/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/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-VariableLbe.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench_longest-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b981219 [2020-04-17 22:57:18,191 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-04-17 22:57:18,194 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-04-17 22:57:18,213 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-04-17 22:57:18,213 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-04-17 22:57:18,215 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-04-17 22:57:18,217 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-04-17 22:57:18,227 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-04-17 22:57:18,230 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-04-17 22:57:18,234 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-04-17 22:57:18,236 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-04-17 22:57:18,238 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-04-17 22:57:18,238 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-04-17 22:57:18,240 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-04-17 22:57:18,242 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-04-17 22:57:18,244 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-04-17 22:57:18,245 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-04-17 22:57:18,246 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-04-17 22:57:18,247 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-04-17 22:57:18,252 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-04-17 22:57:18,258 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-04-17 22:57:18,263 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-04-17 22:57:18,264 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-04-17 22:57:18,265 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-04-17 22:57:18,267 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-04-17 22:57:18,267 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-04-17 22:57:18,267 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-04-17 22:57:18,269 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-04-17 22:57:18,270 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-04-17 22:57:18,272 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-04-17 22:57:18,272 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-04-17 22:57:18,273 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-04-17 22:57:18,275 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-04-17 22:57:18,275 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-04-17 22:57:18,277 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-04-17 22:57:18,277 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-04-17 22:57:18,278 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-04-17 22:57:18,278 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-04-17 22:57:18,278 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-04-17 22:57:18,280 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-04-17 22:57:18,281 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-04-17 22:57:18,282 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-VariableLbe.epf [2020-04-17 22:57:18,319 INFO L113 SettingsManager]: Loading preferences was successful [2020-04-17 22:57:18,319 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-04-17 22:57:18,320 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-04-17 22:57:18,321 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-04-17 22:57:18,321 INFO L138 SettingsManager]: * Use SBE=true [2020-04-17 22:57:18,324 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-04-17 22:57:18,325 INFO L138 SettingsManager]: * sizeof long=4 [2020-04-17 22:57:18,325 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-04-17 22:57:18,325 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-04-17 22:57:18,325 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-04-17 22:57:18,325 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-04-17 22:57:18,326 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-04-17 22:57:18,326 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-04-17 22:57:18,326 INFO L138 SettingsManager]: * sizeof long double=12 [2020-04-17 22:57:18,326 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-04-17 22:57:18,326 INFO L138 SettingsManager]: * Use constant arrays=true [2020-04-17 22:57:18,327 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-04-17 22:57:18,327 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-04-17 22:57:18,327 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-04-17 22:57:18,327 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-04-17 22:57:18,327 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-04-17 22:57:18,328 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-04-17 22:57:18,328 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-04-17 22:57:18,328 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-04-17 22:57:18,328 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-04-17 22:57:18,329 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-04-17 22:57:18,329 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-04-17 22:57:18,329 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-04-17 22:57:18,329 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-04-17 22:57:18,329 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-04-17 22:57:18,643 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-04-17 22:57:18,656 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-04-17 22:57:18,660 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-04-17 22:57:18,661 INFO L271 PluginConnector]: Initializing CDTParser... [2020-04-17 22:57:18,662 INFO L275 PluginConnector]: CDTParser initialized [2020-04-17 22:57:18,663 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longest-1.i [2020-04-17 22:57:18,732 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca0d10302/e83758e136434db9a07ca27f8d0fab7f/FLAG5700c05b1 [2020-04-17 22:57:19,315 INFO L306 CDTParser]: Found 1 translation units. [2020-04-17 22:57:19,316 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longest-1.i [2020-04-17 22:57:19,333 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca0d10302/e83758e136434db9a07ca27f8d0fab7f/FLAG5700c05b1 [2020-04-17 22:57:19,543 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca0d10302/e83758e136434db9a07ca27f8d0fab7f [2020-04-17 22:57:19,552 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-04-17 22:57:19,570 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-04-17 22:57:19,571 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-04-17 22:57:19,572 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-04-17 22:57:19,575 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-04-17 22:57:19,576 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.04 10:57:19" (1/1) ... [2020-04-17 22:57:19,579 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60d5e33d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:57:19, skipping insertion in model container [2020-04-17 22:57:19,579 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.04 10:57:19" (1/1) ... [2020-04-17 22:57:19,587 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-04-17 22:57:19,637 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-04-17 22:57:20,117 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-17 22:57:20,129 INFO L203 MainTranslator]: Completed pre-run [2020-04-17 22:57:20,212 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-17 22:57:20,303 INFO L208 MainTranslator]: Completed translation [2020-04-17 22:57:20,303 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:57:20 WrapperNode [2020-04-17 22:57:20,304 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-04-17 22:57:20,304 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-04-17 22:57:20,305 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-04-17 22:57:20,305 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-04-17 22:57:20,313 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:57:20" (1/1) ... [2020-04-17 22:57:20,350 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:57:20" (1/1) ... [2020-04-17 22:57:20,374 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-04-17 22:57:20,375 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-04-17 22:57:20,375 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-04-17 22:57:20,375 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-04-17 22:57:20,382 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:57:20" (1/1) ... [2020-04-17 22:57:20,382 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:57:20" (1/1) ... [2020-04-17 22:57:20,384 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:57:20" (1/1) ... [2020-04-17 22:57:20,385 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:57:20" (1/1) ... [2020-04-17 22:57:20,390 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:57:20" (1/1) ... [2020-04-17 22:57:20,398 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:57:20" (1/1) ... [2020-04-17 22:57:20,404 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:57:20" (1/1) ... [2020-04-17 22:57:20,407 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-04-17 22:57:20,408 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-04-17 22:57:20,408 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-04-17 22:57:20,408 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-04-17 22:57:20,410 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:57:20" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-04-17 22:57:20,471 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-04-17 22:57:20,472 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-04-17 22:57:20,472 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-04-17 22:57:20,472 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-04-17 22:57:20,472 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-04-17 22:57:20,472 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-04-17 22:57:20,473 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-04-17 22:57:20,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-04-17 22:57:20,473 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-04-17 22:57:20,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-04-17 22:57:20,473 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-04-17 22:57:20,475 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-04-17 22:57:20,849 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-04-17 22:57:20,850 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-04-17 22:57:20,854 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.04 10:57:20 BoogieIcfgContainer [2020-04-17 22:57:20,854 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-04-17 22:57:20,855 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-04-17 22:57:20,856 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-04-17 22:57:20,859 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-04-17 22:57:20,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.04 10:57:19" (1/3) ... [2020-04-17 22:57:20,860 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70aa09d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.04 10:57:20, skipping insertion in model container [2020-04-17 22:57:20,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:57:20" (2/3) ... [2020-04-17 22:57:20,861 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70aa09d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.04 10:57:20, skipping insertion in model container [2020-04-17 22:57:20,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.04 10:57:20" (3/3) ... [2020-04-17 22:57:20,863 INFO L109 eAbstractionObserver]: Analyzing ICFG fib_bench_longest-1.i [2020-04-17 22:57:20,873 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-04-17 22:57:20,874 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-04-17 22:57:20,881 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-04-17 22:57:20,882 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-04-17 22:57:20,908 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,909 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,909 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,911 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,912 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,912 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,912 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,912 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,913 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,913 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,913 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,913 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,914 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,914 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,914 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,915 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,915 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,915 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,915 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,915 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,916 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,916 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,916 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,917 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,917 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,917 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,917 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,918 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,918 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,918 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,922 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,922 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,922 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,922 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,923 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,923 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,929 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,929 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,929 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,930 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,930 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,930 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,943 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-04-17 22:57:20,960 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-17 22:57:20,960 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-17 22:57:20,960 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-17 22:57:20,960 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-17 22:57:20,961 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-17 22:57:20,961 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-17 22:57:20,961 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-17 22:57:20,961 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-17 22:57:20,975 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 59 places, 57 transitions, 124 flow [2020-04-17 22:57:20,977 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-04-17 22:57:21,018 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-04-17 22:57:21,019 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-04-17 22:57:21,025 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. [2020-04-17 22:57:21,028 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-04-17 22:57:21,045 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-04-17 22:57:21,046 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-04-17 22:57:21,047 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. [2020-04-17 22:57:21,049 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 1032 [2020-04-17 22:57:21,050 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-04-17 22:57:22,248 WARN L192 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-04-17 22:57:22,364 INFO L206 etLargeBlockEncoding]: Checked pairs total: 988 [2020-04-17 22:57:22,364 INFO L214 etLargeBlockEncoding]: Total number of compositions: 47 [2020-04-17 22:57:22,370 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-04-17 22:57:22,385 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-04-17 22:57:22,387 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-04-17 22:57:22,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-04-17 22:57:22,395 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:22,396 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-04-17 22:57:22,397 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:22,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:22,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1563716626, now seen corresponding path program 1 times [2020-04-17 22:57:22,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:22,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468419967] [2020-04-17 22:57:22,411 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:22,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:22,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:22,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468419967] [2020-04-17 22:57:22,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:57:22,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-17 22:57:22,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159065201] [2020-04-17 22:57:22,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-04-17 22:57:22,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:22,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-17 22:57:22,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-04-17 22:57:22,688 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-04-17 22:57:22,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:22,788 INFO L93 Difference]: Finished difference Result 83 states and 212 transitions. [2020-04-17 22:57:22,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-04-17 22:57:22,790 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-04-17 22:57:22,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:22,803 INFO L225 Difference]: With dead ends: 83 [2020-04-17 22:57:22,804 INFO L226 Difference]: Without dead ends: 54 [2020-04-17 22:57:22,805 INFO L678 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 [2020-04-17 22:57:22,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-04-17 22:57:22,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-04-17 22:57:22,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-04-17 22:57:22,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 120 transitions. [2020-04-17 22:57:22,849 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 120 transitions. Word has length 6 [2020-04-17 22:57:22,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:22,849 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 120 transitions. [2020-04-17 22:57:22,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-04-17 22:57:22,849 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 120 transitions. [2020-04-17 22:57:22,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-17 22:57:22,851 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:22,851 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:22,851 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:22,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:22,851 INFO L82 PathProgramCache]: Analyzing trace with hash 956938306, now seen corresponding path program 1 times [2020-04-17 22:57:22,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:22,852 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119701937] [2020-04-17 22:57:22,852 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:22,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:22,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:22,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119701937] [2020-04-17 22:57:22,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:57:22,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 22:57:22,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892532898] [2020-04-17 22:57:22,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-17 22:57:22,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:22,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-17 22:57:22,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-04-17 22:57:22,964 INFO L87 Difference]: Start difference. First operand 50 states and 120 transitions. Second operand 5 states. [2020-04-17 22:57:23,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:23,041 INFO L93 Difference]: Finished difference Result 80 states and 186 transitions. [2020-04-17 22:57:23,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 22:57:23,042 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-04-17 22:57:23,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:23,044 INFO L225 Difference]: With dead ends: 80 [2020-04-17 22:57:23,044 INFO L226 Difference]: Without dead ends: 75 [2020-04-17 22:57:23,045 INFO L678 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 [2020-04-17 22:57:23,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-04-17 22:57:23,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 55. [2020-04-17 22:57:23,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-04-17 22:57:23,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-04-17 22:57:23,060 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 8 [2020-04-17 22:57:23,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:23,063 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-04-17 22:57:23,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-17 22:57:23,064 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-04-17 22:57:23,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-17 22:57:23,065 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:23,065 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:23,065 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:23,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:23,066 INFO L82 PathProgramCache]: Analyzing trace with hash 507192011, now seen corresponding path program 1 times [2020-04-17 22:57:23,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:23,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557670009] [2020-04-17 22:57:23,066 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:23,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:23,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:23,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557670009] [2020-04-17 22:57:23,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:57:23,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 22:57:23,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142811431] [2020-04-17 22:57:23,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-17 22:57:23,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:23,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-17 22:57:23,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-04-17 22:57:23,167 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 5 states. [2020-04-17 22:57:23,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:23,193 INFO L93 Difference]: Finished difference Result 73 states and 170 transitions. [2020-04-17 22:57:23,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-04-17 22:57:23,193 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-04-17 22:57:23,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:23,195 INFO L225 Difference]: With dead ends: 73 [2020-04-17 22:57:23,195 INFO L226 Difference]: Without dead ends: 70 [2020-04-17 22:57:23,195 INFO L678 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 [2020-04-17 22:57:23,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-04-17 22:57:23,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-04-17 22:57:23,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-04-17 22:57:23,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 152 transitions. [2020-04-17 22:57:23,205 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 152 transitions. Word has length 8 [2020-04-17 22:57:23,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:23,206 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 152 transitions. [2020-04-17 22:57:23,206 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-17 22:57:23,206 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 152 transitions. [2020-04-17 22:57:23,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-17 22:57:23,207 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:23,207 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:23,207 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:23,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:23,208 INFO L82 PathProgramCache]: Analyzing trace with hash 507214331, now seen corresponding path program 2 times [2020-04-17 22:57:23,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:23,208 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286810787] [2020-04-17 22:57:23,209 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:23,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:23,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:23,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286810787] [2020-04-17 22:57:23,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:57:23,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 22:57:23,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278578260] [2020-04-17 22:57:23,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-17 22:57:23,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:23,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-17 22:57:23,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-04-17 22:57:23,288 INFO L87 Difference]: Start difference. First operand 64 states and 152 transitions. Second operand 5 states. [2020-04-17 22:57:23,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:23,356 INFO L93 Difference]: Finished difference Result 86 states and 202 transitions. [2020-04-17 22:57:23,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 22:57:23,362 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-04-17 22:57:23,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:23,364 INFO L225 Difference]: With dead ends: 86 [2020-04-17 22:57:23,364 INFO L226 Difference]: Without dead ends: 80 [2020-04-17 22:57:23,364 INFO L678 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 [2020-04-17 22:57:23,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-04-17 22:57:23,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2020-04-17 22:57:23,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-04-17 22:57:23,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 157 transitions. [2020-04-17 22:57:23,385 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 157 transitions. Word has length 8 [2020-04-17 22:57:23,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:23,385 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 157 transitions. [2020-04-17 22:57:23,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-17 22:57:23,386 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 157 transitions. [2020-04-17 22:57:23,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-17 22:57:23,387 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:23,387 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:23,388 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:23,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:23,388 INFO L82 PathProgramCache]: Analyzing trace with hash -399661872, now seen corresponding path program 2 times [2020-04-17 22:57:23,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:23,389 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60259510] [2020-04-17 22:57:23,389 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:23,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:23,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:23,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60259510] [2020-04-17 22:57:23,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265806916] [2020-04-17 22:57:23,497 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:23,576 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:57:23,576 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:23,578 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 22:57:23,585 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:23,655 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:23,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:23,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:23,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2020-04-17 22:57:23,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796328169] [2020-04-17 22:57:23,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 22:57:23,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:23,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 22:57:23,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-04-17 22:57:23,693 INFO L87 Difference]: Start difference. First operand 66 states and 157 transitions. Second operand 10 states. [2020-04-17 22:57:23,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:23,806 INFO L93 Difference]: Finished difference Result 101 states and 235 transitions. [2020-04-17 22:57:23,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 22:57:23,808 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2020-04-17 22:57:23,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:23,809 INFO L225 Difference]: With dead ends: 101 [2020-04-17 22:57:23,810 INFO L226 Difference]: Without dead ends: 96 [2020-04-17 22:57:23,810 INFO L678 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 [2020-04-17 22:57:23,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-04-17 22:57:23,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2020-04-17 22:57:23,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-04-17 22:57:23,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 173 transitions. [2020-04-17 22:57:23,825 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 173 transitions. Word has length 9 [2020-04-17 22:57:23,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:23,825 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 173 transitions. [2020-04-17 22:57:23,825 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 22:57:23,825 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 173 transitions. [2020-04-17 22:57:23,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-17 22:57:23,826 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:23,827 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:24,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:24,031 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:24,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:24,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1456916488, now seen corresponding path program 3 times [2020-04-17 22:57:24,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:24,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822302589] [2020-04-17 22:57:24,032 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:24,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:24,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:24,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822302589] [2020-04-17 22:57:24,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848430376] [2020-04-17 22:57:24,138 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:24,206 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 22:57:24,207 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:24,207 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 22:57:24,208 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:24,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:24,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:24,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-04-17 22:57:24,301 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202025136] [2020-04-17 22:57:24,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 22:57:24,302 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:24,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 22:57:24,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-04-17 22:57:24,303 INFO L87 Difference]: Start difference. First operand 71 states and 173 transitions. Second operand 9 states. [2020-04-17 22:57:24,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:24,341 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-04-17 22:57:24,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-04-17 22:57:24,341 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-04-17 22:57:24,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:24,342 INFO L225 Difference]: With dead ends: 84 [2020-04-17 22:57:24,342 INFO L226 Difference]: Without dead ends: 81 [2020-04-17 22:57:24,343 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-04-17 22:57:24,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-04-17 22:57:24,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2020-04-17 22:57:24,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-04-17 22:57:24,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 179 transitions. [2020-04-17 22:57:24,354 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 179 transitions. Word has length 9 [2020-04-17 22:57:24,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:24,355 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 179 transitions. [2020-04-17 22:57:24,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 22:57:24,356 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 179 transitions. [2020-04-17 22:57:24,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-17 22:57:24,357 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:24,357 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:24,565 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:24,566 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:24,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:24,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1456224568, now seen corresponding path program 4 times [2020-04-17 22:57:24,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:24,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505134841] [2020-04-17 22:57:24,567 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:24,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:24,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:24,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505134841] [2020-04-17 22:57:24,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352581561] [2020-04-17 22:57:24,638 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 22:57:24,679 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:57:24,680 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:24,680 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 22:57:24,681 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:24,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:24,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:24,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-04-17 22:57:24,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527625482] [2020-04-17 22:57:24,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 22:57:24,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:24,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 22:57:24,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-04-17 22:57:24,758 INFO L87 Difference]: Start difference. First operand 74 states and 179 transitions. Second operand 9 states. [2020-04-17 22:57:24,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:24,822 INFO L93 Difference]: Finished difference Result 90 states and 213 transitions. [2020-04-17 22:57:24,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 22:57:24,822 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-04-17 22:57:24,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:24,823 INFO L225 Difference]: With dead ends: 90 [2020-04-17 22:57:24,823 INFO L226 Difference]: Without dead ends: 87 [2020-04-17 22:57:24,824 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-04-17 22:57:24,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-04-17 22:57:24,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 76. [2020-04-17 22:57:24,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-04-17 22:57:24,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 186 transitions. [2020-04-17 22:57:24,831 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 186 transitions. Word has length 9 [2020-04-17 22:57:24,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:24,831 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 186 transitions. [2020-04-17 22:57:24,831 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 22:57:24,832 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 186 transitions. [2020-04-17 22:57:24,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-17 22:57:24,832 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:24,833 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:25,046 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:25,047 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:25,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:25,047 INFO L82 PathProgramCache]: Analyzing trace with hash -1456202248, now seen corresponding path program 5 times [2020-04-17 22:57:25,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:25,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375100883] [2020-04-17 22:57:25,049 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:25,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:25,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:25,112 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375100883] [2020-04-17 22:57:25,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327439210] [2020-04-17 22:57:25,113 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:25,164 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:57:25,164 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:25,165 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 22:57:25,166 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:25,231 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:25,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:25,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:25,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-04-17 22:57:25,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610340892] [2020-04-17 22:57:25,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 22:57:25,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:25,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 22:57:25,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-04-17 22:57:25,248 INFO L87 Difference]: Start difference. First operand 76 states and 186 transitions. Second operand 9 states. [2020-04-17 22:57:25,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:25,346 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-04-17 22:57:25,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 22:57:25,347 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-04-17 22:57:25,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:25,348 INFO L225 Difference]: With dead ends: 99 [2020-04-17 22:57:25,348 INFO L226 Difference]: Without dead ends: 93 [2020-04-17 22:57:25,348 INFO L678 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 [2020-04-17 22:57:25,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-04-17 22:57:25,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 77. [2020-04-17 22:57:25,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-04-17 22:57:25,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 190 transitions. [2020-04-17 22:57:25,355 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 190 transitions. Word has length 9 [2020-04-17 22:57:25,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:25,355 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 190 transitions. [2020-04-17 22:57:25,355 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 22:57:25,355 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 190 transitions. [2020-04-17 22:57:25,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 22:57:25,356 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:25,356 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:25,565 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:25,565 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:25,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:25,566 INFO L82 PathProgramCache]: Analyzing trace with hash 483638869, now seen corresponding path program 1 times [2020-04-17 22:57:25,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:25,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819769158] [2020-04-17 22:57:25,567 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:25,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:25,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:25,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819769158] [2020-04-17 22:57:25,645 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:57:25,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-17 22:57:25,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166700380] [2020-04-17 22:57:25,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-17 22:57:25,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:25,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-17 22:57:25,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-04-17 22:57:25,647 INFO L87 Difference]: Start difference. First operand 77 states and 190 transitions. Second operand 6 states. [2020-04-17 22:57:25,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:25,677 INFO L93 Difference]: Finished difference Result 92 states and 220 transitions. [2020-04-17 22:57:25,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-04-17 22:57:25,677 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-04-17 22:57:25,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:25,678 INFO L225 Difference]: With dead ends: 92 [2020-04-17 22:57:25,679 INFO L226 Difference]: Without dead ends: 90 [2020-04-17 22:57:25,679 INFO L678 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 [2020-04-17 22:57:25,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-04-17 22:57:25,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 79. [2020-04-17 22:57:25,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-04-17 22:57:25,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 194 transitions. [2020-04-17 22:57:25,685 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 194 transitions. Word has length 10 [2020-04-17 22:57:25,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:25,686 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 194 transitions. [2020-04-17 22:57:25,686 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-17 22:57:25,686 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 194 transitions. [2020-04-17 22:57:25,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 22:57:25,687 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:25,687 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:25,688 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:25,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:25,688 INFO L82 PathProgramCache]: Analyzing trace with hash 484301959, now seen corresponding path program 2 times [2020-04-17 22:57:25,688 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:25,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832063032] [2020-04-17 22:57:25,689 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:25,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:25,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:25,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832063032] [2020-04-17 22:57:25,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:57:25,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-17 22:57:25,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258761458] [2020-04-17 22:57:25,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-17 22:57:25,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:25,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-17 22:57:25,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-04-17 22:57:25,758 INFO L87 Difference]: Start difference. First operand 79 states and 194 transitions. Second operand 6 states. [2020-04-17 22:57:25,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:25,823 INFO L93 Difference]: Finished difference Result 100 states and 234 transitions. [2020-04-17 22:57:25,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 22:57:25,823 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-04-17 22:57:25,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:25,825 INFO L225 Difference]: With dead ends: 100 [2020-04-17 22:57:25,825 INFO L226 Difference]: Without dead ends: 98 [2020-04-17 22:57:25,825 INFO L678 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 [2020-04-17 22:57:25,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-04-17 22:57:25,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 83. [2020-04-17 22:57:25,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-04-17 22:57:25,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 200 transitions. [2020-04-17 22:57:25,831 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 200 transitions. Word has length 10 [2020-04-17 22:57:25,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:25,831 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 200 transitions. [2020-04-17 22:57:25,831 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-17 22:57:25,831 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 200 transitions. [2020-04-17 22:57:25,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 22:57:25,832 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:25,833 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:25,833 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:25,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:25,833 INFO L82 PathProgramCache]: Analyzing trace with hash 484324279, now seen corresponding path program 3 times [2020-04-17 22:57:25,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:25,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770854843] [2020-04-17 22:57:25,834 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:25,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:25,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:25,883 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770854843] [2020-04-17 22:57:25,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:57:25,883 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-17 22:57:25,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979391382] [2020-04-17 22:57:25,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-17 22:57:25,884 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:25,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-17 22:57:25,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-04-17 22:57:25,885 INFO L87 Difference]: Start difference. First operand 83 states and 200 transitions. Second operand 6 states. [2020-04-17 22:57:25,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:25,958 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-04-17 22:57:25,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 22:57:25,959 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-04-17 22:57:25,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:25,960 INFO L225 Difference]: With dead ends: 105 [2020-04-17 22:57:25,960 INFO L226 Difference]: Without dead ends: 100 [2020-04-17 22:57:25,961 INFO L678 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 [2020-04-17 22:57:25,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-04-17 22:57:25,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-04-17 22:57:25,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-04-17 22:57:25,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 198 transitions. [2020-04-17 22:57:25,966 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 198 transitions. Word has length 10 [2020-04-17 22:57:25,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:25,966 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 198 transitions. [2020-04-17 22:57:25,966 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-17 22:57:25,966 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 198 transitions. [2020-04-17 22:57:25,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 22:57:25,967 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:25,968 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:25,968 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:25,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:25,968 INFO L82 PathProgramCache]: Analyzing trace with hash 484353109, now seen corresponding path program 4 times [2020-04-17 22:57:25,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:25,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143184127] [2020-04-17 22:57:25,969 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:25,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:26,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:26,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143184127] [2020-04-17 22:57:26,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:57:26,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-17 22:57:26,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505936954] [2020-04-17 22:57:26,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-17 22:57:26,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:26,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-17 22:57:26,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-04-17 22:57:26,019 INFO L87 Difference]: Start difference. First operand 82 states and 198 transitions. Second operand 6 states. [2020-04-17 22:57:26,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:26,094 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-04-17 22:57:26,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 22:57:26,095 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-04-17 22:57:26,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:26,096 INFO L225 Difference]: With dead ends: 105 [2020-04-17 22:57:26,097 INFO L226 Difference]: Without dead ends: 100 [2020-04-17 22:57:26,097 INFO L678 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 [2020-04-17 22:57:26,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-04-17 22:57:26,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-04-17 22:57:26,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-04-17 22:57:26,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 194 transitions. [2020-04-17 22:57:26,102 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 194 transitions. Word has length 10 [2020-04-17 22:57:26,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:26,102 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 194 transitions. [2020-04-17 22:57:26,103 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-17 22:57:26,103 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 194 transitions. [2020-04-17 22:57:26,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 22:57:26,104 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:26,104 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:26,104 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:26,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:26,104 INFO L82 PathProgramCache]: Analyzing trace with hash 495405570, now seen corresponding path program 3 times [2020-04-17 22:57:26,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:26,105 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731541492] [2020-04-17 22:57:26,105 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:26,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:26,171 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:26,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731541492] [2020-04-17 22:57:26,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411596276] [2020-04-17 22:57:26,172 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:26,235 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 22:57:26,235 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:26,236 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:57:26,237 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:26,301 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:26,323 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:26,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:26,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-04-17 22:57:26,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074434723] [2020-04-17 22:57:26,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 22:57:26,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:26,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 22:57:26,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-04-17 22:57:26,326 INFO L87 Difference]: Start difference. First operand 82 states and 194 transitions. Second operand 12 states. [2020-04-17 22:57:26,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:26,450 INFO L93 Difference]: Finished difference Result 122 states and 284 transitions. [2020-04-17 22:57:26,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 22:57:26,450 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2020-04-17 22:57:26,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:26,452 INFO L225 Difference]: With dead ends: 122 [2020-04-17 22:57:26,452 INFO L226 Difference]: Without dead ends: 117 [2020-04-17 22:57:26,453 INFO L678 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 [2020-04-17 22:57:26,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-04-17 22:57:26,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 88. [2020-04-17 22:57:26,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-04-17 22:57:26,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 215 transitions. [2020-04-17 22:57:26,459 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 215 transitions. Word has length 10 [2020-04-17 22:57:26,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:26,459 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 215 transitions. [2020-04-17 22:57:26,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 22:57:26,459 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 215 transitions. [2020-04-17 22:57:26,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 22:57:26,460 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:26,461 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:26,664 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:26,667 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:26,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:26,668 INFO L82 PathProgramCache]: Analyzing trace with hash 2080229483, now seen corresponding path program 6 times [2020-04-17 22:57:26,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:26,668 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84052549] [2020-04-17 22:57:26,668 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:26,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:26,755 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:26,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84052549] [2020-04-17 22:57:26,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532209310] [2020-04-17 22:57:26,756 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:26,808 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 22:57:26,808 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:26,809 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:57:26,810 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:26,911 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:26,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:26,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 22:57:26,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481372911] [2020-04-17 22:57:26,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 22:57:26,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:26,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 22:57:26,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:26,913 INFO L87 Difference]: Start difference. First operand 88 states and 215 transitions. Second operand 11 states. [2020-04-17 22:57:26,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:26,991 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-04-17 22:57:26,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 22:57:26,996 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-04-17 22:57:26,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:26,998 INFO L225 Difference]: With dead ends: 108 [2020-04-17 22:57:26,998 INFO L226 Difference]: Without dead ends: 105 [2020-04-17 22:57:26,998 INFO L678 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 [2020-04-17 22:57:26,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-04-17 22:57:27,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 91. [2020-04-17 22:57:27,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-04-17 22:57:27,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 221 transitions. [2020-04-17 22:57:27,003 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 221 transitions. Word has length 10 [2020-04-17 22:57:27,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:27,003 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 221 transitions. [2020-04-17 22:57:27,003 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 22:57:27,003 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 221 transitions. [2020-04-17 22:57:27,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 22:57:27,004 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:27,004 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:27,208 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:27,209 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:27,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:27,210 INFO L82 PathProgramCache]: Analyzing trace with hash 2101679003, now seen corresponding path program 7 times [2020-04-17 22:57:27,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:27,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661639995] [2020-04-17 22:57:27,211 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:27,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:27,319 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:27,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661639995] [2020-04-17 22:57:27,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109963160] [2020-04-17 22:57:27,320 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:27,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:27,376 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:57:27,378 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:27,458 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:27,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:27,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 22:57:27,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975795119] [2020-04-17 22:57:27,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 22:57:27,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:27,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 22:57:27,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:27,460 INFO L87 Difference]: Start difference. First operand 91 states and 221 transitions. Second operand 11 states. [2020-04-17 22:57:27,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:27,519 INFO L93 Difference]: Finished difference Result 116 states and 270 transitions. [2020-04-17 22:57:27,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 22:57:27,520 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-04-17 22:57:27,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:27,523 INFO L225 Difference]: With dead ends: 116 [2020-04-17 22:57:27,523 INFO L226 Difference]: Without dead ends: 113 [2020-04-17 22:57:27,524 INFO L678 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 [2020-04-17 22:57:27,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-04-17 22:57:27,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 92. [2020-04-17 22:57:27,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-04-17 22:57:27,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 223 transitions. [2020-04-17 22:57:27,532 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 223 transitions. Word has length 10 [2020-04-17 22:57:27,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:27,532 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 223 transitions. [2020-04-17 22:57:27,532 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 22:57:27,532 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 223 transitions. [2020-04-17 22:57:27,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 22:57:27,533 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:27,533 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:27,733 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:27,734 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:27,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:27,734 INFO L82 PathProgramCache]: Analyzing trace with hash 2102370923, now seen corresponding path program 8 times [2020-04-17 22:57:27,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:27,735 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063240851] [2020-04-17 22:57:27,736 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:27,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:27,830 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:27,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063240851] [2020-04-17 22:57:27,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133777495] [2020-04-17 22:57:27,834 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:27,900 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:57:27,900 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:27,901 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:57:27,903 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:27,974 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:27,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:27,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 22:57:27,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137504844] [2020-04-17 22:57:27,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 22:57:27,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:27,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 22:57:27,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:27,976 INFO L87 Difference]: Start difference. First operand 92 states and 223 transitions. Second operand 11 states. [2020-04-17 22:57:28,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:28,059 INFO L93 Difference]: Finished difference Result 115 states and 270 transitions. [2020-04-17 22:57:28,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 22:57:28,060 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-04-17 22:57:28,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:28,061 INFO L225 Difference]: With dead ends: 115 [2020-04-17 22:57:28,061 INFO L226 Difference]: Without dead ends: 112 [2020-04-17 22:57:28,062 INFO L678 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 [2020-04-17 22:57:28,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-04-17 22:57:28,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 94. [2020-04-17 22:57:28,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-04-17 22:57:28,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 230 transitions. [2020-04-17 22:57:28,066 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 230 transitions. Word has length 10 [2020-04-17 22:57:28,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:28,066 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 230 transitions. [2020-04-17 22:57:28,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 22:57:28,066 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 230 transitions. [2020-04-17 22:57:28,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 22:57:28,067 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:28,067 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:28,271 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:28,271 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:28,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:28,272 INFO L82 PathProgramCache]: Analyzing trace with hash 2102393243, now seen corresponding path program 9 times [2020-04-17 22:57:28,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:28,272 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051421197] [2020-04-17 22:57:28,273 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:28,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:28,328 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:28,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051421197] [2020-04-17 22:57:28,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120200753] [2020-04-17 22:57:28,328 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:28,369 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 22:57:28,370 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:28,370 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:57:28,371 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:28,424 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:28,432 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:28,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:28,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 22:57:28,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927323376] [2020-04-17 22:57:28,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 22:57:28,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:28,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 22:57:28,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:28,435 INFO L87 Difference]: Start difference. First operand 94 states and 230 transitions. Second operand 11 states. [2020-04-17 22:57:28,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:28,561 INFO L93 Difference]: Finished difference Result 124 states and 294 transitions. [2020-04-17 22:57:28,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 22:57:28,562 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-04-17 22:57:28,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:28,563 INFO L225 Difference]: With dead ends: 124 [2020-04-17 22:57:28,563 INFO L226 Difference]: Without dead ends: 118 [2020-04-17 22:57:28,564 INFO L678 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 [2020-04-17 22:57:28,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-04-17 22:57:28,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 94. [2020-04-17 22:57:28,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-04-17 22:57:28,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 232 transitions. [2020-04-17 22:57:28,567 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 232 transitions. Word has length 10 [2020-04-17 22:57:28,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:28,568 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 232 transitions. [2020-04-17 22:57:28,568 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 22:57:28,568 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 232 transitions. [2020-04-17 22:57:28,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:28,568 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:28,569 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:28,775 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:28,776 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:28,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:28,776 INFO L82 PathProgramCache]: Analyzing trace with hash 2107902445, now seen corresponding path program 5 times [2020-04-17 22:57:28,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:28,776 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856366043] [2020-04-17 22:57:28,776 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:28,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:28,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:28,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856366043] [2020-04-17 22:57:28,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612578869] [2020-04-17 22:57:28,850 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:28,927 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:57:28,928 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:28,929 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:57:28,931 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:29,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:29,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:29,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 22:57:29,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150061440] [2020-04-17 22:57:29,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 22:57:29,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:29,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 22:57:29,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:29,019 INFO L87 Difference]: Start difference. First operand 94 states and 232 transitions. Second operand 11 states. [2020-04-17 22:57:29,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:29,071 INFO L93 Difference]: Finished difference Result 113 states and 270 transitions. [2020-04-17 22:57:29,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 22:57:29,071 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 22:57:29,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:29,072 INFO L225 Difference]: With dead ends: 113 [2020-04-17 22:57:29,072 INFO L226 Difference]: Without dead ends: 111 [2020-04-17 22:57:29,073 INFO L678 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 [2020-04-17 22:57:29,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-04-17 22:57:29,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 96. [2020-04-17 22:57:29,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-04-17 22:57:29,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 238 transitions. [2020-04-17 22:57:29,077 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 238 transitions. Word has length 11 [2020-04-17 22:57:29,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:29,078 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 238 transitions. [2020-04-17 22:57:29,078 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 22:57:29,078 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 238 transitions. [2020-04-17 22:57:29,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:29,079 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:29,079 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:29,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:29,285 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:29,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:29,285 INFO L82 PathProgramCache]: Analyzing trace with hash 2107903406, now seen corresponding path program 6 times [2020-04-17 22:57:29,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:29,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072812358] [2020-04-17 22:57:29,286 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:29,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:29,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:29,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072812358] [2020-04-17 22:57:29,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316237188] [2020-04-17 22:57:29,366 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:29,427 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 22:57:29,427 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:29,428 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:57:29,429 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:29,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:29,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:29,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 22:57:29,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351204599] [2020-04-17 22:57:29,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 22:57:29,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:29,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 22:57:29,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:29,523 INFO L87 Difference]: Start difference. First operand 96 states and 238 transitions. Second operand 11 states. [2020-04-17 22:57:29,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:29,588 INFO L93 Difference]: Finished difference Result 118 states and 280 transitions. [2020-04-17 22:57:29,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 22:57:29,589 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 22:57:29,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:29,590 INFO L225 Difference]: With dead ends: 118 [2020-04-17 22:57:29,590 INFO L226 Difference]: Without dead ends: 116 [2020-04-17 22:57:29,590 INFO L678 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 [2020-04-17 22:57:29,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-04-17 22:57:29,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 97. [2020-04-17 22:57:29,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-04-17 22:57:29,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 239 transitions. [2020-04-17 22:57:29,594 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 239 transitions. Word has length 11 [2020-04-17 22:57:29,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:29,594 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 239 transitions. [2020-04-17 22:57:29,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 22:57:29,595 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 239 transitions. [2020-04-17 22:57:29,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:29,595 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:29,595 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:29,798 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:29,799 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:29,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:29,800 INFO L82 PathProgramCache]: Analyzing trace with hash 2107932236, now seen corresponding path program 7 times [2020-04-17 22:57:29,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:29,801 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711990098] [2020-04-17 22:57:29,801 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:29,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:29,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:29,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711990098] [2020-04-17 22:57:29,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094588903] [2020-04-17 22:57:29,868 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:29,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:29,915 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:57:29,916 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:29,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:29,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:29,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 22:57:29,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789018370] [2020-04-17 22:57:29,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 22:57:29,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:29,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 22:57:29,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:29,998 INFO L87 Difference]: Start difference. First operand 97 states and 239 transitions. Second operand 11 states. [2020-04-17 22:57:30,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:30,074 INFO L93 Difference]: Finished difference Result 119 states and 282 transitions. [2020-04-17 22:57:30,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 22:57:30,075 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 22:57:30,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:30,076 INFO L225 Difference]: With dead ends: 119 [2020-04-17 22:57:30,076 INFO L226 Difference]: Without dead ends: 117 [2020-04-17 22:57:30,076 INFO L678 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 [2020-04-17 22:57:30,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-04-17 22:57:30,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 98. [2020-04-17 22:57:30,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-04-17 22:57:30,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 241 transitions. [2020-04-17 22:57:30,079 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 241 transitions. Word has length 11 [2020-04-17 22:57:30,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:30,079 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 241 transitions. [2020-04-17 22:57:30,080 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 22:57:30,080 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 241 transitions. [2020-04-17 22:57:30,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:30,080 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:30,080 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:30,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:30,281 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:30,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:30,282 INFO L82 PathProgramCache]: Analyzing trace with hash 2128458235, now seen corresponding path program 8 times [2020-04-17 22:57:30,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:30,282 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273084044] [2020-04-17 22:57:30,282 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:30,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:30,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:30,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273084044] [2020-04-17 22:57:30,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108792126] [2020-04-17 22:57:30,379 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:30,427 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:57:30,427 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:30,428 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:57:30,431 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:30,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:30,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:30,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 22:57:30,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669354734] [2020-04-17 22:57:30,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 22:57:30,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:30,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 22:57:30,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:30,518 INFO L87 Difference]: Start difference. First operand 98 states and 241 transitions. Second operand 11 states. [2020-04-17 22:57:30,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:30,577 INFO L93 Difference]: Finished difference Result 122 states and 288 transitions. [2020-04-17 22:57:30,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 22:57:30,577 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 22:57:30,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:30,578 INFO L225 Difference]: With dead ends: 122 [2020-04-17 22:57:30,578 INFO L226 Difference]: Without dead ends: 120 [2020-04-17 22:57:30,579 INFO L678 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 [2020-04-17 22:57:30,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-04-17 22:57:30,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 100. [2020-04-17 22:57:30,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-04-17 22:57:30,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 247 transitions. [2020-04-17 22:57:30,585 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 247 transitions. Word has length 11 [2020-04-17 22:57:30,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:30,585 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 247 transitions. [2020-04-17 22:57:30,585 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 22:57:30,585 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 247 transitions. [2020-04-17 22:57:30,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:30,586 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:30,586 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:30,789 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:30,790 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:30,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:30,790 INFO L82 PathProgramCache]: Analyzing trace with hash 2128459196, now seen corresponding path program 9 times [2020-04-17 22:57:30,790 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:30,790 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668479639] [2020-04-17 22:57:30,790 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:30,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:30,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:30,905 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668479639] [2020-04-17 22:57:30,905 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730277918] [2020-04-17 22:57:30,905 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:30,954 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 22:57:30,955 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:30,956 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:57:30,958 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:31,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:31,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:31,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 22:57:31,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292072299] [2020-04-17 22:57:31,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 22:57:31,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:31,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 22:57:31,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:31,035 INFO L87 Difference]: Start difference. First operand 100 states and 247 transitions. Second operand 11 states. [2020-04-17 22:57:31,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:31,152 INFO L93 Difference]: Finished difference Result 123 states and 290 transitions. [2020-04-17 22:57:31,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 22:57:31,152 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 22:57:31,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:31,153 INFO L225 Difference]: With dead ends: 123 [2020-04-17 22:57:31,153 INFO L226 Difference]: Without dead ends: 121 [2020-04-17 22:57:31,153 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-04-17 22:57:31,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-04-17 22:57:31,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 99. [2020-04-17 22:57:31,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-04-17 22:57:31,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 243 transitions. [2020-04-17 22:57:31,156 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 243 transitions. Word has length 11 [2020-04-17 22:57:31,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:31,156 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 243 transitions. [2020-04-17 22:57:31,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 22:57:31,157 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 243 transitions. [2020-04-17 22:57:31,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:31,157 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:31,157 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:31,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:31,361 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:31,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:31,361 INFO L82 PathProgramCache]: Analyzing trace with hash 2129121325, now seen corresponding path program 10 times [2020-04-17 22:57:31,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:31,361 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508557884] [2020-04-17 22:57:31,361 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:31,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:31,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:31,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508557884] [2020-04-17 22:57:31,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315805530] [2020-04-17 22:57:31,427 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:31,478 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:57:31,478 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:31,479 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:57:31,481 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:31,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:31,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:31,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 22:57:31,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683185634] [2020-04-17 22:57:31,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 22:57:31,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:31,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 22:57:31,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:31,571 INFO L87 Difference]: Start difference. First operand 99 states and 243 transitions. Second operand 11 states. [2020-04-17 22:57:31,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:31,646 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-04-17 22:57:31,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 22:57:31,646 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 22:57:31,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:31,647 INFO L225 Difference]: With dead ends: 123 [2020-04-17 22:57:31,647 INFO L226 Difference]: Without dead ends: 121 [2020-04-17 22:57:31,648 INFO L678 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 [2020-04-17 22:57:31,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-04-17 22:57:31,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 103. [2020-04-17 22:57:31,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-04-17 22:57:31,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 249 transitions. [2020-04-17 22:57:31,652 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 249 transitions. Word has length 11 [2020-04-17 22:57:31,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:31,652 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 249 transitions. [2020-04-17 22:57:31,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 22:57:31,652 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 249 transitions. [2020-04-17 22:57:31,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:31,653 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:31,653 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:31,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:31,858 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:31,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:31,859 INFO L82 PathProgramCache]: Analyzing trace with hash 2129143645, now seen corresponding path program 11 times [2020-04-17 22:57:31,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:31,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866993884] [2020-04-17 22:57:31,860 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:31,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:31,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:31,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866993884] [2020-04-17 22:57:31,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270493393] [2020-04-17 22:57:31,917 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:31,969 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:57:31,969 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:31,970 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:57:31,971 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:32,025 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:32,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:32,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:32,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 22:57:32,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900108266] [2020-04-17 22:57:32,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 22:57:32,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:32,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 22:57:32,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:32,042 INFO L87 Difference]: Start difference. First operand 103 states and 249 transitions. Second operand 11 states. [2020-04-17 22:57:32,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:32,218 INFO L93 Difference]: Finished difference Result 133 states and 314 transitions. [2020-04-17 22:57:32,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 22:57:32,218 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 22:57:32,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:32,220 INFO L225 Difference]: With dead ends: 133 [2020-04-17 22:57:32,220 INFO L226 Difference]: Without dead ends: 128 [2020-04-17 22:57:32,221 INFO L678 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 [2020-04-17 22:57:32,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-04-17 22:57:32,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 102. [2020-04-17 22:57:32,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-04-17 22:57:32,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 247 transitions. [2020-04-17 22:57:32,225 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 247 transitions. Word has length 11 [2020-04-17 22:57:32,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:32,225 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 247 transitions. [2020-04-17 22:57:32,225 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 22:57:32,226 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 247 transitions. [2020-04-17 22:57:32,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:32,226 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:32,226 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:32,430 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:32,430 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:32,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:32,431 INFO L82 PathProgramCache]: Analyzing trace with hash 2129151116, now seen corresponding path program 12 times [2020-04-17 22:57:32,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:32,431 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104149485] [2020-04-17 22:57:32,431 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:32,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:32,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:32,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104149485] [2020-04-17 22:57:32,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225707908] [2020-04-17 22:57:32,492 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:32,536 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 22:57:32,536 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:32,537 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:57:32,537 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:32,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:32,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:32,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 22:57:32,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788530809] [2020-04-17 22:57:32,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 22:57:32,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:32,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 22:57:32,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:32,625 INFO L87 Difference]: Start difference. First operand 102 states and 247 transitions. Second operand 11 states. [2020-04-17 22:57:32,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:32,749 INFO L93 Difference]: Finished difference Result 127 states and 298 transitions. [2020-04-17 22:57:32,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 22:57:32,751 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 22:57:32,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:32,752 INFO L225 Difference]: With dead ends: 127 [2020-04-17 22:57:32,752 INFO L226 Difference]: Without dead ends: 125 [2020-04-17 22:57:32,753 INFO L678 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 [2020-04-17 22:57:32,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-04-17 22:57:32,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 104. [2020-04-17 22:57:32,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-04-17 22:57:32,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-04-17 22:57:32,757 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-04-17 22:57:32,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:32,757 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-04-17 22:57:32,757 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 22:57:32,758 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-04-17 22:57:32,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:32,758 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:32,758 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:32,961 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:32,962 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:32,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:32,962 INFO L82 PathProgramCache]: Analyzing trace with hash 2129172475, now seen corresponding path program 13 times [2020-04-17 22:57:32,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:32,963 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021738692] [2020-04-17 22:57:32,963 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:32,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:33,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:33,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021738692] [2020-04-17 22:57:33,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551661770] [2020-04-17 22:57:33,019 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:33,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:33,061 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:57:33,061 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:33,109 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:33,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:33,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:33,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 22:57:33,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681146014] [2020-04-17 22:57:33,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 22:57:33,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:33,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 22:57:33,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:33,118 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-04-17 22:57:33,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:33,334 INFO L93 Difference]: Finished difference Result 141 states and 334 transitions. [2020-04-17 22:57:33,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 22:57:33,334 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 22:57:33,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:33,335 INFO L225 Difference]: With dead ends: 141 [2020-04-17 22:57:33,336 INFO L226 Difference]: Without dead ends: 136 [2020-04-17 22:57:33,336 INFO L678 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 [2020-04-17 22:57:33,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-04-17 22:57:33,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 104. [2020-04-17 22:57:33,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-04-17 22:57:33,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-04-17 22:57:33,341 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-04-17 22:57:33,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:33,341 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-04-17 22:57:33,341 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 22:57:33,341 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-04-17 22:57:33,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:33,343 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:33,343 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:33,543 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:33,543 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:33,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:33,544 INFO L82 PathProgramCache]: Analyzing trace with hash 2129173436, now seen corresponding path program 14 times [2020-04-17 22:57:33,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:33,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057643569] [2020-04-17 22:57:33,544 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:33,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:33,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:33,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057643569] [2020-04-17 22:57:33,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224340825] [2020-04-17 22:57:33,603 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:33,654 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:57:33,654 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:33,655 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:57:33,657 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:33,699 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:33,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:33,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:33,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 22:57:33,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069878454] [2020-04-17 22:57:33,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 22:57:33,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:33,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 22:57:33,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:33,708 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-04-17 22:57:33,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:33,868 INFO L93 Difference]: Finished difference Result 136 states and 319 transitions. [2020-04-17 22:57:33,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 22:57:33,868 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 22:57:33,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:33,870 INFO L225 Difference]: With dead ends: 136 [2020-04-17 22:57:33,870 INFO L226 Difference]: Without dead ends: 131 [2020-04-17 22:57:33,871 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:57:33,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-04-17 22:57:33,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 101. [2020-04-17 22:57:33,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-04-17 22:57:33,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 245 transitions. [2020-04-17 22:57:33,876 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 245 transitions. Word has length 11 [2020-04-17 22:57:33,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:33,876 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 245 transitions. [2020-04-17 22:57:33,876 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 22:57:33,876 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 245 transitions. [2020-04-17 22:57:33,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:33,877 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:33,877 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:34,080 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:34,080 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:34,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:34,081 INFO L82 PathProgramCache]: Analyzing trace with hash 2129381756, now seen corresponding path program 15 times [2020-04-17 22:57:34,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:34,081 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782701813] [2020-04-17 22:57:34,081 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:34,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:34,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:34,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782701813] [2020-04-17 22:57:34,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667145290] [2020-04-17 22:57:34,137 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:34,185 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 22:57:34,185 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:34,186 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:57:34,186 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:34,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:34,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:34,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 22:57:34,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311863034] [2020-04-17 22:57:34,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 22:57:34,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:34,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 22:57:34,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:34,275 INFO L87 Difference]: Start difference. First operand 101 states and 245 transitions. Second operand 11 states. [2020-04-17 22:57:34,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:34,399 INFO L93 Difference]: Finished difference Result 130 states and 301 transitions. [2020-04-17 22:57:34,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 22:57:34,400 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 22:57:34,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:34,401 INFO L225 Difference]: With dead ends: 130 [2020-04-17 22:57:34,402 INFO L226 Difference]: Without dead ends: 128 [2020-04-17 22:57:34,402 INFO L678 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 [2020-04-17 22:57:34,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-04-17 22:57:34,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 99. [2020-04-17 22:57:34,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-04-17 22:57:34,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-04-17 22:57:34,406 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-04-17 22:57:34,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:34,407 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-04-17 22:57:34,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 22:57:34,407 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-04-17 22:57:34,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:34,407 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:34,408 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:34,610 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:34,611 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:34,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:34,612 INFO L82 PathProgramCache]: Analyzing trace with hash 2130044846, now seen corresponding path program 16 times [2020-04-17 22:57:34,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:34,612 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753287153] [2020-04-17 22:57:34,613 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:34,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:34,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:34,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753287153] [2020-04-17 22:57:34,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251291689] [2020-04-17 22:57:34,659 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:34,709 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:57:34,710 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:34,710 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:57:34,718 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:34,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:34,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:34,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 22:57:34,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125697957] [2020-04-17 22:57:34,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 22:57:34,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:34,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 22:57:34,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:34,786 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-04-17 22:57:34,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:34,930 INFO L93 Difference]: Finished difference Result 131 states and 303 transitions. [2020-04-17 22:57:34,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 22:57:34,931 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 22:57:34,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:34,931 INFO L225 Difference]: With dead ends: 131 [2020-04-17 22:57:34,932 INFO L226 Difference]: Without dead ends: 129 [2020-04-17 22:57:34,932 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:57:34,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-04-17 22:57:34,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 101. [2020-04-17 22:57:34,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-04-17 22:57:34,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-04-17 22:57:34,936 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-04-17 22:57:34,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:34,936 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-04-17 22:57:34,936 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 22:57:34,936 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-04-17 22:57:34,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:34,937 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:34,937 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:35,137 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:35,138 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:35,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:35,138 INFO L82 PathProgramCache]: Analyzing trace with hash 2130066205, now seen corresponding path program 17 times [2020-04-17 22:57:35,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:35,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388907907] [2020-04-17 22:57:35,139 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:35,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:35,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:35,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388907907] [2020-04-17 22:57:35,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404362123] [2020-04-17 22:57:35,200 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:35,239 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:57:35,239 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:35,240 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:57:35,241 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:35,295 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:35,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:35,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:35,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 22:57:35,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384076851] [2020-04-17 22:57:35,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 22:57:35,302 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:35,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 22:57:35,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:35,303 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-04-17 22:57:35,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:35,447 INFO L93 Difference]: Finished difference Result 131 states and 311 transitions. [2020-04-17 22:57:35,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 22:57:35,447 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 22:57:35,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:35,448 INFO L225 Difference]: With dead ends: 131 [2020-04-17 22:57:35,448 INFO L226 Difference]: Without dead ends: 126 [2020-04-17 22:57:35,449 INFO L678 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 [2020-04-17 22:57:35,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-04-17 22:57:35,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 101. [2020-04-17 22:57:35,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-04-17 22:57:35,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-04-17 22:57:35,454 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-04-17 22:57:35,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:35,454 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-04-17 22:57:35,454 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 22:57:35,454 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-04-17 22:57:35,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:35,455 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:35,455 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:35,658 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:35,659 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:35,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:35,660 INFO L82 PathProgramCache]: Analyzing trace with hash 2130067166, now seen corresponding path program 18 times [2020-04-17 22:57:35,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:35,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267775502] [2020-04-17 22:57:35,661 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:35,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:35,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:35,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267775502] [2020-04-17 22:57:35,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501175444] [2020-04-17 22:57:35,706 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:35,746 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 22:57:35,746 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:35,747 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:57:35,748 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:35,808 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:35,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:35,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:35,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 22:57:35,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168923708] [2020-04-17 22:57:35,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 22:57:35,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:35,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 22:57:35,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:35,821 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-04-17 22:57:36,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:36,027 INFO L93 Difference]: Finished difference Result 145 states and 339 transitions. [2020-04-17 22:57:36,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 22:57:36,028 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 22:57:36,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:36,029 INFO L225 Difference]: With dead ends: 145 [2020-04-17 22:57:36,029 INFO L226 Difference]: Without dead ends: 140 [2020-04-17 22:57:36,030 INFO L678 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 [2020-04-17 22:57:36,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-04-17 22:57:36,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 99. [2020-04-17 22:57:36,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-04-17 22:57:36,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-04-17 22:57:36,034 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-04-17 22:57:36,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:36,034 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-04-17 22:57:36,035 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 22:57:36,035 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-04-17 22:57:36,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:36,035 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:36,035 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:36,239 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:36,239 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:36,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:36,239 INFO L82 PathProgramCache]: Analyzing trace with hash 2130095996, now seen corresponding path program 19 times [2020-04-17 22:57:36,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:36,240 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698638848] [2020-04-17 22:57:36,240 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:36,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:36,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:36,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698638848] [2020-04-17 22:57:36,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524870488] [2020-04-17 22:57:36,298 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:36,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:36,354 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:57:36,354 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:36,403 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:36,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:36,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:36,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 22:57:36,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6342761] [2020-04-17 22:57:36,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 22:57:36,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:36,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 22:57:36,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:36,411 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-04-17 22:57:36,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:36,574 INFO L93 Difference]: Finished difference Result 135 states and 315 transitions. [2020-04-17 22:57:36,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 22:57:36,575 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 22:57:36,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:36,576 INFO L225 Difference]: With dead ends: 135 [2020-04-17 22:57:36,576 INFO L226 Difference]: Without dead ends: 130 [2020-04-17 22:57:36,577 INFO L678 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 [2020-04-17 22:57:36,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-04-17 22:57:36,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 98. [2020-04-17 22:57:36,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-04-17 22:57:36,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 231 transitions. [2020-04-17 22:57:36,580 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 231 transitions. Word has length 11 [2020-04-17 22:57:36,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:36,580 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 231 transitions. [2020-04-17 22:57:36,580 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 22:57:36,580 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 231 transitions. [2020-04-17 22:57:36,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:36,581 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:36,581 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:36,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:36,784 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:36,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:36,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1822274800, now seen corresponding path program 4 times [2020-04-17 22:57:36,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:36,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090014436] [2020-04-17 22:57:36,785 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:36,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:36,844 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:36,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090014436] [2020-04-17 22:57:36,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499995126] [2020-04-17 22:57:36,845 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 22:57:36,896 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:57:36,896 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:36,897 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:36,905 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:37,000 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:37,019 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:37,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:37,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-04-17 22:57:37,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81671347] [2020-04-17 22:57:37,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 22:57:37,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:37,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 22:57:37,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-04-17 22:57:37,021 INFO L87 Difference]: Start difference. First operand 98 states and 231 transitions. Second operand 14 states. [2020-04-17 22:57:37,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:37,171 INFO L93 Difference]: Finished difference Result 143 states and 333 transitions. [2020-04-17 22:57:37,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:57:37,172 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2020-04-17 22:57:37,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:37,173 INFO L225 Difference]: With dead ends: 143 [2020-04-17 22:57:37,173 INFO L226 Difference]: Without dead ends: 138 [2020-04-17 22:57:37,174 INFO L678 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 [2020-04-17 22:57:37,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-04-17 22:57:37,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 105. [2020-04-17 22:57:37,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-04-17 22:57:37,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 257 transitions. [2020-04-17 22:57:37,178 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 257 transitions. Word has length 11 [2020-04-17 22:57:37,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:37,179 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 257 transitions. [2020-04-17 22:57:37,179 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 22:57:37,179 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 257 transitions. [2020-04-17 22:57:37,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:37,179 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:37,179 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:37,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:37,383 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:37,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:37,384 INFO L82 PathProgramCache]: Analyzing trace with hash 62604888, now seen corresponding path program 10 times [2020-04-17 22:57:37,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:37,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756737183] [2020-04-17 22:57:37,384 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:37,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:37,499 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:37,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756737183] [2020-04-17 22:57:37,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835285172] [2020-04-17 22:57:37,500 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 22:57:37,537 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:57:37,537 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:37,537 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:37,538 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:37,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:37,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:37,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:37,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741693852] [2020-04-17 22:57:37,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:37,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:37,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:37,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:37,629 INFO L87 Difference]: Start difference. First operand 105 states and 257 transitions. Second operand 13 states. [2020-04-17 22:57:37,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:37,683 INFO L93 Difference]: Finished difference Result 132 states and 311 transitions. [2020-04-17 22:57:37,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 22:57:37,683 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-04-17 22:57:37,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:37,685 INFO L225 Difference]: With dead ends: 132 [2020-04-17 22:57:37,685 INFO L226 Difference]: Without dead ends: 129 [2020-04-17 22:57:37,685 INFO L678 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 [2020-04-17 22:57:37,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-04-17 22:57:37,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 110. [2020-04-17 22:57:37,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-04-17 22:57:37,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-04-17 22:57:37,690 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-04-17 22:57:37,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:37,690 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-04-17 22:57:37,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:37,690 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-04-17 22:57:37,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:37,691 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:37,691 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:37,894 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:37,894 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:37,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:37,894 INFO L82 PathProgramCache]: Analyzing trace with hash 727540008, now seen corresponding path program 11 times [2020-04-17 22:57:37,895 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:37,895 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440269355] [2020-04-17 22:57:37,895 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:37,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:37,972 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:37,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440269355] [2020-04-17 22:57:37,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518619173] [2020-04-17 22:57:37,973 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:38,014 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 22:57:38,014 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:38,015 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:38,016 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:38,096 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:38,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:38,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:38,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551860898] [2020-04-17 22:57:38,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:38,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:38,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:38,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:38,098 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-04-17 22:57:38,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:38,171 INFO L93 Difference]: Finished difference Result 143 states and 332 transitions. [2020-04-17 22:57:38,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 22:57:38,172 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-04-17 22:57:38,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:38,173 INFO L225 Difference]: With dead ends: 143 [2020-04-17 22:57:38,173 INFO L226 Difference]: Without dead ends: 140 [2020-04-17 22:57:38,173 INFO L678 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 [2020-04-17 22:57:38,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-04-17 22:57:38,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 110. [2020-04-17 22:57:38,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-04-17 22:57:38,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-04-17 22:57:38,177 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-04-17 22:57:38,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:38,177 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-04-17 22:57:38,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:38,178 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-04-17 22:57:38,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:38,178 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:38,178 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:38,382 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:38,382 INFO L427 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:38,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:38,383 INFO L82 PathProgramCache]: Analyzing trace with hash 748989528, now seen corresponding path program 12 times [2020-04-17 22:57:38,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:38,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750478814] [2020-04-17 22:57:38,384 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:38,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:38,458 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:38,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750478814] [2020-04-17 22:57:38,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520562195] [2020-04-17 22:57:38,459 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:38,503 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 22:57:38,504 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:38,504 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:38,505 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:38,574 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:38,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:38,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:38,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462456609] [2020-04-17 22:57:38,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:38,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:38,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:38,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:38,575 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-04-17 22:57:38,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:38,657 INFO L93 Difference]: Finished difference Result 142 states and 332 transitions. [2020-04-17 22:57:38,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 22:57:38,657 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-04-17 22:57:38,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:38,659 INFO L225 Difference]: With dead ends: 142 [2020-04-17 22:57:38,659 INFO L226 Difference]: Without dead ends: 139 [2020-04-17 22:57:38,660 INFO L678 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 [2020-04-17 22:57:38,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-04-17 22:57:38,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 112. [2020-04-17 22:57:38,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-04-17 22:57:38,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 275 transitions. [2020-04-17 22:57:38,664 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 275 transitions. Word has length 11 [2020-04-17 22:57:38,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:38,664 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 275 transitions. [2020-04-17 22:57:38,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:38,664 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 275 transitions. [2020-04-17 22:57:38,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:38,665 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:38,665 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:38,868 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:38,869 INFO L427 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:38,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:38,869 INFO L82 PathProgramCache]: Analyzing trace with hash 749681448, now seen corresponding path program 13 times [2020-04-17 22:57:38,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:38,870 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11732976] [2020-04-17 22:57:38,870 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:38,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:38,933 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:38,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11732976] [2020-04-17 22:57:38,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764588143] [2020-04-17 22:57:38,934 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:38,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:38,981 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:38,982 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:39,136 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:39,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:39,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:39,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331272637] [2020-04-17 22:57:39,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:39,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:39,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:39,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:39,137 INFO L87 Difference]: Start difference. First operand 112 states and 275 transitions. Second operand 13 states. [2020-04-17 22:57:39,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:39,263 INFO L93 Difference]: Finished difference Result 141 states and 332 transitions. [2020-04-17 22:57:39,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 22:57:39,264 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-04-17 22:57:39,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:39,265 INFO L225 Difference]: With dead ends: 141 [2020-04-17 22:57:39,265 INFO L226 Difference]: Without dead ends: 138 [2020-04-17 22:57:39,265 INFO L678 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 [2020-04-17 22:57:39,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-04-17 22:57:39,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 114. [2020-04-17 22:57:39,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-04-17 22:57:39,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 282 transitions. [2020-04-17 22:57:39,270 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 282 transitions. Word has length 11 [2020-04-17 22:57:39,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:39,271 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 282 transitions. [2020-04-17 22:57:39,271 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:39,271 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 282 transitions. [2020-04-17 22:57:39,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:39,272 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:39,272 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:39,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:39,477 INFO L427 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:39,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:39,477 INFO L82 PathProgramCache]: Analyzing trace with hash 749703768, now seen corresponding path program 14 times [2020-04-17 22:57:39,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:39,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231776737] [2020-04-17 22:57:39,478 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:39,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:39,563 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:39,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231776737] [2020-04-17 22:57:39,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777836001] [2020-04-17 22:57:39,563 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:39,634 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:57:39,634 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:39,636 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:39,638 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:39,742 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:39,761 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:39,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:39,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:39,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955704070] [2020-04-17 22:57:39,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:39,763 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:39,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:39,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:39,764 INFO L87 Difference]: Start difference. First operand 114 states and 282 transitions. Second operand 13 states. [2020-04-17 22:57:39,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:39,910 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-04-17 22:57:39,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:57:39,910 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-04-17 22:57:39,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:39,911 INFO L225 Difference]: With dead ends: 150 [2020-04-17 22:57:39,912 INFO L226 Difference]: Without dead ends: 144 [2020-04-17 22:57:39,912 INFO L678 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 [2020-04-17 22:57:39,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-04-17 22:57:39,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 113. [2020-04-17 22:57:39,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-04-17 22:57:39,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 282 transitions. [2020-04-17 22:57:39,916 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 282 transitions. Word has length 11 [2020-04-17 22:57:39,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:39,916 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 282 transitions. [2020-04-17 22:57:39,916 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:39,916 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 282 transitions. [2020-04-17 22:57:39,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:39,917 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:39,917 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:40,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:40,121 INFO L427 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:40,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:40,122 INFO L82 PathProgramCache]: Analyzing trace with hash 920465749, now seen corresponding path program 20 times [2020-04-17 22:57:40,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:40,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611920512] [2020-04-17 22:57:40,123 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:40,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:40,203 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:40,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611920512] [2020-04-17 22:57:40,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280856150] [2020-04-17 22:57:40,204 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:40,252 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:57:40,252 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:40,253 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:40,254 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:40,351 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:40,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:40,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:40,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551000930] [2020-04-17 22:57:40,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:40,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:40,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:40,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:40,353 INFO L87 Difference]: Start difference. First operand 113 states and 282 transitions. Second operand 13 states. [2020-04-17 22:57:40,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:40,401 INFO L93 Difference]: Finished difference Result 138 states and 332 transitions. [2020-04-17 22:57:40,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 22:57:40,401 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:40,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:40,402 INFO L225 Difference]: With dead ends: 138 [2020-04-17 22:57:40,402 INFO L226 Difference]: Without dead ends: 136 [2020-04-17 22:57:40,403 INFO L678 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 [2020-04-17 22:57:40,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-04-17 22:57:40,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 117. [2020-04-17 22:57:40,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-04-17 22:57:40,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 294 transitions. [2020-04-17 22:57:40,405 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 294 transitions. Word has length 12 [2020-04-17 22:57:40,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:40,406 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 294 transitions. [2020-04-17 22:57:40,406 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:40,406 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 294 transitions. [2020-04-17 22:57:40,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:40,406 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:40,406 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:40,607 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:40,607 INFO L427 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:40,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:40,608 INFO L82 PathProgramCache]: Analyzing trace with hash 920466710, now seen corresponding path program 21 times [2020-04-17 22:57:40,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:40,608 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887809211] [2020-04-17 22:57:40,608 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:40,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:40,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:40,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887809211] [2020-04-17 22:57:40,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138558447] [2020-04-17 22:57:40,684 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:40,729 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 22:57:40,729 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:40,730 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:40,730 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:40,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:40,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:40,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:40,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833581399] [2020-04-17 22:57:40,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:40,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:40,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:40,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:40,814 INFO L87 Difference]: Start difference. First operand 117 states and 294 transitions. Second operand 13 states. [2020-04-17 22:57:40,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:40,926 INFO L93 Difference]: Finished difference Result 145 states and 346 transitions. [2020-04-17 22:57:40,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 22:57:40,926 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:40,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:40,928 INFO L225 Difference]: With dead ends: 145 [2020-04-17 22:57:40,928 INFO L226 Difference]: Without dead ends: 143 [2020-04-17 22:57:40,929 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:57:40,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-04-17 22:57:40,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 115. [2020-04-17 22:57:40,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-04-17 22:57:40,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 288 transitions. [2020-04-17 22:57:40,933 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 288 transitions. Word has length 12 [2020-04-17 22:57:40,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:40,933 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 288 transitions. [2020-04-17 22:57:40,933 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:40,933 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 288 transitions. [2020-04-17 22:57:40,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:40,934 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:40,934 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:41,136 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:41,137 INFO L427 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:41,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:41,138 INFO L82 PathProgramCache]: Analyzing trace with hash 920495540, now seen corresponding path program 22 times [2020-04-17 22:57:41,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:41,138 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654129048] [2020-04-17 22:57:41,138 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:41,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:41,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:41,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654129048] [2020-04-17 22:57:41,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091079981] [2020-04-17 22:57:41,205 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:41,255 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:57:41,255 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:41,256 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:41,257 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:41,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:41,342 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:41,342 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:41,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499475687] [2020-04-17 22:57:41,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:41,343 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:41,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:41,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:41,344 INFO L87 Difference]: Start difference. First operand 115 states and 288 transitions. Second operand 13 states. [2020-04-17 22:57:41,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:41,504 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-04-17 22:57:41,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 22:57:41,505 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:41,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:41,506 INFO L225 Difference]: With dead ends: 150 [2020-04-17 22:57:41,506 INFO L226 Difference]: Without dead ends: 148 [2020-04-17 22:57:41,507 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:57:41,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-04-17 22:57:41,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 116. [2020-04-17 22:57:41,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-04-17 22:57:41,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 289 transitions. [2020-04-17 22:57:41,512 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 289 transitions. Word has length 12 [2020-04-17 22:57:41,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:41,512 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 289 transitions. [2020-04-17 22:57:41,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:41,513 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 289 transitions. [2020-04-17 22:57:41,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:41,514 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:41,514 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:41,719 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:41,719 INFO L427 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:41,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:41,720 INFO L82 PathProgramCache]: Analyzing trace with hash 921389270, now seen corresponding path program 23 times [2020-04-17 22:57:41,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:41,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10781730] [2020-04-17 22:57:41,720 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:41,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:41,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:41,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10781730] [2020-04-17 22:57:41,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548418901] [2020-04-17 22:57:41,796 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:41,840 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 22:57:41,840 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:41,841 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:41,842 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:41,936 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:41,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:41,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:41,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262232675] [2020-04-17 22:57:41,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:41,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:41,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:41,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:41,937 INFO L87 Difference]: Start difference. First operand 116 states and 289 transitions. Second operand 13 states. [2020-04-17 22:57:42,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:42,063 INFO L93 Difference]: Finished difference Result 148 states and 352 transitions. [2020-04-17 22:57:42,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 22:57:42,064 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:42,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:42,065 INFO L225 Difference]: With dead ends: 148 [2020-04-17 22:57:42,065 INFO L226 Difference]: Without dead ends: 146 [2020-04-17 22:57:42,066 INFO L678 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 [2020-04-17 22:57:42,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-04-17 22:57:42,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 120. [2020-04-17 22:57:42,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-04-17 22:57:42,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-04-17 22:57:42,069 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-04-17 22:57:42,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:42,069 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-04-17 22:57:42,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:42,070 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-04-17 22:57:42,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:42,071 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:42,071 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:42,274 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:42,275 INFO L427 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:42,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:42,275 INFO L82 PathProgramCache]: Analyzing trace with hash 921390231, now seen corresponding path program 24 times [2020-04-17 22:57:42,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:42,276 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228273711] [2020-04-17 22:57:42,276 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:42,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:42,347 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:42,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228273711] [2020-04-17 22:57:42,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985068028] [2020-04-17 22:57:42,347 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:42,389 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 22:57:42,390 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:42,390 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:42,391 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:42,496 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:42,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:42,497 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:42,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050593345] [2020-04-17 22:57:42,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:42,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:42,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:42,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:42,498 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-04-17 22:57:42,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:42,607 INFO L93 Difference]: Finished difference Result 149 states and 354 transitions. [2020-04-17 22:57:42,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 22:57:42,607 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:42,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:42,608 INFO L225 Difference]: With dead ends: 149 [2020-04-17 22:57:42,609 INFO L226 Difference]: Without dead ends: 147 [2020-04-17 22:57:42,609 INFO L678 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 [2020-04-17 22:57:42,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-04-17 22:57:42,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 118. [2020-04-17 22:57:42,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-04-17 22:57:42,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 293 transitions. [2020-04-17 22:57:42,614 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 293 transitions. Word has length 12 [2020-04-17 22:57:42,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:42,614 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 293 transitions. [2020-04-17 22:57:42,614 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:42,614 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 293 transitions. [2020-04-17 22:57:42,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:42,615 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:42,615 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:42,818 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:42,818 INFO L427 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:42,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:42,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1557695239, now seen corresponding path program 25 times [2020-04-17 22:57:42,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:42,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707263254] [2020-04-17 22:57:42,820 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:42,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:42,893 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:42,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707263254] [2020-04-17 22:57:42,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881624820] [2020-04-17 22:57:42,894 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:42,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:42,931 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:42,932 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:43,016 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:43,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:43,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:43,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613498938] [2020-04-17 22:57:43,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:43,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:43,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:43,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:43,018 INFO L87 Difference]: Start difference. First operand 118 states and 293 transitions. Second operand 13 states. [2020-04-17 22:57:43,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:43,091 INFO L93 Difference]: Finished difference Result 152 states and 360 transitions. [2020-04-17 22:57:43,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 22:57:43,091 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:43,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:43,092 INFO L225 Difference]: With dead ends: 152 [2020-04-17 22:57:43,092 INFO L226 Difference]: Without dead ends: 150 [2020-04-17 22:57:43,093 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-04-17 22:57:43,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-04-17 22:57:43,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 122. [2020-04-17 22:57:43,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-04-17 22:57:43,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 305 transitions. [2020-04-17 22:57:43,097 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 305 transitions. Word has length 12 [2020-04-17 22:57:43,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:43,097 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 305 transitions. [2020-04-17 22:57:43,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:43,097 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 305 transitions. [2020-04-17 22:57:43,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:43,098 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:43,098 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:43,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:43,299 INFO L427 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:43,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:43,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1557696200, now seen corresponding path program 26 times [2020-04-17 22:57:43,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:43,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044572008] [2020-04-17 22:57:43,300 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:43,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:43,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:43,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044572008] [2020-04-17 22:57:43,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131065991] [2020-04-17 22:57:43,379 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:43,422 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:57:43,422 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:43,423 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:43,424 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:43,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:43,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:43,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:43,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330884740] [2020-04-17 22:57:43,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:43,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:43,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:43,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:43,530 INFO L87 Difference]: Start difference. First operand 122 states and 305 transitions. Second operand 13 states. [2020-04-17 22:57:43,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:43,664 INFO L93 Difference]: Finished difference Result 153 states and 361 transitions. [2020-04-17 22:57:43,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 22:57:43,664 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:43,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:43,666 INFO L225 Difference]: With dead ends: 153 [2020-04-17 22:57:43,666 INFO L226 Difference]: Without dead ends: 151 [2020-04-17 22:57:43,666 INFO L678 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 [2020-04-17 22:57:43,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-04-17 22:57:43,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 120. [2020-04-17 22:57:43,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-04-17 22:57:43,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-04-17 22:57:43,670 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-04-17 22:57:43,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:43,670 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-04-17 22:57:43,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:43,670 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-04-17 22:57:43,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:43,671 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:43,671 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:43,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:43,872 INFO L427 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:43,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:43,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1557725030, now seen corresponding path program 27 times [2020-04-17 22:57:43,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:43,872 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343558714] [2020-04-17 22:57:43,872 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:43,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:43,935 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:43,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343558714] [2020-04-17 22:57:43,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701708596] [2020-04-17 22:57:43,936 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:43,973 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 22:57:43,974 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:43,974 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:43,975 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:44,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:44,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:44,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:44,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861883025] [2020-04-17 22:57:44,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:44,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:44,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:44,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:44,055 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-04-17 22:57:44,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:44,201 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-04-17 22:57:44,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 22:57:44,202 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:44,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:44,203 INFO L225 Difference]: With dead ends: 156 [2020-04-17 22:57:44,203 INFO L226 Difference]: Without dead ends: 154 [2020-04-17 22:57:44,203 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-04-17 22:57:44,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-04-17 22:57:44,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 119. [2020-04-17 22:57:44,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-04-17 22:57:44,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 295 transitions. [2020-04-17 22:57:44,207 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 295 transitions. Word has length 12 [2020-04-17 22:57:44,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:44,208 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 295 transitions. [2020-04-17 22:57:44,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:44,208 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 295 transitions. [2020-04-17 22:57:44,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:44,208 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:44,208 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:44,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:44,409 INFO L427 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:44,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:44,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1578251029, now seen corresponding path program 28 times [2020-04-17 22:57:44,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:44,410 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135185813] [2020-04-17 22:57:44,411 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:44,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:44,486 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:44,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135185813] [2020-04-17 22:57:44,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924139408] [2020-04-17 22:57:44,486 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:44,527 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:57:44,527 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:44,528 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:44,528 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:44,617 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:44,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:44,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:44,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093666279] [2020-04-17 22:57:44,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:44,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:44,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:44,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:44,618 INFO L87 Difference]: Start difference. First operand 119 states and 295 transitions. Second operand 13 states. [2020-04-17 22:57:44,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:44,717 INFO L93 Difference]: Finished difference Result 148 states and 351 transitions. [2020-04-17 22:57:44,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 22:57:44,718 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:44,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:44,719 INFO L225 Difference]: With dead ends: 148 [2020-04-17 22:57:44,719 INFO L226 Difference]: Without dead ends: 146 [2020-04-17 22:57:44,719 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:57:44,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-04-17 22:57:44,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 121. [2020-04-17 22:57:44,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-04-17 22:57:44,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-04-17 22:57:44,723 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-04-17 22:57:44,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:44,723 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-04-17 22:57:44,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:44,723 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-04-17 22:57:44,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:44,724 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:44,724 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:44,927 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:44,927 INFO L427 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:44,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:44,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1578251990, now seen corresponding path program 29 times [2020-04-17 22:57:44,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:44,928 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707003053] [2020-04-17 22:57:44,928 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:44,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:44,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:44,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707003053] [2020-04-17 22:57:44,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348661960] [2020-04-17 22:57:44,992 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:45,031 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:57:45,031 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:45,032 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:45,033 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:45,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:45,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:45,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:45,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183482696] [2020-04-17 22:57:45,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:45,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:45,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:45,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:45,129 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-04-17 22:57:45,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:45,288 INFO L93 Difference]: Finished difference Result 157 states and 368 transitions. [2020-04-17 22:57:45,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:57:45,288 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:45,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:45,289 INFO L225 Difference]: With dead ends: 157 [2020-04-17 22:57:45,289 INFO L226 Difference]: Without dead ends: 155 [2020-04-17 22:57:45,290 INFO L678 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 [2020-04-17 22:57:45,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-04-17 22:57:45,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 120. [2020-04-17 22:57:45,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-04-17 22:57:45,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 297 transitions. [2020-04-17 22:57:45,294 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 297 transitions. Word has length 12 [2020-04-17 22:57:45,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:45,294 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 297 transitions. [2020-04-17 22:57:45,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:45,295 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 297 transitions. [2020-04-17 22:57:45,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:45,295 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:45,295 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:45,498 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:45,499 INFO L427 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:45,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:45,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1578914119, now seen corresponding path program 30 times [2020-04-17 22:57:45,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:45,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28985018] [2020-04-17 22:57:45,500 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:45,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:45,569 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:45,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28985018] [2020-04-17 22:57:45,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142033977] [2020-04-17 22:57:45,570 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:45,608 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 22:57:45,608 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:45,609 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:45,609 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:45,698 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:45,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:45,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:45,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195630595] [2020-04-17 22:57:45,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:45,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:45,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:45,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:45,699 INFO L87 Difference]: Start difference. First operand 120 states and 297 transitions. Second operand 13 states. [2020-04-17 22:57:45,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:45,809 INFO L93 Difference]: Finished difference Result 149 states and 350 transitions. [2020-04-17 22:57:45,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 22:57:45,809 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:45,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:45,811 INFO L225 Difference]: With dead ends: 149 [2020-04-17 22:57:45,811 INFO L226 Difference]: Without dead ends: 147 [2020-04-17 22:57:45,811 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:57:45,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-04-17 22:57:45,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 124. [2020-04-17 22:57:45,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-04-17 22:57:45,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-04-17 22:57:45,816 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-04-17 22:57:45,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:45,816 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-04-17 22:57:45,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:45,816 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-04-17 22:57:45,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:45,817 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:45,817 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:46,019 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:46,020 INFO L427 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:46,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:46,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1578936439, now seen corresponding path program 31 times [2020-04-17 22:57:46,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:46,021 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008742271] [2020-04-17 22:57:46,021 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:46,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:46,088 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:46,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008742271] [2020-04-17 22:57:46,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736521835] [2020-04-17 22:57:46,088 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:46,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:46,131 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:46,132 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:46,203 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:46,226 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:46,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:46,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:46,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893604066] [2020-04-17 22:57:46,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:46,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:46,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:46,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:46,227 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-04-17 22:57:46,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:46,475 INFO L93 Difference]: Finished difference Result 164 states and 389 transitions. [2020-04-17 22:57:46,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:57:46,475 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:46,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:46,477 INFO L225 Difference]: With dead ends: 164 [2020-04-17 22:57:46,477 INFO L226 Difference]: Without dead ends: 159 [2020-04-17 22:57:46,478 INFO L678 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 [2020-04-17 22:57:46,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-04-17 22:57:46,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-04-17 22:57:46,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-04-17 22:57:46,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 296 transitions. [2020-04-17 22:57:46,482 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 296 transitions. Word has length 12 [2020-04-17 22:57:46,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:46,482 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 296 transitions. [2020-04-17 22:57:46,482 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:46,482 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 296 transitions. [2020-04-17 22:57:46,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:46,483 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:46,483 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:46,686 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:46,687 INFO L427 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:46,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:46,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1578943910, now seen corresponding path program 32 times [2020-04-17 22:57:46,688 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:46,688 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153059549] [2020-04-17 22:57:46,688 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:46,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:46,741 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:46,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153059549] [2020-04-17 22:57:46,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474674785] [2020-04-17 22:57:46,742 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:46,812 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:57:46,812 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:46,813 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:46,814 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:46,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:46,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:46,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:46,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622665798] [2020-04-17 22:57:46,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:46,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:46,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:46,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:46,916 INFO L87 Difference]: Start difference. First operand 122 states and 296 transitions. Second operand 13 states. [2020-04-17 22:57:47,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:47,097 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-04-17 22:57:47,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 22:57:47,098 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:47,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:47,099 INFO L225 Difference]: With dead ends: 156 [2020-04-17 22:57:47,099 INFO L226 Difference]: Without dead ends: 154 [2020-04-17 22:57:47,099 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2020-04-17 22:57:47,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-04-17 22:57:47,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 124. [2020-04-17 22:57:47,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-04-17 22:57:47,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-04-17 22:57:47,104 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-04-17 22:57:47,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:47,104 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-04-17 22:57:47,104 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:47,104 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-04-17 22:57:47,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:47,105 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:47,105 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:47,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:47,308 INFO L427 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:47,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:47,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1578965269, now seen corresponding path program 33 times [2020-04-17 22:57:47,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:47,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199721233] [2020-04-17 22:57:47,310 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:47,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:47,374 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:47,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199721233] [2020-04-17 22:57:47,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924332090] [2020-04-17 22:57:47,374 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:47,421 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 22:57:47,421 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:47,422 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:47,423 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:47,558 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:47,587 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:47,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:47,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:47,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865596689] [2020-04-17 22:57:47,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:47,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:47,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:47,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:47,589 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-04-17 22:57:47,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:47,980 INFO L93 Difference]: Finished difference Result 176 states and 416 transitions. [2020-04-17 22:57:47,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 22:57:47,981 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:47,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:47,982 INFO L225 Difference]: With dead ends: 176 [2020-04-17 22:57:47,983 INFO L226 Difference]: Without dead ends: 171 [2020-04-17 22:57:47,983 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=186, Invalid=366, Unknown=0, NotChecked=0, Total=552 [2020-04-17 22:57:47,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-04-17 22:57:47,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 124. [2020-04-17 22:57:47,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-04-17 22:57:47,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-04-17 22:57:47,987 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-04-17 22:57:47,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:47,987 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-04-17 22:57:47,987 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:47,987 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-04-17 22:57:47,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:47,988 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:47,988 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:48,191 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:48,191 INFO L427 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:48,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:48,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1578966230, now seen corresponding path program 34 times [2020-04-17 22:57:48,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:48,192 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316460742] [2020-04-17 22:57:48,192 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:48,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:48,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:48,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316460742] [2020-04-17 22:57:48,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760848897] [2020-04-17 22:57:48,244 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:48,290 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:57:48,290 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:48,291 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:48,292 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:48,380 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:48,393 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:48,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:48,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:48,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088656468] [2020-04-17 22:57:48,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:48,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:48,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:48,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:48,395 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-04-17 22:57:48,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:48,623 INFO L93 Difference]: Finished difference Result 166 states and 393 transitions. [2020-04-17 22:57:48,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:57:48,623 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:48,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:48,624 INFO L225 Difference]: With dead ends: 166 [2020-04-17 22:57:48,625 INFO L226 Difference]: Without dead ends: 161 [2020-04-17 22:57:48,625 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-04-17 22:57:48,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-04-17 22:57:48,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 121. [2020-04-17 22:57:48,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-04-17 22:57:48,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 294 transitions. [2020-04-17 22:57:48,628 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 294 transitions. Word has length 12 [2020-04-17 22:57:48,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:48,628 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 294 transitions. [2020-04-17 22:57:48,629 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:48,629 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 294 transitions. [2020-04-17 22:57:48,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:48,629 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:48,629 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:48,832 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:48,832 INFO L427 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:48,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:48,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1579174550, now seen corresponding path program 35 times [2020-04-17 22:57:48,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:48,833 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568633252] [2020-04-17 22:57:48,833 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:48,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:48,894 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:48,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568633252] [2020-04-17 22:57:48,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088653908] [2020-04-17 22:57:48,894 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:48,936 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:57:48,936 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:48,937 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:48,938 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:49,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:49,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:49,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:49,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631553712] [2020-04-17 22:57:49,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:49,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:49,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:49,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:49,039 INFO L87 Difference]: Start difference. First operand 121 states and 294 transitions. Second operand 13 states. [2020-04-17 22:57:49,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:49,225 INFO L93 Difference]: Finished difference Result 163 states and 379 transitions. [2020-04-17 22:57:49,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:57:49,225 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:49,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:49,227 INFO L225 Difference]: With dead ends: 163 [2020-04-17 22:57:49,227 INFO L226 Difference]: Without dead ends: 161 [2020-04-17 22:57:49,227 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-04-17 22:57:49,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-04-17 22:57:49,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 123. [2020-04-17 22:57:49,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-04-17 22:57:49,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 301 transitions. [2020-04-17 22:57:49,232 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 301 transitions. Word has length 12 [2020-04-17 22:57:49,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:49,232 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 301 transitions. [2020-04-17 22:57:49,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:49,232 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 301 transitions. [2020-04-17 22:57:49,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:49,233 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:49,233 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:49,436 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:49,436 INFO L427 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:49,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:49,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1579837640, now seen corresponding path program 36 times [2020-04-17 22:57:49,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:49,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897757609] [2020-04-17 22:57:49,437 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:49,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:49,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:49,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897757609] [2020-04-17 22:57:49,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836291361] [2020-04-17 22:57:49,495 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:49,555 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 22:57:49,555 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:49,556 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:49,556 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:49,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:49,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:49,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:49,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378710799] [2020-04-17 22:57:49,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:49,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:49,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:49,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:49,654 INFO L87 Difference]: Start difference. First operand 123 states and 301 transitions. Second operand 13 states. [2020-04-17 22:57:49,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:49,883 INFO L93 Difference]: Finished difference Result 170 states and 399 transitions. [2020-04-17 22:57:49,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 22:57:49,883 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:49,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:49,884 INFO L225 Difference]: With dead ends: 170 [2020-04-17 22:57:49,884 INFO L226 Difference]: Without dead ends: 168 [2020-04-17 22:57:49,885 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2020-04-17 22:57:49,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-04-17 22:57:49,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 125. [2020-04-17 22:57:49,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-04-17 22:57:49,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 308 transitions. [2020-04-17 22:57:49,889 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 308 transitions. Word has length 12 [2020-04-17 22:57:49,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:49,889 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 308 transitions. [2020-04-17 22:57:49,889 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:49,889 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 308 transitions. [2020-04-17 22:57:49,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:49,890 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:49,890 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:50,093 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:50,093 INFO L427 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:50,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:50,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1579858999, now seen corresponding path program 37 times [2020-04-17 22:57:50,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:50,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903427229] [2020-04-17 22:57:50,095 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:50,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:50,148 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:50,148 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903427229] [2020-04-17 22:57:50,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951435263] [2020-04-17 22:57:50,149 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:50,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:50,191 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:50,191 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:50,247 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:50,253 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:50,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:50,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:50,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88165610] [2020-04-17 22:57:50,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:50,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:50,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:50,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:50,256 INFO L87 Difference]: Start difference. First operand 125 states and 308 transitions. Second operand 13 states. [2020-04-17 22:57:50,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:50,533 INFO L93 Difference]: Finished difference Result 177 states and 424 transitions. [2020-04-17 22:57:50,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 22:57:50,533 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:50,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:50,535 INFO L225 Difference]: With dead ends: 177 [2020-04-17 22:57:50,535 INFO L226 Difference]: Without dead ends: 172 [2020-04-17 22:57:50,535 INFO L678 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 [2020-04-17 22:57:50,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-04-17 22:57:50,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 126. [2020-04-17 22:57:50,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-04-17 22:57:50,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 313 transitions. [2020-04-17 22:57:50,540 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 313 transitions. Word has length 12 [2020-04-17 22:57:50,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:50,540 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 313 transitions. [2020-04-17 22:57:50,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:50,540 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 313 transitions. [2020-04-17 22:57:50,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:50,541 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:50,541 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:50,744 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:50,744 INFO L427 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:50,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:50,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1579859960, now seen corresponding path program 38 times [2020-04-17 22:57:50,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:50,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789003315] [2020-04-17 22:57:50,746 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:50,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:50,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:50,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789003315] [2020-04-17 22:57:50,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392054252] [2020-04-17 22:57:50,799 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:50,845 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:57:50,845 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:50,845 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:50,846 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:50,911 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:50,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:50,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:50,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:50,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62312408] [2020-04-17 22:57:50,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:50,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:50,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:50,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:50,920 INFO L87 Difference]: Start difference. First operand 126 states and 313 transitions. Second operand 13 states. [2020-04-17 22:57:51,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:51,263 INFO L93 Difference]: Finished difference Result 190 states and 454 transitions. [2020-04-17 22:57:51,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 22:57:51,264 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:51,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:51,265 INFO L225 Difference]: With dead ends: 190 [2020-04-17 22:57:51,265 INFO L226 Difference]: Without dead ends: 182 [2020-04-17 22:57:51,266 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-04-17 22:57:51,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-04-17 22:57:51,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 121. [2020-04-17 22:57:51,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-04-17 22:57:51,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 297 transitions. [2020-04-17 22:57:51,269 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 297 transitions. Word has length 12 [2020-04-17 22:57:51,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:51,270 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 297 transitions. [2020-04-17 22:57:51,270 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:51,270 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 297 transitions. [2020-04-17 22:57:51,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:51,270 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:51,271 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:51,473 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:51,474 INFO L427 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:51,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:51,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1579888790, now seen corresponding path program 39 times [2020-04-17 22:57:51,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:51,475 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757190701] [2020-04-17 22:57:51,475 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:51,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:51,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:51,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757190701] [2020-04-17 22:57:51,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058536783] [2020-04-17 22:57:51,536 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:51,582 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 22:57:51,582 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:51,583 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:51,584 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:51,648 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:51,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:51,660 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:51,660 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:51,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787765685] [2020-04-17 22:57:51,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:51,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:51,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:51,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:51,660 INFO L87 Difference]: Start difference. First operand 121 states and 297 transitions. Second operand 13 states. [2020-04-17 22:57:51,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:51,996 INFO L93 Difference]: Finished difference Result 180 states and 427 transitions. [2020-04-17 22:57:51,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 22:57:51,996 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:51,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:51,998 INFO L225 Difference]: With dead ends: 180 [2020-04-17 22:57:51,998 INFO L226 Difference]: Without dead ends: 175 [2020-04-17 22:57:51,998 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-04-17 22:57:51,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-04-17 22:57:52,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 120. [2020-04-17 22:57:52,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-04-17 22:57:52,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 292 transitions. [2020-04-17 22:57:52,001 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 292 transitions. Word has length 12 [2020-04-17 22:57:52,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:52,002 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 292 transitions. [2020-04-17 22:57:52,002 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:52,002 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 292 transitions. [2020-04-17 22:57:52,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:52,002 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:52,002 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:52,205 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:52,206 INFO L427 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:52,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:52,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1586324390, now seen corresponding path program 40 times [2020-04-17 22:57:52,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:52,206 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074341419] [2020-04-17 22:57:52,206 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:52,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:52,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:52,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074341419] [2020-04-17 22:57:52,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029919166] [2020-04-17 22:57:52,266 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:52,306 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:57:52,306 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:52,307 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:52,307 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:52,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:52,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:52,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:52,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638205493] [2020-04-17 22:57:52,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:52,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:52,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:52,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:52,387 INFO L87 Difference]: Start difference. First operand 120 states and 292 transitions. Second operand 13 states. [2020-04-17 22:57:52,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:52,519 INFO L93 Difference]: Finished difference Result 164 states and 379 transitions. [2020-04-17 22:57:52,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:57:52,520 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:52,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:52,521 INFO L225 Difference]: With dead ends: 164 [2020-04-17 22:57:52,522 INFO L226 Difference]: Without dead ends: 162 [2020-04-17 22:57:52,522 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2020-04-17 22:57:52,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-04-17 22:57:52,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 121. [2020-04-17 22:57:52,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-04-17 22:57:52,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 295 transitions. [2020-04-17 22:57:52,526 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 295 transitions. Word has length 12 [2020-04-17 22:57:52,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:52,527 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 295 transitions. [2020-04-17 22:57:52,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:52,527 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 295 transitions. [2020-04-17 22:57:52,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:52,527 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:52,527 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:52,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:52,731 INFO L427 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:52,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:52,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1586325351, now seen corresponding path program 41 times [2020-04-17 22:57:52,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:52,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773132419] [2020-04-17 22:57:52,733 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:52,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:52,789 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:52,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773132419] [2020-04-17 22:57:52,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938018847] [2020-04-17 22:57:52,790 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:52,833 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:57:52,833 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:52,834 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:52,835 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:52,918 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:52,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:52,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:52,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804201602] [2020-04-17 22:57:52,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:52,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:52,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:52,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:52,920 INFO L87 Difference]: Start difference. First operand 121 states and 295 transitions. Second operand 13 states. [2020-04-17 22:57:53,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:53,081 INFO L93 Difference]: Finished difference Result 161 states and 372 transitions. [2020-04-17 22:57:53,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 22:57:53,081 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:53,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:53,083 INFO L225 Difference]: With dead ends: 161 [2020-04-17 22:57:53,083 INFO L226 Difference]: Without dead ends: 159 [2020-04-17 22:57:53,083 INFO L678 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 [2020-04-17 22:57:53,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-04-17 22:57:53,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 118. [2020-04-17 22:57:53,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-04-17 22:57:53,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 287 transitions. [2020-04-17 22:57:53,087 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 287 transitions. Word has length 12 [2020-04-17 22:57:53,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:53,087 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 287 transitions. [2020-04-17 22:57:53,087 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:53,087 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 287 transitions. [2020-04-17 22:57:53,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:53,088 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:53,088 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:53,291 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:53,291 INFO L427 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:53,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:53,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1606880180, now seen corresponding path program 42 times [2020-04-17 22:57:53,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:53,292 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471911834] [2020-04-17 22:57:53,292 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:53,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:53,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:53,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471911834] [2020-04-17 22:57:53,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113937802] [2020-04-17 22:57:53,346 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:53,396 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 22:57:53,397 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:53,397 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:53,398 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:53,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:53,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:53,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:53,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074178199] [2020-04-17 22:57:53,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:53,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:53,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:53,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:53,484 INFO L87 Difference]: Start difference. First operand 118 states and 287 transitions. Second operand 13 states. [2020-04-17 22:57:53,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:53,676 INFO L93 Difference]: Finished difference Result 165 states and 380 transitions. [2020-04-17 22:57:53,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 22:57:53,676 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:53,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:53,678 INFO L225 Difference]: With dead ends: 165 [2020-04-17 22:57:53,678 INFO L226 Difference]: Without dead ends: 163 [2020-04-17 22:57:53,678 INFO L678 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 [2020-04-17 22:57:53,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-04-17 22:57:53,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 118. [2020-04-17 22:57:53,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-04-17 22:57:53,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 290 transitions. [2020-04-17 22:57:53,681 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 290 transitions. Word has length 12 [2020-04-17 22:57:53,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:53,682 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 290 transitions. [2020-04-17 22:57:53,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:53,682 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 290 transitions. [2020-04-17 22:57:53,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:53,682 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:53,683 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:53,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:53,886 INFO L427 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:53,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:53,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1606881141, now seen corresponding path program 43 times [2020-04-17 22:57:53,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:53,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290751702] [2020-04-17 22:57:53,887 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:53,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:53,938 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:53,939 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290751702] [2020-04-17 22:57:53,939 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188040030] [2020-04-17 22:57:53,939 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:53,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:53,981 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:53,981 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:54,062 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:54,062 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:54,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:54,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891449543] [2020-04-17 22:57:54,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:54,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:54,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:54,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:54,063 INFO L87 Difference]: Start difference. First operand 118 states and 290 transitions. Second operand 13 states. [2020-04-17 22:57:54,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:54,246 INFO L93 Difference]: Finished difference Result 167 states and 384 transitions. [2020-04-17 22:57:54,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 22:57:54,246 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:54,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:54,248 INFO L225 Difference]: With dead ends: 167 [2020-04-17 22:57:54,248 INFO L226 Difference]: Without dead ends: 165 [2020-04-17 22:57:54,248 INFO L678 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 [2020-04-17 22:57:54,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-04-17 22:57:54,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 118. [2020-04-17 22:57:54,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-04-17 22:57:54,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-04-17 22:57:54,252 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-04-17 22:57:54,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:54,252 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-04-17 22:57:54,252 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:54,252 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-04-17 22:57:54,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:54,252 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:54,253 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:54,453 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:54,453 INFO L427 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:54,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:54,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1607543270, now seen corresponding path program 44 times [2020-04-17 22:57:54,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:54,455 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781471527] [2020-04-17 22:57:54,455 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:54,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:54,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:54,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781471527] [2020-04-17 22:57:54,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003949702] [2020-04-17 22:57:54,506 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:54,546 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:57:54,547 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:54,547 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:54,548 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:54,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:54,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:54,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:54,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377543563] [2020-04-17 22:57:54,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:54,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:54,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:54,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:54,625 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-04-17 22:57:54,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:54,861 INFO L93 Difference]: Finished difference Result 168 states and 392 transitions. [2020-04-17 22:57:54,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 22:57:54,862 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:54,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:54,863 INFO L225 Difference]: With dead ends: 168 [2020-04-17 22:57:54,863 INFO L226 Difference]: Without dead ends: 166 [2020-04-17 22:57:54,864 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2020-04-17 22:57:54,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-04-17 22:57:54,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 120. [2020-04-17 22:57:54,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-04-17 22:57:54,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-04-17 22:57:54,867 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-04-17 22:57:54,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:54,867 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-04-17 22:57:54,867 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:54,867 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-04-17 22:57:54,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:54,867 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:54,867 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:55,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:55,068 INFO L427 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:55,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:55,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1607564629, now seen corresponding path program 45 times [2020-04-17 22:57:55,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:55,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239419226] [2020-04-17 22:57:55,070 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:55,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:55,127 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:55,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239419226] [2020-04-17 22:57:55,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485090963] [2020-04-17 22:57:55,127 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:55,178 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 22:57:55,178 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:55,179 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:55,180 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:55,246 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:55,254 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:55,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:55,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:55,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065855478] [2020-04-17 22:57:55,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:55,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:55,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:55,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:55,255 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-04-17 22:57:55,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:55,441 INFO L93 Difference]: Finished difference Result 160 states and 384 transitions. [2020-04-17 22:57:55,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:57:55,442 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:55,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:55,443 INFO L225 Difference]: With dead ends: 160 [2020-04-17 22:57:55,443 INFO L226 Difference]: Without dead ends: 155 [2020-04-17 22:57:55,444 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-04-17 22:57:55,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-04-17 22:57:55,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 121. [2020-04-17 22:57:55,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-04-17 22:57:55,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-04-17 22:57:55,448 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-04-17 22:57:55,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:55,448 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-04-17 22:57:55,448 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:55,448 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-04-17 22:57:55,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:55,451 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:55,451 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:55,654 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:55,655 INFO L427 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:55,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:55,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1607565590, now seen corresponding path program 46 times [2020-04-17 22:57:55,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:55,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937134170] [2020-04-17 22:57:55,655 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:55,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:55,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:55,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937134170] [2020-04-17 22:57:55,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937057996] [2020-04-17 22:57:55,721 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:55,762 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:57:55,763 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:55,763 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:55,764 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:55,818 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:55,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:55,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:55,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:55,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146363553] [2020-04-17 22:57:55,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:55,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:55,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:55,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:55,830 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-04-17 22:57:56,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:56,139 INFO L93 Difference]: Finished difference Result 189 states and 444 transitions. [2020-04-17 22:57:56,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 22:57:56,140 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:56,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:56,141 INFO L225 Difference]: With dead ends: 189 [2020-04-17 22:57:56,141 INFO L226 Difference]: Without dead ends: 181 [2020-04-17 22:57:56,142 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-04-17 22:57:56,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-04-17 22:57:56,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 118. [2020-04-17 22:57:56,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-04-17 22:57:56,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-04-17 22:57:56,145 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-04-17 22:57:56,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:56,146 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-04-17 22:57:56,146 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:56,146 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-04-17 22:57:56,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:56,146 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:56,147 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:56,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:56,350 INFO L427 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:56,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:56,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1607573061, now seen corresponding path program 47 times [2020-04-17 22:57:56,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:56,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447063867] [2020-04-17 22:57:56,352 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:56,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:56,403 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:56,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447063867] [2020-04-17 22:57:56,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580556852] [2020-04-17 22:57:56,404 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:56,444 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:57:56,444 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:56,445 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:56,446 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:56,518 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:56,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:56,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:56,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193833653] [2020-04-17 22:57:56,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:56,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:56,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:56,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:56,519 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-04-17 22:57:56,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:56,733 INFO L93 Difference]: Finished difference Result 169 states and 393 transitions. [2020-04-17 22:57:56,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 22:57:56,734 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:56,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:56,735 INFO L225 Difference]: With dead ends: 169 [2020-04-17 22:57:56,736 INFO L226 Difference]: Without dead ends: 167 [2020-04-17 22:57:56,736 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-04-17 22:57:56,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-04-17 22:57:56,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 120. [2020-04-17 22:57:56,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-04-17 22:57:56,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-04-17 22:57:56,740 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-04-17 22:57:56,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:56,740 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-04-17 22:57:56,740 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:56,740 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-04-17 22:57:56,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:56,741 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:56,741 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:56,944 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:56,944 INFO L427 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:56,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:56,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1607594420, now seen corresponding path program 48 times [2020-04-17 22:57:56,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:56,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544684201] [2020-04-17 22:57:56,945 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:56,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:57,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:57,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544684201] [2020-04-17 22:57:57,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57084897] [2020-04-17 22:57:57,006 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:57,072 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 22:57:57,072 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:57,073 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:57,074 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:57,165 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:57,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:57,173 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:57,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:57,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788958461] [2020-04-17 22:57:57,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:57,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:57,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:57,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:57,174 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-04-17 22:57:57,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:57,470 INFO L93 Difference]: Finished difference Result 192 states and 454 transitions. [2020-04-17 22:57:57,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 22:57:57,470 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:57,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:57,472 INFO L225 Difference]: With dead ends: 192 [2020-04-17 22:57:57,472 INFO L226 Difference]: Without dead ends: 184 [2020-04-17 22:57:57,472 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-04-17 22:57:57,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-04-17 22:57:57,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 119. [2020-04-17 22:57:57,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-04-17 22:57:57,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 287 transitions. [2020-04-17 22:57:57,476 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 287 transitions. Word has length 12 [2020-04-17 22:57:57,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:57,476 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 287 transitions. [2020-04-17 22:57:57,476 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:57,476 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 287 transitions. [2020-04-17 22:57:57,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:57,476 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:57,477 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:57,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:57,680 INFO L427 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:57,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:57,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1607595381, now seen corresponding path program 49 times [2020-04-17 22:57:57,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:57,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821178804] [2020-04-17 22:57:57,681 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:57,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:57,731 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:57,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821178804] [2020-04-17 22:57:57,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346186696] [2020-04-17 22:57:57,732 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:57,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:57,778 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:57,778 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:57,834 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:57,842 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:57,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:57,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:57,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759803694] [2020-04-17 22:57:57,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:57,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:57,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:57,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:57,844 INFO L87 Difference]: Start difference. First operand 119 states and 287 transitions. Second operand 13 states. [2020-04-17 22:57:58,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:58,149 INFO L93 Difference]: Finished difference Result 180 states and 420 transitions. [2020-04-17 22:57:58,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 22:57:58,150 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:58,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:58,151 INFO L225 Difference]: With dead ends: 180 [2020-04-17 22:57:58,151 INFO L226 Difference]: Without dead ends: 175 [2020-04-17 22:57:58,151 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-04-17 22:57:58,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-04-17 22:57:58,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 114. [2020-04-17 22:57:58,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-04-17 22:57:58,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 268 transitions. [2020-04-17 22:57:58,155 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 268 transitions. Word has length 12 [2020-04-17 22:57:58,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:58,155 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 268 transitions. [2020-04-17 22:57:58,155 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:58,155 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 268 transitions. [2020-04-17 22:57:58,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:58,156 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:58,156 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:58,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:58,359 INFO L427 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:58,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:58,359 INFO L82 PathProgramCache]: Analyzing trace with hash -655922238, now seen corresponding path program 5 times [2020-04-17 22:57:58,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:58,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965611231] [2020-04-17 22:57:58,360 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:58,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:58,424 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:58,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965611231] [2020-04-17 22:57:58,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907811827] [2020-04-17 22:57:58,425 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:58,464 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 22:57:58,464 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:58,465 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:57:58,465 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:58,557 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:58,577 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:58,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:58,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 22:57:58,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531218319] [2020-04-17 22:57:58,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:57:58,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:58,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:57:58,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:57:58,579 INFO L87 Difference]: Start difference. First operand 114 states and 268 transitions. Second operand 16 states. [2020-04-17 22:57:58,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:58,751 INFO L93 Difference]: Finished difference Result 164 states and 382 transitions. [2020-04-17 22:57:58,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 22:57:58,751 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2020-04-17 22:57:58,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:58,753 INFO L225 Difference]: With dead ends: 164 [2020-04-17 22:57:58,753 INFO L226 Difference]: Without dead ends: 159 [2020-04-17 22:57:58,753 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2020-04-17 22:57:58,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-04-17 22:57:58,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-04-17 22:57:58,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-04-17 22:57:58,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 299 transitions. [2020-04-17 22:57:58,756 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 299 transitions. Word has length 12 [2020-04-17 22:57:58,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:58,757 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 299 transitions. [2020-04-17 22:57:58,757 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:57:58,757 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 299 transitions. [2020-04-17 22:57:58,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:58,757 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:58,757 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:58,958 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:58,958 INFO L427 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:58,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:58,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1940751883, now seen corresponding path program 15 times [2020-04-17 22:57:58,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:58,959 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521436922] [2020-04-17 22:57:58,960 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:58,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:59,076 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:59,076 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521436922] [2020-04-17 22:57:59,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065292540] [2020-04-17 22:57:59,077 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:59,121 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 22:57:59,121 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:59,122 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:57:59,123 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:59,228 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:59,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:59,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:57:59,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078081983] [2020-04-17 22:57:59,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:57:59,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:59,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:57:59,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:57:59,229 INFO L87 Difference]: Start difference. First operand 122 states and 299 transitions. Second operand 15 states. [2020-04-17 22:57:59,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:59,273 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-04-17 22:57:59,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 22:57:59,274 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-04-17 22:57:59,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:59,275 INFO L225 Difference]: With dead ends: 156 [2020-04-17 22:57:59,275 INFO L226 Difference]: Without dead ends: 153 [2020-04-17 22:57:59,275 INFO L678 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 [2020-04-17 22:57:59,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-04-17 22:57:59,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 129. [2020-04-17 22:57:59,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-04-17 22:57:59,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-04-17 22:57:59,279 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-04-17 22:57:59,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:59,279 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-04-17 22:57:59,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:57:59,279 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-04-17 22:57:59,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:59,280 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:59,280 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:59,481 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:59,482 INFO L427 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:59,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:59,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1078904123, now seen corresponding path program 16 times [2020-04-17 22:57:59,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:59,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047475461] [2020-04-17 22:57:59,483 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:59,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:59,586 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:59,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047475461] [2020-04-17 22:57:59,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938959858] [2020-04-17 22:57:59,587 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:59,627 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:57:59,627 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:59,628 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:57:59,629 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:59,731 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:59,732 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:59,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:57:59,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562292748] [2020-04-17 22:57:59,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:57:59,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:59,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:57:59,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:57:59,733 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-04-17 22:57:59,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:59,805 INFO L93 Difference]: Finished difference Result 170 states and 394 transitions. [2020-04-17 22:57:59,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 22:57:59,806 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-04-17 22:57:59,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:59,807 INFO L225 Difference]: With dead ends: 170 [2020-04-17 22:57:59,807 INFO L226 Difference]: Without dead ends: 167 [2020-04-17 22:57:59,807 INFO L678 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 [2020-04-17 22:57:59,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-04-17 22:57:59,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 129. [2020-04-17 22:57:59,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-04-17 22:57:59,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-04-17 22:57:59,810 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-04-17 22:57:59,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:59,811 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-04-17 22:57:59,811 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:57:59,811 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-04-17 22:57:59,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:59,811 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:59,812 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:00,014 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:00,014 INFO L427 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:00,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:00,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1743839243, now seen corresponding path program 17 times [2020-04-17 22:58:00,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:00,015 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064928956] [2020-04-17 22:58:00,015 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:00,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:00,110 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:00,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064928956] [2020-04-17 22:58:00,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053698326] [2020-04-17 22:58:00,111 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:00,150 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 22:58:00,150 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:00,151 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:00,152 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:00,256 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:00,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:00,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:00,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038013041] [2020-04-17 22:58:00,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:00,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:00,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:00,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:00,258 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-04-17 22:58:00,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:00,339 INFO L93 Difference]: Finished difference Result 169 states and 394 transitions. [2020-04-17 22:58:00,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 22:58:00,339 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-04-17 22:58:00,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:00,340 INFO L225 Difference]: With dead ends: 169 [2020-04-17 22:58:00,340 INFO L226 Difference]: Without dead ends: 166 [2020-04-17 22:58:00,341 INFO L678 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 [2020-04-17 22:58:00,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-04-17 22:58:00,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 130. [2020-04-17 22:58:00,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-04-17 22:58:00,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 320 transitions. [2020-04-17 22:58:00,344 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 320 transitions. Word has length 12 [2020-04-17 22:58:00,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:00,344 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 320 transitions. [2020-04-17 22:58:00,344 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:00,344 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 320 transitions. [2020-04-17 22:58:00,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:58:00,345 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:00,345 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:00,549 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:00,549 INFO L427 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:00,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:00,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1765288763, now seen corresponding path program 18 times [2020-04-17 22:58:00,550 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:00,550 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76170820] [2020-04-17 22:58:00,551 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:00,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:00,655 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:00,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76170820] [2020-04-17 22:58:00,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066394454] [2020-04-17 22:58:00,656 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:00,730 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 22:58:00,730 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:00,732 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:00,733 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:00,884 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:00,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:00,885 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:00,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921115534] [2020-04-17 22:58:00,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:00,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:00,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:00,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:00,887 INFO L87 Difference]: Start difference. First operand 130 states and 320 transitions. Second operand 15 states. [2020-04-17 22:58:01,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:01,034 INFO L93 Difference]: Finished difference Result 168 states and 394 transitions. [2020-04-17 22:58:01,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 22:58:01,034 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-04-17 22:58:01,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:01,036 INFO L225 Difference]: With dead ends: 168 [2020-04-17 22:58:01,036 INFO L226 Difference]: Without dead ends: 165 [2020-04-17 22:58:01,037 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-04-17 22:58:01,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-04-17 22:58:01,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 132. [2020-04-17 22:58:01,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-04-17 22:58:01,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 327 transitions. [2020-04-17 22:58:01,042 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 327 transitions. Word has length 12 [2020-04-17 22:58:01,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:01,042 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 327 transitions. [2020-04-17 22:58:01,042 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:01,042 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 327 transitions. [2020-04-17 22:58:01,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:58:01,043 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:01,043 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:01,247 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:01,248 INFO L427 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:01,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:01,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1765980683, now seen corresponding path program 19 times [2020-04-17 22:58:01,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:01,250 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760917329] [2020-04-17 22:58:01,250 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:01,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:01,363 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:01,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760917329] [2020-04-17 22:58:01,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540346585] [2020-04-17 22:58:01,364 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:01,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:01,431 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:01,432 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:01,543 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:01,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:01,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:01,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156688658] [2020-04-17 22:58:01,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:01,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:01,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:01,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:01,544 INFO L87 Difference]: Start difference. First operand 132 states and 327 transitions. Second operand 15 states. [2020-04-17 22:58:01,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:01,669 INFO L93 Difference]: Finished difference Result 167 states and 394 transitions. [2020-04-17 22:58:01,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:58:01,669 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-04-17 22:58:01,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:01,670 INFO L225 Difference]: With dead ends: 167 [2020-04-17 22:58:01,671 INFO L226 Difference]: Without dead ends: 164 [2020-04-17 22:58:01,671 INFO L678 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 [2020-04-17 22:58:01,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-04-17 22:58:01,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 134. [2020-04-17 22:58:01,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-04-17 22:58:01,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 334 transitions. [2020-04-17 22:58:01,674 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 334 transitions. Word has length 12 [2020-04-17 22:58:01,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:01,675 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 334 transitions. [2020-04-17 22:58:01,675 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:01,675 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 334 transitions. [2020-04-17 22:58:01,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:58:01,675 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:01,676 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:01,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:01,879 INFO L427 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:01,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:01,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1766003003, now seen corresponding path program 20 times [2020-04-17 22:58:01,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:01,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240443401] [2020-04-17 22:58:01,880 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:01,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:01,944 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:01,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240443401] [2020-04-17 22:58:01,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896285322] [2020-04-17 22:58:01,945 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:01,984 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:58:01,984 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:01,985 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:01,985 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:02,065 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:58:02,075 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:02,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:02,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:02,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203438033] [2020-04-17 22:58:02,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:02,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:02,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:02,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:02,077 INFO L87 Difference]: Start difference. First operand 134 states and 334 transitions. Second operand 15 states. [2020-04-17 22:58:02,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:02,260 INFO L93 Difference]: Finished difference Result 176 states and 418 transitions. [2020-04-17 22:58:02,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 22:58:02,261 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-04-17 22:58:02,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:02,262 INFO L225 Difference]: With dead ends: 176 [2020-04-17 22:58:02,263 INFO L226 Difference]: Without dead ends: 170 [2020-04-17 22:58:02,263 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2020-04-17 22:58:02,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-04-17 22:58:02,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 132. [2020-04-17 22:58:02,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-04-17 22:58:02,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 332 transitions. [2020-04-17 22:58:02,265 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 332 transitions. Word has length 12 [2020-04-17 22:58:02,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:02,266 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 332 transitions. [2020-04-17 22:58:02,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:02,266 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 332 transitions. [2020-04-17 22:58:02,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:02,266 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:02,266 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:02,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:02,469 INFO L427 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:02,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:02,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1530333459, now seen corresponding path program 50 times [2020-04-17 22:58:02,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:02,470 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788182972] [2020-04-17 22:58:02,470 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:02,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:02,553 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:02,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788182972] [2020-04-17 22:58:02,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238017657] [2020-04-17 22:58:02,553 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:02,601 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:58:02,602 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:02,602 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:02,603 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:02,726 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:02,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:02,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:02,726 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076185594] [2020-04-17 22:58:02,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:02,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:02,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:02,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:02,727 INFO L87 Difference]: Start difference. First operand 132 states and 332 transitions. Second operand 15 states. [2020-04-17 22:58:02,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:02,779 INFO L93 Difference]: Finished difference Result 163 states and 394 transitions. [2020-04-17 22:58:02,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 22:58:02,780 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:02,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:02,781 INFO L225 Difference]: With dead ends: 163 [2020-04-17 22:58:02,781 INFO L226 Difference]: Without dead ends: 161 [2020-04-17 22:58:02,782 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:02,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-04-17 22:58:02,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 138. [2020-04-17 22:58:02,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-04-17 22:58:02,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 350 transitions. [2020-04-17 22:58:02,785 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 350 transitions. Word has length 13 [2020-04-17 22:58:02,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:02,785 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 350 transitions. [2020-04-17 22:58:02,785 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:02,785 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 350 transitions. [2020-04-17 22:58:02,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:02,786 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:02,786 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:02,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:02,987 INFO L427 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:02,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:02,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1530332498, now seen corresponding path program 51 times [2020-04-17 22:58:02,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:02,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553768855] [2020-04-17 22:58:02,988 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:02,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:03,074 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:03,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553768855] [2020-04-17 22:58:03,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821709069] [2020-04-17 22:58:03,075 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:03,113 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 22:58:03,113 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:03,114 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:03,114 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:03,221 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:03,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:03,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:03,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835682270] [2020-04-17 22:58:03,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:03,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:03,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:03,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:03,222 INFO L87 Difference]: Start difference. First operand 138 states and 350 transitions. Second operand 15 states. [2020-04-17 22:58:03,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:03,367 INFO L93 Difference]: Finished difference Result 172 states and 412 transitions. [2020-04-17 22:58:03,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 22:58:03,368 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:03,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:03,370 INFO L225 Difference]: With dead ends: 172 [2020-04-17 22:58:03,370 INFO L226 Difference]: Without dead ends: 170 [2020-04-17 22:58:03,370 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2020-04-17 22:58:03,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-04-17 22:58:03,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 136. [2020-04-17 22:58:03,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-04-17 22:58:03,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-04-17 22:58:03,373 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-04-17 22:58:03,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:03,373 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-04-17 22:58:03,373 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:03,373 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-04-17 22:58:03,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:03,374 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:03,374 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:03,577 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:03,578 INFO L427 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:03,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:03,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1530303668, now seen corresponding path program 52 times [2020-04-17 22:58:03,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:03,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915821449] [2020-04-17 22:58:03,579 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:03,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:03,660 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:03,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915821449] [2020-04-17 22:58:03,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159525232] [2020-04-17 22:58:03,660 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 22:58:03,700 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:58:03,701 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:03,701 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:03,702 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:08,009 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:08,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:08,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:08,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818721170] [2020-04-17 22:58:08,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:08,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:08,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:08,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:08,010 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-04-17 22:58:08,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:08,209 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-04-17 22:58:08,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 22:58:08,209 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:08,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:08,211 INFO L225 Difference]: With dead ends: 179 [2020-04-17 22:58:08,211 INFO L226 Difference]: Without dead ends: 177 [2020-04-17 22:58:08,211 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2020-04-17 22:58:08,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-04-17 22:58:08,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 134. [2020-04-17 22:58:08,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-04-17 22:58:08,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 338 transitions. [2020-04-17 22:58:08,215 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 338 transitions. Word has length 13 [2020-04-17 22:58:08,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:08,215 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 338 transitions. [2020-04-17 22:58:08,215 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:08,215 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 338 transitions. [2020-04-17 22:58:08,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:08,216 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:08,216 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:08,418 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:08,419 INFO L427 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:08,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:08,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1529409938, now seen corresponding path program 53 times [2020-04-17 22:58:08,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:08,420 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614825184] [2020-04-17 22:58:08,421 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:08,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:08,498 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:08,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614825184] [2020-04-17 22:58:08,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263697015] [2020-04-17 22:58:08,499 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:08,540 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:58:08,540 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:08,541 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:08,541 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:08,639 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:08,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:08,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:08,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266030735] [2020-04-17 22:58:08,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:08,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:08,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:08,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:08,640 INFO L87 Difference]: Start difference. First operand 134 states and 338 transitions. Second operand 15 states. [2020-04-17 22:58:08,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:08,833 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-04-17 22:58:08,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 22:58:08,833 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:08,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:08,834 INFO L225 Difference]: With dead ends: 179 [2020-04-17 22:58:08,835 INFO L226 Difference]: Without dead ends: 177 [2020-04-17 22:58:08,835 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2020-04-17 22:58:08,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-04-17 22:58:08,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 136. [2020-04-17 22:58:08,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-04-17 22:58:08,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-04-17 22:58:08,839 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-04-17 22:58:08,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:08,839 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-04-17 22:58:08,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:08,839 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-04-17 22:58:08,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:08,840 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:08,840 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:09,043 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:09,043 INFO L427 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:09,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:09,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1529408977, now seen corresponding path program 54 times [2020-04-17 22:58:09,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:09,044 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753916877] [2020-04-17 22:58:09,045 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:09,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:09,122 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:09,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753916877] [2020-04-17 22:58:09,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67193386] [2020-04-17 22:58:09,123 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:09,167 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 22:58:09,167 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:09,168 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:09,168 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:09,268 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:09,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:09,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:09,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176140180] [2020-04-17 22:58:09,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:09,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:09,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:09,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:09,269 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-04-17 22:58:09,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:09,466 INFO L93 Difference]: Finished difference Result 184 states and 436 transitions. [2020-04-17 22:58:09,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:58:09,466 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:09,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:09,468 INFO L225 Difference]: With dead ends: 184 [2020-04-17 22:58:09,468 INFO L226 Difference]: Without dead ends: 182 [2020-04-17 22:58:09,468 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-04-17 22:58:09,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-04-17 22:58:09,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 136. [2020-04-17 22:58:09,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-04-17 22:58:09,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 342 transitions. [2020-04-17 22:58:09,471 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 342 transitions. Word has length 13 [2020-04-17 22:58:09,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:09,472 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 342 transitions. [2020-04-17 22:58:09,472 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:09,472 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 342 transitions. [2020-04-17 22:58:09,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:09,472 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:09,472 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:09,673 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:09,673 INFO L427 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:09,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:09,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1529380147, now seen corresponding path program 55 times [2020-04-17 22:58:09,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:09,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685142972] [2020-04-17 22:58:09,674 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:09,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:09,761 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:09,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685142972] [2020-04-17 22:58:09,762 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51674187] [2020-04-17 22:58:09,762 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:09,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:09,812 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:09,812 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:10,363 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:10,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:10,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:10,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635333721] [2020-04-17 22:58:10,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:10,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:10,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:10,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:10,364 INFO L87 Difference]: Start difference. First operand 136 states and 342 transitions. Second operand 15 states. [2020-04-17 22:58:10,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:10,559 INFO L93 Difference]: Finished difference Result 179 states and 427 transitions. [2020-04-17 22:58:10,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:58:10,560 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:10,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:10,562 INFO L225 Difference]: With dead ends: 179 [2020-04-17 22:58:10,562 INFO L226 Difference]: Without dead ends: 177 [2020-04-17 22:58:10,562 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-04-17 22:58:10,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-04-17 22:58:10,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 135. [2020-04-17 22:58:10,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-04-17 22:58:10,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 339 transitions. [2020-04-17 22:58:10,566 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 339 transitions. Word has length 13 [2020-04-17 22:58:10,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:10,566 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 339 transitions. [2020-04-17 22:58:10,566 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:10,566 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 339 transitions. [2020-04-17 22:58:10,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:10,567 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:10,567 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:10,770 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:10,770 INFO L427 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:10,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:10,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1501704308, now seen corresponding path program 56 times [2020-04-17 22:58:10,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:10,772 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420327966] [2020-04-17 22:58:10,772 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:10,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:10,861 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:10,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420327966] [2020-04-17 22:58:10,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582665115] [2020-04-17 22:58:10,862 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:10,899 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:58:10,900 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:10,900 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:10,901 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:11,010 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:11,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:11,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:11,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730865944] [2020-04-17 22:58:11,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:11,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:11,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:11,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:11,011 INFO L87 Difference]: Start difference. First operand 135 states and 339 transitions. Second operand 15 states. [2020-04-17 22:58:11,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:11,158 INFO L93 Difference]: Finished difference Result 176 states and 421 transitions. [2020-04-17 22:58:11,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 22:58:11,159 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:11,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:11,160 INFO L225 Difference]: With dead ends: 176 [2020-04-17 22:58:11,161 INFO L226 Difference]: Without dead ends: 174 [2020-04-17 22:58:11,161 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-04-17 22:58:11,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-04-17 22:58:11,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 139. [2020-04-17 22:58:11,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-04-17 22:58:11,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 350 transitions. [2020-04-17 22:58:11,164 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 350 transitions. Word has length 13 [2020-04-17 22:58:11,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:11,164 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 350 transitions. [2020-04-17 22:58:11,164 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:11,164 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 350 transitions. [2020-04-17 22:58:11,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:11,165 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:11,165 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:11,366 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:11,366 INFO L427 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:11,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:11,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1501703347, now seen corresponding path program 57 times [2020-04-17 22:58:11,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:11,367 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779089938] [2020-04-17 22:58:11,367 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:11,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:11,465 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:11,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779089938] [2020-04-17 22:58:11,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521824125] [2020-04-17 22:58:11,465 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:11,506 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 22:58:11,506 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:11,507 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:11,507 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:12,114 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:12,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:12,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:12,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922511894] [2020-04-17 22:58:12,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:12,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:12,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:12,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:12,116 INFO L87 Difference]: Start difference. First operand 139 states and 350 transitions. Second operand 15 states. [2020-04-17 22:58:12,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:12,336 INFO L93 Difference]: Finished difference Result 185 states and 439 transitions. [2020-04-17 22:58:12,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:58:12,337 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:12,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:12,338 INFO L225 Difference]: With dead ends: 185 [2020-04-17 22:58:12,338 INFO L226 Difference]: Without dead ends: 183 [2020-04-17 22:58:12,339 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-04-17 22:58:12,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-04-17 22:58:12,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 140. [2020-04-17 22:58:12,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-04-17 22:58:12,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 352 transitions. [2020-04-17 22:58:12,342 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 352 transitions. Word has length 13 [2020-04-17 22:58:12,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:12,342 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 352 transitions. [2020-04-17 22:58:12,342 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:12,342 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 352 transitions. [2020-04-17 22:58:12,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:12,343 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:12,343 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:12,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:12,546 INFO L427 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:12,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:12,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1501674517, now seen corresponding path program 58 times [2020-04-17 22:58:12,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:12,547 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049197826] [2020-04-17 22:58:12,547 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:12,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:12,641 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:12,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049197826] [2020-04-17 22:58:12,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210543414] [2020-04-17 22:58:12,642 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 22:58:12,679 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:58:12,680 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:12,680 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:12,681 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:12,787 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:12,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:12,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:12,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753643728] [2020-04-17 22:58:12,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:12,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:12,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:12,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:12,788 INFO L87 Difference]: Start difference. First operand 140 states and 352 transitions. Second operand 15 states. [2020-04-17 22:58:12,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:12,979 INFO L93 Difference]: Finished difference Result 185 states and 439 transitions. [2020-04-17 22:58:12,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:58:12,979 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:12,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:12,981 INFO L225 Difference]: With dead ends: 185 [2020-04-17 22:58:12,981 INFO L226 Difference]: Without dead ends: 183 [2020-04-17 22:58:12,981 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-04-17 22:58:12,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-04-17 22:58:12,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 138. [2020-04-17 22:58:12,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-04-17 22:58:12,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 345 transitions. [2020-04-17 22:58:12,986 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 345 transitions. Word has length 13 [2020-04-17 22:58:12,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:12,986 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 345 transitions. [2020-04-17 22:58:12,986 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:12,986 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 345 transitions. [2020-04-17 22:58:12,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:12,987 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:12,987 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:13,189 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:13,190 INFO L427 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:13,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:13,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1043911547, now seen corresponding path program 59 times [2020-04-17 22:58:13,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:13,192 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31854650] [2020-04-17 22:58:13,192 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:13,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:13,307 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:13,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31854650] [2020-04-17 22:58:13,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632701340] [2020-04-17 22:58:13,307 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:13,345 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 22:58:13,345 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:13,346 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:13,346 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:13,451 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:13,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:13,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:13,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966535705] [2020-04-17 22:58:13,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:13,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:13,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:13,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:13,453 INFO L87 Difference]: Start difference. First operand 138 states and 345 transitions. Second operand 15 states. [2020-04-17 22:58:13,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:13,528 INFO L93 Difference]: Finished difference Result 182 states and 432 transitions. [2020-04-17 22:58:13,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 22:58:13,529 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:13,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:13,530 INFO L225 Difference]: With dead ends: 182 [2020-04-17 22:58:13,530 INFO L226 Difference]: Without dead ends: 180 [2020-04-17 22:58:13,530 INFO L678 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 [2020-04-17 22:58:13,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-04-17 22:58:13,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 144. [2020-04-17 22:58:13,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-04-17 22:58:13,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 363 transitions. [2020-04-17 22:58:13,536 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 363 transitions. Word has length 13 [2020-04-17 22:58:13,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:13,536 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 363 transitions. [2020-04-17 22:58:13,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:13,536 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 363 transitions. [2020-04-17 22:58:13,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:13,537 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:13,537 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:13,742 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:13,742 INFO L427 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:13,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:13,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1043912508, now seen corresponding path program 60 times [2020-04-17 22:58:13,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:13,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609149738] [2020-04-17 22:58:13,743 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:13,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:13,887 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:13,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609149738] [2020-04-17 22:58:13,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917023505] [2020-04-17 22:58:13,887 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:13,930 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 22:58:13,931 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:13,931 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:13,932 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:14,059 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:14,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:14,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:14,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953632556] [2020-04-17 22:58:14,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:14,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:14,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:14,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:14,060 INFO L87 Difference]: Start difference. First operand 144 states and 363 transitions. Second operand 15 states. [2020-04-17 22:58:14,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:14,225 INFO L93 Difference]: Finished difference Result 185 states and 437 transitions. [2020-04-17 22:58:14,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 22:58:14,226 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:14,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:14,227 INFO L225 Difference]: With dead ends: 185 [2020-04-17 22:58:14,227 INFO L226 Difference]: Without dead ends: 183 [2020-04-17 22:58:14,228 INFO L678 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 [2020-04-17 22:58:14,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-04-17 22:58:14,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 142. [2020-04-17 22:58:14,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 22:58:14,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-04-17 22:58:14,231 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-04-17 22:58:14,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:14,232 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-04-17 22:58:14,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:14,232 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-04-17 22:58:14,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:14,232 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:14,232 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:14,433 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:14,433 INFO L427 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:14,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:14,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1043941338, now seen corresponding path program 61 times [2020-04-17 22:58:14,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:14,435 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76650074] [2020-04-17 22:58:14,435 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:14,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:14,520 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:14,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76650074] [2020-04-17 22:58:14,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237994799] [2020-04-17 22:58:14,521 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:14,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:14,560 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:14,561 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:14,688 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:14,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:14,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:14,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978696788] [2020-04-17 22:58:14,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:14,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:14,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:14,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:14,689 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-04-17 22:58:14,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:14,933 INFO L93 Difference]: Finished difference Result 191 states and 449 transitions. [2020-04-17 22:58:14,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 22:58:14,933 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:14,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:14,935 INFO L225 Difference]: With dead ends: 191 [2020-04-17 22:58:14,935 INFO L226 Difference]: Without dead ends: 189 [2020-04-17 22:58:14,935 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2020-04-17 22:58:14,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-04-17 22:58:14,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 140. [2020-04-17 22:58:14,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-04-17 22:58:14,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 351 transitions. [2020-04-17 22:58:14,939 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 351 transitions. Word has length 13 [2020-04-17 22:58:14,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:14,939 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 351 transitions. [2020-04-17 22:58:14,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:14,940 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 351 transitions. [2020-04-17 22:58:14,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:14,940 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:14,940 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:15,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:15,143 INFO L427 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:15,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:15,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1044835068, now seen corresponding path program 62 times [2020-04-17 22:58:15,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:15,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463056716] [2020-04-17 22:58:15,145 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:15,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:15,222 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:15,222 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463056716] [2020-04-17 22:58:15,223 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427554725] [2020-04-17 22:58:15,223 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:15,264 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:58:15,264 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:15,265 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:15,266 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:15,371 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:15,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:15,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:15,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923428936] [2020-04-17 22:58:15,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:15,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:15,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:15,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:15,373 INFO L87 Difference]: Start difference. First operand 140 states and 351 transitions. Second operand 15 states. [2020-04-17 22:58:15,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:15,598 INFO L93 Difference]: Finished difference Result 187 states and 441 transitions. [2020-04-17 22:58:15,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 22:58:15,599 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:15,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:15,601 INFO L225 Difference]: With dead ends: 187 [2020-04-17 22:58:15,601 INFO L226 Difference]: Without dead ends: 185 [2020-04-17 22:58:15,601 INFO L678 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 [2020-04-17 22:58:15,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-04-17 22:58:15,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 142. [2020-04-17 22:58:15,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 22:58:15,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-04-17 22:58:15,605 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-04-17 22:58:15,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:15,605 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-04-17 22:58:15,605 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:15,605 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-04-17 22:58:15,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:15,605 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:15,606 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:15,806 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:15,806 INFO L427 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:15,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:15,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1044836029, now seen corresponding path program 63 times [2020-04-17 22:58:15,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:15,808 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235986666] [2020-04-17 22:58:15,808 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:15,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:15,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:15,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235986666] [2020-04-17 22:58:15,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418895808] [2020-04-17 22:58:15,894 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:15,933 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 22:58:15,934 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:15,934 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:15,935 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:16,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:16,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:16,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:16,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123150882] [2020-04-17 22:58:16,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:16,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:16,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:16,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:16,045 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-04-17 22:58:16,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:16,281 INFO L93 Difference]: Finished difference Result 198 states and 463 transitions. [2020-04-17 22:58:16,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 22:58:16,282 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:16,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:16,284 INFO L225 Difference]: With dead ends: 198 [2020-04-17 22:58:16,284 INFO L226 Difference]: Without dead ends: 196 [2020-04-17 22:58:16,284 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2020-04-17 22:58:16,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-04-17 22:58:16,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 142. [2020-04-17 22:58:16,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 22:58:16,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 356 transitions. [2020-04-17 22:58:16,288 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 356 transitions. Word has length 13 [2020-04-17 22:58:16,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:16,288 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 356 transitions. [2020-04-17 22:58:16,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:16,288 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 356 transitions. [2020-04-17 22:58:16,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:16,288 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:16,289 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:16,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:16,489 INFO L427 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:16,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:16,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1044864859, now seen corresponding path program 64 times [2020-04-17 22:58:16,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:16,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667886720] [2020-04-17 22:58:16,491 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:16,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:16,569 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:16,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667886720] [2020-04-17 22:58:16,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795280671] [2020-04-17 22:58:16,570 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 22:58:16,605 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:58:16,605 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:16,606 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:16,606 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:17,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:17,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:17,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:17,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349046945] [2020-04-17 22:58:17,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:17,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:17,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:17,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:17,165 INFO L87 Difference]: Start difference. First operand 142 states and 356 transitions. Second operand 15 states. [2020-04-17 22:58:17,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:17,422 INFO L93 Difference]: Finished difference Result 189 states and 446 transitions. [2020-04-17 22:58:17,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 22:58:17,422 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:17,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:17,424 INFO L225 Difference]: With dead ends: 189 [2020-04-17 22:58:17,424 INFO L226 Difference]: Without dead ends: 187 [2020-04-17 22:58:17,424 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-04-17 22:58:17,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-04-17 22:58:17,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 139. [2020-04-17 22:58:17,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-04-17 22:58:17,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 347 transitions. [2020-04-17 22:58:17,428 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 347 transitions. Word has length 13 [2020-04-17 22:58:17,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:17,428 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 347 transitions. [2020-04-17 22:58:17,428 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:17,428 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 347 transitions. [2020-04-17 22:58:17,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:17,429 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:17,429 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:17,631 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:17,632 INFO L427 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:17,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:17,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1681141037, now seen corresponding path program 65 times [2020-04-17 22:58:17,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:17,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081554337] [2020-04-17 22:58:17,633 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:17,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:17,738 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:17,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081554337] [2020-04-17 22:58:17,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17927041] [2020-04-17 22:58:17,739 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:17,785 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 22:58:17,785 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:17,786 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:17,787 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:17,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:17,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:17,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:17,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395984170] [2020-04-17 22:58:17,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:17,892 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:17,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:17,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:17,892 INFO L87 Difference]: Start difference. First operand 139 states and 347 transitions. Second operand 15 states. [2020-04-17 22:58:17,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:17,985 INFO L93 Difference]: Finished difference Result 178 states and 423 transitions. [2020-04-17 22:58:17,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 22:58:17,986 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:17,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:17,988 INFO L225 Difference]: With dead ends: 178 [2020-04-17 22:58:17,988 INFO L226 Difference]: Without dead ends: 176 [2020-04-17 22:58:17,988 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:58:17,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-04-17 22:58:17,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 143. [2020-04-17 22:58:17,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-04-17 22:58:17,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 359 transitions. [2020-04-17 22:58:17,992 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 359 transitions. Word has length 13 [2020-04-17 22:58:17,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:17,992 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 359 transitions. [2020-04-17 22:58:17,992 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:17,992 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 359 transitions. [2020-04-17 22:58:17,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:17,992 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:17,993 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:18,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:18,194 INFO L427 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:18,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:18,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1681141998, now seen corresponding path program 66 times [2020-04-17 22:58:18,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:18,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696837502] [2020-04-17 22:58:18,196 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:18,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:18,282 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:18,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696837502] [2020-04-17 22:58:18,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745586759] [2020-04-17 22:58:18,283 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:18,324 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 22:58:18,325 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:18,325 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:18,326 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:18,439 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:18,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:18,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:18,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073613969] [2020-04-17 22:58:18,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:18,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:18,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:18,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:18,440 INFO L87 Difference]: Start difference. First operand 143 states and 359 transitions. Second operand 15 states. [2020-04-17 22:58:18,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:18,635 INFO L93 Difference]: Finished difference Result 193 states and 452 transitions. [2020-04-17 22:58:18,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 22:58:18,635 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:18,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:18,637 INFO L225 Difference]: With dead ends: 193 [2020-04-17 22:58:18,637 INFO L226 Difference]: Without dead ends: 191 [2020-04-17 22:58:18,637 INFO L678 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 [2020-04-17 22:58:18,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-04-17 22:58:18,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 141. [2020-04-17 22:58:18,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-04-17 22:58:18,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 353 transitions. [2020-04-17 22:58:18,640 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 353 transitions. Word has length 13 [2020-04-17 22:58:18,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:18,640 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 353 transitions. [2020-04-17 22:58:18,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:18,640 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 353 transitions. [2020-04-17 22:58:18,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:18,641 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:18,641 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:18,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:18,842 INFO L427 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:18,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:18,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1681170828, now seen corresponding path program 67 times [2020-04-17 22:58:18,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:18,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670692176] [2020-04-17 22:58:18,843 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:18,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:18,923 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:18,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670692176] [2020-04-17 22:58:18,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622086522] [2020-04-17 22:58:18,924 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:18,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:18,965 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:18,965 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:23,111 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:23,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:23,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:23,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260119629] [2020-04-17 22:58:23,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:23,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:23,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:23,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:23,112 INFO L87 Difference]: Start difference. First operand 141 states and 353 transitions. Second operand 15 states. [2020-04-17 22:58:23,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:23,375 INFO L93 Difference]: Finished difference Result 195 states and 456 transitions. [2020-04-17 22:58:23,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 22:58:23,375 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:23,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:23,376 INFO L225 Difference]: With dead ends: 195 [2020-04-17 22:58:23,376 INFO L226 Difference]: Without dead ends: 193 [2020-04-17 22:58:23,377 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2020-04-17 22:58:23,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-04-17 22:58:23,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 140. [2020-04-17 22:58:23,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-04-17 22:58:23,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 349 transitions. [2020-04-17 22:58:23,381 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 349 transitions. Word has length 13 [2020-04-17 22:58:23,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:23,381 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 349 transitions. [2020-04-17 22:58:23,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:23,381 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 349 transitions. [2020-04-17 22:58:23,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:23,382 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:23,382 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:23,584 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:23,585 INFO L427 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:23,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:23,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1701696827, now seen corresponding path program 68 times [2020-04-17 22:58:23,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:23,586 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045490417] [2020-04-17 22:58:23,586 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:23,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:23,690 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:23,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045490417] [2020-04-17 22:58:23,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324133399] [2020-04-17 22:58:23,691 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:23,733 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:58:23,734 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:23,734 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:23,735 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:23,855 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:23,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:23,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:23,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120256929] [2020-04-17 22:58:23,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:23,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:23,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:23,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:23,856 INFO L87 Difference]: Start difference. First operand 140 states and 349 transitions. Second operand 15 states. [2020-04-17 22:58:23,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:23,982 INFO L93 Difference]: Finished difference Result 174 states and 414 transitions. [2020-04-17 22:58:23,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 22:58:23,982 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:23,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:23,984 INFO L225 Difference]: With dead ends: 174 [2020-04-17 22:58:23,984 INFO L226 Difference]: Without dead ends: 172 [2020-04-17 22:58:23,984 INFO L678 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 [2020-04-17 22:58:23,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-04-17 22:58:23,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 142. [2020-04-17 22:58:23,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 22:58:23,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 355 transitions. [2020-04-17 22:58:23,987 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 355 transitions. Word has length 13 [2020-04-17 22:58:23,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:23,988 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 355 transitions. [2020-04-17 22:58:23,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:23,988 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 355 transitions. [2020-04-17 22:58:23,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:23,988 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:23,988 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:24,191 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:24,192 INFO L427 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:24,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:24,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1701697788, now seen corresponding path program 69 times [2020-04-17 22:58:24,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:24,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356366977] [2020-04-17 22:58:24,193 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:24,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:24,266 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:24,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356366977] [2020-04-17 22:58:24,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660332321] [2020-04-17 22:58:24,267 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:24,308 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 22:58:24,308 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:24,309 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:24,309 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:24,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:24,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:24,431 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:24,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561392999] [2020-04-17 22:58:24,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:24,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:24,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:24,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:24,432 INFO L87 Difference]: Start difference. First operand 142 states and 355 transitions. Second operand 15 states. [2020-04-17 22:58:24,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:24,651 INFO L93 Difference]: Finished difference Result 189 states and 443 transitions. [2020-04-17 22:58:24,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 22:58:24,652 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:24,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:24,653 INFO L225 Difference]: With dead ends: 189 [2020-04-17 22:58:24,654 INFO L226 Difference]: Without dead ends: 187 [2020-04-17 22:58:24,654 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-04-17 22:58:24,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-04-17 22:58:24,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 141. [2020-04-17 22:58:24,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-04-17 22:58:24,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 351 transitions. [2020-04-17 22:58:24,657 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 351 transitions. Word has length 13 [2020-04-17 22:58:24,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:24,657 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 351 transitions. [2020-04-17 22:58:24,657 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:24,657 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 351 transitions. [2020-04-17 22:58:24,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:24,658 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:24,658 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:24,858 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:24,859 INFO L427 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:24,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:24,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1702359917, now seen corresponding path program 70 times [2020-04-17 22:58:24,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:24,860 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177348490] [2020-04-17 22:58:24,860 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:24,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:24,950 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:24,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177348490] [2020-04-17 22:58:24,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875706384] [2020-04-17 22:58:24,950 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 22:58:24,993 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:58:24,994 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:24,995 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:24,995 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:25,099 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:25,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:25,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:25,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326754040] [2020-04-17 22:58:25,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:25,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:25,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:25,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:25,101 INFO L87 Difference]: Start difference. First operand 141 states and 351 transitions. Second operand 15 states. [2020-04-17 22:58:25,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:25,242 INFO L93 Difference]: Finished difference Result 175 states and 413 transitions. [2020-04-17 22:58:25,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:58:25,243 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:25,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:25,244 INFO L225 Difference]: With dead ends: 175 [2020-04-17 22:58:25,244 INFO L226 Difference]: Without dead ends: 173 [2020-04-17 22:58:25,245 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-04-17 22:58:25,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-04-17 22:58:25,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 145. [2020-04-17 22:58:25,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-04-17 22:58:25,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-04-17 22:58:25,248 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-04-17 22:58:25,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:25,248 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-04-17 22:58:25,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:25,248 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-04-17 22:58:25,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:25,249 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:25,249 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:25,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:25,451 INFO L427 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:25,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:25,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1702382237, now seen corresponding path program 71 times [2020-04-17 22:58:25,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:25,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194747896] [2020-04-17 22:58:25,452 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:25,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:25,520 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:25,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194747896] [2020-04-17 22:58:25,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801140162] [2020-04-17 22:58:25,521 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:25,554 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 22:58:25,555 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:25,556 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:25,556 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:25,641 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:58:25,654 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:25,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:25,655 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:25,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457161014] [2020-04-17 22:58:25,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:25,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:25,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:25,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:25,655 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-04-17 22:58:25,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:25,987 INFO L93 Difference]: Finished difference Result 195 states and 464 transitions. [2020-04-17 22:58:25,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 22:58:25,988 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:25,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:25,989 INFO L225 Difference]: With dead ends: 195 [2020-04-17 22:58:25,989 INFO L226 Difference]: Without dead ends: 190 [2020-04-17 22:58:25,990 INFO L678 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 [2020-04-17 22:58:25,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-04-17 22:58:25,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 143. [2020-04-17 22:58:25,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-04-17 22:58:25,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-04-17 22:58:25,993 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-04-17 22:58:25,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:25,993 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-04-17 22:58:25,993 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:25,993 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-04-17 22:58:25,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:25,994 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:25,994 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:26,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:26,195 INFO L427 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:26,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:26,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1702389708, now seen corresponding path program 72 times [2020-04-17 22:58:26,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:26,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853418229] [2020-04-17 22:58:26,196 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:26,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:26,268 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:26,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853418229] [2020-04-17 22:58:26,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235160001] [2020-04-17 22:58:26,269 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:26,310 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 22:58:26,311 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:26,311 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:26,312 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:26,432 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:26,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:26,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:26,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958995862] [2020-04-17 22:58:26,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:26,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:26,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:26,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:26,434 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-04-17 22:58:26,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:26,686 INFO L93 Difference]: Finished difference Result 187 states and 442 transitions. [2020-04-17 22:58:26,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 22:58:26,686 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:26,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:26,687 INFO L225 Difference]: With dead ends: 187 [2020-04-17 22:58:26,688 INFO L226 Difference]: Without dead ends: 185 [2020-04-17 22:58:26,688 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-04-17 22:58:26,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-04-17 22:58:26,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 145. [2020-04-17 22:58:26,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-04-17 22:58:26,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-04-17 22:58:26,691 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-04-17 22:58:26,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:26,692 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-04-17 22:58:26,692 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:26,692 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-04-17 22:58:26,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:26,692 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:26,693 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:26,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:26,893 INFO L427 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:26,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:26,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1702411067, now seen corresponding path program 73 times [2020-04-17 22:58:26,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:26,894 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699720071] [2020-04-17 22:58:26,895 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:26,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:26,980 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:26,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699720071] [2020-04-17 22:58:26,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189851382] [2020-04-17 22:58:26,981 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:27,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:27,024 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:27,025 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:27,724 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:58:27,747 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:27,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:27,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:27,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91441619] [2020-04-17 22:58:27,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:27,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:27,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:27,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:27,748 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-04-17 22:58:28,439 WARN L192 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2020-04-17 22:58:29,104 WARN L192 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2020-04-17 22:58:29,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:29,139 INFO L93 Difference]: Finished difference Result 212 states and 503 transitions. [2020-04-17 22:58:29,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 22:58:29,140 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:29,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:29,141 INFO L225 Difference]: With dead ends: 212 [2020-04-17 22:58:29,142 INFO L226 Difference]: Without dead ends: 207 [2020-04-17 22:58:29,142 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2020-04-17 22:58:29,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-04-17 22:58:29,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-04-17 22:58:29,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-04-17 22:58:29,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-04-17 22:58:29,146 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-04-17 22:58:29,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:29,146 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-04-17 22:58:29,146 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:29,146 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-04-17 22:58:29,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:29,146 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:29,146 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:29,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:29,347 INFO L427 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:29,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:29,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1702412028, now seen corresponding path program 74 times [2020-04-17 22:58:29,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:29,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235074675] [2020-04-17 22:58:29,349 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:29,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:29,416 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:29,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235074675] [2020-04-17 22:58:29,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265490668] [2020-04-17 22:58:29,417 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:29,460 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:58:29,461 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:29,461 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:29,462 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:29,562 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:58:29,987 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:29,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:29,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 22:58:29,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424964307] [2020-04-17 22:58:29,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:58:29,989 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:29,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:58:29,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=172, Unknown=1, NotChecked=0, Total=240 [2020-04-17 22:58:29,989 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 16 states. [2020-04-17 22:58:30,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:30,336 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-04-17 22:58:30,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 22:58:30,337 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-04-17 22:58:30,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:30,339 INFO L225 Difference]: With dead ends: 202 [2020-04-17 22:58:30,339 INFO L226 Difference]: Without dead ends: 197 [2020-04-17 22:58:30,340 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=208, Invalid=441, Unknown=1, NotChecked=0, Total=650 [2020-04-17 22:58:30,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-04-17 22:58:30,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 141. [2020-04-17 22:58:30,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-04-17 22:58:30,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 343 transitions. [2020-04-17 22:58:30,343 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 343 transitions. Word has length 13 [2020-04-17 22:58:30,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:30,343 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 343 transitions. [2020-04-17 22:58:30,343 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:58:30,343 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 343 transitions. [2020-04-17 22:58:30,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:30,344 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:30,344 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:30,544 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:30,544 INFO L427 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:30,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:30,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1702620348, now seen corresponding path program 75 times [2020-04-17 22:58:30,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:30,545 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558721058] [2020-04-17 22:58:30,546 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:30,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:30,614 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:30,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558721058] [2020-04-17 22:58:30,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789460783] [2020-04-17 22:58:30,615 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:30,655 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 22:58:30,656 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:30,656 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:30,657 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:34,839 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:34,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:34,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:34,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778088155] [2020-04-17 22:58:34,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:34,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:34,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:34,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:34,840 INFO L87 Difference]: Start difference. First operand 141 states and 343 transitions. Second operand 15 states. [2020-04-17 22:58:35,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:35,152 INFO L93 Difference]: Finished difference Result 198 states and 460 transitions. [2020-04-17 22:58:35,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 22:58:35,152 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:35,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:35,153 INFO L225 Difference]: With dead ends: 198 [2020-04-17 22:58:35,153 INFO L226 Difference]: Without dead ends: 196 [2020-04-17 22:58:35,154 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2020-04-17 22:58:35,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-04-17 22:58:35,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 143. [2020-04-17 22:58:35,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-04-17 22:58:35,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-04-17 22:58:35,157 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-04-17 22:58:35,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:35,157 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-04-17 22:58:35,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:35,157 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-04-17 22:58:35,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:35,158 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:35,158 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:35,359 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:35,359 INFO L427 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:35,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:35,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1703283438, now seen corresponding path program 76 times [2020-04-17 22:58:35,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:35,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294315768] [2020-04-17 22:58:35,360 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:35,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:35,433 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:35,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294315768] [2020-04-17 22:58:35,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841962330] [2020-04-17 22:58:35,434 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 22:58:35,478 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:58:35,478 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:35,479 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:35,480 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:35,675 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:35,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:35,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:35,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586576324] [2020-04-17 22:58:35,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:35,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:35,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:35,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:35,677 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-04-17 22:58:36,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:36,069 INFO L93 Difference]: Finished difference Result 209 states and 491 transitions. [2020-04-17 22:58:36,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 22:58:36,070 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:36,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:36,072 INFO L225 Difference]: With dead ends: 209 [2020-04-17 22:58:36,072 INFO L226 Difference]: Without dead ends: 207 [2020-04-17 22:58:36,072 INFO L678 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 [2020-04-17 22:58:36,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-04-17 22:58:36,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-04-17 22:58:36,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-04-17 22:58:36,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-04-17 22:58:36,076 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-04-17 22:58:36,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:36,076 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-04-17 22:58:36,076 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:36,076 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-04-17 22:58:36,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:36,076 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:36,076 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:36,277 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:36,277 INFO L427 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:36,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:36,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1703304797, now seen corresponding path program 77 times [2020-04-17 22:58:36,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:36,278 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858249340] [2020-04-17 22:58:36,279 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:36,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:36,359 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:36,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858249340] [2020-04-17 22:58:36,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774625652] [2020-04-17 22:58:36,359 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:36,417 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 22:58:36,417 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:36,418 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:36,419 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:36,565 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:58:36,579 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:36,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:36,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:36,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144564672] [2020-04-17 22:58:36,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:36,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:36,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:36,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:36,580 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-04-17 22:58:37,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:37,229 INFO L93 Difference]: Finished difference Result 217 states and 518 transitions. [2020-04-17 22:58:37,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 22:58:37,229 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:37,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:37,231 INFO L225 Difference]: With dead ends: 217 [2020-04-17 22:58:37,231 INFO L226 Difference]: Without dead ends: 212 [2020-04-17 22:58:37,231 INFO L678 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 [2020-04-17 22:58:37,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-04-17 22:58:37,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 146. [2020-04-17 22:58:37,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-04-17 22:58:37,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 362 transitions. [2020-04-17 22:58:37,235 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 362 transitions. Word has length 13 [2020-04-17 22:58:37,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:37,236 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 362 transitions. [2020-04-17 22:58:37,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:37,236 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 362 transitions. [2020-04-17 22:58:37,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:37,236 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:37,236 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:37,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:37,440 INFO L427 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:37,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:37,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1703305758, now seen corresponding path program 78 times [2020-04-17 22:58:37,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:37,441 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393607421] [2020-04-17 22:58:37,441 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:37,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:37,508 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:37,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393607421] [2020-04-17 22:58:37,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408905602] [2020-04-17 22:58:37,509 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:37,550 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 22:58:37,550 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:37,551 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:37,551 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:37,671 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:58:37,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:37,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:37,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:37,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060004235] [2020-04-17 22:58:37,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:37,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:37,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:37,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:37,687 INFO L87 Difference]: Start difference. First operand 146 states and 362 transitions. Second operand 15 states. [2020-04-17 22:58:38,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:38,295 INFO L93 Difference]: Finished difference Result 236 states and 562 transitions. [2020-04-17 22:58:38,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 22:58:38,295 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:38,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:38,297 INFO L225 Difference]: With dead ends: 236 [2020-04-17 22:58:38,297 INFO L226 Difference]: Without dead ends: 228 [2020-04-17 22:58:38,297 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=295, Invalid=635, Unknown=0, NotChecked=0, Total=930 [2020-04-17 22:58:38,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-04-17 22:58:38,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 141. [2020-04-17 22:58:38,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-04-17 22:58:38,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 346 transitions. [2020-04-17 22:58:38,301 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 346 transitions. Word has length 13 [2020-04-17 22:58:38,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:38,302 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 346 transitions. [2020-04-17 22:58:38,302 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:38,302 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 346 transitions. [2020-04-17 22:58:38,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:38,302 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:38,303 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:38,505 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:38,506 INFO L427 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:38,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:38,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1703334588, now seen corresponding path program 79 times [2020-04-17 22:58:38,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:38,507 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310268276] [2020-04-17 22:58:38,507 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:38,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:38,589 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:38,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310268276] [2020-04-17 22:58:38,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95551651] [2020-04-17 22:58:38,590 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:38,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:38,638 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:38,638 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:38,740 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:58:38,755 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:38,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:38,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:38,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020462998] [2020-04-17 22:58:38,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:38,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:38,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:38,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:38,756 INFO L87 Difference]: Start difference. First operand 141 states and 346 transitions. Second operand 15 states. [2020-04-17 22:58:39,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:39,258 INFO L93 Difference]: Finished difference Result 219 states and 522 transitions. [2020-04-17 22:58:39,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 22:58:39,259 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:39,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:39,260 INFO L225 Difference]: With dead ends: 219 [2020-04-17 22:58:39,260 INFO L226 Difference]: Without dead ends: 214 [2020-04-17 22:58:39,260 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=262, Invalid=550, Unknown=0, NotChecked=0, Total=812 [2020-04-17 22:58:39,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-04-17 22:58:39,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 140. [2020-04-17 22:58:39,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-04-17 22:58:39,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 341 transitions. [2020-04-17 22:58:39,264 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 341 transitions. Word has length 13 [2020-04-17 22:58:39,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:39,264 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 341 transitions. [2020-04-17 22:58:39,264 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:39,264 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 341 transitions. [2020-04-17 22:58:39,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:39,264 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:39,264 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:39,465 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:39,465 INFO L427 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:39,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:39,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1709770188, now seen corresponding path program 80 times [2020-04-17 22:58:39,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:39,466 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586481685] [2020-04-17 22:58:39,467 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:39,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:39,533 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:39,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586481685] [2020-04-17 22:58:39,534 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782422015] [2020-04-17 22:58:39,534 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:39,575 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:58:39,575 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:39,575 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:39,576 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:39,681 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:39,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:39,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:39,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218935316] [2020-04-17 22:58:39,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:39,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:39,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:39,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:39,682 INFO L87 Difference]: Start difference. First operand 140 states and 341 transitions. Second operand 15 states. [2020-04-17 22:58:39,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:39,920 INFO L93 Difference]: Finished difference Result 197 states and 457 transitions. [2020-04-17 22:58:39,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 22:58:39,921 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:39,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:39,922 INFO L225 Difference]: With dead ends: 197 [2020-04-17 22:58:39,922 INFO L226 Difference]: Without dead ends: 195 [2020-04-17 22:58:39,923 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-04-17 22:58:39,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-04-17 22:58:39,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 143. [2020-04-17 22:58:39,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-04-17 22:58:39,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 352 transitions. [2020-04-17 22:58:39,927 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 352 transitions. Word has length 13 [2020-04-17 22:58:39,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:39,927 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 352 transitions. [2020-04-17 22:58:39,927 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:39,927 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 352 transitions. [2020-04-17 22:58:39,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:39,928 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:39,928 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:40,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:40,132 INFO L427 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:40,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:40,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1709771149, now seen corresponding path program 81 times [2020-04-17 22:58:40,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:40,133 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471902803] [2020-04-17 22:58:40,133 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:40,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:40,203 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:40,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471902803] [2020-04-17 22:58:40,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806352056] [2020-04-17 22:58:40,204 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:40,246 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 22:58:40,246 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:40,246 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:40,247 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:40,363 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:40,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:40,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:40,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643176736] [2020-04-17 22:58:40,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:40,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:40,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:40,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:40,364 INFO L87 Difference]: Start difference. First operand 143 states and 352 transitions. Second operand 15 states. [2020-04-17 22:58:40,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:40,617 INFO L93 Difference]: Finished difference Result 202 states and 467 transitions. [2020-04-17 22:58:40,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 22:58:40,618 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:40,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:40,619 INFO L225 Difference]: With dead ends: 202 [2020-04-17 22:58:40,619 INFO L226 Difference]: Without dead ends: 200 [2020-04-17 22:58:40,619 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2020-04-17 22:58:40,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-04-17 22:58:40,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 143. [2020-04-17 22:58:40,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-04-17 22:58:40,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 351 transitions. [2020-04-17 22:58:40,623 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 351 transitions. Word has length 13 [2020-04-17 22:58:40,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:40,623 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 351 transitions. [2020-04-17 22:58:40,623 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:40,623 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 351 transitions. [2020-04-17 22:58:40,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:40,623 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:40,623 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:40,824 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:40,824 INFO L427 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:40,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:40,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1709799979, now seen corresponding path program 82 times [2020-04-17 22:58:40,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:40,825 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102294322] [2020-04-17 22:58:40,826 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:40,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:40,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:40,895 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102294322] [2020-04-17 22:58:40,895 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758767723] [2020-04-17 22:58:40,895 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 22:58:40,938 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:58:40,938 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:40,941 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:40,942 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:41,537 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:41,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:41,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:41,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376757217] [2020-04-17 22:58:41,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:41,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:41,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:41,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:41,539 INFO L87 Difference]: Start difference. First operand 143 states and 351 transitions. Second operand 15 states. [2020-04-17 22:58:41,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:41,801 INFO L93 Difference]: Finished difference Result 197 states and 458 transitions. [2020-04-17 22:58:41,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 22:58:41,802 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:41,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:41,803 INFO L225 Difference]: With dead ends: 197 [2020-04-17 22:58:41,803 INFO L226 Difference]: Without dead ends: 195 [2020-04-17 22:58:41,803 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2020-04-17 22:58:41,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-04-17 22:58:41,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 142. [2020-04-17 22:58:41,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 22:58:41,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 348 transitions. [2020-04-17 22:58:41,807 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 348 transitions. Word has length 13 [2020-04-17 22:58:41,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:41,807 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 348 transitions. [2020-04-17 22:58:41,807 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:41,807 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 348 transitions. [2020-04-17 22:58:41,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:41,808 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:41,808 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:42,008 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:42,008 INFO L427 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:42,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:42,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1730325978, now seen corresponding path program 83 times [2020-04-17 22:58:42,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:42,009 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017122932] [2020-04-17 22:58:42,010 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:42,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:42,092 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:42,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017122932] [2020-04-17 22:58:42,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517367107] [2020-04-17 22:58:42,092 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:42,151 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:58:42,151 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:42,152 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:42,153 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:42,302 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:42,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:42,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:42,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529960138] [2020-04-17 22:58:42,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:42,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:42,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:42,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:42,303 INFO L87 Difference]: Start difference. First operand 142 states and 348 transitions. Second operand 15 states. [2020-04-17 22:58:42,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:42,695 INFO L93 Difference]: Finished difference Result 214 states and 496 transitions. [2020-04-17 22:58:42,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-04-17 22:58:42,695 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:42,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:42,696 INFO L225 Difference]: With dead ends: 214 [2020-04-17 22:58:42,696 INFO L226 Difference]: Without dead ends: 212 [2020-04-17 22:58:42,697 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2020-04-17 22:58:42,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-04-17 22:58:42,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 144. [2020-04-17 22:58:42,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-04-17 22:58:42,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 356 transitions. [2020-04-17 22:58:42,700 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 356 transitions. Word has length 13 [2020-04-17 22:58:42,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:42,701 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 356 transitions. [2020-04-17 22:58:42,701 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:42,701 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 356 transitions. [2020-04-17 22:58:42,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:42,701 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:42,701 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:42,904 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:42,905 INFO L427 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:42,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:42,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1730326939, now seen corresponding path program 84 times [2020-04-17 22:58:42,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:42,906 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444923646] [2020-04-17 22:58:42,906 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:42,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:42,974 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:42,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444923646] [2020-04-17 22:58:42,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753375943] [2020-04-17 22:58:42,975 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:43,010 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 22:58:43,011 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:43,011 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:43,012 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:43,119 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:43,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:43,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:43,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168493384] [2020-04-17 22:58:43,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:43,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:43,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:43,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:43,120 INFO L87 Difference]: Start difference. First operand 144 states and 356 transitions. Second operand 15 states. [2020-04-17 22:58:43,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:43,477 INFO L93 Difference]: Finished difference Result 217 states and 502 transitions. [2020-04-17 22:58:43,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 22:58:43,478 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:43,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:43,479 INFO L225 Difference]: With dead ends: 217 [2020-04-17 22:58:43,479 INFO L226 Difference]: Without dead ends: 215 [2020-04-17 22:58:43,479 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=207, Invalid=495, Unknown=0, NotChecked=0, Total=702 [2020-04-17 22:58:43,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-04-17 22:58:43,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 145. [2020-04-17 22:58:43,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-04-17 22:58:43,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-04-17 22:58:43,483 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-04-17 22:58:43,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:43,483 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-04-17 22:58:43,483 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:43,484 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-04-17 22:58:43,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:43,484 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:43,484 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:43,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:43,686 INFO L427 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:43,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:43,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1730989068, now seen corresponding path program 85 times [2020-04-17 22:58:43,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:43,687 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253134144] [2020-04-17 22:58:43,687 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:43,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:43,754 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:43,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253134144] [2020-04-17 22:58:43,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34699032] [2020-04-17 22:58:43,755 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 22:58:43,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:43,795 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:43,795 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:43,924 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:43,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:43,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:43,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316123968] [2020-04-17 22:58:43,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:43,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:43,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:43,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:43,927 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-04-17 22:58:44,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:44,341 INFO L93 Difference]: Finished difference Result 211 states and 500 transitions. [2020-04-17 22:58:44,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 22:58:44,342 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:44,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:44,343 INFO L225 Difference]: With dead ends: 211 [2020-04-17 22:58:44,343 INFO L226 Difference]: Without dead ends: 209 [2020-04-17 22:58:44,343 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2020-04-17 22:58:44,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-04-17 22:58:44,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 147. [2020-04-17 22:58:44,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-04-17 22:58:44,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-04-17 22:58:44,347 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-04-17 22:58:44,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:44,348 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-04-17 22:58:44,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:44,348 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-04-17 22:58:44,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:44,348 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:44,348 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:44,551 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:44,551 INFO L427 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:44,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:44,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1731010427, now seen corresponding path program 86 times [2020-04-17 22:58:44,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:44,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764507708] [2020-04-17 22:58:44,552 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:44,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:44,631 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:44,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764507708] [2020-04-17 22:58:44,632 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436597712] [2020-04-17 22:58:44,632 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 22:58:44,685 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:58:44,686 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:44,687 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:44,688 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:44,812 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:58:44,821 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:44,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:44,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:44,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050159925] [2020-04-17 22:58:44,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:44,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:44,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:44,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:44,822 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-04-17 22:58:45,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:45,297 INFO L93 Difference]: Finished difference Result 211 states and 507 transitions. [2020-04-17 22:58:45,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 22:58:45,297 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:45,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:45,298 INFO L225 Difference]: With dead ends: 211 [2020-04-17 22:58:45,298 INFO L226 Difference]: Without dead ends: 206 [2020-04-17 22:58:45,299 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-04-17 22:58:45,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-04-17 22:58:45,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 147. [2020-04-17 22:58:45,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-04-17 22:58:45,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-04-17 22:58:45,301 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-04-17 22:58:45,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:45,302 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-04-17 22:58:45,302 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:45,302 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-04-17 22:58:45,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:45,302 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:45,302 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:45,502 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:45,503 INFO L427 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:45,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:45,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1731011388, now seen corresponding path program 87 times [2020-04-17 22:58:45,504 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:45,504 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224826627] [2020-04-17 22:58:45,504 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:45,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:45,566 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:45,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224826627] [2020-04-17 22:58:45,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314207814] [2020-04-17 22:58:45,567 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 22:58:45,605 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 22:58:45,606 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:45,606 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:45,607 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:45,715 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:58:45,731 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:45,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:45,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:45,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946744669] [2020-04-17 22:58:45,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:45,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:45,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:45,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:45,732 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-04-17 22:58:46,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:46,231 INFO L93 Difference]: Finished difference Result 227 states and 546 transitions. [2020-04-17 22:58:46,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 22:58:46,232 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:46,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:46,233 INFO L225 Difference]: With dead ends: 227 [2020-04-17 22:58:46,233 INFO L226 Difference]: Without dead ends: 222 [2020-04-17 22:58:46,233 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-04-17 22:58:46,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-04-17 22:58:46,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 145. [2020-04-17 22:58:46,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-04-17 22:58:46,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-04-17 22:58:46,237 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-04-17 22:58:46,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:46,238 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-04-17 22:58:46,238 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:46,238 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-04-17 22:58:46,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:46,238 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:46,238 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:46,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:46,439 INFO L427 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:46,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:46,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1731018859, now seen corresponding path program 88 times [2020-04-17 22:58:46,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:46,441 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091921296] [2020-04-17 22:58:46,441 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:46,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:46,508 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:46,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091921296] [2020-04-17 22:58:46,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663498744] [2020-04-17 22:58:46,508 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 22:58:46,549 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:58:46,549 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:46,549 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:46,550 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:46,643 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:46,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:46,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:46,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745222398] [2020-04-17 22:58:46,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:46,644 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:46,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:46,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:46,644 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-04-17 22:58:47,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:47,066 INFO L93 Difference]: Finished difference Result 221 states and 523 transitions. [2020-04-17 22:58:47,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 22:58:47,066 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:47,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:47,067 INFO L225 Difference]: With dead ends: 221 [2020-04-17 22:58:47,068 INFO L226 Difference]: Without dead ends: 219 [2020-04-17 22:58:47,068 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=652, Unknown=0, NotChecked=0, Total=930 [2020-04-17 22:58:47,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-04-17 22:58:47,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 147. [2020-04-17 22:58:47,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-04-17 22:58:47,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-04-17 22:58:47,072 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-04-17 22:58:47,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:47,072 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-04-17 22:58:47,072 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:47,073 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-04-17 22:58:47,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:47,073 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:47,073 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:47,273 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:47,274 INFO L427 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:47,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:47,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1731040218, now seen corresponding path program 89 times [2020-04-17 22:58:47,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:47,275 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516890568] [2020-04-17 22:58:47,275 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:47,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:47,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:47,338 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516890568] [2020-04-17 22:58:47,338 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238041148] [2020-04-17 22:58:47,339 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 22:58:47,382 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 22:58:47,383 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:47,383 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:47,384 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:47,474 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:58:47,481 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:47,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:47,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:47,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502843775] [2020-04-17 22:58:47,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:47,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:47,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:47,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:47,482 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-04-17 22:58:47,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:47,997 INFO L93 Difference]: Finished difference Result 240 states and 577 transitions. [2020-04-17 22:58:47,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 22:58:47,997 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:47,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:47,998 INFO L225 Difference]: With dead ends: 240 [2020-04-17 22:58:47,998 INFO L226 Difference]: Without dead ends: 232 [2020-04-17 22:58:47,999 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-04-17 22:58:48,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-04-17 22:58:48,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 148. [2020-04-17 22:58:48,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-04-17 22:58:48,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 372 transitions. [2020-04-17 22:58:48,002 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 372 transitions. Word has length 13 [2020-04-17 22:58:48,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:48,003 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 372 transitions. [2020-04-17 22:58:48,003 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:48,003 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 372 transitions. [2020-04-17 22:58:48,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:48,003 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:48,003 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:48,203 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:48,204 INFO L427 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:48,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:48,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1731041179, now seen corresponding path program 90 times [2020-04-17 22:58:48,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:48,205 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860857083] [2020-04-17 22:58:48,205 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:48,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:48,270 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:48,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860857083] [2020-04-17 22:58:48,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401027873] [2020-04-17 22:58:48,270 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 22:58:48,310 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 22:58:48,311 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:48,311 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:48,312 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:48,384 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:58:48,396 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:48,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:48,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:48,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981806381] [2020-04-17 22:58:48,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:48,397 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:48,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:48,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:48,397 INFO L87 Difference]: Start difference. First operand 148 states and 372 transitions. Second operand 15 states. [2020-04-17 22:58:48,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:48,958 INFO L93 Difference]: Finished difference Result 238 states and 576 transitions. [2020-04-17 22:58:48,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 22:58:48,958 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:48,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:48,959 INFO L225 Difference]: With dead ends: 238 [2020-04-17 22:58:48,959 INFO L226 Difference]: Without dead ends: 230 [2020-04-17 22:58:48,960 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-04-17 22:58:48,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-04-17 22:58:48,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 142. [2020-04-17 22:58:48,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 22:58:48,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-04-17 22:58:48,962 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-04-17 22:58:48,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:48,963 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-04-17 22:58:48,963 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:48,963 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-04-17 22:58:48,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:48,963 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:48,963 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:49,164 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:49,164 INFO L427 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:49,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:49,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1731249499, now seen corresponding path program 91 times [2020-04-17 22:58:49,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:49,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999225724] [2020-04-17 22:58:49,165 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:49,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:49,236 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:49,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999225724] [2020-04-17 22:58:49,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709992321] [2020-04-17 22:58:49,236 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 22:58:49,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:49,275 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:49,276 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:49,854 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:49,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:49,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:49,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205013712] [2020-04-17 22:58:49,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:49,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:49,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:49,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:49,855 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-04-17 22:58:50,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:50,085 INFO L93 Difference]: Finished difference Result 195 states and 459 transitions. [2020-04-17 22:58:50,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 22:58:50,085 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:50,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:50,086 INFO L225 Difference]: With dead ends: 195 [2020-04-17 22:58:50,086 INFO L226 Difference]: Without dead ends: 193 [2020-04-17 22:58:50,087 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2020-04-17 22:58:50,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-04-17 22:58:50,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 142. [2020-04-17 22:58:50,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 22:58:50,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-04-17 22:58:50,089 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-04-17 22:58:50,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:50,090 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-04-17 22:58:50,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:50,090 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-04-17 22:58:50,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:50,090 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:50,090 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:50,290 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:50,291 INFO L427 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:50,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:50,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1731912589, now seen corresponding path program 92 times [2020-04-17 22:58:50,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:50,292 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221330992] [2020-04-17 22:58:50,292 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:50,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:50,356 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:50,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221330992] [2020-04-17 22:58:50,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515086323] [2020-04-17 22:58:50,357 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 22:58:50,391 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:58:50,391 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:50,392 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:50,392 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:50,519 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:50,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:50,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:50,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381556734] [2020-04-17 22:58:50,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:50,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:50,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:50,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:50,521 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-04-17 22:58:50,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:50,940 INFO L93 Difference]: Finished difference Result 206 states and 489 transitions. [2020-04-17 22:58:50,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 22:58:50,940 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:50,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:50,941 INFO L225 Difference]: With dead ends: 206 [2020-04-17 22:58:50,941 INFO L226 Difference]: Without dead ends: 204 [2020-04-17 22:58:50,942 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=230, Invalid=526, Unknown=0, NotChecked=0, Total=756 [2020-04-17 22:58:50,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-04-17 22:58:50,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 143. [2020-04-17 22:58:50,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-04-17 22:58:50,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 356 transitions. [2020-04-17 22:58:50,945 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 356 transitions. Word has length 13 [2020-04-17 22:58:50,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:50,945 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 356 transitions. [2020-04-17 22:58:50,946 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:50,946 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 356 transitions. [2020-04-17 22:58:50,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:50,946 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:50,946 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:51,147 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:51,147 INFO L427 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:51,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:51,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1731934909, now seen corresponding path program 93 times [2020-04-17 22:58:51,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:51,148 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568634438] [2020-04-17 22:58:51,148 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:51,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:51,209 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:51,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568634438] [2020-04-17 22:58:51,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821255121] [2020-04-17 22:58:51,210 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 22:58:51,252 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 22:58:51,252 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:51,253 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 22:58:51,253 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:51,355 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:58:51,371 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:51,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:51,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:51,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585559910] [2020-04-17 22:58:51,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:51,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:51,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:51,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:51,373 INFO L87 Difference]: Start difference. First operand 143 states and 356 transitions. Second operand 15 states. [2020-04-17 22:58:51,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:51,900 INFO L93 Difference]: Finished difference Result 224 states and 535 transitions. [2020-04-17 22:58:51,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 22:58:51,900 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:51,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:51,901 INFO L225 Difference]: With dead ends: 224 [2020-04-17 22:58:51,901 INFO L226 Difference]: Without dead ends: 219 [2020-04-17 22:58:51,902 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=270, Invalid=660, Unknown=0, NotChecked=0, Total=930 [2020-04-17 22:58:51,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-04-17 22:58:51,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 139. [2020-04-17 22:58:51,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-04-17 22:58:51,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 339 transitions. [2020-04-17 22:58:51,906 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 339 transitions. Word has length 13 [2020-04-17 22:58:51,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:51,906 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 339 transitions. [2020-04-17 22:58:51,906 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:51,906 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 339 transitions. [2020-04-17 22:58:51,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:51,907 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:51,907 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:52,109 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:52,110 INFO L427 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:52,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:52,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1931415228, now seen corresponding path program 94 times [2020-04-17 22:58:52,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:52,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703788901] [2020-04-17 22:58:52,111 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:52,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:52,197 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:52,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703788901] [2020-04-17 22:58:52,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188318462] [2020-04-17 22:58:52,198 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 22:58:52,237 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:58:52,237 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:52,238 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:52,238 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:52,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:52,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:52,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:52,339 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106515053] [2020-04-17 22:58:52,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:52,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:52,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:52,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:52,340 INFO L87 Difference]: Start difference. First operand 139 states and 339 transitions. Second operand 15 states. [2020-04-17 22:58:52,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:52,519 INFO L93 Difference]: Finished difference Result 194 states and 449 transitions. [2020-04-17 22:58:52,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 22:58:52,520 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:52,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:52,520 INFO L225 Difference]: With dead ends: 194 [2020-04-17 22:58:52,521 INFO L226 Difference]: Without dead ends: 192 [2020-04-17 22:58:52,521 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-04-17 22:58:52,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-04-17 22:58:52,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 141. [2020-04-17 22:58:52,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-04-17 22:58:52,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 345 transitions. [2020-04-17 22:58:52,524 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 345 transitions. Word has length 13 [2020-04-17 22:58:52,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:52,524 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 345 transitions. [2020-04-17 22:58:52,524 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:52,524 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 345 transitions. [2020-04-17 22:58:52,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:52,524 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:52,524 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:52,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:52,725 INFO L427 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:52,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:52,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1931416189, now seen corresponding path program 95 times [2020-04-17 22:58:52,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:52,726 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98381138] [2020-04-17 22:58:52,727 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:52,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:52,799 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:52,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98381138] [2020-04-17 22:58:52,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538726759] [2020-04-17 22:58:52,800 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 22:58:52,838 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 22:58:52,838 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:52,839 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:52,840 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:53,592 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:53,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:53,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:53,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279046932] [2020-04-17 22:58:53,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:53,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:53,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:53,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:53,593 INFO L87 Difference]: Start difference. First operand 141 states and 345 transitions. Second operand 15 states. [2020-04-17 22:58:53,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:53,896 INFO L93 Difference]: Finished difference Result 205 states and 471 transitions. [2020-04-17 22:58:53,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 22:58:53,896 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:53,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:53,897 INFO L225 Difference]: With dead ends: 205 [2020-04-17 22:58:53,897 INFO L226 Difference]: Without dead ends: 203 [2020-04-17 22:58:53,898 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-04-17 22:58:53,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-04-17 22:58:53,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 142. [2020-04-17 22:58:53,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 22:58:53,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 347 transitions. [2020-04-17 22:58:53,901 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 347 transitions. Word has length 13 [2020-04-17 22:58:53,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:53,901 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 347 transitions. [2020-04-17 22:58:53,902 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:53,902 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 347 transitions. [2020-04-17 22:58:53,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:53,902 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:53,902 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:54,103 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:54,103 INFO L427 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:54,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:54,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1931445019, now seen corresponding path program 96 times [2020-04-17 22:58:54,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:54,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489644222] [2020-04-17 22:58:54,105 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:54,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:54,196 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:54,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489644222] [2020-04-17 22:58:54,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634288243] [2020-04-17 22:58:54,196 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 22:58:54,260 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 22:58:54,260 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:54,262 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:54,263 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:54,401 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:54,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:54,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:54,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269349346] [2020-04-17 22:58:54,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:54,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:54,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:54,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:54,403 INFO L87 Difference]: Start difference. First operand 142 states and 347 transitions. Second operand 15 states. [2020-04-17 22:58:54,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:54,704 INFO L93 Difference]: Finished difference Result 201 states and 465 transitions. [2020-04-17 22:58:54,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 22:58:54,704 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:54,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:54,705 INFO L225 Difference]: With dead ends: 201 [2020-04-17 22:58:54,706 INFO L226 Difference]: Without dead ends: 199 [2020-04-17 22:58:54,706 INFO L678 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 [2020-04-17 22:58:54,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-04-17 22:58:54,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 137. [2020-04-17 22:58:54,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-04-17 22:58:54,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 334 transitions. [2020-04-17 22:58:54,710 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 334 transitions. Word has length 13 [2020-04-17 22:58:54,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:54,711 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 334 transitions. [2020-04-17 22:58:54,711 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:54,711 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 334 transitions. [2020-04-17 22:58:54,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:54,711 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:54,712 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:54,916 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:54,916 INFO L427 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:54,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:54,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1726322578, now seen corresponding path program 97 times [2020-04-17 22:58:54,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:54,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040656630] [2020-04-17 22:58:54,917 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:54,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:54,976 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:54,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040656630] [2020-04-17 22:58:54,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946459078] [2020-04-17 22:58:54,977 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 22:58:55,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:55,017 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:55,018 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:55,127 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:55,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:55,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:55,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808571215] [2020-04-17 22:58:55,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:55,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:55,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:55,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:55,129 INFO L87 Difference]: Start difference. First operand 137 states and 334 transitions. Second operand 15 states. [2020-04-17 22:58:55,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:55,338 INFO L93 Difference]: Finished difference Result 194 states and 449 transitions. [2020-04-17 22:58:55,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 22:58:55,338 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:55,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:55,339 INFO L225 Difference]: With dead ends: 194 [2020-04-17 22:58:55,339 INFO L226 Difference]: Without dead ends: 192 [2020-04-17 22:58:55,339 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-04-17 22:58:55,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-04-17 22:58:55,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 140. [2020-04-17 22:58:55,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-04-17 22:58:55,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 345 transitions. [2020-04-17 22:58:55,342 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 345 transitions. Word has length 13 [2020-04-17 22:58:55,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:55,343 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 345 transitions. [2020-04-17 22:58:55,343 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:55,343 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 345 transitions. [2020-04-17 22:58:55,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:55,343 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:55,343 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:55,544 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:55,544 INFO L427 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:55,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:55,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1726321617, now seen corresponding path program 98 times [2020-04-17 22:58:55,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:55,545 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984395094] [2020-04-17 22:58:55,545 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:55,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:55,617 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:55,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984395094] [2020-04-17 22:58:55,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785689425] [2020-04-17 22:58:55,618 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 22:58:55,655 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:58:55,655 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:55,656 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:55,656 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:56,598 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:56,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:56,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:56,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633364095] [2020-04-17 22:58:56,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:56,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:56,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:56,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:56,599 INFO L87 Difference]: Start difference. First operand 140 states and 345 transitions. Second operand 15 states. [2020-04-17 22:58:56,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:56,894 INFO L93 Difference]: Finished difference Result 209 states and 478 transitions. [2020-04-17 22:58:56,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 22:58:56,895 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:56,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:56,896 INFO L225 Difference]: With dead ends: 209 [2020-04-17 22:58:56,896 INFO L226 Difference]: Without dead ends: 207 [2020-04-17 22:58:56,896 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2020-04-17 22:58:56,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-04-17 22:58:56,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 140. [2020-04-17 22:58:56,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-04-17 22:58:56,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 344 transitions. [2020-04-17 22:58:56,899 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 344 transitions. Word has length 13 [2020-04-17 22:58:56,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:56,899 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 344 transitions. [2020-04-17 22:58:56,899 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:56,900 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 344 transitions. [2020-04-17 22:58:56,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:56,900 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:56,900 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:57,100 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:57,101 INFO L427 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:57,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:57,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1726292787, now seen corresponding path program 99 times [2020-04-17 22:58:57,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:57,102 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308856579] [2020-04-17 22:58:57,102 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:57,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:57,166 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:57,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308856579] [2020-04-17 22:58:57,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962491869] [2020-04-17 22:58:57,167 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 22:58:57,208 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 22:58:57,209 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:57,209 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:57,210 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:57,325 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:57,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:57,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:57,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994085342] [2020-04-17 22:58:57,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:57,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:57,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:57,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:57,327 INFO L87 Difference]: Start difference. First operand 140 states and 344 transitions. Second operand 15 states. [2020-04-17 22:58:57,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:57,607 INFO L93 Difference]: Finished difference Result 202 states and 464 transitions. [2020-04-17 22:58:57,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 22:58:57,607 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:57,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:57,608 INFO L225 Difference]: With dead ends: 202 [2020-04-17 22:58:57,608 INFO L226 Difference]: Without dead ends: 200 [2020-04-17 22:58:57,609 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2020-04-17 22:58:57,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-04-17 22:58:57,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 139. [2020-04-17 22:58:57,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-04-17 22:58:57,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-04-17 22:58:57,612 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-04-17 22:58:57,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:57,612 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-04-17 22:58:57,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:57,612 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-04-17 22:58:57,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:57,612 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:57,613 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:57,813 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:57,813 INFO L427 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:57,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:57,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1705766788, now seen corresponding path program 100 times [2020-04-17 22:58:57,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:57,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106665434] [2020-04-17 22:58:57,815 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:57,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:57,879 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:57,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106665434] [2020-04-17 22:58:57,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542744895] [2020-04-17 22:58:57,880 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 22:58:57,920 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:58:57,921 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:57,922 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:57,922 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:58,046 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:58,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:58,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:58,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937554302] [2020-04-17 22:58:58,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:58,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:58,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:58,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:58,047 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 15 states. [2020-04-17 22:58:58,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:58,323 INFO L93 Difference]: Finished difference Result 201 states and 465 transitions. [2020-04-17 22:58:58,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 22:58:58,323 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:58,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:58,324 INFO L225 Difference]: With dead ends: 201 [2020-04-17 22:58:58,324 INFO L226 Difference]: Without dead ends: 199 [2020-04-17 22:58:58,325 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=177, Invalid=423, Unknown=0, NotChecked=0, Total=600 [2020-04-17 22:58:58,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-04-17 22:58:58,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 141. [2020-04-17 22:58:58,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-04-17 22:58:58,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 349 transitions. [2020-04-17 22:58:58,327 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 349 transitions. Word has length 13 [2020-04-17 22:58:58,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:58,329 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 349 transitions. [2020-04-17 22:58:58,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:58,330 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 349 transitions. [2020-04-17 22:58:58,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:58,330 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:58,330 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:58,533 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:58,533 INFO L427 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:58,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:58,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1705765827, now seen corresponding path program 101 times [2020-04-17 22:58:58,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:58,534 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858059309] [2020-04-17 22:58:58,534 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:58,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:58,607 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:58,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858059309] [2020-04-17 22:58:58,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103603327] [2020-04-17 22:58:58,607 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 22:58:58,650 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 22:58:58,650 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:58,651 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:58,651 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:58,772 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:58,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:58,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:58,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768567432] [2020-04-17 22:58:58,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:58,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:58,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:58,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:58,774 INFO L87 Difference]: Start difference. First operand 141 states and 349 transitions. Second operand 15 states. [2020-04-17 22:58:59,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:59,165 INFO L93 Difference]: Finished difference Result 215 states and 495 transitions. [2020-04-17 22:58:59,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-04-17 22:58:59,166 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:59,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:59,167 INFO L225 Difference]: With dead ends: 215 [2020-04-17 22:58:59,167 INFO L226 Difference]: Without dead ends: 213 [2020-04-17 22:58:59,167 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-04-17 22:58:59,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-04-17 22:58:59,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 142. [2020-04-17 22:58:59,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 22:58:59,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-04-17 22:58:59,171 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-04-17 22:58:59,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:59,172 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-04-17 22:58:59,172 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:59,172 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-04-17 22:58:59,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:59,172 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:59,173 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:59,374 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:59,375 INFO L427 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:59,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:59,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1705103698, now seen corresponding path program 102 times [2020-04-17 22:58:59,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:59,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399769052] [2020-04-17 22:58:59,377 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:59,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:59,439 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:59,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399769052] [2020-04-17 22:58:59,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702869712] [2020-04-17 22:58:59,440 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 22:58:59,480 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 22:58:59,481 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:59,481 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:59,482 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:59,575 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:59,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:59,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:59,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509598325] [2020-04-17 22:58:59,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:59,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:59,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:59,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:59,577 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-04-17 22:58:59,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:59,905 INFO L93 Difference]: Finished difference Result 196 states and 461 transitions. [2020-04-17 22:58:59,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 22:58:59,906 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:59,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:59,907 INFO L225 Difference]: With dead ends: 196 [2020-04-17 22:58:59,907 INFO L226 Difference]: Without dead ends: 194 [2020-04-17 22:58:59,908 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2020-04-17 22:58:59,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-04-17 22:58:59,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 144. [2020-04-17 22:58:59,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-04-17 22:58:59,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-04-17 22:58:59,911 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-04-17 22:58:59,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:59,912 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-04-17 22:58:59,912 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:59,912 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-04-17 22:58:59,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:59,912 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:59,912 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:00,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:00,115 INFO L427 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:00,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:00,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1705082339, now seen corresponding path program 103 times [2020-04-17 22:59:00,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:00,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354949268] [2020-04-17 22:59:00,116 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:00,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:00,183 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:00,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354949268] [2020-04-17 22:59:00,184 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735694915] [2020-04-17 22:59:00,184 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 22:59:00,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:00,225 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:59:00,226 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:00,304 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:59:00,313 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:00,313 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:00,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:59:00,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538431163] [2020-04-17 22:59:00,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:59:00,314 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:00,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:59:00,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:59:00,314 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-04-17 22:59:00,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:00,586 INFO L93 Difference]: Finished difference Result 191 states and 460 transitions. [2020-04-17 22:59:00,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 22:59:00,586 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:59:00,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:00,587 INFO L225 Difference]: With dead ends: 191 [2020-04-17 22:59:00,587 INFO L226 Difference]: Without dead ends: 186 [2020-04-17 22:59:00,588 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2020-04-17 22:59:00,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-04-17 22:59:00,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 144. [2020-04-17 22:59:00,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-04-17 22:59:00,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-04-17 22:59:00,591 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-04-17 22:59:00,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:00,591 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-04-17 22:59:00,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:59:00,591 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-04-17 22:59:00,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:59:00,592 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:00,592 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:00,792 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:00,793 INFO L427 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:00,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:00,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1705081378, now seen corresponding path program 104 times [2020-04-17 22:59:00,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:00,794 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385003845] [2020-04-17 22:59:00,794 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:00,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:00,861 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:00,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385003845] [2020-04-17 22:59:00,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383663868] [2020-04-17 22:59:00,862 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 22:59:00,901 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:59:00,901 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:00,902 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:59:00,902 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:00,980 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:59:00,999 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:01,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:01,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:59:01,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177911718] [2020-04-17 22:59:01,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:59:01,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:01,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:59:01,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:59:01,001 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-04-17 22:59:01,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:01,487 INFO L93 Difference]: Finished difference Result 232 states and 551 transitions. [2020-04-17 22:59:01,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 22:59:01,487 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:59:01,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:01,488 INFO L225 Difference]: With dead ends: 232 [2020-04-17 22:59:01,489 INFO L226 Difference]: Without dead ends: 227 [2020-04-17 22:59:01,489 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=280, Invalid=650, Unknown=0, NotChecked=0, Total=930 [2020-04-17 22:59:01,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-04-17 22:59:01,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 142. [2020-04-17 22:59:01,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 22:59:01,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-04-17 22:59:01,493 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-04-17 22:59:01,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:01,493 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-04-17 22:59:01,493 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:59:01,493 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-04-17 22:59:01,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:59:01,493 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:01,493 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:01,694 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:01,694 INFO L427 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:01,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:01,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1705073907, now seen corresponding path program 105 times [2020-04-17 22:59:01,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:01,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069603655] [2020-04-17 22:59:01,696 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:01,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:01,762 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:01,762 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069603655] [2020-04-17 22:59:01,762 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112575575] [2020-04-17 22:59:01,763 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 22:59:01,803 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 22:59:01,803 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:01,803 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:59:01,804 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:01,911 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:01,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:01,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:59:01,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722539590] [2020-04-17 22:59:01,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:59:01,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:01,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:59:01,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:59:01,913 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-04-17 22:59:02,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:02,377 INFO L93 Difference]: Finished difference Result 222 states and 521 transitions. [2020-04-17 22:59:02,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 22:59:02,377 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:59:02,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:02,378 INFO L225 Difference]: With dead ends: 222 [2020-04-17 22:59:02,378 INFO L226 Difference]: Without dead ends: 220 [2020-04-17 22:59:02,379 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=277, Invalid=653, Unknown=0, NotChecked=0, Total=930 [2020-04-17 22:59:02,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-04-17 22:59:02,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 144. [2020-04-17 22:59:02,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-04-17 22:59:02,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-04-17 22:59:02,382 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-04-17 22:59:02,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:02,382 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-04-17 22:59:02,382 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:59:02,382 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-04-17 22:59:02,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:59:02,383 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:02,383 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:02,583 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:02,583 INFO L427 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:02,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:02,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1705052548, now seen corresponding path program 106 times [2020-04-17 22:59:02,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:02,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257879113] [2020-04-17 22:59:02,585 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:02,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:02,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:02,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257879113] [2020-04-17 22:59:02,649 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58150710] [2020-04-17 22:59:02,649 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 22:59:02,692 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:59:02,692 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:02,692 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:59:02,693 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:02,926 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:59:02,945 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:02,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:02,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:59:02,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961206857] [2020-04-17 22:59:02,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:59:02,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:02,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:59:02,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:59:02,947 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-04-17 22:59:03,260 WARN L192 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2020-04-17 22:59:05,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:05,121 INFO L93 Difference]: Finished difference Result 254 states and 608 transitions. [2020-04-17 22:59:05,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 22:59:05,122 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:59:05,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:05,123 INFO L225 Difference]: With dead ends: 254 [2020-04-17 22:59:05,123 INFO L226 Difference]: Without dead ends: 246 [2020-04-17 22:59:05,123 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=345, Invalid=776, Unknown=1, NotChecked=0, Total=1122 [2020-04-17 22:59:05,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-04-17 22:59:05,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 146. [2020-04-17 22:59:05,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-04-17 22:59:05,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 370 transitions. [2020-04-17 22:59:05,127 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 370 transitions. Word has length 13 [2020-04-17 22:59:05,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:05,128 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 370 transitions. [2020-04-17 22:59:05,128 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:59:05,128 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 370 transitions. [2020-04-17 22:59:05,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:59:05,128 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:05,129 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:05,332 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:05,332 INFO L427 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:05,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:05,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1705051587, now seen corresponding path program 107 times [2020-04-17 22:59:05,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:05,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102520858] [2020-04-17 22:59:05,333 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:05,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:05,404 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:05,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102520858] [2020-04-17 22:59:05,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120794773] [2020-04-17 22:59:05,405 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 22:59:05,444 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 22:59:05,444 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:05,445 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:59:05,445 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:05,564 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:59:06,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:06,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:06,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 22:59:06,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720260334] [2020-04-17 22:59:06,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:59:06,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:06,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:59:06,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=172, Unknown=1, NotChecked=0, Total=240 [2020-04-17 22:59:06,039 INFO L87 Difference]: Start difference. First operand 146 states and 370 transitions. Second operand 16 states. [2020-04-17 22:59:07,265 WARN L192 SmtUtils]: Spent 627.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2020-04-17 22:59:11,614 WARN L192 SmtUtils]: Spent 846.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2020-04-17 22:59:18,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:18,913 INFO L93 Difference]: Finished difference Result 255 states and 599 transitions. [2020-04-17 22:59:18,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-04-17 22:59:18,914 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-04-17 22:59:18,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:18,914 INFO L225 Difference]: With dead ends: 255 [2020-04-17 22:59:18,915 INFO L226 Difference]: Without dead ends: 247 [2020-04-17 22:59:18,915 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=449, Invalid=1101, Unknown=10, NotChecked=0, Total=1560 [2020-04-17 22:59:18,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-04-17 22:59:18,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 139. [2020-04-17 22:59:18,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-04-17 22:59:18,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 344 transitions. [2020-04-17 22:59:18,919 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 344 transitions. Word has length 13 [2020-04-17 22:59:18,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:18,919 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 344 transitions. [2020-04-17 22:59:18,919 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:59:18,920 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 344 transitions. [2020-04-17 22:59:18,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:59:18,920 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:18,920 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:19,123 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:19,123 INFO L427 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:19,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:19,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1704843267, now seen corresponding path program 108 times [2020-04-17 22:59:19,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:19,124 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498629367] [2020-04-17 22:59:19,124 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:19,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:19,189 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:19,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498629367] [2020-04-17 22:59:19,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872544928] [2020-04-17 22:59:19,190 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 22:59:19,232 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 22:59:19,232 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:19,233 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:59:19,233 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:19,328 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:19,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:19,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:59:19,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372516117] [2020-04-17 22:59:19,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:59:19,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:19,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:59:19,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:59:19,330 INFO L87 Difference]: Start difference. First operand 139 states and 344 transitions. Second operand 15 states. [2020-04-17 22:59:19,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:19,673 INFO L93 Difference]: Finished difference Result 208 states and 483 transitions. [2020-04-17 22:59:19,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 22:59:19,673 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:59:19,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:19,674 INFO L225 Difference]: With dead ends: 208 [2020-04-17 22:59:19,675 INFO L226 Difference]: Without dead ends: 206 [2020-04-17 22:59:19,675 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=205, Invalid=497, Unknown=0, NotChecked=0, Total=702 [2020-04-17 22:59:19,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-04-17 22:59:19,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 136. [2020-04-17 22:59:19,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-04-17 22:59:19,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 337 transitions. [2020-04-17 22:59:19,678 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 337 transitions. Word has length 13 [2020-04-17 22:59:19,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:19,678 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 337 transitions. [2020-04-17 22:59:19,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:59:19,678 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 337 transitions. [2020-04-17 22:59:19,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:59:19,679 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:19,679 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:19,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:19,880 INFO L427 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:19,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:19,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1704180177, now seen corresponding path program 109 times [2020-04-17 22:59:19,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:19,881 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110008338] [2020-04-17 22:59:19,881 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:19,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:19,940 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:19,941 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110008338] [2020-04-17 22:59:19,941 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129853864] [2020-04-17 22:59:19,941 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 22:59:19,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:19,984 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:59:19,985 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:20,093 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:20,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:20,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:59:20,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219485402] [2020-04-17 22:59:20,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:59:20,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:20,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:59:20,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:59:20,094 INFO L87 Difference]: Start difference. First operand 136 states and 337 transitions. Second operand 15 states. [2020-04-17 22:59:20,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:20,542 INFO L93 Difference]: Finished difference Result 215 states and 507 transitions. [2020-04-17 22:59:20,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 22:59:20,542 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:59:20,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:20,543 INFO L225 Difference]: With dead ends: 215 [2020-04-17 22:59:20,543 INFO L226 Difference]: Without dead ends: 213 [2020-04-17 22:59:20,544 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=265, Invalid=605, Unknown=0, NotChecked=0, Total=870 [2020-04-17 22:59:20,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-04-17 22:59:20,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 137. [2020-04-17 22:59:20,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-04-17 22:59:20,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-04-17 22:59:20,547 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-04-17 22:59:20,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:20,547 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-04-17 22:59:20,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:59:20,548 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-04-17 22:59:20,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:59:20,548 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:20,548 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:20,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:20,749 INFO L427 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:20,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:20,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1704158818, now seen corresponding path program 110 times [2020-04-17 22:59:20,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:20,750 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606759905] [2020-04-17 22:59:20,750 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:20,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:20,823 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:20,824 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606759905] [2020-04-17 22:59:20,824 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987774155] [2020-04-17 22:59:20,824 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 22:59:20,872 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:59:20,872 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:20,873 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:59:20,874 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:20,956 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:59:20,964 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:20,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:20,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:59:20,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016601917] [2020-04-17 22:59:20,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:59:20,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:20,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:59:20,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:59:20,966 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-04-17 22:59:21,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:21,452 INFO L93 Difference]: Finished difference Result 236 states and 563 transitions. [2020-04-17 22:59:21,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 22:59:21,452 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:59:21,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:21,453 INFO L225 Difference]: With dead ends: 236 [2020-04-17 22:59:21,453 INFO L226 Difference]: Without dead ends: 228 [2020-04-17 22:59:21,454 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-04-17 22:59:21,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-04-17 22:59:21,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 137. [2020-04-17 22:59:21,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-04-17 22:59:21,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-04-17 22:59:21,456 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-04-17 22:59:21,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:21,457 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-04-17 22:59:21,457 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:59:21,457 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-04-17 22:59:21,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:59:21,457 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:21,457 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:21,658 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:21,658 INFO L427 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:21,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:21,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1704157857, now seen corresponding path program 111 times [2020-04-17 22:59:21,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:21,659 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383573296] [2020-04-17 22:59:21,659 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:21,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:21,727 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:21,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383573296] [2020-04-17 22:59:21,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584033455] [2020-04-17 22:59:21,728 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 22:59:21,771 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 22:59:21,771 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:21,772 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:59:21,773 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:21,843 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:59:21,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:21,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:21,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:59:21,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113177885] [2020-04-17 22:59:21,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:59:21,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:21,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:59:21,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:59:21,851 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-04-17 22:59:22,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:22,382 INFO L93 Difference]: Finished difference Result 241 states and 576 transitions. [2020-04-17 22:59:22,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 22:59:22,382 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:59:22,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:22,383 INFO L225 Difference]: With dead ends: 241 [2020-04-17 22:59:22,384 INFO L226 Difference]: Without dead ends: 233 [2020-04-17 22:59:22,384 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-04-17 22:59:22,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-04-17 22:59:22,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 133. [2020-04-17 22:59:22,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-04-17 22:59:22,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 324 transitions. [2020-04-17 22:59:22,387 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 324 transitions. Word has length 13 [2020-04-17 22:59:22,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:22,388 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 324 transitions. [2020-04-17 22:59:22,388 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:59:22,388 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 324 transitions. [2020-04-17 22:59:22,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:59:22,388 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:22,388 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:22,591 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:22,592 INFO L427 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:22,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:22,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1704129027, now seen corresponding path program 112 times [2020-04-17 22:59:22,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:22,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604037984] [2020-04-17 22:59:22,593 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:22,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:22,659 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:22,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604037984] [2020-04-17 22:59:22,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631283974] [2020-04-17 22:59:22,660 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 22:59:22,699 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:59:22,699 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:22,700 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:59:22,700 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:22,773 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:59:22,783 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:22,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:22,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:59:22,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735820334] [2020-04-17 22:59:22,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:59:22,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:22,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:59:22,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:59:22,785 INFO L87 Difference]: Start difference. First operand 133 states and 324 transitions. Second operand 15 states. [2020-04-17 22:59:23,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:23,298 INFO L93 Difference]: Finished difference Result 232 states and 545 transitions. [2020-04-17 22:59:23,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 22:59:23,298 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:59:23,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:23,299 INFO L225 Difference]: With dead ends: 232 [2020-04-17 22:59:23,299 INFO L226 Difference]: Without dead ends: 224 [2020-04-17 22:59:23,300 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-04-17 22:59:23,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-04-17 22:59:23,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 130. [2020-04-17 22:59:23,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-04-17 22:59:23,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 305 transitions. [2020-04-17 22:59:23,303 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 305 transitions. Word has length 13 [2020-04-17 22:59:23,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:23,303 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 305 transitions. [2020-04-17 22:59:23,304 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:59:23,304 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 305 transitions. [2020-04-17 22:59:23,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:59:23,304 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:23,304 INFO L425 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:23,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:23,508 INFO L427 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:23,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:23,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1141268816, now seen corresponding path program 6 times [2020-04-17 22:59:23,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:23,508 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500820167] [2020-04-17 22:59:23,508 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:23,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:23,612 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:23,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500820167] [2020-04-17 22:59:23,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343631640] [2020-04-17 22:59:23,612 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 22:59:23,654 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-04-17 22:59:23,655 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:23,655 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 22:59:23,656 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:23,805 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:59:23,831 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:23,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:23,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-04-17 22:59:23,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498438460] [2020-04-17 22:59:23,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 22:59:23,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:23,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 22:59:23,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-04-17 22:59:23,833 INFO L87 Difference]: Start difference. First operand 130 states and 305 transitions. Second operand 18 states. [2020-04-17 22:59:24,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:24,141 INFO L93 Difference]: Finished difference Result 185 states and 431 transitions. [2020-04-17 22:59:24,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 22:59:24,141 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 13 [2020-04-17 22:59:24,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:24,143 INFO L225 Difference]: With dead ends: 185 [2020-04-17 22:59:24,143 INFO L226 Difference]: Without dead ends: 180 [2020-04-17 22:59:24,143 INFO L678 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 [2020-04-17 22:59:24,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-04-17 22:59:24,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 139. [2020-04-17 22:59:24,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-04-17 22:59:24,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-04-17 22:59:24,147 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-04-17 22:59:24,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:24,148 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-04-17 22:59:24,148 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 22:59:24,148 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-04-17 22:59:24,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:59:24,149 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:24,149 INFO L425 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:24,353 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:24,353 INFO L427 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:24,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:24,354 INFO L82 PathProgramCache]: Analyzing trace with hash 33766584, now seen corresponding path program 21 times [2020-04-17 22:59:24,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:24,354 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265132614] [2020-04-17 22:59:24,354 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:24,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:24,549 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:24,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265132614] [2020-04-17 22:59:24,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351104393] [2020-04-17 22:59:24,550 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 22:59:24,620 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-04-17 22:59:24,620 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:24,621 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 22:59:24,622 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:24,824 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:24,824 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:24,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 22:59:24,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670177942] [2020-04-17 22:59:24,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 22:59:24,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:24,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 22:59:24,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:59:24,826 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 17 states. [2020-04-17 22:59:24,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:24,873 INFO L93 Difference]: Finished difference Result 180 states and 423 transitions. [2020-04-17 22:59:24,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 22:59:24,874 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-04-17 22:59:24,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:24,875 INFO L225 Difference]: With dead ends: 180 [2020-04-17 22:59:24,875 INFO L226 Difference]: Without dead ends: 177 [2020-04-17 22:59:24,875 INFO L678 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 [2020-04-17 22:59:24,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-04-17 22:59:24,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 148. [2020-04-17 22:59:24,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-04-17 22:59:24,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 362 transitions. [2020-04-17 22:59:24,878 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 362 transitions. Word has length 13 [2020-04-17 22:59:24,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:24,879 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 362 transitions. [2020-04-17 22:59:24,879 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 22:59:24,879 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 362 transitions. [2020-04-17 22:59:24,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:59:24,879 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:24,880 INFO L425 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:25,083 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:25,083 INFO L427 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:25,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:25,084 INFO L82 PathProgramCache]: Analyzing trace with hash -913710200, now seen corresponding path program 22 times [2020-04-17 22:59:25,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:25,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955712600] [2020-04-17 22:59:25,084 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:25,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:25,209 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:25,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955712600] [2020-04-17 22:59:25,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481768110] [2020-04-17 22:59:25,210 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 22:59:25,251 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:59:25,252 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:25,252 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 22:59:25,253 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:25,379 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:25,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:25,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 22:59:25,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051525956] [2020-04-17 22:59:25,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 22:59:25,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:25,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 22:59:25,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:59:25,380 INFO L87 Difference]: Start difference. First operand 148 states and 362 transitions. Second operand 17 states. [2020-04-17 22:59:25,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:25,457 INFO L93 Difference]: Finished difference Result 197 states and 456 transitions. [2020-04-17 22:59:25,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 22:59:25,457 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-04-17 22:59:25,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:25,458 INFO L225 Difference]: With dead ends: 197 [2020-04-17 22:59:25,458 INFO L226 Difference]: Without dead ends: 194 [2020-04-17 22:59:25,458 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-04-17 22:59:25,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-04-17 22:59:25,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 148. [2020-04-17 22:59:25,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-04-17 22:59:25,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 362 transitions. [2020-04-17 22:59:25,462 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 362 transitions. Word has length 13 [2020-04-17 22:59:25,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:25,462 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 362 transitions. [2020-04-17 22:59:25,462 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 22:59:25,462 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 362 transitions. [2020-04-17 22:59:25,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:59:25,463 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:25,463 INFO L425 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:25,663 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:25,664 INFO L427 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:25,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:25,664 INFO L82 PathProgramCache]: Analyzing trace with hash -1775557960, now seen corresponding path program 23 times [2020-04-17 22:59:25,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:25,665 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302020878] [2020-04-17 22:59:25,665 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:25,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:25,782 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:25,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302020878] [2020-04-17 22:59:25,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081491811] [2020-04-17 22:59:25,783 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 22:59:25,830 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-04-17 22:59:25,830 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:25,831 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 22:59:25,831 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:25,955 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:25,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:25,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 22:59:25,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928253127] [2020-04-17 22:59:25,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 22:59:25,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:25,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 22:59:25,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:59:25,957 INFO L87 Difference]: Start difference. First operand 148 states and 362 transitions. Second operand 17 states. [2020-04-17 22:59:26,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:26,061 INFO L93 Difference]: Finished difference Result 196 states and 456 transitions. [2020-04-17 22:59:26,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 22:59:26,062 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-04-17 22:59:26,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:26,062 INFO L225 Difference]: With dead ends: 196 [2020-04-17 22:59:26,063 INFO L226 Difference]: Without dead ends: 193 [2020-04-17 22:59:26,063 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-04-17 22:59:26,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-04-17 22:59:26,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 149. [2020-04-17 22:59:26,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-04-17 22:59:26,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 367 transitions. [2020-04-17 22:59:26,066 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 367 transitions. Word has length 13 [2020-04-17 22:59:26,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:26,066 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 367 transitions. [2020-04-17 22:59:26,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 22:59:26,066 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 367 transitions. [2020-04-17 22:59:26,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:59:26,066 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:26,066 INFO L425 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:26,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:26,267 INFO L427 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:26,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:26,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1110622840, now seen corresponding path program 24 times [2020-04-17 22:59:26,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:26,268 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894926275] [2020-04-17 22:59:26,269 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:26,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:26,364 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:26,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894926275] [2020-04-17 22:59:26,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660583102] [2020-04-17 22:59:26,365 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 22:59:26,406 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-04-17 22:59:26,407 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:26,407 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 22:59:26,408 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:26,543 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:26,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:26,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 22:59:26,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306035295] [2020-04-17 22:59:26,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 22:59:26,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:26,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 22:59:26,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:59:26,544 INFO L87 Difference]: Start difference. First operand 149 states and 367 transitions. Second operand 17 states. [2020-04-17 22:59:26,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:26,668 INFO L93 Difference]: Finished difference Result 195 states and 456 transitions. [2020-04-17 22:59:26,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:59:26,668 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-04-17 22:59:26,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:26,669 INFO L225 Difference]: With dead ends: 195 [2020-04-17 22:59:26,669 INFO L226 Difference]: Without dead ends: 192 [2020-04-17 22:59:26,670 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2020-04-17 22:59:26,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-04-17 22:59:26,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 150. [2020-04-17 22:59:26,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-04-17 22:59:26,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 372 transitions. [2020-04-17 22:59:26,673 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 372 transitions. Word has length 13 [2020-04-17 22:59:26,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:26,673 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 372 transitions. [2020-04-17 22:59:26,673 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 22:59:26,673 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 372 transitions. [2020-04-17 22:59:26,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:59:26,673 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:26,673 INFO L425 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:26,874 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:26,874 INFO L427 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:26,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:26,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1089173320, now seen corresponding path program 25 times [2020-04-17 22:59:26,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:26,875 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080799964] [2020-04-17 22:59:26,875 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:26,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:26,986 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:26,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080799964] [2020-04-17 22:59:26,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620220941] [2020-04-17 22:59:26,986 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 22:59:27,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:27,028 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 22:59:27,028 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:27,154 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:27,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:27,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 22:59:27,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849293658] [2020-04-17 22:59:27,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 22:59:27,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:27,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 22:59:27,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:59:27,155 INFO L87 Difference]: Start difference. First operand 150 states and 372 transitions. Second operand 17 states. [2020-04-17 22:59:27,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:27,312 INFO L93 Difference]: Finished difference Result 194 states and 456 transitions. [2020-04-17 22:59:27,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 22:59:27,313 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-04-17 22:59:27,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:27,314 INFO L225 Difference]: With dead ends: 194 [2020-04-17 22:59:27,314 INFO L226 Difference]: Without dead ends: 191 [2020-04-17 22:59:27,314 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-04-17 22:59:27,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-04-17 22:59:27,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 152. [2020-04-17 22:59:27,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-04-17 22:59:27,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 379 transitions. [2020-04-17 22:59:27,318 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 379 transitions. Word has length 13 [2020-04-17 22:59:27,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:27,318 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 379 transitions. [2020-04-17 22:59:27,318 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 22:59:27,319 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 379 transitions. [2020-04-17 22:59:27,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:59:27,319 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:27,319 INFO L425 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:27,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:27,523 INFO L427 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:27,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:27,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1088481400, now seen corresponding path program 26 times [2020-04-17 22:59:27,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:27,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441249238] [2020-04-17 22:59:27,523 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:27,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:27,610 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:27,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441249238] [2020-04-17 22:59:27,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381658857] [2020-04-17 22:59:27,610 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 22:59:27,654 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:59:27,654 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:27,654 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 22:59:27,655 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:27,798 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:27,798 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:27,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 22:59:27,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627137443] [2020-04-17 22:59:27,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 22:59:27,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:27,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 22:59:27,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:59:27,799 INFO L87 Difference]: Start difference. First operand 152 states and 379 transitions. Second operand 17 states. [2020-04-17 22:59:27,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:27,991 INFO L93 Difference]: Finished difference Result 193 states and 456 transitions. [2020-04-17 22:59:27,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 22:59:27,992 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-04-17 22:59:27,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:27,993 INFO L225 Difference]: With dead ends: 193 [2020-04-17 22:59:27,993 INFO L226 Difference]: Without dead ends: 190 [2020-04-17 22:59:27,993 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-04-17 22:59:27,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-04-17 22:59:27,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 154. [2020-04-17 22:59:27,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-04-17 22:59:27,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 386 transitions. [2020-04-17 22:59:27,996 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 386 transitions. Word has length 13 [2020-04-17 22:59:27,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:27,997 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 386 transitions. [2020-04-17 22:59:27,997 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 22:59:27,997 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 386 transitions. [2020-04-17 22:59:27,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:59:27,997 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:27,997 INFO L425 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:28,198 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:28,198 INFO L427 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:28,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:28,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1088459080, now seen corresponding path program 27 times [2020-04-17 22:59:28,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:28,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669091079] [2020-04-17 22:59:28,199 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:28,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:28,292 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:28,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669091079] [2020-04-17 22:59:28,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059628068] [2020-04-17 22:59:28,293 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 22:59:28,336 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-04-17 22:59:28,336 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:28,337 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 22:59:28,337 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:28,456 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:59:28,465 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:28,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:28,465 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 22:59:28,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793664263] [2020-04-17 22:59:28,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 22:59:28,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:28,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 22:59:28,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:59:28,466 INFO L87 Difference]: Start difference. First operand 154 states and 386 transitions. Second operand 17 states. [2020-04-17 22:59:28,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:28,699 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-04-17 22:59:28,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 22:59:28,700 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-04-17 22:59:28,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:28,701 INFO L225 Difference]: With dead ends: 202 [2020-04-17 22:59:28,701 INFO L226 Difference]: Without dead ends: 196 [2020-04-17 22:59:28,701 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2020-04-17 22:59:28,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-04-17 22:59:28,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 151. [2020-04-17 22:59:28,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-04-17 22:59:28,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 382 transitions. [2020-04-17 22:59:28,705 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 382 transitions. Word has length 13 [2020-04-17 22:59:28,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:28,706 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 382 transitions. [2020-04-17 22:59:28,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 22:59:28,706 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 382 transitions. [2020-04-17 22:59:28,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 22:59:28,706 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:28,706 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:28,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:28,910 INFO L427 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:28,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:28,910 INFO L82 PathProgramCache]: Analyzing trace with hash -195697579, now seen corresponding path program 113 times [2020-04-17 22:59:28,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:28,911 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517112858] [2020-04-17 22:59:28,911 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:28,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:29,002 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:29,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517112858] [2020-04-17 22:59:29,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430244766] [2020-04-17 22:59:29,003 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 22:59:29,045 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 22:59:29,045 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:29,046 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 22:59:29,046 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:29,181 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:29,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:29,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 22:59:29,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146016434] [2020-04-17 22:59:29,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 22:59:29,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:29,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 22:59:29,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:59:29,183 INFO L87 Difference]: Start difference. First operand 151 states and 382 transitions. Second operand 17 states. [2020-04-17 22:59:29,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:29,250 INFO L93 Difference]: Finished difference Result 188 states and 456 transitions. [2020-04-17 22:59:29,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 22:59:29,251 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 22:59:29,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:29,251 INFO L225 Difference]: With dead ends: 188 [2020-04-17 22:59:29,252 INFO L226 Difference]: Without dead ends: 186 [2020-04-17 22:59:29,252 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:59:29,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-04-17 22:59:29,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 159. [2020-04-17 22:59:29,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-04-17 22:59:29,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 406 transitions. [2020-04-17 22:59:29,255 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 406 transitions. Word has length 14 [2020-04-17 22:59:29,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:29,256 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 406 transitions. [2020-04-17 22:59:29,256 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 22:59:29,256 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 406 transitions. [2020-04-17 22:59:29,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 22:59:29,256 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:29,256 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:29,457 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:29,457 INFO L427 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:29,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:29,458 INFO L82 PathProgramCache]: Analyzing trace with hash -195696618, now seen corresponding path program 114 times [2020-04-17 22:59:29,458 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:29,458 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74435554] [2020-04-17 22:59:29,458 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:29,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:29,552 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:29,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74435554] [2020-04-17 22:59:29,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767703915] [2020-04-17 22:59:29,553 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 22:59:29,598 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 22:59:29,599 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:29,599 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 22:59:29,599 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:29,739 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:29,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:29,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 22:59:29,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102001208] [2020-04-17 22:59:29,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 22:59:29,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:29,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 22:59:29,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:59:29,741 INFO L87 Difference]: Start difference. First operand 159 states and 406 transitions. Second operand 17 states. [2020-04-17 22:59:29,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:29,924 INFO L93 Difference]: Finished difference Result 199 states and 478 transitions. [2020-04-17 22:59:29,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 22:59:29,924 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 22:59:29,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:29,925 INFO L225 Difference]: With dead ends: 199 [2020-04-17 22:59:29,925 INFO L226 Difference]: Without dead ends: 197 [2020-04-17 22:59:29,925 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2020-04-17 22:59:29,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-04-17 22:59:29,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 157. [2020-04-17 22:59:29,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-04-17 22:59:29,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 400 transitions. [2020-04-17 22:59:29,929 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 400 transitions. Word has length 14 [2020-04-17 22:59:29,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:29,930 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 400 transitions. [2020-04-17 22:59:29,930 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 22:59:29,930 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 400 transitions. [2020-04-17 22:59:29,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 22:59:29,930 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:29,930 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:30,133 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:30,134 INFO L427 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:30,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:30,134 INFO L82 PathProgramCache]: Analyzing trace with hash -195667788, now seen corresponding path program 115 times [2020-04-17 22:59:30,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:30,135 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563962231] [2020-04-17 22:59:30,135 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:30,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:30,255 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:30,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563962231] [2020-04-17 22:59:30,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583888430] [2020-04-17 22:59:30,256 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 22:59:30,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:30,316 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 22:59:30,317 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:37,114 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:37,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:37,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 22:59:37,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656769298] [2020-04-17 22:59:37,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 22:59:37,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:37,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 22:59:37,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=183, Unknown=1, NotChecked=0, Total=272 [2020-04-17 22:59:37,115 INFO L87 Difference]: Start difference. First operand 157 states and 400 transitions. Second operand 17 states. [2020-04-17 22:59:37,646 WARN L192 SmtUtils]: Spent 445.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-04-17 22:59:37,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:37,956 INFO L93 Difference]: Finished difference Result 210 states and 500 transitions. [2020-04-17 22:59:37,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 22:59:37,956 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 22:59:37,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:37,957 INFO L225 Difference]: With dead ends: 210 [2020-04-17 22:59:37,957 INFO L226 Difference]: Without dead ends: 208 [2020-04-17 22:59:37,958 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=174, Invalid=331, Unknown=1, NotChecked=0, Total=506 [2020-04-17 22:59:37,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-04-17 22:59:37,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 155. [2020-04-17 22:59:37,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-04-17 22:59:37,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 394 transitions. [2020-04-17 22:59:37,961 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 394 transitions. Word has length 14 [2020-04-17 22:59:37,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:37,961 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 394 transitions. [2020-04-17 22:59:37,962 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 22:59:37,962 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 394 transitions. [2020-04-17 22:59:37,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 22:59:37,962 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:37,962 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:38,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:38,165 INFO L427 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:38,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:38,166 INFO L82 PathProgramCache]: Analyzing trace with hash -194774058, now seen corresponding path program 116 times [2020-04-17 22:59:38,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:38,166 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935746205] [2020-04-17 22:59:38,166 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:38,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:38,256 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:38,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935746205] [2020-04-17 22:59:38,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464538932] [2020-04-17 22:59:38,257 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 22:59:38,297 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:59:38,297 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:38,298 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 22:59:38,298 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:40,116 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:40,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:40,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-04-17 22:59:40,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106857452] [2020-04-17 22:59:40,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 22:59:40,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:40,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 22:59:40,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=204, Unknown=3, NotChecked=0, Total=306 [2020-04-17 22:59:40,117 INFO L87 Difference]: Start difference. First operand 155 states and 394 transitions. Second operand 18 states. [2020-04-17 22:59:40,840 WARN L192 SmtUtils]: Spent 527.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-04-17 22:59:44,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:44,013 INFO L93 Difference]: Finished difference Result 214 states and 508 transitions. [2020-04-17 22:59:44,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 22:59:44,013 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-04-17 22:59:44,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:44,014 INFO L225 Difference]: With dead ends: 214 [2020-04-17 22:59:44,014 INFO L226 Difference]: Without dead ends: 212 [2020-04-17 22:59:44,014 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=209, Invalid=388, Unknown=3, NotChecked=0, Total=600 [2020-04-17 22:59:44,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-04-17 22:59:44,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 157. [2020-04-17 22:59:44,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-04-17 22:59:44,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 400 transitions. [2020-04-17 22:59:44,018 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 400 transitions. Word has length 14 [2020-04-17 22:59:44,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:44,018 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 400 transitions. [2020-04-17 22:59:44,018 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 22:59:44,019 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 400 transitions. [2020-04-17 22:59:44,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 22:59:44,019 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:44,019 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:44,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:44,222 INFO L427 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:44,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:44,223 INFO L82 PathProgramCache]: Analyzing trace with hash -194773097, now seen corresponding path program 117 times [2020-04-17 22:59:44,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:44,224 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706259832] [2020-04-17 22:59:44,224 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:44,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:44,317 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:44,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706259832] [2020-04-17 22:59:44,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939247246] [2020-04-17 22:59:44,317 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 22:59:44,356 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 22:59:44,356 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:44,356 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 22:59:44,357 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:44,529 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:44,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:44,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 22:59:44,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133451437] [2020-04-17 22:59:44,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 22:59:44,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:44,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 22:59:44,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:59:44,531 INFO L87 Difference]: Start difference. First operand 157 states and 400 transitions. Second operand 17 states. [2020-04-17 22:59:44,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:44,790 INFO L93 Difference]: Finished difference Result 218 states and 517 transitions. [2020-04-17 22:59:44,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 22:59:44,790 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 22:59:44,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:44,791 INFO L225 Difference]: With dead ends: 218 [2020-04-17 22:59:44,791 INFO L226 Difference]: Without dead ends: 216 [2020-04-17 22:59:44,792 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=185, Invalid=367, Unknown=0, NotChecked=0, Total=552 [2020-04-17 22:59:44,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-04-17 22:59:44,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 156. [2020-04-17 22:59:44,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-04-17 22:59:44,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-04-17 22:59:44,794 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-04-17 22:59:44,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:44,795 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-04-17 22:59:44,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 22:59:44,795 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-04-17 22:59:44,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 22:59:44,795 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:44,795 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:44,996 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:44,996 INFO L427 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:44,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:44,997 INFO L82 PathProgramCache]: Analyzing trace with hash -194744267, now seen corresponding path program 118 times [2020-04-17 22:59:44,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:44,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752890457] [2020-04-17 22:59:44,997 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:45,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:45,089 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:45,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752890457] [2020-04-17 22:59:45,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964992410] [2020-04-17 22:59:45,090 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 22:59:45,132 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:59:45,133 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:45,133 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 22:59:45,134 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:45,321 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:45,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:45,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 22:59:45,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49063523] [2020-04-17 22:59:45,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 22:59:45,322 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:45,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 22:59:45,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:59:45,322 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-04-17 22:59:45,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:45,609 INFO L93 Difference]: Finished difference Result 212 states and 507 transitions. [2020-04-17 22:59:45,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 22:59:45,609 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 22:59:45,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:45,610 INFO L225 Difference]: With dead ends: 212 [2020-04-17 22:59:45,610 INFO L226 Difference]: Without dead ends: 210 [2020-04-17 22:59:45,611 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2020-04-17 22:59:45,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-04-17 22:59:45,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 153. [2020-04-17 22:59:45,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-04-17 22:59:45,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 388 transitions. [2020-04-17 22:59:45,620 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 388 transitions. Word has length 14 [2020-04-17 22:59:45,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:45,620 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 388 transitions. [2020-04-17 22:59:45,620 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 22:59:45,620 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 388 transitions. [2020-04-17 22:59:45,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 22:59:45,621 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:45,621 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:45,824 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:45,824 INFO L427 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:45,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:45,824 INFO L82 PathProgramCache]: Analyzing trace with hash -167068428, now seen corresponding path program 119 times [2020-04-17 22:59:45,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:45,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775889945] [2020-04-17 22:59:45,825 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:45,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:45,907 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:45,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775889945] [2020-04-17 22:59:45,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031699199] [2020-04-17 22:59:45,908 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 22:59:45,947 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 22:59:45,947 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:45,948 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 22:59:45,948 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:46,070 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:46,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:46,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 22:59:46,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215133026] [2020-04-17 22:59:46,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 22:59:46,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:46,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 22:59:46,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:59:46,071 INFO L87 Difference]: Start difference. First operand 153 states and 388 transitions. Second operand 17 states. [2020-04-17 22:59:46,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:46,339 INFO L93 Difference]: Finished difference Result 212 states and 504 transitions. [2020-04-17 22:59:46,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 22:59:46,339 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 22:59:46,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:46,340 INFO L225 Difference]: With dead ends: 212 [2020-04-17 22:59:46,340 INFO L226 Difference]: Without dead ends: 210 [2020-04-17 22:59:46,341 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2020-04-17 22:59:46,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-04-17 22:59:46,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 156. [2020-04-17 22:59:46,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-04-17 22:59:46,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-04-17 22:59:46,344 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-04-17 22:59:46,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:46,344 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-04-17 22:59:46,344 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 22:59:46,344 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-04-17 22:59:46,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 22:59:46,344 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:46,344 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:46,545 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:46,545 INFO L427 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:46,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:46,546 INFO L82 PathProgramCache]: Analyzing trace with hash -167067467, now seen corresponding path program 120 times [2020-04-17 22:59:46,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:46,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872874970] [2020-04-17 22:59:46,546 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:46,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:46,639 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:46,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872874970] [2020-04-17 22:59:46,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377504650] [2020-04-17 22:59:46,640 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 22:59:46,676 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 22:59:46,676 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:46,677 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 22:59:46,677 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:47,171 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:47,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:47,172 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 22:59:47,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292652119] [2020-04-17 22:59:47,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 22:59:47,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:47,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 22:59:47,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:59:47,173 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-04-17 22:59:47,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:47,476 INFO L93 Difference]: Finished difference Result 224 states and 529 transitions. [2020-04-17 22:59:47,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 22:59:47,476 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 22:59:47,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:47,477 INFO L225 Difference]: With dead ends: 224 [2020-04-17 22:59:47,477 INFO L226 Difference]: Without dead ends: 222 [2020-04-17 22:59:47,477 INFO L678 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 [2020-04-17 22:59:47,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-04-17 22:59:47,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 156. [2020-04-17 22:59:47,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-04-17 22:59:47,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-04-17 22:59:47,481 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-04-17 22:59:47,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:47,481 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-04-17 22:59:47,482 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 22:59:47,482 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-04-17 22:59:47,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 22:59:47,482 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:47,482 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:47,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:47,685 INFO L427 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:47,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:47,685 INFO L82 PathProgramCache]: Analyzing trace with hash -167038637, now seen corresponding path program 121 times [2020-04-17 22:59:47,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:47,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982422502] [2020-04-17 22:59:47,686 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:47,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:47,789 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:47,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982422502] [2020-04-17 22:59:47,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31148139] [2020-04-17 22:59:47,790 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 22:59:47,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:47,834 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 22:59:47,834 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:47,980 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:47,981 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:47,981 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 22:59:47,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379362260] [2020-04-17 22:59:47,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 22:59:47,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:47,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 22:59:47,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:59:47,982 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-04-17 22:59:48,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:48,245 INFO L93 Difference]: Finished difference Result 218 states and 519 transitions. [2020-04-17 22:59:48,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 22:59:48,246 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 22:59:48,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:48,246 INFO L225 Difference]: With dead ends: 218 [2020-04-17 22:59:48,246 INFO L226 Difference]: Without dead ends: 216 [2020-04-17 22:59:48,247 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2020-04-17 22:59:48,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-04-17 22:59:48,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 156. [2020-04-17 22:59:48,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-04-17 22:59:48,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-04-17 22:59:48,250 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-04-17 22:59:48,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:48,250 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-04-17 22:59:48,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 22:59:48,250 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-04-17 22:59:48,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 22:59:48,251 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:48,251 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:48,451 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:48,452 INFO L427 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:48,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:48,452 INFO L82 PathProgramCache]: Analyzing trace with hash -166114155, now seen corresponding path program 122 times [2020-04-17 22:59:48,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:48,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828876487] [2020-04-17 22:59:48,453 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:48,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:48,567 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:48,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828876487] [2020-04-17 22:59:48,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445879601] [2020-04-17 22:59:48,568 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 22:59:48,610 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:59:48,610 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:48,611 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 22:59:48,611 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:48,731 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:48,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:48,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 22:59:48,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581118253] [2020-04-17 22:59:48,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 22:59:48,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:48,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 22:59:48,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:59:48,732 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-04-17 22:59:48,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:48,980 INFO L93 Difference]: Finished difference Result 206 states and 492 transitions. [2020-04-17 22:59:48,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:59:48,981 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 22:59:48,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:48,982 INFO L225 Difference]: With dead ends: 206 [2020-04-17 22:59:48,982 INFO L226 Difference]: Without dead ends: 204 [2020-04-17 22:59:48,982 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-04-17 22:59:48,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-04-17 22:59:48,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 154. [2020-04-17 22:59:48,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-04-17 22:59:48,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 389 transitions. [2020-04-17 22:59:48,985 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 389 transitions. Word has length 14 [2020-04-17 22:59:48,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:48,985 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 389 transitions. [2020-04-17 22:59:48,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 22:59:48,985 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 389 transitions. [2020-04-17 22:59:48,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 22:59:48,986 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:48,986 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:49,186 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:49,187 INFO L427 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:49,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:49,187 INFO L82 PathProgramCache]: Analyzing trace with hash 691806102, now seen corresponding path program 123 times [2020-04-17 22:59:49,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:49,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269677739] [2020-04-17 22:59:49,188 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:49,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:49,287 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:49,287 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269677739] [2020-04-17 22:59:49,287 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872855085] [2020-04-17 22:59:49,287 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 22:59:49,329 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-04-17 22:59:49,330 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:49,330 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 22:59:49,331 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:49,455 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:49,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:49,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 22:59:49,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905609854] [2020-04-17 22:59:49,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 22:59:49,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:49,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 22:59:49,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:59:49,456 INFO L87 Difference]: Start difference. First operand 154 states and 389 transitions. Second operand 17 states. [2020-04-17 22:59:49,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:49,700 INFO L93 Difference]: Finished difference Result 207 states and 495 transitions. [2020-04-17 22:59:49,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:59:49,701 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 22:59:49,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:49,701 INFO L225 Difference]: With dead ends: 207 [2020-04-17 22:59:49,701 INFO L226 Difference]: Without dead ends: 205 [2020-04-17 22:59:49,702 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-04-17 22:59:49,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-04-17 22:59:49,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 159. [2020-04-17 22:59:49,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-04-17 22:59:49,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 403 transitions. [2020-04-17 22:59:49,705 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 403 transitions. Word has length 14 [2020-04-17 22:59:49,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:49,705 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 403 transitions. [2020-04-17 22:59:49,705 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 22:59:49,705 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 403 transitions. [2020-04-17 22:59:49,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 22:59:49,706 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:49,706 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:49,906 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:49,907 INFO L427 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:49,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:49,907 INFO L82 PathProgramCache]: Analyzing trace with hash 691807063, now seen corresponding path program 124 times [2020-04-17 22:59:49,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:49,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893719435] [2020-04-17 22:59:49,908 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:49,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:50,009 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:50,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893719435] [2020-04-17 22:59:50,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031393444] [2020-04-17 22:59:50,009 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 22:59:50,050 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:59:50,051 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:50,052 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 22:59:50,052 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:51,186 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:51,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:51,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 22:59:51,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010976981] [2020-04-17 22:59:51,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 22:59:51,187 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:51,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 22:59:51,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:59:51,188 INFO L87 Difference]: Start difference. First operand 159 states and 403 transitions. Second operand 17 states. [2020-04-17 22:59:51,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:51,433 INFO L93 Difference]: Finished difference Result 217 states and 516 transitions. [2020-04-17 22:59:51,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 22:59:51,434 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 22:59:51,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:51,435 INFO L225 Difference]: With dead ends: 217 [2020-04-17 22:59:51,435 INFO L226 Difference]: Without dead ends: 215 [2020-04-17 22:59:51,435 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2020-04-17 22:59:51,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-04-17 22:59:51,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 158. [2020-04-17 22:59:51,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-04-17 22:59:51,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 400 transitions. [2020-04-17 22:59:51,439 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 400 transitions. Word has length 14 [2020-04-17 22:59:51,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:51,439 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 400 transitions. [2020-04-17 22:59:51,439 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 22:59:51,439 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 400 transitions. [2020-04-17 22:59:51,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 22:59:51,439 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:51,439 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:51,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:51,640 INFO L427 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:51,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:51,641 INFO L82 PathProgramCache]: Analyzing trace with hash 691835893, now seen corresponding path program 125 times [2020-04-17 22:59:51,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:51,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019419884] [2020-04-17 22:59:51,641 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:51,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:51,773 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:51,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019419884] [2020-04-17 22:59:51,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830540242] [2020-04-17 22:59:51,774 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 22:59:51,825 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 22:59:51,826 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:51,827 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 22:59:51,830 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:00:04,116 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 21 [2020-04-17 23:00:04,117 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:04,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:00:04,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-04-17 23:00:04,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860156113] [2020-04-17 23:00:04,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 23:00:04,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:00:04,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 23:00:04,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=209, Unknown=5, NotChecked=0, Total=306 [2020-04-17 23:00:04,119 INFO L87 Difference]: Start difference. First operand 158 states and 400 transitions. Second operand 18 states. [2020-04-17 23:00:06,470 WARN L192 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 28 [2020-04-17 23:00:08,846 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 25 [2020-04-17 23:00:21,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:00:21,643 INFO L93 Difference]: Finished difference Result 235 states and 554 transitions. [2020-04-17 23:00:21,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 23:00:21,643 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-04-17 23:00:21,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:00:21,644 INFO L225 Difference]: With dead ends: 235 [2020-04-17 23:00:21,644 INFO L226 Difference]: Without dead ends: 233 [2020-04-17 23:00:21,645 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 19.4s TimeCoverageRelationStatistics Valid=237, Invalid=458, Unknown=7, NotChecked=0, Total=702 [2020-04-17 23:00:21,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-04-17 23:00:21,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 162. [2020-04-17 23:00:21,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-04-17 23:00:21,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 411 transitions. [2020-04-17 23:00:21,649 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 411 transitions. Word has length 14 [2020-04-17 23:00:21,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:00:21,649 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 411 transitions. [2020-04-17 23:00:21,649 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 23:00:21,649 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 411 transitions. [2020-04-17 23:00:21,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:00:21,649 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:00:21,650 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:00:21,853 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:21,853 INFO L427 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:00:21,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:00:21,854 INFO L82 PathProgramCache]: Analyzing trace with hash 692730584, now seen corresponding path program 126 times [2020-04-17 23:00:21,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:00:21,854 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212455299] [2020-04-17 23:00:21,854 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:00:21,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:21,954 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:21,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212455299] [2020-04-17 23:00:21,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82272630] [2020-04-17 23:00:21,955 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 23:00:21,996 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 23:00:21,997 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:00:21,998 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:00:21,998 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:00:22,128 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:22,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:00:22,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:00:22,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120033516] [2020-04-17 23:00:22,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:00:22,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:00:22,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:00:22,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:00:22,129 INFO L87 Difference]: Start difference. First operand 162 states and 411 transitions. Second operand 17 states. [2020-04-17 23:00:22,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:00:22,408 INFO L93 Difference]: Finished difference Result 225 states and 531 transitions. [2020-04-17 23:00:22,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 23:00:22,408 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:00:22,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:00:22,409 INFO L225 Difference]: With dead ends: 225 [2020-04-17 23:00:22,409 INFO L226 Difference]: Without dead ends: 223 [2020-04-17 23:00:22,409 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2020-04-17 23:00:22,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-04-17 23:00:22,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 161. [2020-04-17 23:00:22,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-04-17 23:00:22,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 407 transitions. [2020-04-17 23:00:22,413 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 407 transitions. Word has length 14 [2020-04-17 23:00:22,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:00:22,413 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 407 transitions. [2020-04-17 23:00:22,413 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:00:22,413 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 407 transitions. [2020-04-17 23:00:22,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:00:22,414 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:00:22,414 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:00:22,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:22,614 INFO L427 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:00:22,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:00:22,615 INFO L82 PathProgramCache]: Analyzing trace with hash 720435253, now seen corresponding path program 127 times [2020-04-17 23:00:22,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:00:22,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703738639] [2020-04-17 23:00:22,616 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:00:22,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:22,718 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:22,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703738639] [2020-04-17 23:00:22,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130279077] [2020-04-17 23:00:22,719 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 23:00:22,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:22,762 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:00:22,763 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:00:22,899 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:22,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:00:22,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:00:22,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733079767] [2020-04-17 23:00:22,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:00:22,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:00:22,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:00:22,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:00:22,900 INFO L87 Difference]: Start difference. First operand 161 states and 407 transitions. Second operand 17 states. [2020-04-17 23:00:23,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:00:23,151 INFO L93 Difference]: Finished difference Result 214 states and 509 transitions. [2020-04-17 23:00:23,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 23:00:23,154 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:00:23,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:00:23,154 INFO L225 Difference]: With dead ends: 214 [2020-04-17 23:00:23,155 INFO L226 Difference]: Without dead ends: 212 [2020-04-17 23:00:23,155 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2020-04-17 23:00:23,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-04-17 23:00:23,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 160. [2020-04-17 23:00:23,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-04-17 23:00:23,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 404 transitions. [2020-04-17 23:00:23,157 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 404 transitions. Word has length 14 [2020-04-17 23:00:23,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:00:23,157 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 404 transitions. [2020-04-17 23:00:23,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:00:23,157 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 404 transitions. [2020-04-17 23:00:23,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:00:23,158 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:00:23,158 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:00:23,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:23,359 INFO L427 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:00:23,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:00:23,360 INFO L82 PathProgramCache]: Analyzing trace with hash 721388565, now seen corresponding path program 128 times [2020-04-17 23:00:23,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:00:23,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203311584] [2020-04-17 23:00:23,361 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:00:23,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:23,488 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:23,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203311584] [2020-04-17 23:00:23,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947603774] [2020-04-17 23:00:23,488 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 23:00:23,527 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:00:23,528 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:00:23,529 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:00:23,529 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:00:23,670 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:23,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:00:23,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:00:23,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262932900] [2020-04-17 23:00:23,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:00:23,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:00:23,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:00:23,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:00:23,671 INFO L87 Difference]: Start difference. First operand 160 states and 404 transitions. Second operand 17 states. [2020-04-17 23:00:23,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:00:23,873 INFO L93 Difference]: Finished difference Result 203 states and 486 transitions. [2020-04-17 23:00:23,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 23:00:23,873 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:00:23,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:00:23,874 INFO L225 Difference]: With dead ends: 203 [2020-04-17 23:00:23,874 INFO L226 Difference]: Without dead ends: 201 [2020-04-17 23:00:23,875 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2020-04-17 23:00:23,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-04-17 23:00:23,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 158. [2020-04-17 23:00:23,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-04-17 23:00:23,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 397 transitions. [2020-04-17 23:00:23,877 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 397 transitions. Word has length 14 [2020-04-17 23:00:23,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:00:23,878 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 397 transitions. [2020-04-17 23:00:23,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:00:23,878 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 397 transitions. [2020-04-17 23:00:23,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:00:23,878 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:00:23,878 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:00:24,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:24,079 INFO L427 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:00:24,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:00:24,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1998481017, now seen corresponding path program 129 times [2020-04-17 23:00:24,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:00:24,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312966786] [2020-04-17 23:00:24,080 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:00:24,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:24,202 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:24,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312966786] [2020-04-17 23:00:24,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418674928] [2020-04-17 23:00:24,202 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 23:00:24,243 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 23:00:24,243 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:00:24,244 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:00:24,244 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:00:24,391 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:24,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:00:24,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:00:24,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492592446] [2020-04-17 23:00:24,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:00:24,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:00:24,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:00:24,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:00:24,393 INFO L87 Difference]: Start difference. First operand 158 states and 397 transitions. Second operand 17 states. [2020-04-17 23:00:24,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:00:24,467 INFO L93 Difference]: Finished difference Result 212 states and 504 transitions. [2020-04-17 23:00:24,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 23:00:24,468 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:00:24,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:00:24,468 INFO L225 Difference]: With dead ends: 212 [2020-04-17 23:00:24,469 INFO L226 Difference]: Without dead ends: 210 [2020-04-17 23:00:24,469 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-04-17 23:00:24,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-04-17 23:00:24,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 166. [2020-04-17 23:00:24,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-04-17 23:00:24,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 421 transitions. [2020-04-17 23:00:24,473 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 421 transitions. Word has length 14 [2020-04-17 23:00:24,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:00:24,473 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 421 transitions. [2020-04-17 23:00:24,473 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:00:24,473 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 421 transitions. [2020-04-17 23:00:24,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:00:24,474 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:00:24,474 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:00:24,674 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:24,674 INFO L427 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:00:24,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:00:24,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1998480056, now seen corresponding path program 130 times [2020-04-17 23:00:24,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:00:24,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530371566] [2020-04-17 23:00:24,676 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:00:24,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:24,794 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:24,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530371566] [2020-04-17 23:00:24,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489768802] [2020-04-17 23:00:24,795 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 23:00:24,836 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:00:24,837 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:00:24,837 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:00:24,838 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:00:24,988 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:24,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:00:24,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:00:24,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043266204] [2020-04-17 23:00:24,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:00:24,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:00:24,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:00:24,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:00:24,989 INFO L87 Difference]: Start difference. First operand 166 states and 421 transitions. Second operand 17 states. [2020-04-17 23:00:25,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:00:25,200 INFO L93 Difference]: Finished difference Result 217 states and 513 transitions. [2020-04-17 23:00:25,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 23:00:25,201 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:00:25,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:00:25,202 INFO L225 Difference]: With dead ends: 217 [2020-04-17 23:00:25,202 INFO L226 Difference]: Without dead ends: 215 [2020-04-17 23:00:25,202 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-04-17 23:00:25,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-04-17 23:00:25,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 164. [2020-04-17 23:00:25,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-04-17 23:00:25,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 415 transitions. [2020-04-17 23:00:25,206 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 415 transitions. Word has length 14 [2020-04-17 23:00:25,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:00:25,206 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 415 transitions. [2020-04-17 23:00:25,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:00:25,207 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 415 transitions. [2020-04-17 23:00:25,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:00:25,207 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:00:25,207 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:00:25,410 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:25,411 INFO L427 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:00:25,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:00:25,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1998451226, now seen corresponding path program 131 times [2020-04-17 23:00:25,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:00:25,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867187288] [2020-04-17 23:00:25,412 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:00:25,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:25,548 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:25,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867187288] [2020-04-17 23:00:25,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9811853] [2020-04-17 23:00:25,549 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 23:00:25,620 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 23:00:25,620 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:00:25,621 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:00:25,622 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:00:26,918 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:26,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:00:26,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:00:26,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532051163] [2020-04-17 23:00:26,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:00:26,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:00:26,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:00:26,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:00:26,920 INFO L87 Difference]: Start difference. First operand 164 states and 415 transitions. Second operand 17 states. [2020-04-17 23:00:27,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:00:27,223 INFO L93 Difference]: Finished difference Result 227 states and 533 transitions. [2020-04-17 23:00:27,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 23:00:27,224 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:00:27,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:00:27,224 INFO L225 Difference]: With dead ends: 227 [2020-04-17 23:00:27,225 INFO L226 Difference]: Without dead ends: 225 [2020-04-17 23:00:27,225 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-04-17 23:00:27,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-04-17 23:00:27,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 162. [2020-04-17 23:00:27,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-04-17 23:00:27,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 409 transitions. [2020-04-17 23:00:27,229 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 409 transitions. Word has length 14 [2020-04-17 23:00:27,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:00:27,229 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 409 transitions. [2020-04-17 23:00:27,229 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:00:27,229 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 409 transitions. [2020-04-17 23:00:27,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:00:27,230 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:00:27,230 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:00:27,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:27,433 INFO L427 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:00:27,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:00:27,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1997557496, now seen corresponding path program 132 times [2020-04-17 23:00:27,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:00:27,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519741178] [2020-04-17 23:00:27,434 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:00:27,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:27,533 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:27,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519741178] [2020-04-17 23:00:27,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272353745] [2020-04-17 23:00:27,534 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 23:00:27,577 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 23:00:27,577 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:00:27,578 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:00:27,578 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:00:29,729 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:29,729 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:00:29,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:00:29,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662815575] [2020-04-17 23:00:29,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:00:29,730 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:00:29,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:00:29,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:00:29,730 INFO L87 Difference]: Start difference. First operand 162 states and 409 transitions. Second operand 17 states. [2020-04-17 23:00:30,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:00:30,104 INFO L93 Difference]: Finished difference Result 227 states and 533 transitions. [2020-04-17 23:00:30,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 23:00:30,104 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:00:30,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:00:30,105 INFO L225 Difference]: With dead ends: 227 [2020-04-17 23:00:30,105 INFO L226 Difference]: Without dead ends: 225 [2020-04-17 23:00:30,105 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=208, Invalid=442, Unknown=0, NotChecked=0, Total=650 [2020-04-17 23:00:30,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-04-17 23:00:30,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 164. [2020-04-17 23:00:30,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-04-17 23:00:30,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 415 transitions. [2020-04-17 23:00:30,108 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 415 transitions. Word has length 14 [2020-04-17 23:00:30,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:00:30,109 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 415 transitions. [2020-04-17 23:00:30,109 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:00:30,109 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 415 transitions. [2020-04-17 23:00:30,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:00:30,109 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:00:30,109 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:00:30,311 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:30,312 INFO L427 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:00:30,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:00:30,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1997556535, now seen corresponding path program 133 times [2020-04-17 23:00:30,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:00:30,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120405233] [2020-04-17 23:00:30,314 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:00:30,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:30,403 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:30,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120405233] [2020-04-17 23:00:30,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493158073] [2020-04-17 23:00:30,404 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 23:00:30,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:30,444 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:00:30,445 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:00:30,605 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:30,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:00:30,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:00:30,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772248762] [2020-04-17 23:00:30,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:00:30,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:00:30,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:00:30,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:00:30,606 INFO L87 Difference]: Start difference. First operand 164 states and 415 transitions. Second operand 17 states. [2020-04-17 23:00:30,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:00:30,952 INFO L93 Difference]: Finished difference Result 237 states and 553 transitions. [2020-04-17 23:00:30,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 23:00:30,953 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:00:30,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:00:30,954 INFO L225 Difference]: With dead ends: 237 [2020-04-17 23:00:30,954 INFO L226 Difference]: Without dead ends: 235 [2020-04-17 23:00:30,954 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=207, Invalid=443, Unknown=0, NotChecked=0, Total=650 [2020-04-17 23:00:30,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-04-17 23:00:30,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 163. [2020-04-17 23:00:30,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-04-17 23:00:30,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-04-17 23:00:30,958 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-04-17 23:00:30,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:00:30,958 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-04-17 23:00:30,958 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:00:30,958 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-04-17 23:00:30,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:00:30,958 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:00:30,958 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:00:31,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:31,159 INFO L427 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:00:31,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:00:31,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1997527705, now seen corresponding path program 134 times [2020-04-17 23:00:31,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:00:31,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192864384] [2020-04-17 23:00:31,160 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:00:31,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:31,253 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:31,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192864384] [2020-04-17 23:00:31,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762273526] [2020-04-17 23:00:31,253 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 23:00:31,295 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:00:31,296 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:00:31,296 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:00:31,297 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:00:37,538 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:37,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:00:37,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:00:37,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116759687] [2020-04-17 23:00:37,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:00:37,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:00:37,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:00:37,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:00:37,540 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-04-17 23:00:37,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:00:37,893 INFO L93 Difference]: Finished difference Result 229 states and 539 transitions. [2020-04-17 23:00:37,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 23:00:37,893 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:00:37,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:00:37,894 INFO L225 Difference]: With dead ends: 229 [2020-04-17 23:00:37,894 INFO L226 Difference]: Without dead ends: 227 [2020-04-17 23:00:37,894 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2020-04-17 23:00:37,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-04-17 23:00:37,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 160. [2020-04-17 23:00:37,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-04-17 23:00:37,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 403 transitions. [2020-04-17 23:00:37,898 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 403 transitions. Word has length 14 [2020-04-17 23:00:37,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:00:37,899 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 403 transitions. [2020-04-17 23:00:37,899 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:00:37,899 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 403 transitions. [2020-04-17 23:00:37,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:00:37,899 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:00:37,899 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:00:38,100 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:38,100 INFO L427 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:00:38,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:00:38,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1969851866, now seen corresponding path program 135 times [2020-04-17 23:00:38,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:00:38,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100412871] [2020-04-17 23:00:38,101 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:00:38,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:38,184 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:38,184 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100412871] [2020-04-17 23:00:38,184 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289193616] [2020-04-17 23:00:38,185 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 23:00:38,230 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 23:00:38,231 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:00:38,231 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:00:38,232 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:00:38,372 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:38,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:00:38,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:00:38,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555323482] [2020-04-17 23:00:38,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:00:38,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:00:38,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:00:38,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:00:38,374 INFO L87 Difference]: Start difference. First operand 160 states and 403 transitions. Second operand 17 states. [2020-04-17 23:00:38,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:00:38,748 INFO L93 Difference]: Finished difference Result 225 states and 529 transitions. [2020-04-17 23:00:38,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 23:00:38,748 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:00:38,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:00:38,749 INFO L225 Difference]: With dead ends: 225 [2020-04-17 23:00:38,749 INFO L226 Difference]: Without dead ends: 223 [2020-04-17 23:00:38,749 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2020-04-17 23:00:38,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-04-17 23:00:38,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 163. [2020-04-17 23:00:38,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-04-17 23:00:38,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-04-17 23:00:38,753 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-04-17 23:00:38,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:00:38,753 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-04-17 23:00:38,753 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:00:38,753 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-04-17 23:00:38,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:00:38,753 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:00:38,754 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:00:38,954 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:38,954 INFO L427 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:00:38,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:00:38,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1969850905, now seen corresponding path program 136 times [2020-04-17 23:00:38,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:00:38,955 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208853301] [2020-04-17 23:00:38,956 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:00:38,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:39,040 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:39,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208853301] [2020-04-17 23:00:39,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702329457] [2020-04-17 23:00:39,040 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 23:00:39,082 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:00:39,082 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:00:39,083 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:00:39,083 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:00:39,964 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:39,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:00:39,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:00:39,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728611902] [2020-04-17 23:00:39,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:00:39,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:00:39,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:00:39,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:00:39,965 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-04-17 23:00:40,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:00:40,353 INFO L93 Difference]: Finished difference Result 239 states and 557 transitions. [2020-04-17 23:00:40,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 23:00:40,353 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:00:40,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:00:40,354 INFO L225 Difference]: With dead ends: 239 [2020-04-17 23:00:40,354 INFO L226 Difference]: Without dead ends: 237 [2020-04-17 23:00:40,355 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=248, Invalid=564, Unknown=0, NotChecked=0, Total=812 [2020-04-17 23:00:40,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-04-17 23:00:40,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 163. [2020-04-17 23:00:40,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-04-17 23:00:40,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-04-17 23:00:40,358 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-04-17 23:00:40,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:00:40,359 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-04-17 23:00:40,359 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:00:40,359 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-04-17 23:00:40,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:00:40,359 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:00:40,359 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:00:40,560 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:40,561 INFO L427 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:00:40,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:00:40,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1969822075, now seen corresponding path program 137 times [2020-04-17 23:00:40,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:00:40,562 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097097214] [2020-04-17 23:00:40,562 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:00:40,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:40,679 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:40,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097097214] [2020-04-17 23:00:40,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585470962] [2020-04-17 23:00:40,680 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 23:00:40,749 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 23:00:40,750 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:00:40,751 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:00:40,752 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:00:40,951 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:40,952 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:00:40,952 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:00:40,952 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986441278] [2020-04-17 23:00:40,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:00:40,953 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:00:40,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:00:40,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:00:40,954 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-04-17 23:00:41,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:00:41,382 INFO L93 Difference]: Finished difference Result 234 states and 550 transitions. [2020-04-17 23:00:41,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 23:00:41,383 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:00:41,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:00:41,384 INFO L225 Difference]: With dead ends: 234 [2020-04-17 23:00:41,384 INFO L226 Difference]: Without dead ends: 232 [2020-04-17 23:00:41,385 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2020-04-17 23:00:41,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-04-17 23:00:41,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 163. [2020-04-17 23:00:41,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-04-17 23:00:41,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-04-17 23:00:41,390 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-04-17 23:00:41,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:00:41,390 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-04-17 23:00:41,390 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:00:41,391 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-04-17 23:00:41,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:00:41,391 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:00:41,392 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:00:41,596 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:41,596 INFO L427 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:00:41,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:00:41,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1968897593, now seen corresponding path program 138 times [2020-04-17 23:00:41,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:00:41,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556696098] [2020-04-17 23:00:41,597 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:00:41,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:41,682 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:41,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556696098] [2020-04-17 23:00:41,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923987805] [2020-04-17 23:00:41,683 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 23:00:41,721 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 23:00:41,721 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:00:41,722 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:00:41,722 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:00:41,863 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:41,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:00:41,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:00:41,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924988934] [2020-04-17 23:00:41,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:00:41,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:00:41,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:00:41,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:00:41,864 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-04-17 23:00:42,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:00:42,130 INFO L93 Difference]: Finished difference Result 218 states and 515 transitions. [2020-04-17 23:00:42,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 23:00:42,130 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:00:42,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:00:42,131 INFO L225 Difference]: With dead ends: 218 [2020-04-17 23:00:42,131 INFO L226 Difference]: Without dead ends: 216 [2020-04-17 23:00:42,131 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-04-17 23:00:42,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-04-17 23:00:42,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 159. [2020-04-17 23:00:42,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-04-17 23:00:42,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 399 transitions. [2020-04-17 23:00:42,135 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 399 transitions. Word has length 14 [2020-04-17 23:00:42,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:00:42,135 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 399 transitions. [2020-04-17 23:00:42,135 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:00:42,135 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 399 transitions. [2020-04-17 23:00:42,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:00:42,135 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:00:42,135 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:00:42,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:42,336 INFO L427 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:00:42,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:00:42,337 INFO L82 PathProgramCache]: Analyzing trace with hash 575763989, now seen corresponding path program 139 times [2020-04-17 23:00:42,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:00:42,337 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144687623] [2020-04-17 23:00:42,337 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:00:42,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:42,451 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:42,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144687623] [2020-04-17 23:00:42,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910499001] [2020-04-17 23:00:42,452 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 23:00:42,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:42,493 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:00:42,494 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:00:42,616 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:42,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:00:42,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:00:42,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30588403] [2020-04-17 23:00:42,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:00:42,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:00:42,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:00:42,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:00:42,618 INFO L87 Difference]: Start difference. First operand 159 states and 399 transitions. Second operand 17 states. [2020-04-17 23:00:42,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:00:42,715 INFO L93 Difference]: Finished difference Result 208 states and 495 transitions. [2020-04-17 23:00:42,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 23:00:42,715 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:00:42,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:00:42,716 INFO L225 Difference]: With dead ends: 208 [2020-04-17 23:00:42,716 INFO L226 Difference]: Without dead ends: 206 [2020-04-17 23:00:42,717 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-04-17 23:00:42,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-04-17 23:00:42,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 165. [2020-04-17 23:00:42,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-04-17 23:00:42,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 417 transitions. [2020-04-17 23:00:42,720 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 417 transitions. Word has length 14 [2020-04-17 23:00:42,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:00:42,720 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 417 transitions. [2020-04-17 23:00:42,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:00:42,720 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 417 transitions. [2020-04-17 23:00:42,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:00:42,721 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:00:42,721 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:00:42,921 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:42,922 INFO L427 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:00:42,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:00:42,922 INFO L82 PathProgramCache]: Analyzing trace with hash 575764950, now seen corresponding path program 140 times [2020-04-17 23:00:42,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:00:42,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563949840] [2020-04-17 23:00:42,923 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:00:42,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:43,025 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:43,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563949840] [2020-04-17 23:00:43,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617996737] [2020-04-17 23:00:43,026 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 23:00:43,072 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:00:43,072 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:00:43,073 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:00:43,073 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:00:43,200 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:43,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:00:43,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:00:43,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19890214] [2020-04-17 23:00:43,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:00:43,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:00:43,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:00:43,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:00:43,202 INFO L87 Difference]: Start difference. First operand 165 states and 417 transitions. Second operand 17 states. [2020-04-17 23:00:43,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:00:43,442 INFO L93 Difference]: Finished difference Result 229 states and 536 transitions. [2020-04-17 23:00:43,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 23:00:43,442 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:00:43,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:00:43,443 INFO L225 Difference]: With dead ends: 229 [2020-04-17 23:00:43,443 INFO L226 Difference]: Without dead ends: 227 [2020-04-17 23:00:43,444 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=382, Unknown=0, NotChecked=0, Total=552 [2020-04-17 23:00:43,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-04-17 23:00:43,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 163. [2020-04-17 23:00:43,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-04-17 23:00:43,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 411 transitions. [2020-04-17 23:00:43,447 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 411 transitions. Word has length 14 [2020-04-17 23:00:43,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:00:43,448 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 411 transitions. [2020-04-17 23:00:43,448 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:00:43,448 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 411 transitions. [2020-04-17 23:00:43,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:00:43,448 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:00:43,448 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:00:43,648 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:43,649 INFO L427 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:00:43,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:00:43,649 INFO L82 PathProgramCache]: Analyzing trace with hash 575793780, now seen corresponding path program 141 times [2020-04-17 23:00:43,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:00:43,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982529445] [2020-04-17 23:00:43,650 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:00:43,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:43,785 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:43,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982529445] [2020-04-17 23:00:43,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380990216] [2020-04-17 23:00:43,785 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 23:00:43,851 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 23:00:43,851 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:00:43,852 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:00:43,853 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:00:48,943 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:48,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:00:48,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:00:48,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107775525] [2020-04-17 23:00:48,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:00:48,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:00:48,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:00:48,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:00:48,944 INFO L87 Difference]: Start difference. First operand 163 states and 411 transitions. Second operand 17 states. [2020-04-17 23:00:50,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:00:50,012 INFO L93 Difference]: Finished difference Result 235 states and 548 transitions. [2020-04-17 23:00:50,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 23:00:50,013 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:00:50,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:00:50,013 INFO L225 Difference]: With dead ends: 235 [2020-04-17 23:00:50,013 INFO L226 Difference]: Without dead ends: 233 [2020-04-17 23:00:50,014 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=188, Invalid=411, Unknown=1, NotChecked=0, Total=600 [2020-04-17 23:00:50,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-04-17 23:00:50,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 161. [2020-04-17 23:00:50,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-04-17 23:00:50,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 405 transitions. [2020-04-17 23:00:50,017 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 405 transitions. Word has length 14 [2020-04-17 23:00:50,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:00:50,017 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 405 transitions. [2020-04-17 23:00:50,017 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:00:50,017 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 405 transitions. [2020-04-17 23:00:50,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:00:50,018 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:00:50,018 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:00:50,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:50,219 INFO L427 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:00:50,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:00:50,219 INFO L82 PathProgramCache]: Analyzing trace with hash 576687510, now seen corresponding path program 142 times [2020-04-17 23:00:50,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:00:50,220 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759955352] [2020-04-17 23:00:50,220 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:00:50,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:50,304 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:50,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759955352] [2020-04-17 23:00:50,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249543008] [2020-04-17 23:00:50,304 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 23:00:50,345 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:00:50,346 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:00:50,347 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:00:50,347 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:00:51,233 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:51,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:00:51,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-04-17 23:00:51,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753624930] [2020-04-17 23:00:51,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 23:00:51,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:00:51,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 23:00:51,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=232, Unknown=1, NotChecked=0, Total=306 [2020-04-17 23:00:51,235 INFO L87 Difference]: Start difference. First operand 161 states and 405 transitions. Second operand 18 states. [2020-04-17 23:00:52,076 WARN L192 SmtUtils]: Spent 605.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-04-17 23:00:54,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:00:54,762 INFO L93 Difference]: Finished difference Result 241 states and 560 transitions. [2020-04-17 23:00:54,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 23:00:54,762 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-04-17 23:00:54,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:00:54,763 INFO L225 Difference]: With dead ends: 241 [2020-04-17 23:00:54,763 INFO L226 Difference]: Without dead ends: 239 [2020-04-17 23:00:54,764 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=234, Invalid=521, Unknown=1, NotChecked=0, Total=756 [2020-04-17 23:00:54,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-04-17 23:00:54,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 163. [2020-04-17 23:00:54,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-04-17 23:00:54,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 411 transitions. [2020-04-17 23:00:54,768 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 411 transitions. Word has length 14 [2020-04-17 23:00:54,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:00:54,768 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 411 transitions. [2020-04-17 23:00:54,768 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 23:00:54,768 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 411 transitions. [2020-04-17 23:00:54,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:00:54,769 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:00:54,769 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:00:54,972 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:54,972 INFO L427 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:00:54,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:00:54,973 INFO L82 PathProgramCache]: Analyzing trace with hash 576688471, now seen corresponding path program 143 times [2020-04-17 23:00:54,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:00:54,973 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074651470] [2020-04-17 23:00:54,973 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:00:54,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:55,069 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:55,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074651470] [2020-04-17 23:00:55,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439104331] [2020-04-17 23:00:55,069 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 23:00:55,112 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:00:55,112 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:00:55,113 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:00:55,114 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:00:55,275 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:55,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:00:55,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:00:55,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979738405] [2020-04-17 23:00:55,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:00:55,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:00:55,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:00:55,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:00:55,277 INFO L87 Difference]: Start difference. First operand 163 states and 411 transitions. Second operand 17 states. [2020-04-17 23:00:55,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:00:55,668 INFO L93 Difference]: Finished difference Result 241 states and 560 transitions. [2020-04-17 23:00:55,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 23:00:55,668 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:00:55,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:00:55,669 INFO L225 Difference]: With dead ends: 241 [2020-04-17 23:00:55,669 INFO L226 Difference]: Without dead ends: 239 [2020-04-17 23:00:55,670 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=213, Invalid=489, Unknown=0, NotChecked=0, Total=702 [2020-04-17 23:00:55,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-04-17 23:00:55,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 163. [2020-04-17 23:00:55,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-04-17 23:00:55,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 410 transitions. [2020-04-17 23:00:55,673 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 410 transitions. Word has length 14 [2020-04-17 23:00:55,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:00:55,673 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 410 transitions. [2020-04-17 23:00:55,673 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:00:55,673 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 410 transitions. [2020-04-17 23:00:55,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:00:55,674 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:00:55,674 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:00:55,874 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:55,875 INFO L427 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:00:55,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:00:55,875 INFO L82 PathProgramCache]: Analyzing trace with hash 576717301, now seen corresponding path program 144 times [2020-04-17 23:00:55,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:00:55,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468811869] [2020-04-17 23:00:55,876 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:00:55,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:55,959 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:55,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468811869] [2020-04-17 23:00:55,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162303712] [2020-04-17 23:00:55,960 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 23:00:56,003 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 23:00:56,003 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:00:56,004 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:00:56,004 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:00:56,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:56,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:00:56,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:00:56,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739208251] [2020-04-17 23:00:56,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:00:56,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:00:56,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:00:56,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:00:56,166 INFO L87 Difference]: Start difference. First operand 163 states and 410 transitions. Second operand 17 states. [2020-04-17 23:00:56,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:00:56,548 INFO L93 Difference]: Finished difference Result 233 states and 548 transitions. [2020-04-17 23:00:56,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 23:00:56,548 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:00:56,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:00:56,549 INFO L225 Difference]: With dead ends: 233 [2020-04-17 23:00:56,549 INFO L226 Difference]: Without dead ends: 231 [2020-04-17 23:00:56,549 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2020-04-17 23:00:56,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-04-17 23:00:56,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 160. [2020-04-17 23:00:56,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-04-17 23:00:56,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 401 transitions. [2020-04-17 23:00:56,553 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 401 transitions. Word has length 14 [2020-04-17 23:00:56,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:00:56,553 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 401 transitions. [2020-04-17 23:00:56,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:00:56,553 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 401 transitions. [2020-04-17 23:00:56,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:00:56,554 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:00:56,554 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:00:56,754 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:56,755 INFO L427 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:00:56,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:00:56,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1212993479, now seen corresponding path program 145 times [2020-04-17 23:00:56,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:00:56,755 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351947916] [2020-04-17 23:00:56,756 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:00:56,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:56,870 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:56,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351947916] [2020-04-17 23:00:56,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351792019] [2020-04-17 23:00:56,871 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 23:00:56,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:56,912 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:00:56,912 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:00:57,037 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:57,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:00:57,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:00:57,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276272627] [2020-04-17 23:00:57,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:00:57,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:00:57,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:00:57,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:00:57,038 INFO L87 Difference]: Start difference. First operand 160 states and 401 transitions. Second operand 17 states. [2020-04-17 23:00:57,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:00:57,159 INFO L93 Difference]: Finished difference Result 204 states and 486 transitions. [2020-04-17 23:00:57,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 23:00:57,159 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:00:57,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:00:57,160 INFO L225 Difference]: With dead ends: 204 [2020-04-17 23:00:57,160 INFO L226 Difference]: Without dead ends: 202 [2020-04-17 23:00:57,160 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2020-04-17 23:00:57,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-04-17 23:00:57,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 164. [2020-04-17 23:00:57,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-04-17 23:00:57,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 413 transitions. [2020-04-17 23:00:57,164 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 413 transitions. Word has length 14 [2020-04-17 23:00:57,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:00:57,164 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 413 transitions. [2020-04-17 23:00:57,164 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:00:57,164 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 413 transitions. [2020-04-17 23:00:57,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:00:57,164 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:00:57,164 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:00:57,365 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:57,365 INFO L427 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:00:57,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:00:57,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1212994440, now seen corresponding path program 146 times [2020-04-17 23:00:57,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:00:57,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941908181] [2020-04-17 23:00:57,366 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:00:57,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:57,465 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:57,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941908181] [2020-04-17 23:00:57,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173776082] [2020-04-17 23:00:57,466 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 23:00:57,507 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:00:57,507 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:00:57,508 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:00:57,508 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:00:57,633 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:57,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:00:57,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:00:57,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936041775] [2020-04-17 23:00:57,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:00:57,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:00:57,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:00:57,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:00:57,634 INFO L87 Difference]: Start difference. First operand 164 states and 413 transitions. Second operand 17 states. [2020-04-17 23:00:57,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:00:57,896 INFO L93 Difference]: Finished difference Result 225 states and 527 transitions. [2020-04-17 23:00:57,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 23:00:57,896 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:00:57,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:00:57,897 INFO L225 Difference]: With dead ends: 225 [2020-04-17 23:00:57,897 INFO L226 Difference]: Without dead ends: 223 [2020-04-17 23:00:57,898 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2020-04-17 23:00:57,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-04-17 23:00:57,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 162. [2020-04-17 23:00:57,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-04-17 23:00:57,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 407 transitions. [2020-04-17 23:00:57,900 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 407 transitions. Word has length 14 [2020-04-17 23:00:57,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:00:57,900 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 407 transitions. [2020-04-17 23:00:57,901 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:00:57,901 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 407 transitions. [2020-04-17 23:00:57,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:00:57,901 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:00:57,901 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:00:58,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:58,102 INFO L427 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:00:58,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:00:58,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1213023270, now seen corresponding path program 147 times [2020-04-17 23:00:58,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:00:58,103 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888952693] [2020-04-17 23:00:58,103 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:00:58,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:58,198 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:58,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888952693] [2020-04-17 23:00:58,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276556110] [2020-04-17 23:00:58,199 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 23:00:58,242 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 23:00:58,242 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:00:58,243 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:00:58,243 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:00:59,011 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:59,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:00:59,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:00:59,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175798868] [2020-04-17 23:00:59,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:00:59,012 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:00:59,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:00:59,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:00:59,013 INFO L87 Difference]: Start difference. First operand 162 states and 407 transitions. Second operand 17 states. [2020-04-17 23:00:59,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:00:59,348 INFO L93 Difference]: Finished difference Result 231 states and 539 transitions. [2020-04-17 23:00:59,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 23:00:59,348 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:00:59,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:00:59,349 INFO L225 Difference]: With dead ends: 231 [2020-04-17 23:00:59,349 INFO L226 Difference]: Without dead ends: 229 [2020-04-17 23:00:59,349 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=200, Invalid=450, Unknown=0, NotChecked=0, Total=650 [2020-04-17 23:00:59,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-04-17 23:00:59,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 161. [2020-04-17 23:00:59,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-04-17 23:00:59,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 403 transitions. [2020-04-17 23:00:59,353 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 403 transitions. Word has length 14 [2020-04-17 23:00:59,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:00:59,353 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 403 transitions. [2020-04-17 23:00:59,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:00:59,354 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 403 transitions. [2020-04-17 23:00:59,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:00:59,354 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:00:59,354 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:00:59,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:59,555 INFO L427 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:00:59,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:00:59,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1233549269, now seen corresponding path program 148 times [2020-04-17 23:00:59,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:00:59,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410961287] [2020-04-17 23:00:59,556 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:00:59,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:59,647 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:59,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410961287] [2020-04-17 23:00:59,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679869065] [2020-04-17 23:00:59,648 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 23:00:59,695 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:00:59,695 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:00:59,695 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:00:59,696 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:00:59,821 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:59,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:00:59,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:00:59,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557380717] [2020-04-17 23:00:59,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:00:59,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:00:59,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:00:59,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:00:59,822 INFO L87 Difference]: Start difference. First operand 161 states and 403 transitions. Second operand 17 states. [2020-04-17 23:00:59,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:00:59,981 INFO L93 Difference]: Finished difference Result 200 states and 477 transitions. [2020-04-17 23:00:59,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 23:00:59,981 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:00:59,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:00:59,982 INFO L225 Difference]: With dead ends: 200 [2020-04-17 23:00:59,982 INFO L226 Difference]: Without dead ends: 198 [2020-04-17 23:00:59,982 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-04-17 23:00:59,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-04-17 23:00:59,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 163. [2020-04-17 23:00:59,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-04-17 23:00:59,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 409 transitions. [2020-04-17 23:00:59,986 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 409 transitions. Word has length 14 [2020-04-17 23:00:59,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:00:59,986 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 409 transitions. [2020-04-17 23:00:59,986 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:00:59,986 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 409 transitions. [2020-04-17 23:00:59,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:00:59,987 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:00:59,987 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:00,189 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:00,190 INFO L427 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:00,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:00,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1233550230, now seen corresponding path program 149 times [2020-04-17 23:01:00,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:00,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585762848] [2020-04-17 23:01:00,191 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:00,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:00,281 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:00,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585762848] [2020-04-17 23:01:00,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135968854] [2020-04-17 23:01:00,282 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 23:01:00,326 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 23:01:00,326 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:01:00,327 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:01:00,328 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:01:00,469 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:00,470 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:01:00,470 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:01:00,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736423921] [2020-04-17 23:01:00,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:01:00,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:00,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:01:00,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:01:00,470 INFO L87 Difference]: Start difference. First operand 163 states and 409 transitions. Second operand 17 states. [2020-04-17 23:01:00,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:00,784 INFO L93 Difference]: Finished difference Result 221 states and 518 transitions. [2020-04-17 23:01:00,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 23:01:00,784 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:01:00,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:00,785 INFO L225 Difference]: With dead ends: 221 [2020-04-17 23:01:00,785 INFO L226 Difference]: Without dead ends: 219 [2020-04-17 23:01:00,786 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=204, Invalid=446, Unknown=0, NotChecked=0, Total=650 [2020-04-17 23:01:00,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-04-17 23:01:00,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 162. [2020-04-17 23:01:00,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-04-17 23:01:00,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 405 transitions. [2020-04-17 23:01:00,789 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 405 transitions. Word has length 14 [2020-04-17 23:01:00,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:00,789 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 405 transitions. [2020-04-17 23:01:00,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:01:00,789 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 405 transitions. [2020-04-17 23:01:00,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:01:00,790 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:00,790 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:00,993 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:00,993 INFO L427 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:00,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:00,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1234212359, now seen corresponding path program 150 times [2020-04-17 23:01:00,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:00,994 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396713662] [2020-04-17 23:01:00,994 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:00,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:01,081 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:01,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396713662] [2020-04-17 23:01:01,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542639403] [2020-04-17 23:01:01,082 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 23:01:01,123 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 23:01:01,124 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:01:01,124 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 23:01:01,125 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:01:01,161 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:01,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:01:01,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-04-17 23:01:01,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631577602] [2020-04-17 23:01:01,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 23:01:01,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:01,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 23:01:01,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-04-17 23:01:01,163 INFO L87 Difference]: Start difference. First operand 162 states and 405 transitions. Second operand 11 states. [2020-04-17 23:01:01,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:01,325 INFO L93 Difference]: Finished difference Result 201 states and 476 transitions. [2020-04-17 23:01:01,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 23:01:01,325 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-04-17 23:01:01,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:01,326 INFO L225 Difference]: With dead ends: 201 [2020-04-17 23:01:01,326 INFO L226 Difference]: Without dead ends: 199 [2020-04-17 23:01:01,326 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2020-04-17 23:01:01,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-04-17 23:01:01,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 166. [2020-04-17 23:01:01,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-04-17 23:01:01,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-04-17 23:01:01,329 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-04-17 23:01:01,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:01,329 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-04-17 23:01:01,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 23:01:01,329 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-04-17 23:01:01,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:01:01,330 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:01,330 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:01,533 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:01,534 INFO L427 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:01,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:01,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1234234679, now seen corresponding path program 151 times [2020-04-17 23:01:01,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:01,535 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856816286] [2020-04-17 23:01:01,535 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:01,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:01,617 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:01,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856816286] [2020-04-17 23:01:01,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280008447] [2020-04-17 23:01:01,618 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 23:01:01,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:01,661 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:01:01,661 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:01:01,768 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:01:01,783 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:01,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:01:01,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:01:01,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879895974] [2020-04-17 23:01:01,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:01:01,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:01,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:01:01,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:01:01,784 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 17 states. [2020-04-17 23:01:02,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:02,161 INFO L93 Difference]: Finished difference Result 226 states and 539 transitions. [2020-04-17 23:01:02,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 23:01:02,161 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:01:02,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:02,162 INFO L225 Difference]: With dead ends: 226 [2020-04-17 23:01:02,162 INFO L226 Difference]: Without dead ends: 221 [2020-04-17 23:01:02,163 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-04-17 23:01:02,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-04-17 23:01:02,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 164. [2020-04-17 23:01:02,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-04-17 23:01:02,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 404 transitions. [2020-04-17 23:01:02,166 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 404 transitions. Word has length 14 [2020-04-17 23:01:02,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:02,166 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 404 transitions. [2020-04-17 23:01:02,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:01:02,166 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 404 transitions. [2020-04-17 23:01:02,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:01:02,166 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:02,167 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:02,367 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:02,367 INFO L427 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:02,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:02,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1234242150, now seen corresponding path program 152 times [2020-04-17 23:01:02,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:02,368 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828677412] [2020-04-17 23:01:02,369 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:02,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:02,448 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:02,448 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828677412] [2020-04-17 23:01:02,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899056484] [2020-04-17 23:01:02,449 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 23:01:02,489 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:01:02,489 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:01:02,490 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:01:02,490 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:01:02,623 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:02,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:01:02,623 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:01:02,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068720893] [2020-04-17 23:01:02,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:01:02,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:02,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:01:02,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:01:02,624 INFO L87 Difference]: Start difference. First operand 164 states and 404 transitions. Second operand 17 states. [2020-04-17 23:01:02,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:02,937 INFO L93 Difference]: Finished difference Result 218 states and 517 transitions. [2020-04-17 23:01:02,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 23:01:02,938 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:01:02,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:02,938 INFO L225 Difference]: With dead ends: 218 [2020-04-17 23:01:02,938 INFO L226 Difference]: Without dead ends: 216 [2020-04-17 23:01:02,939 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=217, Invalid=485, Unknown=0, NotChecked=0, Total=702 [2020-04-17 23:01:02,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-04-17 23:01:02,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 166. [2020-04-17 23:01:02,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-04-17 23:01:02,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-04-17 23:01:02,942 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-04-17 23:01:02,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:02,943 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-04-17 23:01:02,943 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:01:02,943 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-04-17 23:01:02,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:01:02,943 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:02,943 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:03,144 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:03,144 INFO L427 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:03,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:03,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1234263509, now seen corresponding path program 153 times [2020-04-17 23:01:03,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:03,145 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387666108] [2020-04-17 23:01:03,146 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:03,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:03,221 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:03,222 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387666108] [2020-04-17 23:01:03,222 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177975390] [2020-04-17 23:01:03,222 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 23:01:03,261 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 23:01:03,262 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:01:03,262 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:01:03,263 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:01:03,526 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:01:03,539 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:03,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:01:03,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:01:03,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855391612] [2020-04-17 23:01:03,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:01:03,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:03,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:01:03,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:01:03,540 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 17 states. [2020-04-17 23:01:04,185 WARN L192 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2020-04-17 23:01:04,630 WARN L192 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2020-04-17 23:01:04,859 WARN L192 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2020-04-17 23:01:05,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:05,178 INFO L93 Difference]: Finished difference Result 248 states and 590 transitions. [2020-04-17 23:01:05,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 23:01:05,179 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:01:05,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:05,180 INFO L225 Difference]: With dead ends: 248 [2020-04-17 23:01:05,180 INFO L226 Difference]: Without dead ends: 243 [2020-04-17 23:01:05,180 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-04-17 23:01:05,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-04-17 23:01:05,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 166. [2020-04-17 23:01:05,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-04-17 23:01:05,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-04-17 23:01:05,184 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-04-17 23:01:05,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:05,184 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-04-17 23:01:05,185 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:01:05,185 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-04-17 23:01:05,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:01:05,185 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:05,185 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:05,387 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:05,387 INFO L427 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:05,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:05,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1234264470, now seen corresponding path program 154 times [2020-04-17 23:01:05,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:05,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548308914] [2020-04-17 23:01:05,388 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:05,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:05,460 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:05,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548308914] [2020-04-17 23:01:05,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460760869] [2020-04-17 23:01:05,460 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 23:01:05,498 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:01:05,499 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:01:05,500 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:01:05,500 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:01:05,604 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:01:06,122 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:06,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:01:06,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-04-17 23:01:06,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248789195] [2020-04-17 23:01:06,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 23:01:06,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:06,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 23:01:06,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=221, Unknown=1, NotChecked=0, Total=306 [2020-04-17 23:01:06,123 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 18 states. [2020-04-17 23:01:06,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:06,557 INFO L93 Difference]: Finished difference Result 238 states and 567 transitions. [2020-04-17 23:01:06,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 23:01:06,558 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-04-17 23:01:06,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:06,558 INFO L225 Difference]: With dead ends: 238 [2020-04-17 23:01:06,558 INFO L226 Difference]: Without dead ends: 233 [2020-04-17 23:01:06,559 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=274, Invalid=595, Unknown=1, NotChecked=0, Total=870 [2020-04-17 23:01:06,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-04-17 23:01:06,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 162. [2020-04-17 23:01:06,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-04-17 23:01:06,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 397 transitions. [2020-04-17 23:01:06,562 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 397 transitions. Word has length 14 [2020-04-17 23:01:06,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:06,562 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 397 transitions. [2020-04-17 23:01:06,563 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 23:01:06,563 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 397 transitions. [2020-04-17 23:01:06,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:01:06,563 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:06,563 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:06,763 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:06,764 INFO L427 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:06,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:06,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1234472790, now seen corresponding path program 155 times [2020-04-17 23:01:06,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:06,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757729252] [2020-04-17 23:01:06,765 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:06,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:06,863 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:06,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757729252] [2020-04-17 23:01:06,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231861863] [2020-04-17 23:01:06,864 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 23:01:06,906 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 23:01:06,907 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:01:06,907 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:01:06,908 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:01:07,812 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:07,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:01:07,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:01:07,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151423157] [2020-04-17 23:01:07,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:01:07,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:07,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:01:07,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:01:07,814 INFO L87 Difference]: Start difference. First operand 162 states and 397 transitions. Second operand 17 states. [2020-04-17 23:01:08,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:08,642 INFO L93 Difference]: Finished difference Result 235 states and 547 transitions. [2020-04-17 23:01:08,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 23:01:08,642 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:01:08,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:08,643 INFO L225 Difference]: With dead ends: 235 [2020-04-17 23:01:08,643 INFO L226 Difference]: Without dead ends: 233 [2020-04-17 23:01:08,644 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=201, Invalid=500, Unknown=1, NotChecked=0, Total=702 [2020-04-17 23:01:08,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-04-17 23:01:08,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 164. [2020-04-17 23:01:08,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-04-17 23:01:08,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 404 transitions. [2020-04-17 23:01:08,648 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 404 transitions. Word has length 14 [2020-04-17 23:01:08,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:08,648 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 404 transitions. [2020-04-17 23:01:08,649 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:01:08,649 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 404 transitions. [2020-04-17 23:01:08,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:01:08,649 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:08,649 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:08,852 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:08,853 INFO L427 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:08,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:08,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1235135880, now seen corresponding path program 156 times [2020-04-17 23:01:08,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:08,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556029783] [2020-04-17 23:01:08,853 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:08,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:08,922 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:08,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556029783] [2020-04-17 23:01:08,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321823723] [2020-04-17 23:01:08,923 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 23:01:08,965 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 23:01:08,965 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:01:08,966 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:01:08,966 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:01:10,660 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2020-04-17 23:01:12,907 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:12,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:01:12,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:01:12,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063042723] [2020-04-17 23:01:12,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:01:12,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:12,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:01:12,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=191, Unknown=3, NotChecked=0, Total=272 [2020-04-17 23:01:12,909 INFO L87 Difference]: Start difference. First operand 164 states and 404 transitions. Second operand 17 states. [2020-04-17 23:01:13,447 WARN L192 SmtUtils]: Spent 410.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-04-17 23:01:13,666 WARN L192 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2020-04-17 23:01:14,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:14,395 INFO L93 Difference]: Finished difference Result 252 states and 594 transitions. [2020-04-17 23:01:14,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 23:01:14,395 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:01:14,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:14,396 INFO L225 Difference]: With dead ends: 252 [2020-04-17 23:01:14,396 INFO L226 Difference]: Without dead ends: 250 [2020-04-17 23:01:14,396 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=272, Invalid=595, Unknown=3, NotChecked=0, Total=870 [2020-04-17 23:01:14,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-04-17 23:01:14,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 166. [2020-04-17 23:01:14,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-04-17 23:01:14,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-04-17 23:01:14,400 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-04-17 23:01:14,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:14,400 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-04-17 23:01:14,400 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:01:14,400 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-04-17 23:01:14,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:01:14,401 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:14,401 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:14,601 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:14,602 INFO L427 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:14,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:14,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1235157239, now seen corresponding path program 157 times [2020-04-17 23:01:14,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:14,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487566156] [2020-04-17 23:01:14,603 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:14,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:14,675 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:14,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487566156] [2020-04-17 23:01:14,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980434088] [2020-04-17 23:01:14,676 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 23:01:14,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:14,716 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:01:14,720 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:01:15,707 WARN L192 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-04-17 23:01:16,304 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:01:16,318 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:16,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:01:16,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:01:16,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945356107] [2020-04-17 23:01:16,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:01:16,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:16,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:01:16,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=180, Unknown=1, NotChecked=0, Total=272 [2020-04-17 23:01:16,319 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 17 states. [2020-04-17 23:01:17,031 WARN L192 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2020-04-17 23:01:18,548 WARN L192 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2020-04-17 23:01:20,910 WARN L192 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2020-04-17 23:01:22,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:22,089 INFO L93 Difference]: Finished difference Result 258 states and 617 transitions. [2020-04-17 23:01:22,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 23:01:22,089 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:01:22,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:22,090 INFO L225 Difference]: With dead ends: 258 [2020-04-17 23:01:22,090 INFO L226 Difference]: Without dead ends: 253 [2020-04-17 23:01:22,091 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=371, Invalid=748, Unknown=3, NotChecked=0, Total=1122 [2020-04-17 23:01:22,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-04-17 23:01:22,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 167. [2020-04-17 23:01:22,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-04-17 23:01:22,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-04-17 23:01:22,095 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-04-17 23:01:22,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:22,095 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-04-17 23:01:22,095 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:01:22,095 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-04-17 23:01:22,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:01:22,095 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:22,095 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:22,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:22,299 INFO L427 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:22,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:22,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1235158200, now seen corresponding path program 158 times [2020-04-17 23:01:22,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:22,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884250078] [2020-04-17 23:01:22,300 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:22,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:22,387 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:22,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884250078] [2020-04-17 23:01:22,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164097221] [2020-04-17 23:01:22,388 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 23:01:22,428 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:01:22,428 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:01:22,429 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:01:22,429 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:01:23,705 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:01:24,206 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:24,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:01:24,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-04-17 23:01:24,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646431434] [2020-04-17 23:01:24,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 23:01:24,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:24,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 23:01:24,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=214, Unknown=2, NotChecked=0, Total=306 [2020-04-17 23:01:24,208 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 18 states. [2020-04-17 23:01:24,942 WARN L192 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2020-04-17 23:01:25,471 WARN L192 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 25 [2020-04-17 23:01:27,377 WARN L192 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2020-04-17 23:01:30,279 WARN L192 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2020-04-17 23:01:33,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:33,108 INFO L93 Difference]: Finished difference Result 301 states and 709 transitions. [2020-04-17 23:01:33,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-04-17 23:01:33,108 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-04-17 23:01:33,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:33,109 INFO L225 Difference]: With dead ends: 301 [2020-04-17 23:01:33,109 INFO L226 Difference]: Without dead ends: 294 [2020-04-17 23:01:33,109 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=403, Invalid=926, Unknown=3, NotChecked=0, Total=1332 [2020-04-17 23:01:33,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-04-17 23:01:33,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 167. [2020-04-17 23:01:33,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-04-17 23:01:33,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 418 transitions. [2020-04-17 23:01:33,114 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 418 transitions. Word has length 14 [2020-04-17 23:01:33,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:33,114 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 418 transitions. [2020-04-17 23:01:33,114 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 23:01:33,114 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 418 transitions. [2020-04-17 23:01:33,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:01:33,114 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:33,115 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:33,318 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:33,318 INFO L427 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:33,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:33,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1235187030, now seen corresponding path program 159 times [2020-04-17 23:01:33,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:33,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117728797] [2020-04-17 23:01:33,319 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:33,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:33,399 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:33,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117728797] [2020-04-17 23:01:33,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84404236] [2020-04-17 23:01:33,400 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 23:01:33,441 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 23:01:33,442 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:01:33,442 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:01:33,443 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:01:33,891 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:01:33,908 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:33,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:01:33,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:01:33,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912570218] [2020-04-17 23:01:33,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:01:33,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:33,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:01:33,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:01:33,909 INFO L87 Difference]: Start difference. First operand 167 states and 418 transitions. Second operand 17 states. [2020-04-17 23:01:34,616 WARN L192 SmtUtils]: Spent 512.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2020-04-17 23:01:34,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:34,976 INFO L93 Difference]: Finished difference Result 264 states and 634 transitions. [2020-04-17 23:01:34,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 23:01:34,977 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:01:34,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:34,977 INFO L225 Difference]: With dead ends: 264 [2020-04-17 23:01:34,977 INFO L226 Difference]: Without dead ends: 259 [2020-04-17 23:01:34,978 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=338, Invalid=718, Unknown=0, NotChecked=0, Total=1056 [2020-04-17 23:01:34,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-04-17 23:01:34,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 167. [2020-04-17 23:01:34,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-04-17 23:01:34,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 418 transitions. [2020-04-17 23:01:34,981 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 418 transitions. Word has length 14 [2020-04-17 23:01:34,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:34,982 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 418 transitions. [2020-04-17 23:01:34,982 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:01:34,982 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 418 transitions. [2020-04-17 23:01:34,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:01:34,982 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:34,982 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:35,183 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:35,183 INFO L427 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:35,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:35,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1241622630, now seen corresponding path program 160 times [2020-04-17 23:01:35,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:35,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684834717] [2020-04-17 23:01:35,184 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:35,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:35,259 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:35,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684834717] [2020-04-17 23:01:35,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308065565] [2020-04-17 23:01:35,260 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 23:01:35,301 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:01:35,301 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:01:35,302 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:01:35,302 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:01:42,306 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:42,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:01:42,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:01:42,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58028782] [2020-04-17 23:01:42,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:01:42,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:42,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:01:42,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:01:42,307 INFO L87 Difference]: Start difference. First operand 167 states and 418 transitions. Second operand 17 states. [2020-04-17 23:01:42,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:42,711 INFO L93 Difference]: Finished difference Result 242 states and 571 transitions. [2020-04-17 23:01:42,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 23:01:42,712 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:01:42,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:42,713 INFO L225 Difference]: With dead ends: 242 [2020-04-17 23:01:42,713 INFO L226 Difference]: Without dead ends: 240 [2020-04-17 23:01:42,713 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=193, Invalid=509, Unknown=0, NotChecked=0, Total=702 [2020-04-17 23:01:42,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-04-17 23:01:42,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 170. [2020-04-17 23:01:42,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-04-17 23:01:42,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 429 transitions. [2020-04-17 23:01:42,717 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 429 transitions. Word has length 14 [2020-04-17 23:01:42,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:42,717 INFO L479 AbstractCegarLoop]: Abstraction has 170 states and 429 transitions. [2020-04-17 23:01:42,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:01:42,717 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 429 transitions. [2020-04-17 23:01:42,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:01:42,717 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:42,717 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:42,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:42,918 INFO L427 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:42,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:42,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1241623591, now seen corresponding path program 161 times [2020-04-17 23:01:42,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:42,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828461866] [2020-04-17 23:01:42,919 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:42,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:42,999 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:42,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828461866] [2020-04-17 23:01:42,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405407379] [2020-04-17 23:01:42,999 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 23:01:43,039 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:01:43,039 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:01:43,039 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:01:43,040 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:01:43,208 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:43,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:01:43,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:01:43,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94020055] [2020-04-17 23:01:43,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:01:43,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:43,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:01:43,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:01:43,210 INFO L87 Difference]: Start difference. First operand 170 states and 429 transitions. Second operand 17 states. [2020-04-17 23:01:43,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:43,579 INFO L93 Difference]: Finished difference Result 248 states and 584 transitions. [2020-04-17 23:01:43,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 23:01:43,580 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:01:43,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:43,580 INFO L225 Difference]: With dead ends: 248 [2020-04-17 23:01:43,580 INFO L226 Difference]: Without dead ends: 246 [2020-04-17 23:01:43,581 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2020-04-17 23:01:43,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-04-17 23:01:43,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 170. [2020-04-17 23:01:43,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-04-17 23:01:43,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 428 transitions. [2020-04-17 23:01:43,584 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 428 transitions. Word has length 14 [2020-04-17 23:01:43,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:43,584 INFO L479 AbstractCegarLoop]: Abstraction has 170 states and 428 transitions. [2020-04-17 23:01:43,584 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:01:43,585 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 428 transitions. [2020-04-17 23:01:43,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:01:43,585 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:43,585 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:43,785 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:43,786 INFO L427 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:43,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:43,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1241652421, now seen corresponding path program 162 times [2020-04-17 23:01:43,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:43,787 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196911845] [2020-04-17 23:01:43,787 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:43,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:43,864 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:43,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196911845] [2020-04-17 23:01:43,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833103754] [2020-04-17 23:01:43,865 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 23:01:43,914 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 23:01:43,915 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:01:43,915 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:01:43,916 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:01:44,077 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:44,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:01:44,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:01:44,079 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014710511] [2020-04-17 23:01:44,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:01:44,079 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:44,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:01:44,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:01:44,080 INFO L87 Difference]: Start difference. First operand 170 states and 428 transitions. Second operand 17 states. [2020-04-17 23:01:44,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:44,450 INFO L93 Difference]: Finished difference Result 242 states and 574 transitions. [2020-04-17 23:01:44,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 23:01:44,451 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:01:44,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:44,451 INFO L225 Difference]: With dead ends: 242 [2020-04-17 23:01:44,452 INFO L226 Difference]: Without dead ends: 240 [2020-04-17 23:01:44,452 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=192, Invalid=510, Unknown=0, NotChecked=0, Total=702 [2020-04-17 23:01:44,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-04-17 23:01:44,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 169. [2020-04-17 23:01:44,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-04-17 23:01:44,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2020-04-17 23:01:44,460 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 14 [2020-04-17 23:01:44,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:44,460 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2020-04-17 23:01:44,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:01:44,460 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2020-04-17 23:01:44,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:01:44,460 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:44,460 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:44,661 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:44,661 INFO L427 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:44,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:44,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1262178420, now seen corresponding path program 163 times [2020-04-17 23:01:44,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:44,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068914733] [2020-04-17 23:01:44,663 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:44,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:44,737 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:44,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068914733] [2020-04-17 23:01:44,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17889048] [2020-04-17 23:01:44,738 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 23:01:44,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:44,780 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:01:44,780 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:01:50,790 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:50,790 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:01:50,790 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:01:50,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870280550] [2020-04-17 23:01:50,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:01:50,791 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:50,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:01:50,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:01:50,791 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand 17 states. [2020-04-17 23:01:51,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:51,408 INFO L93 Difference]: Finished difference Result 260 states and 610 transitions. [2020-04-17 23:01:51,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 23:01:51,408 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:01:51,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:51,409 INFO L225 Difference]: With dead ends: 260 [2020-04-17 23:01:51,409 INFO L226 Difference]: Without dead ends: 258 [2020-04-17 23:01:51,410 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=290, Invalid=702, Unknown=0, NotChecked=0, Total=992 [2020-04-17 23:01:51,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-04-17 23:01:51,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 171. [2020-04-17 23:01:51,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-04-17 23:01:51,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 433 transitions. [2020-04-17 23:01:51,412 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 433 transitions. Word has length 14 [2020-04-17 23:01:51,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:51,413 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 433 transitions. [2020-04-17 23:01:51,413 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:01:51,413 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 433 transitions. [2020-04-17 23:01:51,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:01:51,413 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:51,413 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:51,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:51,614 INFO L427 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:51,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:51,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1262179381, now seen corresponding path program 164 times [2020-04-17 23:01:51,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:51,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975533547] [2020-04-17 23:01:51,615 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:51,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:51,688 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:51,689 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975533547] [2020-04-17 23:01:51,689 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945804380] [2020-04-17 23:01:51,689 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 23:01:51,733 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:01:51,734 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:01:51,734 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:01:51,735 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:01:51,905 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:51,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:01:51,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:01:51,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479463253] [2020-04-17 23:01:51,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:01:51,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:51,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:01:51,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:01:51,906 INFO L87 Difference]: Start difference. First operand 171 states and 433 transitions. Second operand 17 states. [2020-04-17 23:01:52,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:52,492 INFO L93 Difference]: Finished difference Result 267 states and 628 transitions. [2020-04-17 23:01:52,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 23:01:52,492 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:01:52,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:52,493 INFO L225 Difference]: With dead ends: 267 [2020-04-17 23:01:52,493 INFO L226 Difference]: Without dead ends: 265 [2020-04-17 23:01:52,493 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=269, Invalid=661, Unknown=0, NotChecked=0, Total=930 [2020-04-17 23:01:52,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-04-17 23:01:52,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 172. [2020-04-17 23:01:52,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-04-17 23:01:52,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 437 transitions. [2020-04-17 23:01:52,497 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 437 transitions. Word has length 14 [2020-04-17 23:01:52,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:52,497 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 437 transitions. [2020-04-17 23:01:52,497 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:01:52,497 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 437 transitions. [2020-04-17 23:01:52,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:01:52,497 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:52,497 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:52,698 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:52,698 INFO L427 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:52,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:52,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1262841510, now seen corresponding path program 165 times [2020-04-17 23:01:52,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:52,699 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889580148] [2020-04-17 23:01:52,699 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:52,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:52,769 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:52,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889580148] [2020-04-17 23:01:52,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745640528] [2020-04-17 23:01:52,770 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 23:01:52,812 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 23:01:52,812 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:01:52,813 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:01:52,813 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:01:54,164 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:54,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:01:54,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-04-17 23:01:54,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523537934] [2020-04-17 23:01:54,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 23:01:54,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:54,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 23:01:54,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=222, Unknown=2, NotChecked=0, Total=306 [2020-04-17 23:01:54,165 INFO L87 Difference]: Start difference. First operand 172 states and 437 transitions. Second operand 18 states. [2020-04-17 23:01:55,130 WARN L192 SmtUtils]: Spent 516.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-04-17 23:01:57,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:57,713 INFO L93 Difference]: Finished difference Result 271 states and 648 transitions. [2020-04-17 23:01:57,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 23:01:57,714 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-04-17 23:01:57,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:57,714 INFO L225 Difference]: With dead ends: 271 [2020-04-17 23:01:57,715 INFO L226 Difference]: Without dead ends: 269 [2020-04-17 23:01:57,715 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=325, Invalid=729, Unknown=2, NotChecked=0, Total=1056 [2020-04-17 23:01:57,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-04-17 23:01:57,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 174. [2020-04-17 23:01:57,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-04-17 23:01:57,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 444 transitions. [2020-04-17 23:01:57,719 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 444 transitions. Word has length 14 [2020-04-17 23:01:57,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:57,719 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 444 transitions. [2020-04-17 23:01:57,719 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 23:01:57,719 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 444 transitions. [2020-04-17 23:01:57,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:01:57,720 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:57,720 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:57,920 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:57,920 INFO L427 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:57,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:57,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1262862869, now seen corresponding path program 166 times [2020-04-17 23:01:57,921 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:57,921 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686077896] [2020-04-17 23:01:57,922 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:57,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:57,993 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:57,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686077896] [2020-04-17 23:01:57,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896709234] [2020-04-17 23:01:57,993 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 23:01:58,031 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:01:58,031 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:01:58,032 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:01:58,033 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:01:58,250 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:01:58,264 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:58,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:01:58,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:01:58,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952120999] [2020-04-17 23:01:58,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:01:58,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:58,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:01:58,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:01:58,266 INFO L87 Difference]: Start difference. First operand 174 states and 444 transitions. Second operand 17 states. [2020-04-17 23:01:59,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:59,170 INFO L93 Difference]: Finished difference Result 262 states and 636 transitions. [2020-04-17 23:01:59,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 23:01:59,171 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:01:59,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:59,172 INFO L225 Difference]: With dead ends: 262 [2020-04-17 23:01:59,172 INFO L226 Difference]: Without dead ends: 257 [2020-04-17 23:01:59,172 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=408, Invalid=852, Unknown=0, NotChecked=0, Total=1260 [2020-04-17 23:01:59,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-04-17 23:01:59,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 174. [2020-04-17 23:01:59,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-04-17 23:01:59,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 444 transitions. [2020-04-17 23:01:59,176 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 444 transitions. Word has length 14 [2020-04-17 23:01:59,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:59,176 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 444 transitions. [2020-04-17 23:01:59,176 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:01:59,177 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 444 transitions. [2020-04-17 23:01:59,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:01:59,177 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:59,177 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:59,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:59,380 INFO L427 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:59,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:59,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1262863830, now seen corresponding path program 167 times [2020-04-17 23:01:59,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:59,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716282558] [2020-04-17 23:01:59,381 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:59,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:59,454 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:59,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716282558] [2020-04-17 23:01:59,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636957130] [2020-04-17 23:01:59,455 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 23:01:59,496 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 23:01:59,497 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:01:59,497 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:01:59,498 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:01:59,678 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:00,245 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:00,245 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:00,245 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-04-17 23:02:00,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895377548] [2020-04-17 23:02:00,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 23:02:00,246 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:00,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 23:02:00,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=216, Unknown=1, NotChecked=0, Total=306 [2020-04-17 23:02:00,246 INFO L87 Difference]: Start difference. First operand 174 states and 444 transitions. Second operand 18 states. [2020-04-17 23:02:04,973 WARN L192 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 Received shutdown request... [2020-04-17 23:02:10,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 23:02:11,108 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:11,109 WARN L544 AbstractCegarLoop]: Verification canceled [2020-04-17 23:02:11,113 WARN L228 ceAbstractionStarter]: Timeout [2020-04-17 23:02:11,113 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.04 11:02:11 BasicIcfg [2020-04-17 23:02:11,113 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-04-17 23:02:11,115 INFO L168 Benchmark]: Toolchain (without parser) took 291561.31 ms. Allocated memory was 138.4 MB in the beginning and 174.6 MB in the end (delta: 36.2 MB). Free memory was 101.9 MB in the beginning and 111.7 MB in the end (delta: -9.8 MB). Peak memory consumption was 26.4 MB. Max. memory is 7.1 GB. [2020-04-17 23:02:11,115 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 138.4 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-04-17 23:02:11,115 INFO L168 Benchmark]: CACSL2BoogieTranslator took 732.54 ms. Allocated memory was 138.4 MB in the beginning and 203.9 MB in the end (delta: 65.5 MB). Free memory was 99.9 MB in the beginning and 160.9 MB in the end (delta: -61.1 MB). Peak memory consumption was 23.8 MB. Max. memory is 7.1 GB. [2020-04-17 23:02:11,116 INFO L168 Benchmark]: Boogie Procedure Inliner took 69.99 ms. Allocated memory is still 203.9 MB. Free memory was 160.9 MB in the beginning and 158.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-04-17 23:02:11,116 INFO L168 Benchmark]: Boogie Preprocessor took 32.74 ms. Allocated memory is still 203.9 MB. Free memory was 158.9 MB in the beginning and 157.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-04-17 23:02:11,116 INFO L168 Benchmark]: RCFGBuilder took 446.51 ms. Allocated memory is still 203.9 MB. Free memory was 157.6 MB in the beginning and 136.9 MB in the end (delta: 20.7 MB). Peak memory consumption was 20.7 MB. Max. memory is 7.1 GB. [2020-04-17 23:02:11,117 INFO L168 Benchmark]: TraceAbstraction took 290258.11 ms. Allocated memory was 203.9 MB in the beginning and 174.6 MB in the end (delta: -29.4 MB). Free memory was 136.9 MB in the beginning and 111.7 MB in the end (delta: 25.2 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-04-17 23:02:11,118 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 138.4 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 732.54 ms. Allocated memory was 138.4 MB in the beginning and 203.9 MB in the end (delta: 65.5 MB). Free memory was 99.9 MB in the beginning and 160.9 MB in the end (delta: -61.1 MB). Peak memory consumption was 23.8 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 69.99 ms. Allocated memory is still 203.9 MB. Free memory was 160.9 MB in the beginning and 158.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 32.74 ms. Allocated memory is still 203.9 MB. Free memory was 158.9 MB in the beginning and 157.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 446.51 ms. Allocated memory is still 203.9 MB. Free memory was 157.6 MB in the beginning and 136.9 MB in the end (delta: 20.7 MB). Peak memory consumption was 20.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 290258.11 ms. Allocated memory was 203.9 MB in the beginning and 174.6 MB in the end (delta: -29.4 MB). Free memory was 136.9 MB in the beginning and 111.7 MB in the end (delta: 25.2 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.3s, 59 ProgramPointsBefore, 20 ProgramPointsAfterwards, 57 TransitionsBefore, 15 TransitionsAfterwards, 1032 CoEnabledTransitionPairs, 6 FixpointIterations, 12 TrivialSequentialCompositions, 26 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 9 ConcurrentYvCompositions, 3 ChoiceCompositions, 576 VarBasedMoverChecksPositive, 14 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 988 CheckedPairsTotal, 47 TotalNumberOfCompositions - TimeoutResultAtElement [Line: 712]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 712). Cancelled while BasicCegarLoop was constructing difference of abstraction (174states) and FLOYD_HOARE automaton (currently 27 states, 18 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 37 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 53 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 290.1s, OverallIterations: 201, TraceHistogramMax: 6, AutomataDifference: 121.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.4s, HoareTripleCheckerStatistics: 2611 SDtfs, 19630 SDslu, 18431 SDs, 0 SdLazy, 12984 SolverSat, 4815 SolverUnsat, 45 SolverUnknown, 0 SolverNotchecked, 51.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5156 GetRequests, 949 SyntacticMatches, 173 SemanticMatches, 4033 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 21255 ImplicationChecksByTransitivity, 174.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=174occurred in iteration=199, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.7s AutomataMinimizationTime, 200 MinimizatonAttempts, 9738 StatesRemovedByMinimization, 200 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.2s SsaConstructionTime, 2.9s SatisfiabilityAnalysisTime, 116.4s InterpolantComputationTime, 4978 NumberOfCodeBlocks, 4978 NumberOfCodeBlocksAsserted, 616 NumberOfCheckSat, 4584 ConstructedInterpolants, 72 QuantifiedInterpolants, 488563 SizeOfPredicates, 193 NumberOfNonLiveVariables, 16872 ConjunctsInSsa, 1908 ConjunctsInUnsatCore, 394 InterpolantComputations, 8 PerfectInterpolantSequences, 0/2026 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown