid=672, Unknown=0, NotChecked=0, Total=930 [2020-09-14 12:46:24,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-09-14 12:46:24,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 164. [2020-09-14 12:46:24,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-14 12:46:24,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 407 transitions. [2020-09-14 12:46:24,609 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 407 transitions. Word has length 14 [2020-09-14 12:46:24,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:46:24,609 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 407 transitions. [2020-09-14 12:46:24,609 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:46:24,609 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 407 transitions. [2020-09-14 12:46:24,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:46:24,610 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:46:24,610 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:46:24,810 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2020-09-14 12:46:24,810 INFO L427 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:46:24,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:46:24,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1339162521, now seen corresponding path program 211 times [2020-09-14 12:46:24,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:46:24,812 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951830630] [2020-09-14 12:46:24,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:46:24,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:46:25,055 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:25,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951830630] [2020-09-14 12:46:25,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969022685] [2020-09-14 12:46:25,056 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:46:25,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:46:25,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:46:25,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:46:25,546 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:25,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:46:25,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:46:25,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823003930] [2020-09-14 12:46:25,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:46:25,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:46:25,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:46:25,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:46:25,548 INFO L87 Difference]: Start difference. First operand 164 states and 407 transitions. Second operand 17 states. [2020-09-14 12:46:26,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:46:26,483 INFO L93 Difference]: Finished difference Result 245 states and 564 transitions. [2020-09-14 12:46:26,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-14 12:46:26,485 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:46:26,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:46:26,486 INFO L225 Difference]: With dead ends: 245 [2020-09-14 12:46:26,486 INFO L226 Difference]: Without dead ends: 243 [2020-09-14 12:46:26,487 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=220, Invalid=592, Unknown=0, NotChecked=0, Total=812 [2020-09-14 12:46:26,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-09-14 12:46:26,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 164. [2020-09-14 12:46:26,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-14 12:46:26,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 407 transitions. [2020-09-14 12:46:26,490 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 407 transitions. Word has length 14 [2020-09-14 12:46:26,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:46:26,490 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 407 transitions. [2020-09-14 12:46:26,490 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:46:26,490 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 407 transitions. [2020-09-14 12:46:26,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:46:26,490 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:46:26,491 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:46:26,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable244,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:46:26,692 INFO L427 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:46:26,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:46:26,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1339133691, now seen corresponding path program 212 times [2020-09-14 12:46:26,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:46:26,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640758792] [2020-09-14 12:46:26,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:46:26,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:46:26,950 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:26,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640758792] [2020-09-14 12:46:26,951 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803139112] [2020-09-14 12:46:26,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:46:27,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:46:27,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:46:27,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:46:27,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:46:29,363 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:29,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:46:29,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:46:29,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38698697] [2020-09-14 12:46:29,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:46:29,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:46:29,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:46:29,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:46:29,365 INFO L87 Difference]: Start difference. First operand 164 states and 407 transitions. Second operand 17 states. [2020-09-14 12:46:30,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:46:30,904 INFO L93 Difference]: Finished difference Result 262 states and 602 transitions. [2020-09-14 12:46:30,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-14 12:46:30,907 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:46:30,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:46:30,908 INFO L225 Difference]: With dead ends: 262 [2020-09-14 12:46:30,908 INFO L226 Difference]: Without dead ends: 260 [2020-09-14 12:46:30,908 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2020-09-14 12:46:30,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-09-14 12:46:30,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 165. [2020-09-14 12:46:30,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-09-14 12:46:30,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 411 transitions. [2020-09-14 12:46:30,912 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 411 transitions. Word has length 14 [2020-09-14 12:46:30,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:46:30,912 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 411 transitions. [2020-09-14 12:46:30,913 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:46:30,913 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 411 transitions. [2020-09-14 12:46:30,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:46:30,913 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:46:30,913 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:46:31,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2020-09-14 12:46:31,114 INFO L427 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:46:31,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:46:31,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1318607692, now seen corresponding path program 213 times [2020-09-14 12:46:31,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:46:31,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102152864] [2020-09-14 12:46:31,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:46:31,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:46:31,417 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:31,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102152864] [2020-09-14 12:46:31,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798145078] [2020-09-14 12:46:31,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:46:31,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-14 12:46:31,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:46:31,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:46:31,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:46:31,906 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:31,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:46:31,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:46:31,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244481821] [2020-09-14 12:46:31,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:46:31,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:46:31,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:46:31,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:46:31,911 INFO L87 Difference]: Start difference. First operand 165 states and 411 transitions. Second operand 17 states. [2020-09-14 12:46:33,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:46:33,103 INFO L93 Difference]: Finished difference Result 254 states and 594 transitions. [2020-09-14 12:46:33,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-14 12:46:33,106 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:46:33,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:46:33,107 INFO L225 Difference]: With dead ends: 254 [2020-09-14 12:46:33,107 INFO L226 Difference]: Without dead ends: 252 [2020-09-14 12:46:33,107 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=303, Invalid=753, Unknown=0, NotChecked=0, Total=1056 [2020-09-14 12:46:33,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-09-14 12:46:33,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 166. [2020-09-14 12:46:33,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-14 12:46:33,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 416 transitions. [2020-09-14 12:46:33,110 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 416 transitions. Word has length 14 [2020-09-14 12:46:33,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:46:33,111 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 416 transitions. [2020-09-14 12:46:33,111 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:46:33,111 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 416 transitions. [2020-09-14 12:46:33,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:46:33,111 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:46:33,111 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:46:33,312 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2020-09-14 12:46:33,313 INFO L427 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:46:33,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:46:33,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1318606731, now seen corresponding path program 214 times [2020-09-14 12:46:33,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:46:33,314 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871135667] [2020-09-14 12:46:33,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:46:33,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:46:33,566 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:33,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871135667] [2020-09-14 12:46:33,567 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601331301] [2020-09-14 12:46:33,567 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:46:33,619 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:46:33,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:46:33,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:46:33,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:46:34,027 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:34,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:46:34,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:46:34,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565728293] [2020-09-14 12:46:34,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:46:34,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:46:34,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:46:34,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:46:34,028 INFO L87 Difference]: Start difference. First operand 166 states and 416 transitions. Second operand 17 states. [2020-09-14 12:46:35,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:46:35,318 INFO L93 Difference]: Finished difference Result 248 states and 576 transitions. [2020-09-14 12:46:35,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-14 12:46:35,321 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:46:35,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:46:35,322 INFO L225 Difference]: With dead ends: 248 [2020-09-14 12:46:35,322 INFO L226 Difference]: Without dead ends: 246 [2020-09-14 12:46:35,322 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=277, Invalid=715, Unknown=0, NotChecked=0, Total=992 [2020-09-14 12:46:35,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-09-14 12:46:35,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 167. [2020-09-14 12:46:35,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-14 12:46:35,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 418 transitions. [2020-09-14 12:46:35,325 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 418 transitions. Word has length 14 [2020-09-14 12:46:35,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:46:35,325 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 418 transitions. [2020-09-14 12:46:35,325 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:46:35,325 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 418 transitions. [2020-09-14 12:46:35,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:46:35,325 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:46:35,326 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:46:35,526 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:46:35,526 INFO L427 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:46:35,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:46:35,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1317944602, now seen corresponding path program 215 times [2020-09-14 12:46:35,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:46:35,527 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747460416] [2020-09-14 12:46:35,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:46:35,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:46:35,780 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:35,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747460416] [2020-09-14 12:46:35,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716040311] [2020-09-14 12:46:35,781 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:46:35,834 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-14 12:46:35,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:46:35,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:46:35,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:46:36,122 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:36,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:46:36,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:46:36,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006307203] [2020-09-14 12:46:36,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:46:36,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:46:36,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:46:36,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:46:36,124 INFO L87 Difference]: Start difference. First operand 167 states and 418 transitions. Second operand 17 states. [2020-09-14 12:46:37,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:46:37,539 INFO L93 Difference]: Finished difference Result 245 states and 579 transitions. [2020-09-14 12:46:37,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-14 12:46:37,542 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:46:37,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:46:37,542 INFO L225 Difference]: With dead ends: 245 [2020-09-14 12:46:37,542 INFO L226 Difference]: Without dead ends: 243 [2020-09-14 12:46:37,543 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=324, Invalid=798, Unknown=0, NotChecked=0, Total=1122 [2020-09-14 12:46:37,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-09-14 12:46:37,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 169. [2020-09-14 12:46:37,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-14 12:46:37,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2020-09-14 12:46:37,547 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 14 [2020-09-14 12:46:37,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:46:37,547 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2020-09-14 12:46:37,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:46:37,548 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2020-09-14 12:46:37,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:46:37,548 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:46:37,548 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:46:37,760 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:46:37,760 INFO L427 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:46:37,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:46:37,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1317923243, now seen corresponding path program 216 times [2020-09-14 12:46:37,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:46:37,762 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855061927] [2020-09-14 12:46:37,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:46:37,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:46:37,990 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:37,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855061927] [2020-09-14 12:46:37,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614394813] [2020-09-14 12:46:37,991 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:46:38,045 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-14 12:46:38,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:46:38,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:46:38,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:46:38,338 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:46:38,364 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:38,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:46:38,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:46:38,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972907783] [2020-09-14 12:46:38,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:46:38,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:46:38,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:46:38,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:46:38,366 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand 17 states. [2020-09-14 12:46:39,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:46:39,322 INFO L93 Difference]: Finished difference Result 223 states and 540 transitions. [2020-09-14 12:46:39,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-14 12:46:39,325 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:46:39,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:46:39,326 INFO L225 Difference]: With dead ends: 223 [2020-09-14 12:46:39,326 INFO L226 Difference]: Without dead ends: 218 [2020-09-14 12:46:39,326 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=258, Invalid=554, Unknown=0, NotChecked=0, Total=812 [2020-09-14 12:46:39,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-09-14 12:46:39,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 169. [2020-09-14 12:46:39,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-14 12:46:39,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2020-09-14 12:46:39,329 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 14 [2020-09-14 12:46:39,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:46:39,330 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2020-09-14 12:46:39,330 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:46:39,330 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2020-09-14 12:46:39,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:46:39,330 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:46:39,330 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:46:39,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2020-09-14 12:46:39,531 INFO L427 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:46:39,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:46:39,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1317922282, now seen corresponding path program 217 times [2020-09-14 12:46:39,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:46:39,533 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121913557] [2020-09-14 12:46:39,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:46:39,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:46:39,773 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:39,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121913557] [2020-09-14 12:46:39,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283645579] [2020-09-14 12:46:39,774 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:46:39,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:46:39,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:46:39,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:46:40,177 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:46:40,280 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:40,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:46:40,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:46:40,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498562745] [2020-09-14 12:46:40,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:46:40,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:46:40,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:46:40,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:46:40,282 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand 17 states. [2020-09-14 12:46:42,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:46:42,059 INFO L93 Difference]: Finished difference Result 286 states and 679 transitions. [2020-09-14 12:46:42,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-14 12:46:42,062 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:46:42,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:46:42,063 INFO L225 Difference]: With dead ends: 286 [2020-09-14 12:46:42,063 INFO L226 Difference]: Without dead ends: 281 [2020-09-14 12:46:42,063 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=384, Invalid=948, Unknown=0, NotChecked=0, Total=1332 [2020-09-14 12:46:42,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-09-14 12:46:42,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 167. [2020-09-14 12:46:42,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-14 12:46:42,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 418 transitions. [2020-09-14 12:46:42,066 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 418 transitions. Word has length 14 [2020-09-14 12:46:42,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:46:42,067 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 418 transitions. [2020-09-14 12:46:42,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:46:42,067 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 418 transitions. [2020-09-14 12:46:42,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:46:42,067 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:46:42,067 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:46:42,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:46:42,268 INFO L427 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:46:42,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:46:42,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1317914811, now seen corresponding path program 218 times [2020-09-14 12:46:42,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:46:42,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882274298] [2020-09-14 12:46:42,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:46:42,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:46:42,520 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:42,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882274298] [2020-09-14 12:46:42,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460952738] [2020-09-14 12:46:42,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:46:42,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:46:42,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:46:42,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:46:42,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:46:43,032 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:43,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:46:43,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:46:43,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838075744] [2020-09-14 12:46:43,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:46:43,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:46:43,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:46:43,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:46:43,033 INFO L87 Difference]: Start difference. First operand 167 states and 418 transitions. Second operand 17 states. [2020-09-14 12:46:44,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:46:44,384 INFO L93 Difference]: Finished difference Result 268 states and 630 transitions. [2020-09-14 12:46:44,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-14 12:46:44,385 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:46:44,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:46:44,386 INFO L225 Difference]: With dead ends: 268 [2020-09-14 12:46:44,386 INFO L226 Difference]: Without dead ends: 266 [2020-09-14 12:46:44,387 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=335, Invalid=855, Unknown=0, NotChecked=0, Total=1190 [2020-09-14 12:46:44,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-09-14 12:46:44,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 169. [2020-09-14 12:46:44,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-14 12:46:44,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2020-09-14 12:46:44,390 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 14 [2020-09-14 12:46:44,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:46:44,391 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2020-09-14 12:46:44,391 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:46:44,391 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2020-09-14 12:46:44,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:46:44,391 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:46:44,391 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:46:44,592 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable251 [2020-09-14 12:46:44,592 INFO L427 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:46:44,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:46:44,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1317893452, now seen corresponding path program 219 times [2020-09-14 12:46:44,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:46:44,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334419097] [2020-09-14 12:46:44,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:46:44,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:46:44,839 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:44,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334419097] [2020-09-14 12:46:44,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184457759] [2020-09-14 12:46:44,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:46:44,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-14 12:46:44,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:46:44,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:46:44,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:46:45,211 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:46:45,292 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:45,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:46:45,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:46:45,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640100380] [2020-09-14 12:46:45,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:46:45,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:46:45,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:46:45,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:46:45,295 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand 17 states. [2020-09-14 12:46:47,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:46:47,257 INFO L93 Difference]: Finished difference Result 296 states and 707 transitions. [2020-09-14 12:46:47,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-14 12:46:47,259 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:46:47,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:46:47,260 INFO L225 Difference]: With dead ends: 296 [2020-09-14 12:46:47,260 INFO L226 Difference]: Without dead ends: 291 [2020-09-14 12:46:47,261 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=419, Invalid=987, Unknown=0, NotChecked=0, Total=1406 [2020-09-14 12:46:47,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-09-14 12:46:47,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 169. [2020-09-14 12:46:47,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-14 12:46:47,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2020-09-14 12:46:47,264 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 14 [2020-09-14 12:46:47,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:46:47,264 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2020-09-14 12:46:47,264 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:46:47,264 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2020-09-14 12:46:47,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:46:47,265 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:46:47,265 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:46:47,465 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:46:47,466 INFO L427 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:46:47,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:46:47,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1317892491, now seen corresponding path program 220 times [2020-09-14 12:46:47,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:46:47,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96513318] [2020-09-14 12:46:47,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:46:47,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:46:47,738 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:47,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96513318] [2020-09-14 12:46:47,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021955735] [2020-09-14 12:46:47,739 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:46:47,793 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:46:47,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:46:47,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:46:47,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:46:48,158 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:46:48,198 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:48,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:46:48,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:46:48,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096480416] [2020-09-14 12:46:48,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:46:48,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:46:48,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:46:48,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:46:48,199 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand 17 states. [2020-09-14 12:46:50,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:46:50,203 INFO L93 Difference]: Finished difference Result 299 states and 710 transitions. [2020-09-14 12:46:50,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-14 12:46:50,206 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:46:50,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:46:50,207 INFO L225 Difference]: With dead ends: 299 [2020-09-14 12:46:50,207 INFO L226 Difference]: Without dead ends: 294 [2020-09-14 12:46:50,208 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=476, Invalid=1084, Unknown=0, NotChecked=0, Total=1560 [2020-09-14 12:46:50,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-09-14 12:46:50,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 165. [2020-09-14 12:46:50,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-09-14 12:46:50,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 411 transitions. [2020-09-14 12:46:50,212 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 411 transitions. Word has length 14 [2020-09-14 12:46:50,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:46:50,212 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 411 transitions. [2020-09-14 12:46:50,212 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:46:50,213 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 411 transitions. [2020-09-14 12:46:50,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:46:50,213 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:46:50,213 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:46:50,413 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:46:50,414 INFO L427 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:46:50,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:46:50,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1317684171, now seen corresponding path program 221 times [2020-09-14 12:46:50,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:46:50,415 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057570546] [2020-09-14 12:46:50,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:46:50,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:46:50,638 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:50,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057570546] [2020-09-14 12:46:50,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568713633] [2020-09-14 12:46:50,639 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:46:50,692 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-14 12:46:50,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:46:50,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:46:50,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:46:53,208 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:53,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:46:53,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:46:53,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484893171] [2020-09-14 12:46:53,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:46:53,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:46:53,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:46:53,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:46:53,210 INFO L87 Difference]: Start difference. First operand 165 states and 411 transitions. Second operand 17 states. [2020-09-14 12:46:55,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:46:55,116 INFO L93 Difference]: Finished difference Result 274 states and 633 transitions. [2020-09-14 12:46:55,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-14 12:46:55,119 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:46:55,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:46:55,120 INFO L225 Difference]: With dead ends: 274 [2020-09-14 12:46:55,120 INFO L226 Difference]: Without dead ends: 272 [2020-09-14 12:46:55,121 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=358, Invalid=902, Unknown=0, NotChecked=0, Total=1260 [2020-09-14 12:46:55,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-09-14 12:46:55,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 169. [2020-09-14 12:46:55,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-14 12:46:55,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 426 transitions. [2020-09-14 12:46:55,126 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 426 transitions. Word has length 14 [2020-09-14 12:46:55,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:46:55,126 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 426 transitions. [2020-09-14 12:46:55,126 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:46:55,126 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 426 transitions. [2020-09-14 12:46:55,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:46:55,127 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:46:55,127 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:46:55,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:46:55,339 INFO L427 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:46:55,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:46:55,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1317021081, now seen corresponding path program 222 times [2020-09-14 12:46:55,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:46:55,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640199270] [2020-09-14 12:46:55,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:46:55,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:46:55,603 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:55,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640199270] [2020-09-14 12:46:55,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191361598] [2020-09-14 12:46:55,604 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:46:55,662 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-14 12:46:55,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:46:55,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:46:55,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:46:56,202 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:56,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:46:56,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:46:56,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462987649] [2020-09-14 12:46:56,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:46:56,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:46:56,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:46:56,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:46:56,209 INFO L87 Difference]: Start difference. First operand 169 states and 426 transitions. Second operand 17 states. [2020-09-14 12:46:58,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:46:58,390 INFO L93 Difference]: Finished difference Result 282 states and 670 transitions. [2020-09-14 12:46:58,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-14 12:46:58,392 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:46:58,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:46:58,397 INFO L225 Difference]: With dead ends: 282 [2020-09-14 12:46:58,397 INFO L226 Difference]: Without dead ends: 280 [2020-09-14 12:46:58,398 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=397, Invalid=935, Unknown=0, NotChecked=0, Total=1332 [2020-09-14 12:46:58,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-09-14 12:46:58,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 174. [2020-09-14 12:46:58,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-09-14 12:46:58,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 442 transitions. [2020-09-14 12:46:58,401 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 442 transitions. Word has length 14 [2020-09-14 12:46:58,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:46:58,401 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 442 transitions. [2020-09-14 12:46:58,401 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:46:58,402 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 442 transitions. [2020-09-14 12:46:58,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:46:58,402 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:46:58,402 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:46:58,605 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2020-09-14 12:46:58,606 INFO L427 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:46:58,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:46:58,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1316999722, now seen corresponding path program 223 times [2020-09-14 12:46:58,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:46:58,608 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973371130] [2020-09-14 12:46:58,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:46:58,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:46:58,883 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:58,884 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973371130] [2020-09-14 12:46:58,884 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807304071] [2020-09-14 12:46:58,884 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:46:58,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:46:58,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:46:58,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:46:59,325 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:46:59,469 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:59,469 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:46:59,470 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:46:59,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862391646] [2020-09-14 12:46:59,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:46:59,471 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:46:59,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:46:59,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:46:59,472 INFO L87 Difference]: Start difference. First operand 174 states and 442 transitions. Second operand 17 states. [2020-09-14 12:47:02,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:47:02,799 INFO L93 Difference]: Finished difference Result 321 states and 773 transitions. [2020-09-14 12:47:02,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-14 12:47:02,804 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:47:02,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:47:02,804 INFO L225 Difference]: With dead ends: 321 [2020-09-14 12:47:02,805 INFO L226 Difference]: Without dead ends: 313 [2020-09-14 12:47:02,805 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=528, Invalid=1278, Unknown=0, NotChecked=0, Total=1806 [2020-09-14 12:47:02,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-09-14 12:47:02,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 176. [2020-09-14 12:47:02,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-09-14 12:47:02,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 452 transitions. [2020-09-14 12:47:02,809 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 452 transitions. Word has length 14 [2020-09-14 12:47:02,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:47:02,809 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 452 transitions. [2020-09-14 12:47:02,809 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:47:02,809 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 452 transitions. [2020-09-14 12:47:02,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:47:02,810 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:47:02,810 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:47:03,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2020-09-14 12:47:03,014 INFO L427 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:47:03,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:47:03,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1316998761, now seen corresponding path program 224 times [2020-09-14 12:47:03,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:47:03,015 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569776750] [2020-09-14 12:47:03,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:47:03,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:47:03,303 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:47:03,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569776750] [2020-09-14 12:47:03,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227243987] [2020-09-14 12:47:03,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:47:03,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:47:03,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:47:03,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:47:03,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:47:07,995 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:47:08,080 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:47:08,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:47:08,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:47:08,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087339777] [2020-09-14 12:47:08,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:47:08,081 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:47:08,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:47:08,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=190, Unknown=2, NotChecked=0, Total=272 [2020-09-14 12:47:08,082 INFO L87 Difference]: Start difference. First operand 176 states and 452 transitions. Second operand 17 states. [2020-09-14 12:47:13,179 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2020-09-14 12:47:17,402 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-09-14 12:47:21,797 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 58 DAG size of output: 39 [2020-09-14 12:47:26,171 WARN L193 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2020-09-14 12:47:28,309 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 32 [2020-09-14 12:47:33,144 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-09-14 12:47:34,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:47:34,302 INFO L93 Difference]: Finished difference Result 323 states and 782 transitions. [2020-09-14 12:47:34,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-14 12:47:34,305 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:47:34,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:47:34,306 INFO L225 Difference]: With dead ends: 323 [2020-09-14 12:47:34,306 INFO L226 Difference]: Without dead ends: 315 [2020-09-14 12:47:34,307 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 30.2s TimeCoverageRelationStatistics Valid=530, Invalid=1274, Unknown=2, NotChecked=0, Total=1806 [2020-09-14 12:47:34,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-09-14 12:47:34,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 171. [2020-09-14 12:47:34,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-09-14 12:47:34,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 436 transitions. [2020-09-14 12:47:34,310 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 436 transitions. Word has length 14 [2020-09-14 12:47:34,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:47:34,311 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 436 transitions. [2020-09-14 12:47:34,311 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:47:34,311 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 436 transitions. [2020-09-14 12:47:34,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:47:34,311 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:47:34,311 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:47:34,512 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2020-09-14 12:47:34,512 INFO L427 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:47:34,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:47:34,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1316969931, now seen corresponding path program 225 times [2020-09-14 12:47:34,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:47:34,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543861728] [2020-09-14 12:47:34,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:47:34,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:47:34,807 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:47:34,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543861728] [2020-09-14 12:47:34,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277926170] [2020-09-14 12:47:34,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:47:34,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-14 12:47:34,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:47:34,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:47:34,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:47:35,259 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:47:35,266 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:47:35,337 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:47:35,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:47:35,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:47:35,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073076695] [2020-09-14 12:47:35,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:47:35,338 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:47:35,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:47:35,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:47:35,339 INFO L87 Difference]: Start difference. First operand 171 states and 436 transitions. Second operand 17 states. [2020-09-14 12:47:38,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:47:38,726 INFO L93 Difference]: Finished difference Result 320 states and 767 transitions. [2020-09-14 12:47:38,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-14 12:47:38,730 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:47:38,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:47:38,731 INFO L225 Difference]: With dead ends: 320 [2020-09-14 12:47:38,737 INFO L226 Difference]: Without dead ends: 312 [2020-09-14 12:47:38,738 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=587, Invalid=1393, Unknown=0, NotChecked=0, Total=1980 [2020-09-14 12:47:38,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2020-09-14 12:47:38,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 170. [2020-09-14 12:47:38,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-09-14 12:47:38,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 431 transitions. [2020-09-14 12:47:38,741 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 431 transitions. Word has length 14 [2020-09-14 12:47:38,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:47:38,741 INFO L479 AbstractCegarLoop]: Abstraction has 170 states and 431 transitions. [2020-09-14 12:47:38,741 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:47:38,741 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 431 transitions. [2020-09-14 12:47:38,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:47:38,741 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:47:38,742 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:47:38,945 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2020-09-14 12:47:38,946 INFO L427 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:47:38,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:47:38,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1310533370, now seen corresponding path program 226 times [2020-09-14 12:47:38,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:47:38,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831332271] [2020-09-14 12:47:38,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:47:38,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:47:39,241 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:47:39,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831332271] [2020-09-14 12:47:39,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29028185] [2020-09-14 12:47:39,242 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:47:39,299 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:47:39,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:47:39,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:47:39,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:47:39,811 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:47:39,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:47:39,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:47:39,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997058323] [2020-09-14 12:47:39,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:47:39,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:47:39,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:47:39,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:47:39,813 INFO L87 Difference]: Start difference. First operand 170 states and 431 transitions. Second operand 17 states. [2020-09-14 12:47:41,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:47:41,184 INFO L93 Difference]: Finished difference Result 256 states and 599 transitions. [2020-09-14 12:47:41,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-14 12:47:41,188 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:47:41,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:47:41,188 INFO L225 Difference]: With dead ends: 256 [2020-09-14 12:47:41,188 INFO L226 Difference]: Without dead ends: 254 [2020-09-14 12:47:41,189 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=259, Invalid=671, Unknown=0, NotChecked=0, Total=930 [2020-09-14 12:47:41,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-09-14 12:47:41,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 168. [2020-09-14 12:47:41,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-09-14 12:47:41,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 425 transitions. [2020-09-14 12:47:41,192 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 425 transitions. Word has length 14 [2020-09-14 12:47:41,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:47:41,192 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 425 transitions. [2020-09-14 12:47:41,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:47:41,192 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 425 transitions. [2020-09-14 12:47:41,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:47:41,192 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:47:41,193 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:47:41,393 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2020-09-14 12:47:41,394 INFO L427 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:47:41,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:47:41,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1289978541, now seen corresponding path program 227 times [2020-09-14 12:47:41,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:47:41,395 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010505647] [2020-09-14 12:47:41,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:47:41,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:47:41,690 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:47:41,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010505647] [2020-09-14 12:47:41,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857934026] [2020-09-14 12:47:41,691 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:47:41,746 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-14 12:47:41,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:47:41,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:47:41,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:47:42,313 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:47:42,313 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:47:42,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:47:42,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813431018] [2020-09-14 12:47:42,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:47:42,314 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:47:42,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:47:42,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:47:42,315 INFO L87 Difference]: Start difference. First operand 168 states and 425 transitions. Second operand 17 states. [2020-09-14 12:47:44,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:47:44,501 INFO L93 Difference]: Finished difference Result 294 states and 688 transitions. [2020-09-14 12:47:44,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-14 12:47:44,505 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:47:44,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:47:44,506 INFO L225 Difference]: With dead ends: 294 [2020-09-14 12:47:44,506 INFO L226 Difference]: Without dead ends: 292 [2020-09-14 12:47:44,506 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=389, Invalid=943, Unknown=0, NotChecked=0, Total=1332 [2020-09-14 12:47:44,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-09-14 12:47:44,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 166. [2020-09-14 12:47:44,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-14 12:47:44,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 423 transitions. [2020-09-14 12:47:44,510 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 423 transitions. Word has length 14 [2020-09-14 12:47:44,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:47:44,510 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 423 transitions. [2020-09-14 12:47:44,510 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:47:44,511 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 423 transitions. [2020-09-14 12:47:44,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:47:44,511 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:47:44,511 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:47:44,711 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:47:44,712 INFO L427 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:47:44,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:47:44,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1289977580, now seen corresponding path program 228 times [2020-09-14 12:47:44,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:47:44,713 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336705772] [2020-09-14 12:47:44,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:47:44,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:47:45,010 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:47:45,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336705772] [2020-09-14 12:47:45,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281748765] [2020-09-14 12:47:45,011 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:47:45,072 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-14 12:47:45,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:47:45,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:47:45,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:47:45,570 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:47:45,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:47:45,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:47:45,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637166860] [2020-09-14 12:47:45,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:47:45,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:47:45,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:47:45,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:47:45,573 INFO L87 Difference]: Start difference. First operand 166 states and 423 transitions. Second operand 17 states. [2020-09-14 12:47:47,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:47:47,358 INFO L93 Difference]: Finished difference Result 266 states and 625 transitions. [2020-09-14 12:47:47,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-14 12:47:47,362 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:47:47,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:47:47,362 INFO L225 Difference]: With dead ends: 266 [2020-09-14 12:47:47,362 INFO L226 Difference]: Without dead ends: 264 [2020-09-14 12:47:47,363 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=316, Invalid=806, Unknown=0, NotChecked=0, Total=1122 [2020-09-14 12:47:47,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-09-14 12:47:47,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 164. [2020-09-14 12:47:47,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-14 12:47:47,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 417 transitions. [2020-09-14 12:47:47,366 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 417 transitions. Word has length 14 [2020-09-14 12:47:47,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:47:47,366 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 417 transitions. [2020-09-14 12:47:47,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:47:47,367 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 417 transitions. [2020-09-14 12:47:47,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:47:47,367 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:47:47,367 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:47:47,567 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:47:47,568 INFO L427 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:47:47,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:47:47,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1289315451, now seen corresponding path program 229 times [2020-09-14 12:47:47,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:47:47,569 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937881388] [2020-09-14 12:47:47,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:47:47,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:47:47,863 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:47:47,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937881388] [2020-09-14 12:47:47,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624613542] [2020-09-14 12:47:47,864 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:47:47,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:47:47,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:47:47,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:47:48,397 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:47:48,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:47:48,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:47:48,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511493383] [2020-09-14 12:47:48,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:47:48,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:47:48,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:47:48,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:47:48,399 INFO L87 Difference]: Start difference. First operand 164 states and 417 transitions. Second operand 17 states. [2020-09-14 12:47:50,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:47:50,669 INFO L93 Difference]: Finished difference Result 275 states and 656 transitions. [2020-09-14 12:47:50,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-14 12:47:50,673 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:47:50,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:47:50,674 INFO L225 Difference]: With dead ends: 275 [2020-09-14 12:47:50,674 INFO L226 Difference]: Without dead ends: 273 [2020-09-14 12:47:50,675 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=407, Invalid=999, Unknown=0, NotChecked=0, Total=1406 [2020-09-14 12:47:50,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-09-14 12:47:50,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 166. [2020-09-14 12:47:50,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-14 12:47:50,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 424 transitions. [2020-09-14 12:47:50,679 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 424 transitions. Word has length 14 [2020-09-14 12:47:50,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:47:50,679 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 424 transitions. [2020-09-14 12:47:50,679 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:47:50,679 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 424 transitions. [2020-09-14 12:47:50,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:47:50,679 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:47:50,679 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:47:50,880 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:47:50,880 INFO L427 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:47:50,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:47:50,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1289294092, now seen corresponding path program 230 times [2020-09-14 12:47:50,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:47:50,881 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627137615] [2020-09-14 12:47:50,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:47:50,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:47:51,173 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:47:51,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627137615] [2020-09-14 12:47:51,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84622394] [2020-09-14 12:47:51,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:47:51,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:47:51,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:47:51,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:47:51,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:47:51,595 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:47:51,629 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:47:51,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:47:51,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:47:51,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937333824] [2020-09-14 12:47:51,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:47:51,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:47:51,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:47:51,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:47:51,632 INFO L87 Difference]: Start difference. First operand 166 states and 424 transitions. Second operand 17 states. [2020-09-14 12:47:53,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:47:53,803 INFO L93 Difference]: Finished difference Result 285 states and 690 transitions. [2020-09-14 12:47:53,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-14 12:47:53,807 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:47:53,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:47:53,808 INFO L225 Difference]: With dead ends: 285 [2020-09-14 12:47:53,808 INFO L226 Difference]: Without dead ends: 277 [2020-09-14 12:47:53,808 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=482, Invalid=1240, Unknown=0, NotChecked=0, Total=1722 [2020-09-14 12:47:53,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-09-14 12:47:53,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 166. [2020-09-14 12:47:53,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-14 12:47:53,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 424 transitions. [2020-09-14 12:47:53,812 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 424 transitions. Word has length 14 [2020-09-14 12:47:53,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:47:53,812 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 424 transitions. [2020-09-14 12:47:53,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:47:53,813 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 424 transitions. [2020-09-14 12:47:53,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:47:53,813 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:47:53,813 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:47:54,018 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable263 [2020-09-14 12:47:54,018 INFO L427 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:47:54,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:47:54,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1289293131, now seen corresponding path program 231 times [2020-09-14 12:47:54,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:47:54,020 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280211430] [2020-09-14 12:47:54,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:47:54,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:47:54,337 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:47:54,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280211430] [2020-09-14 12:47:54,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499740089] [2020-09-14 12:47:54,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:47:54,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-14 12:47:54,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:47:54,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:47:54,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:47:54,810 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:47:54,931 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:47:54,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:47:54,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:47:54,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565070404] [2020-09-14 12:47:54,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:47:54,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:47:54,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:47:54,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:47:54,933 INFO L87 Difference]: Start difference. First operand 166 states and 424 transitions. Second operand 17 states. [2020-09-14 12:47:57,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:47:57,495 INFO L93 Difference]: Finished difference Result 307 states and 744 transitions. [2020-09-14 12:47:57,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-14 12:47:57,498 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:47:57,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:47:57,499 INFO L225 Difference]: With dead ends: 307 [2020-09-14 12:47:57,499 INFO L226 Difference]: Without dead ends: 299 [2020-09-14 12:47:57,499 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=480, Invalid=1160, Unknown=0, NotChecked=0, Total=1640 [2020-09-14 12:47:57,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-09-14 12:47:57,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 164. [2020-09-14 12:47:57,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-14 12:47:57,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 417 transitions. [2020-09-14 12:47:57,503 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 417 transitions. Word has length 14 [2020-09-14 12:47:57,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:47:57,503 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 417 transitions. [2020-09-14 12:47:57,503 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:47:57,503 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 417 transitions. [2020-09-14 12:47:57,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:47:57,503 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:47:57,503 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:47:57,704 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:47:57,704 INFO L427 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:47:57,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:47:57,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1289285660, now seen corresponding path program 232 times [2020-09-14 12:47:57,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:47:57,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607853628] [2020-09-14 12:47:57,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:47:57,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:47:57,946 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:47:57,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607853628] [2020-09-14 12:47:57,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165474140] [2020-09-14 12:47:57,947 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:47:58,001 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:47:58,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:47:58,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:47:58,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:47:58,397 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:47:58,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:47:58,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:47:58,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102516598] [2020-09-14 12:47:58,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:47:58,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:47:58,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:47:58,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:47:58,398 INFO L87 Difference]: Start difference. First operand 164 states and 417 transitions. Second operand 17 states. [2020-09-14 12:48:00,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:48:00,113 INFO L93 Difference]: Finished difference Result 280 states and 668 transitions. [2020-09-14 12:48:00,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-14 12:48:00,116 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:48:00,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:48:00,116 INFO L225 Difference]: With dead ends: 280 [2020-09-14 12:48:00,117 INFO L226 Difference]: Without dead ends: 278 [2020-09-14 12:48:00,117 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=412, Invalid=994, Unknown=0, NotChecked=0, Total=1406 [2020-09-14 12:48:00,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-09-14 12:48:00,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 166. [2020-09-14 12:48:00,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-14 12:48:00,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 424 transitions. [2020-09-14 12:48:00,120 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 424 transitions. Word has length 14 [2020-09-14 12:48:00,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:48:00,120 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 424 transitions. [2020-09-14 12:48:00,120 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:48:00,120 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 424 transitions. [2020-09-14 12:48:00,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:48:00,121 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:48:00,121 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:48:00,321 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2020-09-14 12:48:00,321 INFO L427 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:48:00,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:48:00,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1289264301, now seen corresponding path program 233 times [2020-09-14 12:48:00,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:48:00,323 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456382833] [2020-09-14 12:48:00,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:48:00,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:48:00,574 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:48:00,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456382833] [2020-09-14 12:48:00,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776841955] [2020-09-14 12:48:00,574 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:48:00,629 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-14 12:48:00,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:48:00,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:48:00,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:48:00,965 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:48:01,001 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:48:01,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:48:01,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:48:01,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836243155] [2020-09-14 12:48:01,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:48:01,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:48:01,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:48:01,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:48:01,003 INFO L87 Difference]: Start difference. First operand 166 states and 424 transitions. Second operand 17 states. [2020-09-14 12:48:03,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:48:03,129 INFO L93 Difference]: Finished difference Result 315 states and 764 transitions. [2020-09-14 12:48:03,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-14 12:48:03,133 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:48:03,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:48:03,134 INFO L225 Difference]: With dead ends: 315 [2020-09-14 12:48:03,134 INFO L226 Difference]: Without dead ends: 307 [2020-09-14 12:48:03,134 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=483, Invalid=1157, Unknown=0, NotChecked=0, Total=1640 [2020-09-14 12:48:03,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2020-09-14 12:48:03,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 164. [2020-09-14 12:48:03,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-14 12:48:03,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 414 transitions. [2020-09-14 12:48:03,138 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 414 transitions. Word has length 14 [2020-09-14 12:48:03,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:48:03,138 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 414 transitions. [2020-09-14 12:48:03,138 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:48:03,138 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 414 transitions. [2020-09-14 12:48:03,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:48:03,139 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:48:03,139 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:48:03,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable266,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:48:03,340 INFO L427 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:48:03,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:48:03,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1289263340, now seen corresponding path program 234 times [2020-09-14 12:48:03,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:48:03,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636040733] [2020-09-14 12:48:03,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:48:03,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:48:03,668 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:48:03,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636040733] [2020-09-14 12:48:03,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995907771] [2020-09-14 12:48:03,669 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:48:03,731 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-14 12:48:03,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:48:03,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:48:03,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:48:04,151 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:48:04,191 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:48:04,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:48:04,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:48:04,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512836597] [2020-09-14 12:48:04,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:48:04,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:48:04,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:48:04,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:48:04,192 INFO L87 Difference]: Start difference. First operand 164 states and 414 transitions. Second operand 17 states. [2020-09-14 12:48:06,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:48:06,902 INFO L93 Difference]: Finished difference Result 312 states and 754 transitions. [2020-09-14 12:48:06,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-14 12:48:06,906 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:48:06,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:48:06,907 INFO L225 Difference]: With dead ends: 312 [2020-09-14 12:48:06,907 INFO L226 Difference]: Without dead ends: 304 [2020-09-14 12:48:06,908 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=559, Invalid=1333, Unknown=0, NotChecked=0, Total=1892 [2020-09-14 12:48:06,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-09-14 12:48:06,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 157. [2020-09-14 12:48:06,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-09-14 12:48:06,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 391 transitions. [2020-09-14 12:48:06,911 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 391 transitions. Word has length 14 [2020-09-14 12:48:06,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:48:06,911 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 391 transitions. [2020-09-14 12:48:06,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:48:06,911 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 391 transitions. [2020-09-14 12:48:06,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:48:06,912 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:48:06,912 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:48:07,112 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2020-09-14 12:48:07,113 INFO L427 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:48:07,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:48:07,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1288370571, now seen corresponding path program 235 times [2020-09-14 12:48:07,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:48:07,114 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40749682] [2020-09-14 12:48:07,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:48:07,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:48:07,402 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:48:07,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40749682] [2020-09-14 12:48:07,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774723913] [2020-09-14 12:48:07,403 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:48:07,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:48:07,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:48:07,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:48:07,879 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:48:07,916 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:48:07,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:48:07,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:48:07,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555808356] [2020-09-14 12:48:07,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:48:07,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:48:07,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:48:07,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:48:07,918 INFO L87 Difference]: Start difference. First operand 157 states and 391 transitions. Second operand 17 states. [2020-09-14 12:48:11,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:48:11,027 INFO L93 Difference]: Finished difference Result 307 states and 730 transitions. [2020-09-14 12:48:11,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-14 12:48:11,030 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:48:11,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:48:11,031 INFO L225 Difference]: With dead ends: 307 [2020-09-14 12:48:11,031 INFO L226 Difference]: Without dead ends: 299 [2020-09-14 12:48:11,032 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=543, Invalid=1349, Unknown=0, NotChecked=0, Total=1892 [2020-09-14 12:48:11,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-09-14 12:48:11,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 155. [2020-09-14 12:48:11,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-09-14 12:48:11,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 381 transitions. [2020-09-14 12:48:11,035 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 381 transitions. Word has length 14 [2020-09-14 12:48:11,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:48:11,035 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 381 transitions. [2020-09-14 12:48:11,035 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:48:11,035 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 381 transitions. [2020-09-14 12:48:11,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:48:11,036 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:48:11,036 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:48:11,236 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable268,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:48:11,237 INFO L427 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:48:11,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:48:11,237 INFO L82 PathProgramCache]: Analyzing trace with hash -423000859, now seen corresponding path program 236 times [2020-09-14 12:48:11,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:48:11,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918524790] [2020-09-14 12:48:11,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:48:11,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:48:11,606 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:48:11,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918524790] [2020-09-14 12:48:11,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580328876] [2020-09-14 12:48:11,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:48:11,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:48:11,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:48:11,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:48:11,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:48:12,196 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:48:12,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:48:12,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:48:12,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359854910] [2020-09-14 12:48:12,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:48:12,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:48:12,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:48:12,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:48:12,198 INFO L87 Difference]: Start difference. First operand 155 states and 381 transitions. Second operand 17 states. [2020-09-14 12:48:13,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:48:13,026 INFO L93 Difference]: Finished difference Result 225 states and 519 transitions. [2020-09-14 12:48:13,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-14 12:48:13,030 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:48:13,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:48:13,031 INFO L225 Difference]: With dead ends: 225 [2020-09-14 12:48:13,031 INFO L226 Difference]: Without dead ends: 223 [2020-09-14 12:48:13,031 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2020-09-14 12:48:13,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-09-14 12:48:13,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 153. [2020-09-14 12:48:13,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-09-14 12:48:13,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 376 transitions. [2020-09-14 12:48:13,034 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 376 transitions. Word has length 14 [2020-09-14 12:48:13,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:48:13,034 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 376 transitions. [2020-09-14 12:48:13,034 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:48:13,034 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 376 transitions. [2020-09-14 12:48:13,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:48:13,035 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:48:13,035 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:48:13,235 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2020-09-14 12:48:13,236 INFO L427 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:48:13,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:48:13,236 INFO L82 PathProgramCache]: Analyzing trace with hash -401551339, now seen corresponding path program 237 times [2020-09-14 12:48:13,237 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:48:13,237 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998356388] [2020-09-14 12:48:13,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:48:13,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:48:13,526 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:48:13,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998356388] [2020-09-14 12:48:13,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628723958] [2020-09-14 12:48:13,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:48:13,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-14 12:48:13,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:48:13,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:48:13,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:48:14,028 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:48:14,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:48:14,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:48:14,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643506367] [2020-09-14 12:48:14,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:48:14,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:48:14,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:48:14,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:48:14,030 INFO L87 Difference]: Start difference. First operand 153 states and 376 transitions. Second operand 17 states. [2020-09-14 12:48:14,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:48:14,984 INFO L93 Difference]: Finished difference Result 223 states and 512 transitions. [2020-09-14 12:48:14,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-14 12:48:14,988 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:48:14,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:48:14,989 INFO L225 Difference]: With dead ends: 223 [2020-09-14 12:48:14,989 INFO L226 Difference]: Without dead ends: 221 [2020-09-14 12:48:14,989 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=204, Invalid=446, Unknown=0, NotChecked=0, Total=650 [2020-09-14 12:48:14,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-09-14 12:48:14,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 151. [2020-09-14 12:48:14,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-09-14 12:48:14,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 371 transitions. [2020-09-14 12:48:14,992 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 371 transitions. Word has length 14 [2020-09-14 12:48:14,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:48:14,992 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 371 transitions. [2020-09-14 12:48:14,992 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:48:14,992 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 371 transitions. [2020-09-14 12:48:14,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:48:14,993 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:48:14,993 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:48:15,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2020-09-14 12:48:15,194 INFO L427 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:48:15,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:48:15,194 INFO L82 PathProgramCache]: Analyzing trace with hash -400888249, now seen corresponding path program 238 times [2020-09-14 12:48:15,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:48:15,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362146240] [2020-09-14 12:48:15,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:48:15,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:48:15,513 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:48:15,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362146240] [2020-09-14 12:48:15,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969058532] [2020-09-14 12:48:15,514 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:48:15,568 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:48:15,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:48:15,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:48:15,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:48:16,153 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:48:16,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:48:16,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:48:16,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439577580] [2020-09-14 12:48:16,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:48:16,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:48:16,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:48:16,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:48:16,155 INFO L87 Difference]: Start difference. First operand 151 states and 371 transitions. Second operand 17 states. [2020-09-14 12:48:17,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:48:17,231 INFO L93 Difference]: Finished difference Result 221 states and 510 transitions. [2020-09-14 12:48:17,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-14 12:48:17,234 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:48:17,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:48:17,235 INFO L225 Difference]: With dead ends: 221 [2020-09-14 12:48:17,235 INFO L226 Difference]: Without dead ends: 219 [2020-09-14 12:48:17,236 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=229, Invalid=527, Unknown=0, NotChecked=0, Total=756 [2020-09-14 12:48:17,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-09-14 12:48:17,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 152. [2020-09-14 12:48:17,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-09-14 12:48:17,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 373 transitions. [2020-09-14 12:48:17,239 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 373 transitions. Word has length 14 [2020-09-14 12:48:17,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:48:17,239 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 373 transitions. [2020-09-14 12:48:17,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:48:17,239 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 373 transitions. [2020-09-14 12:48:17,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:48:17,240 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:48:17,240 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:48:17,440 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:48:17,441 INFO L427 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:48:17,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:48:17,441 INFO L82 PathProgramCache]: Analyzing trace with hash -400865929, now seen corresponding path program 239 times [2020-09-14 12:48:17,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:48:17,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713017353] [2020-09-14 12:48:17,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:48:17,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:48:17,735 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:48:17,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713017353] [2020-09-14 12:48:17,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69983669] [2020-09-14 12:48:17,736 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:48:17,793 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-14 12:48:17,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:48:17,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:48:17,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:48:18,394 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:48:20,600 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:48:20,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:48:20,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-09-14 12:48:20,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619219792] [2020-09-14 12:48:20,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-14 12:48:20,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:48:20,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-14 12:48:20,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=213, Unknown=1, NotChecked=0, Total=306 [2020-09-14 12:48:20,602 INFO L87 Difference]: Start difference. First operand 152 states and 373 transitions. Second operand 18 states. [2020-09-14 12:48:21,157 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 18 [2020-09-14 12:48:44,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:48:44,826 INFO L93 Difference]: Finished difference Result 252 states and 586 transitions. [2020-09-14 12:48:44,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-14 12:48:44,833 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-09-14 12:48:44,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:48:44,834 INFO L225 Difference]: With dead ends: 252 [2020-09-14 12:48:44,834 INFO L226 Difference]: Without dead ends: 247 [2020-09-14 12:48:44,834 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=334, Invalid=720, Unknown=2, NotChecked=0, Total=1056 [2020-09-14 12:48:44,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-09-14 12:48:44,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 150. [2020-09-14 12:48:44,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-09-14 12:48:44,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 366 transitions. [2020-09-14 12:48:44,836 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 366 transitions. Word has length 14 [2020-09-14 12:48:44,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:48:44,836 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 366 transitions. [2020-09-14 12:48:44,836 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-14 12:48:44,836 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 366 transitions. [2020-09-14 12:48:44,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:48:44,837 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:48:44,837 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:48:45,037 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,266 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:48:45,038 INFO L427 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:48:45,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:48:45,038 INFO L82 PathProgramCache]: Analyzing trace with hash -400837099, now seen corresponding path program 240 times [2020-09-14 12:48:45,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:48:45,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585021347] [2020-09-14 12:48:45,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:48:45,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:48:45,279 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:48:45,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585021347] [2020-09-14 12:48:45,280 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523724214] [2020-09-14 12:48:45,280 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:48:45,333 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-14 12:48:45,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:48:45,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:48:45,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:48:45,741 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:48:45,799 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:48:45,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:48:45,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:48:45,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690180784] [2020-09-14 12:48:45,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:48:45,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:48:45,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:48:45,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:48:45,801 INFO L87 Difference]: Start difference. First operand 150 states and 366 transitions. Second operand 17 states. [2020-09-14 12:48:47,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:48:47,274 INFO L93 Difference]: Finished difference Result 225 states and 522 transitions. [2020-09-14 12:48:47,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-14 12:48:47,278 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:48:47,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:48:47,278 INFO L225 Difference]: With dead ends: 225 [2020-09-14 12:48:47,279 INFO L226 Difference]: Without dead ends: 220 [2020-09-14 12:48:47,279 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-09-14 12:48:47,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-09-14 12:48:47,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 146. [2020-09-14 12:48:47,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-09-14 12:48:47,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 342 transitions. [2020-09-14 12:48:47,282 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 342 transitions. Word has length 14 [2020-09-14 12:48:47,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:48:47,282 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 342 transitions. [2020-09-14 12:48:47,283 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:48:47,283 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 342 transitions. [2020-09-14 12:48:47,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:48:47,283 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:48:47,283 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:48:47,483 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:48:47,484 INFO L427 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:48:47,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:48:47,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1019616642, now seen corresponding path program 7 times [2020-09-14 12:48:47,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:48:47,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991463301] [2020-09-14 12:48:47,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:48:47,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:48:47,850 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:48:47,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991463301] [2020-09-14 12:48:47,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036149099] [2020-09-14 12:48:47,851 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:48:47,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:48:47,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:48:47,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:48:48,454 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:48:48,550 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:48:48,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:48:48,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-09-14 12:48:48,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388473619] [2020-09-14 12:48:48,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-14 12:48:48,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:48:48,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-14 12:48:48,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2020-09-14 12:48:48,552 INFO L87 Difference]: Start difference. First operand 146 states and 342 transitions. Second operand 20 states. [2020-09-14 12:48:49,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:48:49,215 INFO L93 Difference]: Finished difference Result 206 states and 480 transitions. [2020-09-14 12:48:49,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-14 12:48:49,217 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 14 [2020-09-14 12:48:49,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:48:49,218 INFO L225 Difference]: With dead ends: 206 [2020-09-14 12:48:49,218 INFO L226 Difference]: Without dead ends: 201 [2020-09-14 12:48:49,218 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2020-09-14 12:48:49,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-09-14 12:48:49,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 156. [2020-09-14 12:48:49,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-09-14 12:48:49,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 383 transitions. [2020-09-14 12:48:49,222 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 383 transitions. Word has length 14 [2020-09-14 12:48:49,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:48:49,222 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 383 transitions. [2020-09-14 12:48:49,222 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-14 12:48:49,222 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 383 transitions. [2020-09-14 12:48:49,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:48:49,222 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:48:49,222 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:48:49,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,268 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:48:49,423 INFO L427 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:48:49,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:48:49,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1046764459, now seen corresponding path program 28 times [2020-09-14 12:48:49,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:48:49,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136550518] [2020-09-14 12:48:49,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:48:49,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:48:49,899 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:48:49,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136550518] [2020-09-14 12:48:49,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850543140] [2020-09-14 12:48:49,900 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:48:49,954 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:48:49,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:48:49,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:48:49,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:48:50,523 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:48:50,524 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:48:50,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-14 12:48:50,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772090327] [2020-09-14 12:48:50,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:48:50,524 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:48:50,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:48:50,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:48:50,525 INFO L87 Difference]: Start difference. First operand 156 states and 383 transitions. Second operand 19 states. [2020-09-14 12:48:50,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:48:50,712 INFO L93 Difference]: Finished difference Result 204 states and 479 transitions. [2020-09-14 12:48:50,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-14 12:48:50,715 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 14 [2020-09-14 12:48:50,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:48:50,715 INFO L225 Difference]: With dead ends: 204 [2020-09-14 12:48:50,716 INFO L226 Difference]: Without dead ends: 201 [2020-09-14 12:48:50,716 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:48:50,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-09-14 12:48:50,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 167. [2020-09-14 12:48:50,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-14 12:48:50,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 409 transitions. [2020-09-14 12:48:50,719 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 409 transitions. Word has length 14 [2020-09-14 12:48:50,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:48:50,720 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 409 transitions. [2020-09-14 12:48:50,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:48:50,720 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 409 transitions. [2020-09-14 12:48:50,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:48:50,720 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:48:50,720 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:48:50,921 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable275 [2020-09-14 12:48:50,921 INFO L427 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:48:50,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:48:50,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1739755227, now seen corresponding path program 29 times [2020-09-14 12:48:50,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:48:50,922 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393504395] [2020-09-14 12:48:50,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:48:50,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:48:51,373 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:48:51,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393504395] [2020-09-14 12:48:51,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485299299] [2020-09-14 12:48:51,374 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:48:51,428 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-14 12:48:51,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:48:51,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:48:51,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:48:51,914 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:48:51,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:48:51,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-14 12:48:51,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827824103] [2020-09-14 12:48:51,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:48:51,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:48:51,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:48:51,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:48:51,915 INFO L87 Difference]: Start difference. First operand 167 states and 409 transitions. Second operand 19 states. [2020-09-14 12:48:52,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:48:52,125 INFO L93 Difference]: Finished difference Result 224 states and 518 transitions. [2020-09-14 12:48:52,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-14 12:48:52,127 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 14 [2020-09-14 12:48:52,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:48:52,128 INFO L225 Difference]: With dead ends: 224 [2020-09-14 12:48:52,128 INFO L226 Difference]: Without dead ends: 221 [2020-09-14 12:48:52,129 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2020-09-14 12:48:52,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-09-14 12:48:52,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 167. [2020-09-14 12:48:52,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-14 12:48:52,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 409 transitions. [2020-09-14 12:48:52,132 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 409 transitions. Word has length 14 [2020-09-14 12:48:52,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:48:52,132 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 409 transitions. [2020-09-14 12:48:52,132 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:48:52,132 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 409 transitions. [2020-09-14 12:48:52,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:48:52,132 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:48:52,132 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:48:52,333 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable276,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:48:52,333 INFO L427 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:48:52,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:48:52,334 INFO L82 PathProgramCache]: Analyzing trace with hash 792278443, now seen corresponding path program 30 times [2020-09-14 12:48:52,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:48:52,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295573094] [2020-09-14 12:48:52,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:48:52,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:48:52,810 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:48:52,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295573094] [2020-09-14 12:48:52,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460692089] [2020-09-14 12:48:52,811 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:48:52,866 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-14 12:48:52,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:48:52,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:48:52,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:48:53,397 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:48:53,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:48:53,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-14 12:48:53,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133874167] [2020-09-14 12:48:53,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:48:53,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:48:53,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:48:53,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:48:53,399 INFO L87 Difference]: Start difference. First operand 167 states and 409 transitions. Second operand 19 states. [2020-09-14 12:48:53,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:48:53,689 INFO L93 Difference]: Finished difference Result 223 states and 518 transitions. [2020-09-14 12:48:53,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-14 12:48:53,691 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 14 [2020-09-14 12:48:53,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:48:53,692 INFO L225 Difference]: With dead ends: 223 [2020-09-14 12:48:53,692 INFO L226 Difference]: Without dead ends: 220 [2020-09-14 12:48:53,693 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=119, Invalid=301, Unknown=0, NotChecked=0, Total=420 [2020-09-14 12:48:53,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-09-14 12:48:53,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 168. [2020-09-14 12:48:53,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-09-14 12:48:53,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 414 transitions. [2020-09-14 12:48:53,695 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 414 transitions. Word has length 14 [2020-09-14 12:48:53,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:48:53,695 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 414 transitions. [2020-09-14 12:48:53,695 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:48:53,695 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 414 transitions. [2020-09-14 12:48:53,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:48:53,696 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:48:53,696 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:48:53,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2020-09-14 12:48:53,897 INFO L427 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:48:53,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:48:53,897 INFO L82 PathProgramCache]: Analyzing trace with hash -69569317, now seen corresponding path program 31 times [2020-09-14 12:48:53,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:48:53,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357810909] [2020-09-14 12:48:53,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:48:53,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:48:54,270 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:48:54,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357810909] [2020-09-14 12:48:54,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311219093] [2020-09-14 12:48:54,271 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:48:54,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:48:54,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:48:54,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:48:54,810 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:48:54,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:48:54,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-14 12:48:54,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719612997] [2020-09-14 12:48:54,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:48:54,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:48:54,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:48:54,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:48:54,811 INFO L87 Difference]: Start difference. First operand 168 states and 414 transitions. Second operand 19 states. [2020-09-14 12:48:55,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:48:55,226 INFO L93 Difference]: Finished difference Result 222 states and 518 transitions. [2020-09-14 12:48:55,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-14 12:48:55,228 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 14 [2020-09-14 12:48:55,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:48:55,229 INFO L225 Difference]: With dead ends: 222 [2020-09-14 12:48:55,229 INFO L226 Difference]: Without dead ends: 219 [2020-09-14 12:48:55,230 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-09-14 12:48:55,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-09-14 12:48:55,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 169. [2020-09-14 12:48:55,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-14 12:48:55,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 419 transitions. [2020-09-14 12:48:55,232 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 419 transitions. Word has length 14 [2020-09-14 12:48:55,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:48:55,232 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 419 transitions. [2020-09-14 12:48:55,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:48:55,233 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 419 transitions. [2020-09-14 12:48:55,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:48:55,233 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:48:55,233 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:48:55,433 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable278,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:48:55,434 INFO L427 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:48:55,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:48:55,434 INFO L82 PathProgramCache]: Analyzing trace with hash 595365803, now seen corresponding path program 32 times [2020-09-14 12:48:55,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:48:55,435 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483898057] [2020-09-14 12:48:55,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:48:55,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:48:55,797 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:48:55,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483898057] [2020-09-14 12:48:55,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409460364] [2020-09-14 12:48:55,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:48:55,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:48:55,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:48:55,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:48:55,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:48:56,331 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:48:56,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:48:56,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-14 12:48:56,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288189936] [2020-09-14 12:48:56,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:48:56,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:48:56,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:48:56,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:48:56,332 INFO L87 Difference]: Start difference. First operand 169 states and 419 transitions. Second operand 19 states. [2020-09-14 12:48:56,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:48:56,771 INFO L93 Difference]: Finished difference Result 221 states and 518 transitions. [2020-09-14 12:48:56,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-14 12:48:56,776 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 14 [2020-09-14 12:48:56,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:48:56,777 INFO L225 Difference]: With dead ends: 221 [2020-09-14 12:48:56,777 INFO L226 Difference]: Without dead ends: 218 [2020-09-14 12:48:56,782 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2020-09-14 12:48:56,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-09-14 12:48:56,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 170. [2020-09-14 12:48:56,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-09-14 12:48:56,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 424 transitions. [2020-09-14 12:48:56,785 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 424 transitions. Word has length 14 [2020-09-14 12:48:56,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:48:56,786 INFO L479 AbstractCegarLoop]: Abstraction has 170 states and 424 transitions. [2020-09-14 12:48:56,786 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:48:56,786 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 424 transitions. [2020-09-14 12:48:56,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:48:56,786 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:48:56,787 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:48:56,987 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2020-09-14 12:48:56,988 INFO L427 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:48:56,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:48:56,988 INFO L82 PathProgramCache]: Analyzing trace with hash 616815323, now seen corresponding path program 33 times [2020-09-14 12:48:56,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:48:56,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293736120] [2020-09-14 12:48:56,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:48:56,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:48:57,375 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:48:57,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293736120] [2020-09-14 12:48:57,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593083259] [2020-09-14 12:48:57,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:48:57,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-14 12:48:57,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:48:57,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:48:57,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:48:58,006 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:48:58,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:48:58,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-14 12:48:58,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26071992] [2020-09-14 12:48:58,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:48:58,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:48:58,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:48:58,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:48:58,007 INFO L87 Difference]: Start difference. First operand 170 states and 424 transitions. Second operand 19 states. [2020-09-14 12:48:58,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:48:58,604 INFO L93 Difference]: Finished difference Result 220 states and 518 transitions. [2020-09-14 12:48:58,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-14 12:48:58,606 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 14 [2020-09-14 12:48:58,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:48:58,607 INFO L225 Difference]: With dead ends: 220 [2020-09-14 12:48:58,607 INFO L226 Difference]: Without dead ends: 217 [2020-09-14 12:48:58,608 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=167, Invalid=385, Unknown=0, NotChecked=0, Total=552 [2020-09-14 12:48:58,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-09-14 12:48:58,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 172. [2020-09-14 12:48:58,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-09-14 12:48:58,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 431 transitions. [2020-09-14 12:48:58,611 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 431 transitions. Word has length 14 [2020-09-14 12:48:58,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:48:58,612 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 431 transitions. [2020-09-14 12:48:58,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:48:58,612 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 431 transitions. [2020-09-14 12:48:58,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:48:58,613 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:48:58,613 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:48:58,813 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:48:58,814 INFO L427 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:48:58,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:48:58,814 INFO L82 PathProgramCache]: Analyzing trace with hash 617507243, now seen corresponding path program 34 times [2020-09-14 12:48:58,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:48:58,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762446571] [2020-09-14 12:48:58,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:48:58,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:48:59,123 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:48:59,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762446571] [2020-09-14 12:48:59,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884394311] [2020-09-14 12:48:59,124 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:48:59,177 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:48:59,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:48:59,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:48:59,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:48:59,768 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:48:59,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:48:59,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-14 12:48:59,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478774835] [2020-09-14 12:48:59,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:48:59,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:48:59,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:48:59,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:48:59,770 INFO L87 Difference]: Start difference. First operand 172 states and 431 transitions. Second operand 19 states. [2020-09-14 12:49:00,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:49:00,320 INFO L93 Difference]: Finished difference Result 219 states and 518 transitions. [2020-09-14 12:49:00,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-14 12:49:00,325 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 14 [2020-09-14 12:49:00,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:49:00,325 INFO L225 Difference]: With dead ends: 219 [2020-09-14 12:49:00,325 INFO L226 Difference]: Without dead ends: 216 [2020-09-14 12:49:00,326 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=189, Invalid=411, Unknown=0, NotChecked=0, Total=600 [2020-09-14 12:49:00,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-09-14 12:49:00,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 174. [2020-09-14 12:49:00,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-09-14 12:49:00,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 438 transitions. [2020-09-14 12:49:00,329 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 438 transitions. Word has length 14 [2020-09-14 12:49:00,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:49:00,330 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 438 transitions. [2020-09-14 12:49:00,330 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:49:00,330 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 438 transitions. [2020-09-14 12:49:00,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:49:00,330 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:49:00,330 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:49:00,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:49:00,531 INFO L427 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:49:00,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:49:00,532 INFO L82 PathProgramCache]: Analyzing trace with hash 617529563, now seen corresponding path program 35 times [2020-09-14 12:49:00,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:49:00,533 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761378023] [2020-09-14 12:49:00,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:49:00,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:49:00,873 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:49:00,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761378023] [2020-09-14 12:49:00,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630710140] [2020-09-14 12:49:00,874 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:49:00,926 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-14 12:49:00,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:49:00,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:49:00,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:49:01,473 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:49:01,513 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:49:01,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:49:01,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-14 12:49:01,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022613158] [2020-09-14 12:49:01,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:49:01,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:49:01,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:49:01,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:49:01,514 INFO L87 Difference]: Start difference. First operand 174 states and 438 transitions. Second operand 19 states. [2020-09-14 12:49:02,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:49:02,278 INFO L93 Difference]: Finished difference Result 228 states and 542 transitions. [2020-09-14 12:49:02,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-14 12:49:02,280 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 14 [2020-09-14 12:49:02,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:49:02,281 INFO L225 Difference]: With dead ends: 228 [2020-09-14 12:49:02,281 INFO L226 Difference]: Without dead ends: 222 [2020-09-14 12:49:02,281 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=223, Invalid=479, Unknown=0, NotChecked=0, Total=702 [2020-09-14 12:49:02,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-09-14 12:49:02,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 170. [2020-09-14 12:49:02,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-09-14 12:49:02,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 432 transitions. [2020-09-14 12:49:02,285 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 432 transitions. Word has length 14 [2020-09-14 12:49:02,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:49:02,285 INFO L479 AbstractCegarLoop]: Abstraction has 170 states and 432 transitions. [2020-09-14 12:49:02,285 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:49:02,285 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 432 transitions. [2020-09-14 12:49:02,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-14 12:49:02,286 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:49:02,286 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:49:02,494 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2020-09-14 12:49:02,494 INFO L427 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:49:02,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:49:02,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1771658259, now seen corresponding path program 241 times [2020-09-14 12:49:02,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:49:02,495 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185772436] [2020-09-14 12:49:02,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:49:02,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:49:02,889 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:49:02,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185772436] [2020-09-14 12:49:02,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727309209] [2020-09-14 12:49:02,890 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:49:02,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:49:02,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:49:02,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:49:03,556 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:49:03,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:49:03,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-14 12:49:03,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905439970] [2020-09-14 12:49:03,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:49:03,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:49:03,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:49:03,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:49:03,557 INFO L87 Difference]: Start difference. First operand 170 states and 432 transitions. Second operand 19 states. [2020-09-14 12:49:03,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:49:03,773 INFO L93 Difference]: Finished difference Result 213 states and 518 transitions. [2020-09-14 12:49:03,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-14 12:49:03,777 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-14 12:49:03,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:49:03,777 INFO L225 Difference]: With dead ends: 213 [2020-09-14 12:49:03,777 INFO L226 Difference]: Without dead ends: 211 [2020-09-14 12:49:03,778 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:49:03,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-09-14 12:49:03,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 180. [2020-09-14 12:49:03,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-09-14 12:49:03,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 462 transitions. [2020-09-14 12:49:03,782 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 462 transitions. Word has length 15 [2020-09-14 12:49:03,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:49:03,782 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 462 transitions. [2020-09-14 12:49:03,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:49:03,782 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 462 transitions. [2020-09-14 12:49:03,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-14 12:49:03,782 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:49:03,783 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:49:03,983 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:49:03,984 INFO L427 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:49:03,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:49:03,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1771657298, now seen corresponding path program 242 times [2020-09-14 12:49:03,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:49:03,984 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579116532] [2020-09-14 12:49:03,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:49:03,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:49:04,381 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:49:04,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579116532] [2020-09-14 12:49:04,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189396527] [2020-09-14 12:49:04,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:49:04,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:49:04,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:49:04,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:49:04,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:49:04,957 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:49:04,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:49:04,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-14 12:49:04,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703394257] [2020-09-14 12:49:04,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:49:04,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:49:04,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:49:04,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:49:04,958 INFO L87 Difference]: Start difference. First operand 180 states and 462 transitions. Second operand 19 states. [2020-09-14 12:49:05,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:49:05,735 INFO L93 Difference]: Finished difference Result 226 states and 544 transitions. [2020-09-14 12:49:05,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-14 12:49:05,739 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-14 12:49:05,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:49:05,739 INFO L225 Difference]: With dead ends: 226 [2020-09-14 12:49:05,739 INFO L226 Difference]: Without dead ends: 224 [2020-09-14 12:49:05,740 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=194, Invalid=406, Unknown=0, NotChecked=0, Total=600 [2020-09-14 12:49:05,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-09-14 12:49:05,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 178. [2020-09-14 12:49:05,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-09-14 12:49:05,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 456 transitions. [2020-09-14 12:49:05,743 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 456 transitions. Word has length 15 [2020-09-14 12:49:05,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:49:05,743 INFO L479 AbstractCegarLoop]: Abstraction has 178 states and 456 transitions. [2020-09-14 12:49:05,743 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:49:05,743 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 456 transitions. [2020-09-14 12:49:05,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-14 12:49:05,744 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:49:05,744 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:49:05,944 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,278 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:49:05,945 INFO L427 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:49:05,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:49:05,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1771628468, now seen corresponding path program 243 times [2020-09-14 12:49:05,946 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:49:05,946 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952572462] [2020-09-14 12:49:05,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:49:05,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:49:06,368 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:49:06,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952572462] [2020-09-14 12:49:06,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482018870] [2020-09-14 12:49:06,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:49:06,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-14 12:49:06,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:49:06,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:49:06,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:49:07,305 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:49:07,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:49:07,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-14 12:49:07,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774269322] [2020-09-14 12:49:07,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:49:07,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:49:07,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:49:07,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:49:07,307 INFO L87 Difference]: Start difference. First operand 178 states and 456 transitions. Second operand 19 states. [2020-09-14 12:49:08,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:49:08,272 INFO L93 Difference]: Finished difference Result 241 states and 574 transitions. [2020-09-14 12:49:08,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-14 12:49:08,274 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-14 12:49:08,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:49:08,274 INFO L225 Difference]: With dead ends: 241 [2020-09-14 12:49:08,274 INFO L226 Difference]: Without dead ends: 239 [2020-09-14 12:49:08,275 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=221, Invalid=429, Unknown=0, NotChecked=0, Total=650 [2020-09-14 12:49:08,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-09-14 12:49:08,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 176. [2020-09-14 12:49:08,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-09-14 12:49:08,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 450 transitions. [2020-09-14 12:49:08,282 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 450 transitions. Word has length 15 [2020-09-14 12:49:08,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:49:08,282 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 450 transitions. [2020-09-14 12:49:08,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:49:08,282 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 450 transitions. [2020-09-14 12:49:08,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-14 12:49:08,283 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:49:08,283 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:49:08,483 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:49:08,484 INFO L427 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:49:08,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:49:08,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1770734738, now seen corresponding path program 244 times [2020-09-14 12:49:08,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:49:08,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152553897] [2020-09-14 12:49:08,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:49:08,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:49:08,856 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:49:08,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152553897] [2020-09-14 12:49:08,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192286229] [2020-09-14 12:49:08,857 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:49:08,917 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:49:08,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:49:08,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:49:08,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:49:09,600 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:49:09,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:49:09,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-14 12:49:09,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386622413] [2020-09-14 12:49:09,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:49:09,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:49:09,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:49:09,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:49:09,601 INFO L87 Difference]: Start difference. First operand 176 states and 450 transitions. Second operand 19 states. [2020-09-14 12:49:10,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:49:10,733 INFO L93 Difference]: Finished difference Result 243 states and 578 transitions. [2020-09-14 12:49:10,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-14 12:49:10,738 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-14 12:49:10,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:49:10,739 INFO L225 Difference]: With dead ends: 243 [2020-09-14 12:49:10,739 INFO L226 Difference]: Without dead ends: 241 [2020-09-14 12:49:10,739 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=244, Invalid=458, Unknown=0, NotChecked=0, Total=702 [2020-09-14 12:49:10,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-09-14 12:49:10,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 178. [2020-09-14 12:49:10,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-09-14 12:49:10,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 456 transitions. [2020-09-14 12:49:10,743 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 456 transitions. Word has length 15 [2020-09-14 12:49:10,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:49:10,743 INFO L479 AbstractCegarLoop]: Abstraction has 178 states and 456 transitions. [2020-09-14 12:49:10,743 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:49:10,743 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 456 transitions. [2020-09-14 12:49:10,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-14 12:49:10,744 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:49:10,744 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:49:10,944 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:49:10,944 INFO L427 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:49:10,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:49:10,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1770733777, now seen corresponding path program 245 times [2020-09-14 12:49:10,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:49:10,946 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056550677] [2020-09-14 12:49:10,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:49:10,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:49:11,219 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:49:11,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056550677] [2020-09-14 12:49:11,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129888671] [2020-09-14 12:49:11,220 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:49:11,273 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-14 12:49:11,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:49:11,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:49:11,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:49:16,475 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:49:16,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:49:16,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-14 12:49:16,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930473609] [2020-09-14 12:49:16,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:49:16,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:49:16,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:49:16,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=236, Unknown=1, NotChecked=0, Total=342 [2020-09-14 12:49:16,477 INFO L87 Difference]: Start difference. First operand 178 states and 456 transitions. Second operand 19 states. [2020-09-14 12:49:20,977 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2020-09-14 12:49:21,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:49:21,706 INFO L93 Difference]: Finished difference Result 253 states and 599 transitions. [2020-09-14 12:49:21,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-14 12:49:21,711 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-14 12:49:21,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:49:21,711 INFO L225 Difference]: With dead ends: 253 [2020-09-14 12:49:21,711 INFO L226 Difference]: Without dead ends: 251 [2020-09-14 12:49:21,712 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=231, Invalid=470, Unknown=1, NotChecked=0, Total=702 [2020-09-14 12:49:21,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-09-14 12:49:21,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 177. [2020-09-14 12:49:21,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-09-14 12:49:21,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 453 transitions. [2020-09-14 12:49:21,715 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 453 transitions. Word has length 15 [2020-09-14 12:49:21,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:49:21,715 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 453 transitions. [2020-09-14 12:49:21,715 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:49:21,715 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 453 transitions. [2020-09-14 12:49:21,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-14 12:49:21,715 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:49:21,715 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:49:21,916 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2020-09-14 12:49:21,916 INFO L427 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:49:21,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:49:21,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1770704947, now seen corresponding path program 246 times [2020-09-14 12:49:21,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:49:21,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524986642] [2020-09-14 12:49:21,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:49:21,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:49:22,286 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:49:22,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524986642] [2020-09-14 12:49:22,287 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557177936] [2020-09-14 12:49:22,287 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:49:22,347 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-14 12:49:22,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:49:22,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:49:22,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:49:23,007 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:49:23,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:49:23,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-14 12:49:23,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821231840] [2020-09-14 12:49:23,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:49:23,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:49:23,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:49:23,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:49:23,008 INFO L87 Difference]: Start difference. First operand 177 states and 453 transitions. Second operand 19 states. [2020-09-14 12:49:24,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:49:24,038 INFO L93 Difference]: Finished difference Result 247 states and 589 transitions. [2020-09-14 12:49:24,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-14 12:49:24,040 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-14 12:49:24,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:49:24,041 INFO L225 Difference]: With dead ends: 247 [2020-09-14 12:49:24,041 INFO L226 Difference]: Without dead ends: 245 [2020-09-14 12:49:24,042 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=242, Invalid=460, Unknown=0, NotChecked=0, Total=702 [2020-09-14 12:49:24,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-09-14 12:49:24,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 174. [2020-09-14 12:49:24,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-09-14 12:49:24,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 444 transitions. [2020-09-14 12:49:24,045 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 444 transitions. Word has length 15 [2020-09-14 12:49:24,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:49:24,045 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 444 transitions. [2020-09-14 12:49:24,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:49:24,045 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 444 transitions. [2020-09-14 12:49:24,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-14 12:49:24,045 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:49:24,046 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:49:24,246 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2020-09-14 12:49:24,247 INFO L427 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:49:24,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:49:24,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1743029108, now seen corresponding path program 247 times [2020-09-14 12:49:24,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:49:24,248 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201771889] [2020-09-14 12:49:24,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:49:24,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:49:24,604 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:49:24,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201771889] [2020-09-14 12:49:24,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431777264] [2020-09-14 12:49:24,605 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:49:24,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:49:24,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:49:24,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:49:31,319 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:49:31,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:49:31,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-14 12:49:31,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130399351] [2020-09-14 12:49:31,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:49:31,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:49:31,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:49:31,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:49:31,321 INFO L87 Difference]: Start difference. First operand 174 states and 444 transitions. Second operand 19 states. [2020-09-14 12:49:32,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:49:32,792 INFO L93 Difference]: Finished difference Result 245 states and 582 transitions. [2020-09-14 12:49:32,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-14 12:49:32,795 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-14 12:49:32,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:49:32,796 INFO L225 Difference]: With dead ends: 245 [2020-09-14 12:49:32,796 INFO L226 Difference]: Without dead ends: 243 [2020-09-14 12:49:32,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=275, Invalid=537, Unknown=0, NotChecked=0, Total=812 [2020-09-14 12:49:32,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-09-14 12:49:32,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 177. [2020-09-14 12:49:32,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-09-14 12:49:32,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 453 transitions. [2020-09-14 12:49:32,800 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 453 transitions. Word has length 15 [2020-09-14 12:49:32,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:49:32,800 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 453 transitions. [2020-09-14 12:49:32,800 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:49:32,800 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 453 transitions. [2020-09-14 12:49:32,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-14 12:49:32,801 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:49:32,801 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:49:33,001 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2020-09-14 12:49:33,001 INFO L427 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:49:33,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:49:33,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1743028147, now seen corresponding path program 248 times [2020-09-14 12:49:33,002 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:49:33,003 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412458946] [2020-09-14 12:49:33,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:49:33,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:49:33,341 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:49:33,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412458946] [2020-09-14 12:49:33,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271971791] [2020-09-14 12:49:33,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:49:33,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:49:33,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:49:33,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:49:33,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:49:38,434 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-09-14 12:49:43,293 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:49:43,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:49:43,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-14 12:49:43,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719475673] [2020-09-14 12:49:43,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:49:43,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:49:43,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:49:43,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=237, Unknown=2, NotChecked=0, Total=342 [2020-09-14 12:49:43,295 INFO L87 Difference]: Start difference. First operand 177 states and 453 transitions. Second operand 19 states. [2020-09-14 12:49:43,830 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 20 [2020-09-14 12:49:44,005 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 16 [2020-09-14 12:49:44,571 WARN L193 SmtUtils]: Spent 453.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-09-14 12:49:46,311 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2020-09-14 12:49:48,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:49:48,504 INFO L93 Difference]: Finished difference Result 251 states and 595 transitions. [2020-09-14 12:49:48,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-14 12:49:48,508 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-14 12:49:48,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:49:48,508 INFO L225 Difference]: With dead ends: 251 [2020-09-14 12:49:48,509 INFO L226 Difference]: Without dead ends: 249 [2020-09-14 12:49:48,509 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=248, Invalid=506, Unknown=2, NotChecked=0, Total=756 [2020-09-14 12:49:48,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-09-14 12:49:48,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 176. [2020-09-14 12:49:48,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-09-14 12:49:48,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 450 transitions. [2020-09-14 12:49:48,512 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 450 transitions. Word has length 15 [2020-09-14 12:49:48,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:49:48,512 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 450 transitions. [2020-09-14 12:49:48,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:49:48,512 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 450 transitions. [2020-09-14 12:49:48,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-14 12:49:48,512 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:49:48,512 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:49:48,713 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:49:48,713 INFO L427 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:49:48,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:49:48,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1742999317, now seen corresponding path program 249 times [2020-09-14 12:49:48,714 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:49:48,715 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393026005] [2020-09-14 12:49:48,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:49:48,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:49:49,080 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:49:49,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393026005] [2020-09-14 12:49:49,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611181546] [2020-09-14 12:49:49,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:49:49,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-14 12:49:49,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:49:49,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:49:49,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:50:09,284 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:50:09,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:50:09,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-14 12:50:09,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508210855] [2020-09-14 12:50:09,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:50:09,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:50:09,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:50:09,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=230, Unknown=7, NotChecked=0, Total=342 [2020-09-14 12:50:09,285 INFO L87 Difference]: Start difference. First operand 176 states and 450 transitions. Second operand 19 states. [2020-09-14 12:50:13,725 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-09-14 12:50:28,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:50:28,169 INFO L93 Difference]: Finished difference Result 254 states and 602 transitions. [2020-09-14 12:50:28,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-14 12:50:28,173 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-14 12:50:28,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:50:28,174 INFO L225 Difference]: With dead ends: 254 [2020-09-14 12:50:28,174 INFO L226 Difference]: Without dead ends: 252 [2020-09-14 12:50:28,174 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 31.6s TimeCoverageRelationStatistics Valid=253, Invalid=493, Unknown=10, NotChecked=0, Total=756 [2020-09-14 12:50:28,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-09-14 12:50:28,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 177. [2020-09-14 12:50:28,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-09-14 12:50:28,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 453 transitions. [2020-09-14 12:50:28,177 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 453 transitions. Word has length 15 [2020-09-14 12:50:28,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:50:28,177 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 453 transitions. [2020-09-14 12:50:28,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:50:28,177 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 453 transitions. [2020-09-14 12:50:28,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-14 12:50:28,178 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:50:28,178 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:50:28,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable291 [2020-09-14 12:50:28,379 INFO L427 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:50:28,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:50:28,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1742104626, now seen corresponding path program 250 times [2020-09-14 12:50:28,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:50:28,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611020837] [2020-09-14 12:50:28,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:50:28,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:50:28,822 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:50:28,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611020837] [2020-09-14 12:50:28,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632730798] [2020-09-14 12:50:28,823 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:50:28,884 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:50:28,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:50:28,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:50:28,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:50:33,392 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:50:33,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:50:33,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-14 12:50:33,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053970203] [2020-09-14 12:50:33,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:50:33,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:50:33,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:50:33,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:50:33,394 INFO L87 Difference]: Start difference. First operand 177 states and 453 transitions. Second operand 19 states. [2020-09-14 12:50:34,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:50:34,935 INFO L93 Difference]: Finished difference Result 256 states and 605 transitions. [2020-09-14 12:50:34,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-14 12:50:34,940 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-14 12:50:34,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:50:34,941 INFO L225 Difference]: With dead ends: 256 [2020-09-14 12:50:34,941 INFO L226 Difference]: Without dead ends: 254 [2020-09-14 12:50:34,941 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=246, Invalid=510, Unknown=0, NotChecked=0, Total=756 [2020-09-14 12:50:34,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-09-14 12:50:34,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 172. [2020-09-14 12:50:34,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-09-14 12:50:34,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 438 transitions. [2020-09-14 12:50:34,944 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 438 transitions. Word has length 15 [2020-09-14 12:50:34,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:50:34,944 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 438 transitions. [2020-09-14 12:50:34,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:50:34,945 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 438 transitions. [2020-09-14 12:50:34,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-14 12:50:34,945 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:50:34,945 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:50:35,146 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable292 [2020-09-14 12:50:35,146 INFO L427 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:50:35,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:50:35,147 INFO L82 PathProgramCache]: Analyzing trace with hash -884154578, now seen corresponding path program 251 times [2020-09-14 12:50:35,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:50:35,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55799444] [2020-09-14 12:50:35,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:50:35,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:50:35,583 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:50:35,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55799444] [2020-09-14 12:50:35,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851457244] [2020-09-14 12:50:35,584 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:50:35,639 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-14 12:50:35,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:50:35,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:50:35,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:50:36,331 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:50:36,332 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:50:36,332 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-14 12:50:36,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595343776] [2020-09-14 12:50:36,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:50:36,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:50:36,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:50:36,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:50:36,333 INFO L87 Difference]: Start difference. First operand 172 states and 438 transitions. Second operand 19 states. [2020-09-14 12:50:37,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:50:37,891 INFO L93 Difference]: Finished difference Result 247 states and 586 transitions. [2020-09-14 12:50:37,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-14 12:50:37,896 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-14 12:50:37,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:50:37,897 INFO L225 Difference]: With dead ends: 247 [2020-09-14 12:50:37,897 INFO L226 Difference]: Without dead ends: 245 [2020-09-14 12:50:37,897 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=307, Invalid=623, Unknown=0, NotChecked=0, Total=930 [2020-09-14 12:50:37,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-09-14 12:50:37,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 176. [2020-09-14 12:50:37,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-09-14 12:50:37,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 450 transitions. [2020-09-14 12:50:37,901 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 450 transitions. Word has length 15 [2020-09-14 12:50:37,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:50:37,901 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 450 transitions. [2020-09-14 12:50:37,901 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:50:37,901 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 450 transitions. [2020-09-14 12:50:37,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-14 12:50:37,901 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:50:37,901 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:50:38,102 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:50:38,102 INFO L427 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:50:38,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:50:38,103 INFO L82 PathProgramCache]: Analyzing trace with hash -884153617, now seen corresponding path program 252 times [2020-09-14 12:50:38,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:50:38,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504294286] [2020-09-14 12:50:38,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:50:38,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:50:38,533 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:50:38,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504294286] [2020-09-14 12:50:38,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957556683] [2020-09-14 12:50:38,534 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:50:38,589 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-14 12:50:38,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:50:38,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:50:38,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:50:39,240 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:50:39,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:50:39,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-14 12:50:39,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299747795] [2020-09-14 12:50:39,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:50:39,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:50:39,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:50:39,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:50:39,242 INFO L87 Difference]: Start difference. First operand 176 states and 450 transitions. Second operand 19 states. [2020-09-14 12:50:40,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:50:40,473 INFO L93 Difference]: Finished difference Result 253 states and 599 transitions. [2020-09-14 12:50:40,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-14 12:50:40,476 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-14 12:50:40,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:50:40,477 INFO L225 Difference]: With dead ends: 253 [2020-09-14 12:50:40,478 INFO L226 Difference]: Without dead ends: 251 [2020-09-14 12:50:40,478 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=274, Invalid=596, Unknown=0, NotChecked=0, Total=870 [2020-09-14 12:50:40,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-09-14 12:50:40,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 175. [2020-09-14 12:50:40,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-09-14 12:50:40,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 447 transitions. [2020-09-14 12:50:40,481 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 447 transitions. Word has length 15 [2020-09-14 12:50:40,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:50:40,481 INFO L479 AbstractCegarLoop]: Abstraction has 175 states and 447 transitions. [2020-09-14 12:50:40,481 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:50:40,482 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 447 transitions. [2020-09-14 12:50:40,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-14 12:50:40,482 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:50:40,482 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:50:40,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:50:40,683 INFO L427 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:50:40,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:50:40,683 INFO L82 PathProgramCache]: Analyzing trace with hash -884124787, now seen corresponding path program 253 times [2020-09-14 12:50:40,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:50:40,684 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753553700] [2020-09-14 12:50:40,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:50:40,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:50:41,028 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:50:41,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753553700] [2020-09-14 12:50:41,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249248702] [2020-09-14 12:50:41,029 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:50:41,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:50:41,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:50:41,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:50:42,370 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:50:42,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:50:42,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-14 12:50:42,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341835559] [2020-09-14 12:50:42,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:50:42,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:50:42,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:50:42,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:50:42,371 INFO L87 Difference]: Start difference. First operand 175 states and 447 transitions. Second operand 19 states. [2020-09-14 12:50:43,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:50:43,614 INFO L93 Difference]: Finished difference Result 254 states and 600 transitions. [2020-09-14 12:50:43,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-14 12:50:43,618 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-14 12:50:43,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:50:43,619 INFO L225 Difference]: With dead ends: 254 [2020-09-14 12:50:43,619 INFO L226 Difference]: Without dead ends: 252 [2020-09-14 12:50:43,619 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=267, Invalid=545, Unknown=0, NotChecked=0, Total=812 [2020-09-14 12:50:43,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-09-14 12:50:43,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 174. [2020-09-14 12:50:43,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-09-14 12:50:43,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 444 transitions. [2020-09-14 12:50:43,622 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 444 transitions. Word has length 15 [2020-09-14 12:50:43,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:50:43,622 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 444 transitions. [2020-09-14 12:50:43,622 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:50:43,622 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 444 transitions. [2020-09-14 12:50:43,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-14 12:50:43,623 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:50:43,623 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:50:43,823 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:50:43,824 INFO L427 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:50:43,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:50:43,824 INFO L82 PathProgramCache]: Analyzing trace with hash -883231057, now seen corresponding path program 254 times [2020-09-14 12:50:43,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:50:43,825 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175797151] [2020-09-14 12:50:43,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:50:43,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:50:44,173 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:50:44,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175797151] [2020-09-14 12:50:44,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787293754] [2020-09-14 12:50:44,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:50:44,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:50:44,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:50:44,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:50:44,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:50:44,764 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:50:44,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:50:44,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-14 12:50:44,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326128976] [2020-09-14 12:50:44,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:50:44,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:50:44,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:50:44,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:50:44,766 INFO L87 Difference]: Start difference. First operand 174 states and 444 transitions. Second operand 19 states. [2020-09-14 12:50:46,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:50:46,139 INFO L93 Difference]: Finished difference Result 260 states and 612 transitions. [2020-09-14 12:50:46,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-14 12:50:46,144 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-14 12:50:46,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:50:46,145 INFO L225 Difference]: With dead ends: 260 [2020-09-14 12:50:46,145 INFO L226 Difference]: Without dead ends: 258 [2020-09-14 12:50:46,146 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=302, Invalid=628, Unknown=0, NotChecked=0, Total=930 [2020-09-14 12:50:46,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-09-14 12:50:46,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 177. [2020-09-14 12:50:46,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-09-14 12:50:46,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 453 transitions. [2020-09-14 12:50:46,149 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 453 transitions. Word has length 15 [2020-09-14 12:50:46,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:50:46,149 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 453 transitions. [2020-09-14 12:50:46,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:50:46,149 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 453 transitions. [2020-09-14 12:50:46,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-14 12:50:46,150 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:50:46,150 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:50:46,351 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable296 [2020-09-14 12:50:46,352 INFO L427 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:50:46,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:50:46,353 INFO L82 PathProgramCache]: Analyzing trace with hash -883230096, now seen corresponding path program 255 times [2020-09-14 12:50:46,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:50:46,353 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601011992] [2020-09-14 12:50:46,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:50:46,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:50:46,787 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:50:46,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601011992] [2020-09-14 12:50:46,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786546970] [2020-09-14 12:50:46,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:50:46,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-14 12:50:46,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:50:46,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:50:46,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:50:47,481 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:50:47,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:50:47,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-14 12:50:47,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037201760] [2020-09-14 12:50:47,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:50:47,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:50:47,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:50:47,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:50:47,482 INFO L87 Difference]: Start difference. First operand 177 states and 453 transitions. Second operand 19 states. [2020-09-14 12:50:48,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:50:48,722 INFO L93 Difference]: Finished difference Result 264 states and 623 transitions. [2020-09-14 12:50:48,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-14 12:50:48,726 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-14 12:50:48,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:50:48,727 INFO L225 Difference]: With dead ends: 264 [2020-09-14 12:50:48,727 INFO L226 Difference]: Without dead ends: 262 [2020-09-14 12:50:48,728 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=261, Invalid=551, Unknown=0, NotChecked=0, Total=812 [2020-09-14 12:50:48,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-09-14 12:50:48,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 179. [2020-09-14 12:50:48,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-09-14 12:50:48,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 459 transitions. [2020-09-14 12:50:48,731 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 459 transitions. Word has length 15 [2020-09-14 12:50:48,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:50:48,731 INFO L479 AbstractCegarLoop]: Abstraction has 179 states and 459 transitions. [2020-09-14 12:50:48,732 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:50:48,732 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 459 transitions. [2020-09-14 12:50:48,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-14 12:50:48,732 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:50:48,732 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:50:48,932 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:50:48,933 INFO L427 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:50:48,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:50:48,933 INFO L82 PathProgramCache]: Analyzing trace with hash -883201266, now seen corresponding path program 256 times [2020-09-14 12:50:48,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:50:48,934 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955766986] [2020-09-14 12:50:48,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:50:48,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:50:49,340 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:50:49,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955766986] [2020-09-14 12:50:49,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121833161] [2020-09-14 12:50:49,341 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:50:49,403 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:50:49,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:50:49,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:50:49,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:50:50,073 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:50:50,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:50:50,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-14 12:50:50,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161768193] [2020-09-14 12:50:50,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:50:50,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:50:50,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:50:50,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:50:50,075 INFO L87 Difference]: Start difference. First operand 179 states and 459 transitions. Second operand 19 states. [2020-09-14 12:50:51,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:50:51,720 INFO L93 Difference]: Finished difference Result 261 states and 620 transitions. [2020-09-14 12:50:51,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-14 12:50:51,725 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-14 12:50:51,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:50:51,726 INFO L225 Difference]: With dead ends: 261 [2020-09-14 12:50:51,726 INFO L226 Difference]: Without dead ends: 259 [2020-09-14 12:50:51,727 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=301, Invalid=629, Unknown=0, NotChecked=0, Total=930 [2020-09-14 12:50:51,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-09-14 12:50:51,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 177. [2020-09-14 12:50:51,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-09-14 12:50:51,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 453 transitions. [2020-09-14 12:50:51,730 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 453 transitions. Word has length 15 [2020-09-14 12:50:51,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:50:51,736 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 453 transitions. [2020-09-14 12:50:51,737 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:50:51,737 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 453 transitions. [2020-09-14 12:50:51,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-14 12:50:51,737 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:50:51,737 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:50:51,938 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable298 [2020-09-14 12:50:51,938 INFO L427 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:50:51,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:50:51,939 INFO L82 PathProgramCache]: Analyzing trace with hash -855524466, now seen corresponding path program 257 times [2020-09-14 12:50:51,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:50:51,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889991187] [2020-09-14 12:50:51,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:50:51,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:50:52,387 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:50:52,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889991187] [2020-09-14 12:50:52,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950852781] [2020-09-14 12:50:52,388 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:50:52,445 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-14 12:50:52,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:50:52,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:50:52,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:50:53,333 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:50:53,333 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:50:53,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-14 12:50:53,333 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829679671] [2020-09-14 12:50:53,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:50:53,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:50:53,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:50:53,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:50:53,334 INFO L87 Difference]: Start difference. First operand 177 states and 453 transitions. Second operand 19 states. [2020-09-14 12:50:54,284 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-09-14 12:50:55,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:50:55,547 INFO L93 Difference]: Finished difference Result 259 states and 612 transitions. [2020-09-14 12:50:55,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-14 12:50:55,553 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-14 12:50:55,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:50:55,553 INFO L225 Difference]: With dead ends: 259 [2020-09-14 12:50:55,553 INFO L226 Difference]: Without dead ends: 257 [2020-09-14 12:50:55,554 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=318, Invalid=674, Unknown=0, NotChecked=0, Total=992 [2020-09-14 12:50:55,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-09-14 12:50:55,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 177. [2020-09-14 12:50:55,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-09-14 12:50:55,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 453 transitions. [2020-09-14 12:50:55,557 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 453 transitions. Word has length 15 [2020-09-14 12:50:55,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:50:55,557 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 453 transitions. [2020-09-14 12:50:55,557 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:50:55,557 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 453 transitions. [2020-09-14 12:50:55,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-14 12:50:55,558 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:50:55,558 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:50:55,758 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 293 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2020-09-14 12:50:55,759 INFO L427 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:50:55,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:50:55,759 INFO L82 PathProgramCache]: Analyzing trace with hash -855495636, now seen corresponding path program 258 times [2020-09-14 12:50:55,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:50:55,760 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950597980] [2020-09-14 12:50:55,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:50:55,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:50:56,077 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:50:56,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950597980] [2020-09-14 12:50:56,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975920862] [2020-09-14 12:50:56,078 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:50:56,139 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-14 12:50:56,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:50:56,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:50:56,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:01,501 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:01,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:01,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-14 12:51:01,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202239959] [2020-09-14 12:51:01,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:51:01,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:01,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:51:01,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=243, Unknown=2, NotChecked=0, Total=342 [2020-09-14 12:51:01,503 INFO L87 Difference]: Start difference. First operand 177 states and 453 transitions. Second operand 19 states. [2020-09-14 12:51:01,933 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 16 [2020-09-14 12:51:06,197 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 52 DAG size of output: 42