/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/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA.epf -i ../../../trunk/examples/svcomp/pthread/triangular-longer-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-507b705 [2020-09-11 16:16:05,777 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-11 16:16:05,783 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-11 16:16:05,832 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-11 16:16:05,832 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-11 16:16:05,845 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-11 16:16:05,848 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-11 16:16:05,852 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-11 16:16:05,855 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-11 16:16:05,860 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-11 16:16:05,861 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-11 16:16:05,864 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-11 16:16:05,864 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-11 16:16:05,868 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-11 16:16:05,871 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-11 16:16:05,873 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-11 16:16:05,875 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-11 16:16:05,877 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-11 16:16:05,878 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-11 16:16:05,890 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-11 16:16:05,893 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-11 16:16:05,894 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-11 16:16:05,896 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-11 16:16:05,897 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-11 16:16:05,901 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-11 16:16:05,902 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-11 16:16:05,902 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-11 16:16:05,906 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-11 16:16:05,906 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-11 16:16:05,909 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-11 16:16:05,909 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-11 16:16:05,910 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-11 16:16:05,912 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-11 16:16:05,913 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-11 16:16:05,914 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-11 16:16:05,914 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-11 16:16:05,916 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-11 16:16:05,916 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-11 16:16:05,917 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-11 16:16:05,918 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-11 16:16:05,920 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-11 16:16:05,921 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA.epf [2020-09-11 16:16:05,974 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-11 16:16:05,975 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-11 16:16:05,977 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-11 16:16:05,978 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-11 16:16:05,978 INFO L138 SettingsManager]: * Use SBE=true [2020-09-11 16:16:05,978 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-11 16:16:05,979 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-11 16:16:05,979 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-11 16:16:05,979 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-11 16:16:05,979 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-11 16:16:05,980 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-11 16:16:05,981 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-11 16:16:05,981 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-11 16:16:05,981 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-11 16:16:05,982 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-11 16:16:05,982 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-11 16:16:05,982 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-11 16:16:05,983 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-11 16:16:05,983 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-11 16:16:05,983 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-11 16:16:05,983 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-11 16:16:05,983 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-11 16:16:05,984 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-11 16:16:05,984 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-09-11 16:16:05,984 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-11 16:16:05,984 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-11 16:16:05,984 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-11 16:16:05,985 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-09-11 16:16:05,985 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-11 16:16:06,418 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-11 16:16:06,440 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-11 16:16:06,446 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-11 16:16:06,448 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-11 16:16:06,449 INFO L275 PluginConnector]: CDTParser initialized [2020-09-11 16:16:06,450 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longer-2.i [2020-09-11 16:16:06,529 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/05d50fe80/782eaccc612a448ea4248c848289476b/FLAGec8112414 [2020-09-11 16:16:07,106 INFO L306 CDTParser]: Found 1 translation units. [2020-09-11 16:16:07,107 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/pthread/triangular-longer-2.i [2020-09-11 16:16:07,122 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/05d50fe80/782eaccc612a448ea4248c848289476b/FLAGec8112414 [2020-09-11 16:16:07,383 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/05d50fe80/782eaccc612a448ea4248c848289476b [2020-09-11 16:16:07,398 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-11 16:16:07,404 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-09-11 16:16:07,406 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-11 16:16:07,406 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-11 16:16:07,410 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-11 16:16:07,411 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 04:16:07" (1/1) ... [2020-09-11 16:16:07,416 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@632f4725 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:16:07, skipping insertion in model container [2020-09-11 16:16:07,416 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 04:16:07" (1/1) ... [2020-09-11 16:16:07,425 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-11 16:16:07,480 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-11 16:16:08,049 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-11 16:16:08,068 INFO L203 MainTranslator]: Completed pre-run [2020-09-11 16:16:08,155 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-11 16:16:08,226 INFO L208 MainTranslator]: Completed translation [2020-09-11 16:16:08,226 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:16:08 WrapperNode [2020-09-11 16:16:08,226 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-11 16:16:08,227 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-09-11 16:16:08,228 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-09-11 16:16:08,228 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-09-11 16:16:08,239 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:16:08" (1/1) ... [2020-09-11 16:16:08,258 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:16:08" (1/1) ... [2020-09-11 16:16:08,285 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-09-11 16:16:08,286 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-11 16:16:08,286 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-11 16:16:08,286 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-11 16:16:08,298 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:16:08" (1/1) ... [2020-09-11 16:16:08,299 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:16:08" (1/1) ... [2020-09-11 16:16:08,304 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:16:08" (1/1) ... [2020-09-11 16:16:08,304 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:16:08" (1/1) ... [2020-09-11 16:16:08,313 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:16:08" (1/1) ... [2020-09-11 16:16:08,319 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:16:08" (1/1) ... [2020-09-11 16:16:08,321 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:16:08" (1/1) ... [2020-09-11 16:16:08,324 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-11 16:16:08,325 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-11 16:16:08,325 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-11 16:16:08,325 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-11 16:16:08,326 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:16:08" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-11 16:16:08,403 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-09-11 16:16:08,403 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-09-11 16:16:08,403 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-09-11 16:16:08,404 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-09-11 16:16:08,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-11 16:16:08,404 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-09-11 16:16:08,404 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-11 16:16:08,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-11 16:16:08,405 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-09-11 16:16:08,405 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-11 16:16:08,405 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-11 16:16:08,407 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-09-11 16:16:08,794 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-11 16:16:08,795 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-09-11 16:16:08,800 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 04:16:08 BoogieIcfgContainer [2020-09-11 16:16:08,800 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-11 16:16:08,802 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-11 16:16:08,802 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-11 16:16:08,806 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-11 16:16:08,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.09 04:16:07" (1/3) ... [2020-09-11 16:16:08,807 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43dd9fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 04:16:08, skipping insertion in model container [2020-09-11 16:16:08,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:16:08" (2/3) ... [2020-09-11 16:16:08,808 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43dd9fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 04:16:08, skipping insertion in model container [2020-09-11 16:16:08,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 04:16:08" (3/3) ... [2020-09-11 16:16:08,810 INFO L109 eAbstractionObserver]: Analyzing ICFG triangular-longer-2.i [2020-09-11 16:16:08,821 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-09-11 16:16:08,822 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-11 16:16:08,832 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-11 16:16:08,833 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-09-11 16:16:08,862 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:08,862 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:08,863 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:08,863 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:08,863 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:08,864 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:08,864 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:08,864 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:08,865 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:08,865 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:08,865 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:08,865 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:08,866 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:08,866 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:08,867 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:08,867 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:08,867 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:08,868 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:08,868 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:08,868 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:08,869 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:08,869 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:08,869 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:08,870 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:08,870 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:08,870 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:08,870 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:08,871 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:08,875 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:08,875 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:08,876 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:08,876 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:08,876 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:08,876 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:08,891 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:08,891 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:08,891 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:08,892 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:08,892 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:08,892 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:08,914 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-09-11 16:16:08,937 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-11 16:16:08,938 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-11 16:16:08,938 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-11 16:16:08,938 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-11 16:16:08,938 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-11 16:16:08,938 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-11 16:16:08,939 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-11 16:16:08,939 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-11 16:16:08,956 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 120 flow [2020-09-11 16:16:08,959 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-09-11 16:16:09,004 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-09-11 16:16:09,005 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-11 16:16:09,012 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-09-11 16:16:09,015 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-09-11 16:16:09,033 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-09-11 16:16:09,034 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-11 16:16:09,035 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-09-11 16:16:09,038 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 924 [2020-09-11 16:16:09,041 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-09-11 16:16:10,094 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-09-11 16:16:10,318 INFO L206 etLargeBlockEncoding]: Checked pairs total: 851 [2020-09-11 16:16:10,319 INFO L214 etLargeBlockEncoding]: Total number of compositions: 42 [2020-09-11 16:16:10,323 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-09-11 16:16:10,337 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-09-11 16:16:10,340 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-09-11 16:16:10,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-09-11 16:16:10,347 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:10,348 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-09-11 16:16:10,348 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:10,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:10,355 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times [2020-09-11 16:16:10,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:10,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870508076] [2020-09-11 16:16:10,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:10,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:10,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:10,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870508076] [2020-09-11 16:16:10,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 16:16:10,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-11 16:16:10,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774398218] [2020-09-11 16:16:10,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-11 16:16:10,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:10,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-11 16:16:10,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-11 16:16:10,708 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-09-11 16:16:10,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:10,807 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-09-11 16:16:10,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-11 16:16:10,809 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-09-11 16:16:10,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:10,825 INFO L225 Difference]: With dead ends: 75 [2020-09-11 16:16:10,825 INFO L226 Difference]: Without dead ends: 42 [2020-09-11 16:16:10,827 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-11 16:16:10,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-11 16:16:10,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-09-11 16:16:10,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-11 16:16:10,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-09-11 16:16:10,873 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-09-11 16:16:10,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:10,874 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-09-11 16:16:10,874 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-11 16:16:10,874 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-09-11 16:16:10,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-11 16:16:10,875 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:10,875 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:10,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-11 16:16:10,876 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:10,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:10,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1777031324, now seen corresponding path program 1 times [2020-09-11 16:16:10,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:10,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239251127] [2020-09-11 16:16:10,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:10,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:10,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:10,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239251127] [2020-09-11 16:16:10,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 16:16:10,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-11 16:16:10,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505426549] [2020-09-11 16:16:10,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-11 16:16:10,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:10,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-11 16:16:10,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-11 16:16:10,991 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-09-11 16:16:11,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:11,030 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-09-11 16:16:11,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-11 16:16:11,030 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-09-11 16:16:11,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:11,032 INFO L225 Difference]: With dead ends: 56 [2020-09-11 16:16:11,032 INFO L226 Difference]: Without dead ends: 50 [2020-09-11 16:16:11,033 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-09-11 16:16:11,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-11 16:16:11,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-09-11 16:16:11,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-11 16:16:11,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-09-11 16:16:11,041 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-09-11 16:16:11,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:11,043 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-09-11 16:16:11,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-11 16:16:11,043 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-09-11 16:16:11,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-11 16:16:11,044 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:11,044 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:11,045 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-11 16:16:11,045 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:11,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:11,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1669374595, now seen corresponding path program 1 times [2020-09-11 16:16:11,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:11,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543708164] [2020-09-11 16:16:11,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:11,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:11,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:11,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543708164] [2020-09-11 16:16:11,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 16:16:11,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-11 16:16:11,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689836666] [2020-09-11 16:16:11,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-11 16:16:11,145 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:11,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-11 16:16:11,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-11 16:16:11,147 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-09-11 16:16:11,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:11,243 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2020-09-11 16:16:11,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-11 16:16:11,244 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-11 16:16:11,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:11,246 INFO L225 Difference]: With dead ends: 78 [2020-09-11 16:16:11,246 INFO L226 Difference]: Without dead ends: 71 [2020-09-11 16:16:11,246 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-09-11 16:16:11,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-11 16:16:11,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 46. [2020-09-11 16:16:11,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-11 16:16:11,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-09-11 16:16:11,256 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 10 [2020-09-11 16:16:11,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:11,256 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-09-11 16:16:11,256 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-11 16:16:11,256 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-09-11 16:16:11,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-11 16:16:11,258 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:11,258 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:11,259 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-11 16:16:11,259 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:11,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:11,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1669391335, now seen corresponding path program 2 times [2020-09-11 16:16:11,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:11,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690367314] [2020-09-11 16:16:11,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:11,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:11,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:11,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690367314] [2020-09-11 16:16:11,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 16:16:11,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-11 16:16:11,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222910843] [2020-09-11 16:16:11,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-11 16:16:11,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:11,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-11 16:16:11,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-11 16:16:11,354 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 6 states. [2020-09-11 16:16:11,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:11,450 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-09-11 16:16:11,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-11 16:16:11,452 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-11 16:16:11,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:11,453 INFO L225 Difference]: With dead ends: 54 [2020-09-11 16:16:11,453 INFO L226 Difference]: Without dead ends: 43 [2020-09-11 16:16:11,454 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-09-11 16:16:11,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-11 16:16:11,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-09-11 16:16:11,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-11 16:16:11,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 80 transitions. [2020-09-11 16:16:11,465 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 80 transitions. Word has length 10 [2020-09-11 16:16:11,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:11,466 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 80 transitions. [2020-09-11 16:16:11,466 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-11 16:16:11,466 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 80 transitions. [2020-09-11 16:16:11,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-11 16:16:11,467 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:11,467 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:11,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-11 16:16:11,467 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:11,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:11,468 INFO L82 PathProgramCache]: Analyzing trace with hash 447691255, now seen corresponding path program 3 times [2020-09-11 16:16:11,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:11,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425216625] [2020-09-11 16:16:11,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:11,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:11,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:11,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425216625] [2020-09-11 16:16:11,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 16:16:11,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-11 16:16:11,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574751412] [2020-09-11 16:16:11,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-11 16:16:11,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:11,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-11 16:16:11,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-11 16:16:11,547 INFO L87 Difference]: Start difference. First operand 34 states and 80 transitions. Second operand 6 states. [2020-09-11 16:16:11,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:11,645 INFO L93 Difference]: Finished difference Result 57 states and 133 transitions. [2020-09-11 16:16:11,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-11 16:16:11,646 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-11 16:16:11,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:11,647 INFO L225 Difference]: With dead ends: 57 [2020-09-11 16:16:11,647 INFO L226 Difference]: Without dead ends: 51 [2020-09-11 16:16:11,647 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-09-11 16:16:11,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-09-11 16:16:11,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2020-09-11 16:16:11,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-11 16:16:11,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-09-11 16:16:11,653 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 10 [2020-09-11 16:16:11,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:11,654 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-09-11 16:16:11,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-11 16:16:11,654 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-09-11 16:16:11,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 16:16:11,655 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:11,655 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:11,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-11 16:16:11,655 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:11,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:11,656 INFO L82 PathProgramCache]: Analyzing trace with hash 211540140, now seen corresponding path program 4 times [2020-09-11 16:16:11,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:11,656 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378682770] [2020-09-11 16:16:11,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:11,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:11,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:11,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378682770] [2020-09-11 16:16:11,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980972358] [2020-09-11 16:16:11,792 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:11,854 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:16:11,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:11,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-11 16:16:11,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:11,920 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:16:11,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:11,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:11,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-11 16:16:11,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569440493] [2020-09-11 16:16:11,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-11 16:16:11,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:11,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-11 16:16:11,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-09-11 16:16:11,949 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 8 states. [2020-09-11 16:16:12,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:12,062 INFO L93 Difference]: Finished difference Result 48 states and 117 transitions. [2020-09-11 16:16:12,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-11 16:16:12,063 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-11 16:16:12,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:12,064 INFO L225 Difference]: With dead ends: 48 [2020-09-11 16:16:12,064 INFO L226 Difference]: Without dead ends: 43 [2020-09-11 16:16:12,065 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:16:12,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-11 16:16:12,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-09-11 16:16:12,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-11 16:16:12,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions. [2020-09-11 16:16:12,070 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 11 [2020-09-11 16:16:12,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:12,070 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 82 transitions. [2020-09-11 16:16:12,070 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-11 16:16:12,070 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions. [2020-09-11 16:16:12,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 16:16:12,071 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:12,071 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:12,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-09-11 16:16:12,284 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:12,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:12,285 INFO L82 PathProgramCache]: Analyzing trace with hash 976950295, now seen corresponding path program 5 times [2020-09-11 16:16:12,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:12,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894393120] [2020-09-11 16:16:12,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:12,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:12,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:12,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894393120] [2020-09-11 16:16:12,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630110885] [2020-09-11 16:16:12,369 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:12,424 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:16:12,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:12,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-11 16:16:12,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:12,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:12,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:12,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-09-11 16:16:12,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391561471] [2020-09-11 16:16:12,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-11 16:16:12,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:12,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-11 16:16:12,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-11 16:16:12,457 INFO L87 Difference]: Start difference. First operand 34 states and 82 transitions. Second operand 7 states. [2020-09-11 16:16:12,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:12,546 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-09-11 16:16:12,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-11 16:16:12,547 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-09-11 16:16:12,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:12,548 INFO L225 Difference]: With dead ends: 54 [2020-09-11 16:16:12,548 INFO L226 Difference]: Without dead ends: 48 [2020-09-11 16:16:12,549 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-09-11 16:16:12,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-11 16:16:12,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-09-11 16:16:12,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-11 16:16:12,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2020-09-11 16:16:12,563 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 11 [2020-09-11 16:16:12,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:12,564 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2020-09-11 16:16:12,564 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-11 16:16:12,564 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2020-09-11 16:16:12,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 16:16:12,565 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:12,565 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:12,766 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:12,766 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:12,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:12,767 INFO L82 PathProgramCache]: Analyzing trace with hash 993037435, now seen corresponding path program 6 times [2020-09-11 16:16:12,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:12,768 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200742761] [2020-09-11 16:16:12,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:12,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:12,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:12,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200742761] [2020-09-11 16:16:12,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471963308] [2020-09-11 16:16:12,841 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:12,889 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 16:16:12,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:12,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-11 16:16:12,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:12,921 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:12,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:12,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:12,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-11 16:16:12,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250575572] [2020-09-11 16:16:12,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-11 16:16:12,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:12,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-11 16:16:12,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-11 16:16:12,948 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand 8 states. [2020-09-11 16:16:13,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:13,082 INFO L93 Difference]: Finished difference Result 58 states and 133 transitions. [2020-09-11 16:16:13,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-11 16:16:13,083 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-11 16:16:13,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:13,084 INFO L225 Difference]: With dead ends: 58 [2020-09-11 16:16:13,085 INFO L226 Difference]: Without dead ends: 52 [2020-09-11 16:16:13,085 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-09-11 16:16:13,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-09-11 16:16:13,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-09-11 16:16:13,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-11 16:16:13,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-09-11 16:16:13,096 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 11 [2020-09-11 16:16:13,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:13,096 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-09-11 16:16:13,096 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-11 16:16:13,096 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-09-11 16:16:13,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 16:16:13,100 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:13,101 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:13,311 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:13,312 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:13,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:13,312 INFO L82 PathProgramCache]: Analyzing trace with hash 993527545, now seen corresponding path program 7 times [2020-09-11 16:16:13,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:13,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028782404] [2020-09-11 16:16:13,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:13,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:13,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:13,384 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028782404] [2020-09-11 16:16:13,384 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036471192] [2020-09-11 16:16:13,384 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:13,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:13,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-11 16:16:13,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:13,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:13,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:13,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-09-11 16:16:13,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97946412] [2020-09-11 16:16:13,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-11 16:16:13,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:13,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-11 16:16:13,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-11 16:16:13,453 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 7 states. [2020-09-11 16:16:13,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:13,658 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-09-11 16:16:13,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 16:16:13,659 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-09-11 16:16:13,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:13,660 INFO L225 Difference]: With dead ends: 78 [2020-09-11 16:16:13,660 INFO L226 Difference]: Without dead ends: 72 [2020-09-11 16:16:13,661 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:16:13,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-11 16:16:13,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 46. [2020-09-11 16:16:13,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-11 16:16:13,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 117 transitions. [2020-09-11 16:16:13,668 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 117 transitions. Word has length 11 [2020-09-11 16:16:13,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:13,668 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 117 transitions. [2020-09-11 16:16:13,668 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-11 16:16:13,668 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 117 transitions. [2020-09-11 16:16:13,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 16:16:13,669 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:13,670 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:13,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:13,883 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:13,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:13,884 INFO L82 PathProgramCache]: Analyzing trace with hash 993544285, now seen corresponding path program 8 times [2020-09-11 16:16:13,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:13,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904379379] [2020-09-11 16:16:13,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:13,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:13,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:14,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904379379] [2020-09-11 16:16:14,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459305582] [2020-09-11 16:16:14,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:14,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:16:14,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:14,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-11 16:16:14,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:14,097 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:14,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:14,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:14,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-11 16:16:14,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149522425] [2020-09-11 16:16:14,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-11 16:16:14,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:14,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-11 16:16:14,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-11 16:16:14,113 INFO L87 Difference]: Start difference. First operand 46 states and 117 transitions. Second operand 8 states. [2020-09-11 16:16:14,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:14,293 INFO L93 Difference]: Finished difference Result 62 states and 145 transitions. [2020-09-11 16:16:14,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 16:16:14,294 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-11 16:16:14,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:14,295 INFO L225 Difference]: With dead ends: 62 [2020-09-11 16:16:14,295 INFO L226 Difference]: Without dead ends: 54 [2020-09-11 16:16:14,295 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:16:14,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-11 16:16:14,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2020-09-11 16:16:14,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-09-11 16:16:14,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-09-11 16:16:14,305 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-09-11 16:16:14,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:14,305 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-09-11 16:16:14,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-11 16:16:14,305 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-09-11 16:16:14,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:16:14,307 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:14,307 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:14,519 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-09-11 16:16:14,519 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:14,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:14,520 INFO L82 PathProgramCache]: Analyzing trace with hash -2048766974, now seen corresponding path program 9 times [2020-09-11 16:16:14,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:14,520 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211474759] [2020-09-11 16:16:14,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:14,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:14,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:14,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211474759] [2020-09-11 16:16:14,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887713892] [2020-09-11 16:16:14,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:14,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 16:16:14,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:14,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 16:16:14,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:14,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:14,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:14,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-09-11 16:16:14,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061843148] [2020-09-11 16:16:14,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-11 16:16:14,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:14,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-11 16:16:14,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-11 16:16:14,723 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 8 states. [2020-09-11 16:16:14,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:14,825 INFO L93 Difference]: Finished difference Result 64 states and 147 transitions. [2020-09-11 16:16:14,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 16:16:14,825 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-09-11 16:16:14,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:14,826 INFO L225 Difference]: With dead ends: 64 [2020-09-11 16:16:14,827 INFO L226 Difference]: Without dead ends: 58 [2020-09-11 16:16:14,827 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:16:14,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-11 16:16:14,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2020-09-11 16:16:14,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-11 16:16:14,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 109 transitions. [2020-09-11 16:16:14,836 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 109 transitions. Word has length 12 [2020-09-11 16:16:14,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:14,837 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 109 transitions. [2020-09-11 16:16:14,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-11 16:16:14,838 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 109 transitions. [2020-09-11 16:16:14,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:16:14,838 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:14,839 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:15,046 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:15,046 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:15,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:15,047 INFO L82 PathProgramCache]: Analyzing trace with hash -2032679834, now seen corresponding path program 10 times [2020-09-11 16:16:15,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:15,048 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384301348] [2020-09-11 16:16:15,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:15,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:15,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:15,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384301348] [2020-09-11 16:16:15,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174011922] [2020-09-11 16:16:15,128 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:15,177 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:16:15,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:15,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 16:16:15,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:15,198 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:15,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:15,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:15,213 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-11 16:16:15,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021055051] [2020-09-11 16:16:15,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-11 16:16:15,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:15,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-11 16:16:15,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-11 16:16:15,217 INFO L87 Difference]: Start difference. First operand 45 states and 109 transitions. Second operand 9 states. [2020-09-11 16:16:15,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:15,468 INFO L93 Difference]: Finished difference Result 61 states and 141 transitions. [2020-09-11 16:16:15,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 16:16:15,469 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-11 16:16:15,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:15,469 INFO L225 Difference]: With dead ends: 61 [2020-09-11 16:16:15,469 INFO L226 Difference]: Without dead ends: 55 [2020-09-11 16:16:15,470 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-09-11 16:16:15,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-11 16:16:15,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2020-09-11 16:16:15,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-11 16:16:15,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-09-11 16:16:15,473 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 12 [2020-09-11 16:16:15,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:15,473 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-09-11 16:16:15,473 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-11 16:16:15,473 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-09-11 16:16:15,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:16:15,474 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:15,474 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:15,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:15,685 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:15,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:15,686 INFO L82 PathProgramCache]: Analyzing trace with hash -2032189724, now seen corresponding path program 11 times [2020-09-11 16:16:15,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:15,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910500296] [2020-09-11 16:16:15,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:15,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:15,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:15,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910500296] [2020-09-11 16:16:15,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342341275] [2020-09-11 16:16:15,755 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:15,800 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:16:15,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:15,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 16:16:15,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:15,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:15,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:15,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-09-11 16:16:15,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079414089] [2020-09-11 16:16:15,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-11 16:16:15,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:15,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-11 16:16:15,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-11 16:16:15,825 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 8 states. [2020-09-11 16:16:15,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:15,967 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-09-11 16:16:15,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 16:16:15,968 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-09-11 16:16:15,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:15,969 INFO L225 Difference]: With dead ends: 77 [2020-09-11 16:16:15,969 INFO L226 Difference]: Without dead ends: 71 [2020-09-11 16:16:15,969 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:16:15,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-11 16:16:15,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2020-09-11 16:16:15,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-11 16:16:15,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 121 transitions. [2020-09-11 16:16:15,974 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 121 transitions. Word has length 12 [2020-09-11 16:16:15,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:15,974 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 121 transitions. [2020-09-11 16:16:15,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-11 16:16:15,974 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 121 transitions. [2020-09-11 16:16:15,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:16:15,975 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:15,975 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:16,176 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-09-11 16:16:16,176 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:16,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:16,177 INFO L82 PathProgramCache]: Analyzing trace with hash -2032172984, now seen corresponding path program 12 times [2020-09-11 16:16:16,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:16,178 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381638688] [2020-09-11 16:16:16,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:16,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:16,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:16,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381638688] [2020-09-11 16:16:16,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53053240] [2020-09-11 16:16:16,252 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:16,296 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 16:16:16,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:16,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:16:16,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:16,327 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:16,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:16,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-11 16:16:16,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883755753] [2020-09-11 16:16:16,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-11 16:16:16,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:16,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-11 16:16:16,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-11 16:16:16,329 INFO L87 Difference]: Start difference. First operand 48 states and 121 transitions. Second operand 9 states. [2020-09-11 16:16:16,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:16,532 INFO L93 Difference]: Finished difference Result 56 states and 133 transitions. [2020-09-11 16:16:16,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 16:16:16,533 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-11 16:16:16,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:16,535 INFO L225 Difference]: With dead ends: 56 [2020-09-11 16:16:16,535 INFO L226 Difference]: Without dead ends: 48 [2020-09-11 16:16:16,535 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-09-11 16:16:16,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-11 16:16:16,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 37. [2020-09-11 16:16:16,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-11 16:16:16,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 88 transitions. [2020-09-11 16:16:16,540 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 88 transitions. Word has length 12 [2020-09-11 16:16:16,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:16,541 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 88 transitions. [2020-09-11 16:16:16,541 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-11 16:16:16,541 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 88 transitions. [2020-09-11 16:16:16,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:16:16,545 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:16,545 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:16,756 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:16,756 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:16,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:16,757 INFO L82 PathProgramCache]: Analyzing trace with hash 735118070, now seen corresponding path program 13 times [2020-09-11 16:16:16,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:16,758 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879698332] [2020-09-11 16:16:16,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:16,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:16,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:16,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879698332] [2020-09-11 16:16:16,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715855263] [2020-09-11 16:16:16,827 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:16,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:16,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 16:16:16,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:16,916 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:16:16,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:16,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:16,927 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-11 16:16:16,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298429475] [2020-09-11 16:16:16,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-11 16:16:16,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:16,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-11 16:16:16,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-11 16:16:16,929 INFO L87 Difference]: Start difference. First operand 37 states and 88 transitions. Second operand 9 states. [2020-09-11 16:16:17,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:17,165 INFO L93 Difference]: Finished difference Result 60 states and 143 transitions. [2020-09-11 16:16:17,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 16:16:17,165 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-11 16:16:17,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:17,166 INFO L225 Difference]: With dead ends: 60 [2020-09-11 16:16:17,166 INFO L226 Difference]: Without dead ends: 55 [2020-09-11 16:16:17,167 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:16:17,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-11 16:16:17,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2020-09-11 16:16:17,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-11 16:16:17,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-09-11 16:16:17,170 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 12 [2020-09-11 16:16:17,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:17,170 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-09-11 16:16:17,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-11 16:16:17,170 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-09-11 16:16:17,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:16:17,171 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:17,171 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:17,380 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-09-11 16:16:17,381 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:17,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:17,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1427163243, now seen corresponding path program 14 times [2020-09-11 16:16:17,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:17,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638017907] [2020-09-11 16:16:17,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:17,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:17,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:17,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638017907] [2020-09-11 16:16:17,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608077721] [2020-09-11 16:16:17,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:17,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:16:17,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:17,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:16:17,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:17,540 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:16:17,556 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:17,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:17,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-11 16:16:17,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265156142] [2020-09-11 16:16:17,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-11 16:16:17,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:17,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-11 16:16:17,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-09-11 16:16:17,559 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 10 states. [2020-09-11 16:16:17,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:17,792 INFO L93 Difference]: Finished difference Result 54 states and 133 transitions. [2020-09-11 16:16:17,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 16:16:17,792 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-11 16:16:17,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:17,793 INFO L225 Difference]: With dead ends: 54 [2020-09-11 16:16:17,793 INFO L226 Difference]: Without dead ends: 49 [2020-09-11 16:16:17,794 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:16:17,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-11 16:16:17,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-09-11 16:16:17,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-11 16:16:17,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2020-09-11 16:16:17,797 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 13 [2020-09-11 16:16:17,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:17,797 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2020-09-11 16:16:17,797 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-11 16:16:17,797 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2020-09-11 16:16:17,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:16:17,798 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:17,798 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:18,007 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-09-11 16:16:18,008 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:18,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:18,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1748588394, now seen corresponding path program 15 times [2020-09-11 16:16:18,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:18,009 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697707880] [2020-09-11 16:16:18,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:18,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:18,104 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:18,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697707880] [2020-09-11 16:16:18,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040723306] [2020-09-11 16:16:18,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:18,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 16:16:18,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:18,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:16:18,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:18,204 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:18,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:18,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-11 16:16:18,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251476968] [2020-09-11 16:16:18,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-11 16:16:18,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:18,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-11 16:16:18,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-09-11 16:16:18,206 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand 9 states. [2020-09-11 16:16:18,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:18,331 INFO L93 Difference]: Finished difference Result 60 states and 139 transitions. [2020-09-11 16:16:18,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 16:16:18,332 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-09-11 16:16:18,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:18,333 INFO L225 Difference]: With dead ends: 60 [2020-09-11 16:16:18,333 INFO L226 Difference]: Without dead ends: 54 [2020-09-11 16:16:18,333 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-09-11 16:16:18,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-11 16:16:18,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-09-11 16:16:18,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-11 16:16:18,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-09-11 16:16:18,339 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 13 [2020-09-11 16:16:18,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:18,339 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-09-11 16:16:18,340 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-11 16:16:18,340 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-09-11 16:16:18,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:16:18,340 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:18,341 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:18,551 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-09-11 16:16:18,551 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:18,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:18,552 INFO L82 PathProgramCache]: Analyzing trace with hash 826251258, now seen corresponding path program 16 times [2020-09-11 16:16:18,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:18,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002732867] [2020-09-11 16:16:18,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:18,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:18,655 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:18,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002732867] [2020-09-11 16:16:18,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974950316] [2020-09-11 16:16:18,656 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:18,720 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:16:18,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:18,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:16:18,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:18,745 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:18,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:18,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:18,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-11 16:16:18,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836713791] [2020-09-11 16:16:18,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-11 16:16:18,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:18,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-11 16:16:18,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-11 16:16:18,762 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 10 states. [2020-09-11 16:16:18,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:18,922 INFO L93 Difference]: Finished difference Result 66 states and 151 transitions. [2020-09-11 16:16:18,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 16:16:18,923 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-11 16:16:18,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:18,923 INFO L225 Difference]: With dead ends: 66 [2020-09-11 16:16:18,924 INFO L226 Difference]: Without dead ends: 60 [2020-09-11 16:16:18,924 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-09-11 16:16:18,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-11 16:16:18,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 44. [2020-09-11 16:16:18,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-11 16:16:18,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-09-11 16:16:18,926 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 13 [2020-09-11 16:16:18,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:18,927 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-09-11 16:16:18,927 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-11 16:16:18,927 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-09-11 16:16:18,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:16:18,930 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:18,930 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:19,139 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-09-11 16:16:19,139 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:19,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:19,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1297246968, now seen corresponding path program 17 times [2020-09-11 16:16:19,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:19,141 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265466090] [2020-09-11 16:16:19,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:19,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:19,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:19,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265466090] [2020-09-11 16:16:19,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393109580] [2020-09-11 16:16:19,221 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:19,278 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 16:16:19,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:19,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:16:19,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:19,300 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:19,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:19,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-11 16:16:19,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979650388] [2020-09-11 16:16:19,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-11 16:16:19,301 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:19,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-11 16:16:19,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-11 16:16:19,301 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 9 states. [2020-09-11 16:16:19,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:19,489 INFO L93 Difference]: Finished difference Result 67 states and 155 transitions. [2020-09-11 16:16:19,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-11 16:16:19,489 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-09-11 16:16:19,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:19,490 INFO L225 Difference]: With dead ends: 67 [2020-09-11 16:16:19,490 INFO L226 Difference]: Without dead ends: 61 [2020-09-11 16:16:19,491 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:16:19,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-11 16:16:19,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2020-09-11 16:16:19,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-11 16:16:19,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-09-11 16:16:19,494 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 13 [2020-09-11 16:16:19,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:19,494 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-09-11 16:16:19,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-11 16:16:19,494 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-09-11 16:16:19,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:16:19,496 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:19,496 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:19,697 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:19,697 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:19,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:19,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1313334108, now seen corresponding path program 18 times [2020-09-11 16:16:19,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:19,699 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840241568] [2020-09-11 16:16:19,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:19,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:19,794 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:19,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840241568] [2020-09-11 16:16:19,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110491285] [2020-09-11 16:16:19,794 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:19,849 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-11 16:16:19,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:19,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:16:19,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:19,872 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:19,891 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:19,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:19,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-11 16:16:19,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969971511] [2020-09-11 16:16:19,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-11 16:16:19,892 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:19,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-11 16:16:19,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-11 16:16:19,893 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-09-11 16:16:20,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:20,144 INFO L93 Difference]: Finished difference Result 69 states and 159 transitions. [2020-09-11 16:16:20,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 16:16:20,144 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-11 16:16:20,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:20,145 INFO L225 Difference]: With dead ends: 69 [2020-09-11 16:16:20,145 INFO L226 Difference]: Without dead ends: 63 [2020-09-11 16:16:20,146 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:16:20,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-11 16:16:20,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2020-09-11 16:16:20,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-11 16:16:20,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-09-11 16:16:20,149 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 13 [2020-09-11 16:16:20,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:20,149 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-09-11 16:16:20,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-11 16:16:20,149 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-09-11 16:16:20,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:16:20,150 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:20,150 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:20,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:20,358 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:20,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:20,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1313824218, now seen corresponding path program 19 times [2020-09-11 16:16:20,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:20,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176099363] [2020-09-11 16:16:20,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:20,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:20,435 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:20,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176099363] [2020-09-11 16:16:20,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667429491] [2020-09-11 16:16:20,436 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:20,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:20,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:16:20,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:20,531 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:20,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:20,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-11 16:16:20,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309040350] [2020-09-11 16:16:20,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-11 16:16:20,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:20,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-11 16:16:20,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-11 16:16:20,534 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 9 states. [2020-09-11 16:16:20,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:20,781 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-09-11 16:16:20,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 16:16:20,782 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-09-11 16:16:20,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:20,783 INFO L225 Difference]: With dead ends: 88 [2020-09-11 16:16:20,783 INFO L226 Difference]: Without dead ends: 82 [2020-09-11 16:16:20,784 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:16:20,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-11 16:16:20,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 52. [2020-09-11 16:16:20,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-11 16:16:20,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 133 transitions. [2020-09-11 16:16:20,787 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 133 transitions. Word has length 13 [2020-09-11 16:16:20,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:20,788 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 133 transitions. [2020-09-11 16:16:20,788 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-11 16:16:20,788 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 133 transitions. [2020-09-11 16:16:20,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:16:20,788 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:20,789 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:20,992 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:20,992 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:20,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:20,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1313840958, now seen corresponding path program 20 times [2020-09-11 16:16:20,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:20,994 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165674725] [2020-09-11 16:16:20,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:21,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:21,065 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:21,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165674725] [2020-09-11 16:16:21,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582507944] [2020-09-11 16:16:21,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:21,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:16:21,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:21,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:16:21,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:21,141 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:21,150 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:21,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:21,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-11 16:16:21,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113170620] [2020-09-11 16:16:21,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-11 16:16:21,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:21,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-11 16:16:21,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-11 16:16:21,153 INFO L87 Difference]: Start difference. First operand 52 states and 133 transitions. Second operand 10 states. [2020-09-11 16:16:21,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:21,474 INFO L93 Difference]: Finished difference Result 69 states and 163 transitions. [2020-09-11 16:16:21,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 16:16:21,479 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-11 16:16:21,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:21,480 INFO L225 Difference]: With dead ends: 69 [2020-09-11 16:16:21,480 INFO L226 Difference]: Without dead ends: 61 [2020-09-11 16:16:21,480 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:16:21,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-11 16:16:21,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2020-09-11 16:16:21,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-11 16:16:21,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-09-11 16:16:21,483 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-09-11 16:16:21,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:21,483 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-09-11 16:16:21,484 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-11 16:16:21,484 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-09-11 16:16:21,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:16:21,484 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:21,484 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:21,694 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-09-11 16:16:21,694 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:21,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:21,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1770024511, now seen corresponding path program 21 times [2020-09-11 16:16:21,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:21,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668964577] [2020-09-11 16:16:21,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:21,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:21,814 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:21,815 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668964577] [2020-09-11 16:16:21,815 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659930830] [2020-09-11 16:16:21,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:21,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 16:16:21,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:21,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:16:21,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:21,897 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:21,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:21,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-11 16:16:21,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225252375] [2020-09-11 16:16:21,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-11 16:16:21,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:21,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-11 16:16:21,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-11 16:16:21,899 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 10 states. [2020-09-11 16:16:22,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:22,062 INFO L93 Difference]: Finished difference Result 74 states and 171 transitions. [2020-09-11 16:16:22,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 16:16:22,063 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-09-11 16:16:22,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:22,064 INFO L225 Difference]: With dead ends: 74 [2020-09-11 16:16:22,064 INFO L226 Difference]: Without dead ends: 68 [2020-09-11 16:16:22,064 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:16:22,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-11 16:16:22,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 51. [2020-09-11 16:16:22,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-11 16:16:22,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-09-11 16:16:22,067 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-09-11 16:16:22,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:22,069 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-09-11 16:16:22,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-11 16:16:22,069 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-09-11 16:16:22,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:16:22,070 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:22,070 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:22,270 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-09-11 16:16:22,271 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:22,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:22,271 INFO L82 PathProgramCache]: Analyzing trace with hash 804815141, now seen corresponding path program 22 times [2020-09-11 16:16:22,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:22,272 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605670526] [2020-09-11 16:16:22,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:22,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:22,395 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:22,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605670526] [2020-09-11 16:16:22,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97430841] [2020-09-11 16:16:22,396 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:22,442 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:16:22,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:22,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:16:22,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:22,474 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:22,488 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:22,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:22,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-11 16:16:22,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957293209] [2020-09-11 16:16:22,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 16:16:22,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:22,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 16:16:22,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-11 16:16:22,491 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-09-11 16:16:22,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:22,761 INFO L93 Difference]: Finished difference Result 71 states and 165 transitions. [2020-09-11 16:16:22,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 16:16:22,761 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-11 16:16:22,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:22,762 INFO L225 Difference]: With dead ends: 71 [2020-09-11 16:16:22,762 INFO L226 Difference]: Without dead ends: 65 [2020-09-11 16:16:22,763 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:16:22,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-09-11 16:16:22,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2020-09-11 16:16:22,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-11 16:16:22,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-09-11 16:16:22,766 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-09-11 16:16:22,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:22,766 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-09-11 16:16:22,767 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 16:16:22,767 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-09-11 16:16:22,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:16:22,767 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:22,767 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:22,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-09-11 16:16:22,976 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:22,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:22,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1275810851, now seen corresponding path program 23 times [2020-09-11 16:16:22,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:22,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873572634] [2020-09-11 16:16:22,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:22,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:23,061 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:23,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873572634] [2020-09-11 16:16:23,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688895248] [2020-09-11 16:16:23,062 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:23,126 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 16:16:23,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:23,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:16:23,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:23,153 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:23,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:23,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-11 16:16:23,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094516817] [2020-09-11 16:16:23,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-11 16:16:23,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:23,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-11 16:16:23,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-11 16:16:23,158 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-09-11 16:16:23,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:23,400 INFO L93 Difference]: Finished difference Result 68 states and 159 transitions. [2020-09-11 16:16:23,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-11 16:16:23,401 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-09-11 16:16:23,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:23,402 INFO L225 Difference]: With dead ends: 68 [2020-09-11 16:16:23,402 INFO L226 Difference]: Without dead ends: 62 [2020-09-11 16:16:23,403 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:16:23,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-09-11 16:16:23,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2020-09-11 16:16:23,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-11 16:16:23,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-09-11 16:16:23,406 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-09-11 16:16:23,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:23,407 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-09-11 16:16:23,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-11 16:16:23,407 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-09-11 16:16:23,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:16:23,407 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:23,407 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:23,617 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-09-11 16:16:23,617 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:23,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:23,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1291897991, now seen corresponding path program 24 times [2020-09-11 16:16:23,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:23,619 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103507178] [2020-09-11 16:16:23,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:23,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:23,721 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:23,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103507178] [2020-09-11 16:16:23,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824899276] [2020-09-11 16:16:23,722 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:23,774 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-11 16:16:23,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:23,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:16:23,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:23,800 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:23,811 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:23,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:23,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-11 16:16:23,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380192121] [2020-09-11 16:16:23,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 16:16:23,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:23,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 16:16:23,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-09-11 16:16:23,813 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-09-11 16:16:24,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:24,083 INFO L93 Difference]: Finished difference Result 67 states and 157 transitions. [2020-09-11 16:16:24,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 16:16:24,083 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-11 16:16:24,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:24,084 INFO L225 Difference]: With dead ends: 67 [2020-09-11 16:16:24,084 INFO L226 Difference]: Without dead ends: 61 [2020-09-11 16:16:24,085 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:16:24,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-11 16:16:24,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2020-09-11 16:16:24,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-11 16:16:24,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-09-11 16:16:24,088 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-09-11 16:16:24,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:24,088 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-09-11 16:16:24,088 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 16:16:24,088 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-09-11 16:16:24,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:16:24,089 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:24,089 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:24,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-09-11 16:16:24,297 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:24,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:24,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1292388101, now seen corresponding path program 25 times [2020-09-11 16:16:24,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:24,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920046992] [2020-09-11 16:16:24,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:24,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:24,377 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:24,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920046992] [2020-09-11 16:16:24,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604516300] [2020-09-11 16:16:24,378 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:24,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:24,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:16:24,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:24,439 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:24,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:24,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-11 16:16:24,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634805703] [2020-09-11 16:16:24,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-11 16:16:24,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:24,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-11 16:16:24,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-11 16:16:24,441 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-09-11 16:16:24,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:24,724 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-09-11 16:16:24,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 16:16:24,724 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-09-11 16:16:24,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:24,725 INFO L225 Difference]: With dead ends: 83 [2020-09-11 16:16:24,725 INFO L226 Difference]: Without dead ends: 77 [2020-09-11 16:16:24,726 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:16:24,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-11 16:16:24,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2020-09-11 16:16:24,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-11 16:16:24,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 137 transitions. [2020-09-11 16:16:24,730 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 137 transitions. Word has length 14 [2020-09-11 16:16:24,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:24,730 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 137 transitions. [2020-09-11 16:16:24,730 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-11 16:16:24,731 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 137 transitions. [2020-09-11 16:16:24,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:16:24,731 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:24,731 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:24,932 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:24,932 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:24,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:24,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1292404841, now seen corresponding path program 26 times [2020-09-11 16:16:24,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:24,933 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533980314] [2020-09-11 16:16:24,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:24,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:25,017 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:25,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533980314] [2020-09-11 16:16:25,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572320103] [2020-09-11 16:16:25,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:25,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:16:25,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:25,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:16:25,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:25,110 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:25,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:25,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-11 16:16:25,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839137387] [2020-09-11 16:16:25,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 16:16:25,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:25,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 16:16:25,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-09-11 16:16:25,112 INFO L87 Difference]: Start difference. First operand 54 states and 137 transitions. Second operand 11 states. [2020-09-11 16:16:25,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:25,383 INFO L93 Difference]: Finished difference Result 62 states and 149 transitions. [2020-09-11 16:16:25,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 16:16:25,384 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-11 16:16:25,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:25,384 INFO L225 Difference]: With dead ends: 62 [2020-09-11 16:16:25,384 INFO L226 Difference]: Without dead ends: 54 [2020-09-11 16:16:25,385 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:16:25,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-11 16:16:25,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 41. [2020-09-11 16:16:25,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-09-11 16:16:25,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 98 transitions. [2020-09-11 16:16:25,387 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 98 transitions. Word has length 14 [2020-09-11 16:16:25,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:25,387 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 98 transitions. [2020-09-11 16:16:25,388 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 16:16:25,388 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 98 transitions. [2020-09-11 16:16:25,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:16:25,388 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:25,388 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:25,595 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-09-11 16:16:25,595 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:25,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:25,596 INFO L82 PathProgramCache]: Analyzing trace with hash 2074380341, now seen corresponding path program 27 times [2020-09-11 16:16:25,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:25,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175423821] [2020-09-11 16:16:25,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:25,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:25,676 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:25,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175423821] [2020-09-11 16:16:25,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414412450] [2020-09-11 16:16:25,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:25,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 16:16:25,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:25,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:16:25,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:25,770 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:16:25,790 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:25,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:25,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-11 16:16:25,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608850687] [2020-09-11 16:16:25,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 16:16:25,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:25,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 16:16:25,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-09-11 16:16:25,793 INFO L87 Difference]: Start difference. First operand 41 states and 98 transitions. Second operand 11 states. [2020-09-11 16:16:26,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:26,160 INFO L93 Difference]: Finished difference Result 68 states and 163 transitions. [2020-09-11 16:16:26,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 16:16:26,161 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-11 16:16:26,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:26,162 INFO L225 Difference]: With dead ends: 68 [2020-09-11 16:16:26,162 INFO L226 Difference]: Without dead ends: 63 [2020-09-11 16:16:26,162 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2020-09-11 16:16:26,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-11 16:16:26,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2020-09-11 16:16:26,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-11 16:16:26,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-09-11 16:16:26,166 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 14 [2020-09-11 16:16:26,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:26,166 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-09-11 16:16:26,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 16:16:26,166 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-09-11 16:16:26,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 16:16:26,167 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:26,167 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:26,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-09-11 16:16:26,377 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:26,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:26,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1409860714, now seen corresponding path program 28 times [2020-09-11 16:16:26,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:26,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074219558] [2020-09-11 16:16:26,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:26,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:26,484 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:26,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074219558] [2020-09-11 16:16:26,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916468984] [2020-09-11 16:16:26,485 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:26,550 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:16:26,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:26,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:16:26,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:26,576 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:16:26,594 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:26,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:26,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-11 16:16:26,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060770957] [2020-09-11 16:16:26,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 16:16:26,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:26,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 16:16:26,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-11 16:16:26,596 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 12 states. [2020-09-11 16:16:26,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:26,956 INFO L93 Difference]: Finished difference Result 60 states and 149 transitions. [2020-09-11 16:16:26,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 16:16:26,956 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-11 16:16:26,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:26,957 INFO L225 Difference]: With dead ends: 60 [2020-09-11 16:16:26,958 INFO L226 Difference]: Without dead ends: 55 [2020-09-11 16:16:26,958 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2020-09-11 16:16:26,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-11 16:16:26,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2020-09-11 16:16:26,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-11 16:16:26,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-09-11 16:16:26,961 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 15 [2020-09-11 16:16:26,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:26,961 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-09-11 16:16:26,961 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 16:16:26,962 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-09-11 16:16:26,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 16:16:26,962 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:26,962 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:27,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:27,171 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:27,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:27,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1061217963, now seen corresponding path program 29 times [2020-09-11 16:16:27,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:27,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726952203] [2020-09-11 16:16:27,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:27,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:27,289 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:27,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726952203] [2020-09-11 16:16:27,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213857831] [2020-09-11 16:16:27,290 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:27,341 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-11 16:16:27,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:27,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:16:27,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:27,366 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:27,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:27,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-11 16:16:27,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826194857] [2020-09-11 16:16:27,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 16:16:27,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:27,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 16:16:27,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-09-11 16:16:27,368 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 11 states. [2020-09-11 16:16:27,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:27,545 INFO L93 Difference]: Finished difference Result 66 states and 153 transitions. [2020-09-11 16:16:27,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 16:16:27,546 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-11 16:16:27,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:27,546 INFO L225 Difference]: With dead ends: 66 [2020-09-11 16:16:27,547 INFO L226 Difference]: Without dead ends: 60 [2020-09-11 16:16:27,547 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:16:27,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-11 16:16:27,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-09-11 16:16:27,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-11 16:16:27,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-09-11 16:16:27,550 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 15 [2020-09-11 16:16:27,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:27,550 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-09-11 16:16:27,550 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 16:16:27,550 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-09-11 16:16:27,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 16:16:27,551 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:27,551 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:27,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:27,752 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:27,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:27,753 INFO L82 PathProgramCache]: Analyzing trace with hash -541474887, now seen corresponding path program 30 times [2020-09-11 16:16:27,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:27,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687610093] [2020-09-11 16:16:27,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:27,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:27,869 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:27,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687610093] [2020-09-11 16:16:27,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788502558] [2020-09-11 16:16:27,869 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:27,925 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-11 16:16:27,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:27,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:16:27,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:27,944 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:27,957 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:27,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:27,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-11 16:16:27,958 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012181607] [2020-09-11 16:16:27,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 16:16:27,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:27,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 16:16:27,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-09-11 16:16:27,959 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand 12 states. [2020-09-11 16:16:28,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:28,149 INFO L93 Difference]: Finished difference Result 74 states and 169 transitions. [2020-09-11 16:16:28,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 16:16:28,150 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-11 16:16:28,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:28,151 INFO L225 Difference]: With dead ends: 74 [2020-09-11 16:16:28,151 INFO L226 Difference]: Without dead ends: 68 [2020-09-11 16:16:28,151 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:16:28,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-11 16:16:28,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-09-11 16:16:28,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-11 16:16:28,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 117 transitions. [2020-09-11 16:16:28,154 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 117 transitions. Word has length 15 [2020-09-11 16:16:28,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:28,154 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 117 transitions. [2020-09-11 16:16:28,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 16:16:28,154 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 117 transitions. [2020-09-11 16:16:28,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 16:16:28,155 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:28,155 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:28,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-09-11 16:16:28,363 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:28,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:28,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1113836343, now seen corresponding path program 31 times [2020-09-11 16:16:28,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:28,364 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354671819] [2020-09-11 16:16:28,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:28,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:28,497 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:28,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354671819] [2020-09-11 16:16:28,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663043953] [2020-09-11 16:16:28,498 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:28,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:28,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:16:28,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:28,603 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:28,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:28,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-11 16:16:28,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488332425] [2020-09-11 16:16:28,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 16:16:28,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:28,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 16:16:28,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-09-11 16:16:28,606 INFO L87 Difference]: Start difference. First operand 48 states and 117 transitions. Second operand 11 states. [2020-09-11 16:16:28,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:28,864 INFO L93 Difference]: Finished difference Result 75 states and 173 transitions. [2020-09-11 16:16:28,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 16:16:28,865 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-11 16:16:28,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:28,866 INFO L225 Difference]: With dead ends: 75 [2020-09-11 16:16:28,866 INFO L226 Difference]: Without dead ends: 69 [2020-09-11 16:16:28,867 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:16:28,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-11 16:16:28,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2020-09-11 16:16:28,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-11 16:16:28,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-09-11 16:16:28,870 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 15 [2020-09-11 16:16:28,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:28,870 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-09-11 16:16:28,870 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 16:16:28,870 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-09-11 16:16:28,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 16:16:28,871 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:28,871 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:29,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:29,078 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:29,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:29,079 INFO L82 PathProgramCache]: Analyzing trace with hash -606291301, now seen corresponding path program 32 times [2020-09-11 16:16:29,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:29,079 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306294006] [2020-09-11 16:16:29,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:29,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:29,182 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:29,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306294006] [2020-09-11 16:16:29,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568285799] [2020-09-11 16:16:29,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:29,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:16:29,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:29,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:16:29,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:29,253 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:29,264 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:29,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:29,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-11 16:16:29,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548653307] [2020-09-11 16:16:29,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 16:16:29,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:29,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 16:16:29,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-09-11 16:16:29,266 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 12 states. [2020-09-11 16:16:29,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:29,582 INFO L93 Difference]: Finished difference Result 79 states and 181 transitions. [2020-09-11 16:16:29,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 16:16:29,582 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-11 16:16:29,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:29,583 INFO L225 Difference]: With dead ends: 79 [2020-09-11 16:16:29,583 INFO L226 Difference]: Without dead ends: 73 [2020-09-11 16:16:29,584 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-09-11 16:16:29,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-11 16:16:29,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 50. [2020-09-11 16:16:29,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-11 16:16:29,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-09-11 16:16:29,587 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 15 [2020-09-11 16:16:29,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:29,587 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-09-11 16:16:29,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 16:16:29,587 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-09-11 16:16:29,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 16:16:29,588 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:29,588 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:29,797 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-09-11 16:16:29,797 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:29,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:29,798 INFO L82 PathProgramCache]: Analyzing trace with hash -135295591, now seen corresponding path program 33 times [2020-09-11 16:16:29,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:29,798 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128531384] [2020-09-11 16:16:29,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:29,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:29,895 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:29,895 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128531384] [2020-09-11 16:16:29,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230975919] [2020-09-11 16:16:29,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:29,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-11 16:16:29,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:29,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:16:29,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:29,978 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:29,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:29,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-11 16:16:29,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728831604] [2020-09-11 16:16:29,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 16:16:29,981 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:29,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 16:16:29,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-11 16:16:29,981 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 11 states. [2020-09-11 16:16:30,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:30,235 INFO L93 Difference]: Finished difference Result 79 states and 183 transitions. [2020-09-11 16:16:30,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-11 16:16:30,236 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-11 16:16:30,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:30,236 INFO L225 Difference]: With dead ends: 79 [2020-09-11 16:16:30,236 INFO L226 Difference]: Without dead ends: 73 [2020-09-11 16:16:30,237 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2020-09-11 16:16:30,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-11 16:16:30,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2020-09-11 16:16:30,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-11 16:16:30,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 131 transitions. [2020-09-11 16:16:30,240 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 131 transitions. Word has length 15 [2020-09-11 16:16:30,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:30,240 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 131 transitions. [2020-09-11 16:16:30,240 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 16:16:30,240 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 131 transitions. [2020-09-11 16:16:30,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 16:16:30,241 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:30,241 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:30,449 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:30,449 INFO L427 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:30,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:30,450 INFO L82 PathProgramCache]: Analyzing trace with hash -119208451, now seen corresponding path program 34 times [2020-09-11 16:16:30,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:30,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252926756] [2020-09-11 16:16:30,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:30,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:30,579 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:30,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252926756] [2020-09-11 16:16:30,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202541217] [2020-09-11 16:16:30,580 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:30,648 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:16:30,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:30,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:16:30,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:30,681 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:30,698 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:30,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:30,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-11 16:16:30,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086255904] [2020-09-11 16:16:30,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 16:16:30,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:30,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 16:16:30,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-09-11 16:16:30,701 INFO L87 Difference]: Start difference. First operand 53 states and 131 transitions. Second operand 12 states. [2020-09-11 16:16:31,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:31,142 INFO L93 Difference]: Finished difference Result 76 states and 177 transitions. [2020-09-11 16:16:31,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 16:16:31,142 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-11 16:16:31,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:31,143 INFO L225 Difference]: With dead ends: 76 [2020-09-11 16:16:31,143 INFO L226 Difference]: Without dead ends: 70 [2020-09-11 16:16:31,144 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2020-09-11 16:16:31,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-11 16:16:31,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2020-09-11 16:16:31,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-11 16:16:31,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-09-11 16:16:31,147 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 15 [2020-09-11 16:16:31,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:31,147 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-09-11 16:16:31,147 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 16:16:31,147 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-09-11 16:16:31,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 16:16:31,148 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:31,148 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:31,356 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-09-11 16:16:31,356 INFO L427 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:31,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:31,357 INFO L82 PathProgramCache]: Analyzing trace with hash -118718341, now seen corresponding path program 35 times [2020-09-11 16:16:31,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:31,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64766528] [2020-09-11 16:16:31,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:31,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:31,446 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:31,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64766528] [2020-09-11 16:16:31,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121551012] [2020-09-11 16:16:31,447 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:31,506 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-11 16:16:31,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:31,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:16:31,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:31,530 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:31,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:31,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-11 16:16:31,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308232903] [2020-09-11 16:16:31,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 16:16:31,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:31,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 16:16:31,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-09-11 16:16:31,532 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 11 states. [2020-09-11 16:16:31,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:31,868 INFO L93 Difference]: Finished difference Result 96 states and 227 transitions. [2020-09-11 16:16:31,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 16:16:31,868 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-11 16:16:31,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:31,870 INFO L225 Difference]: With dead ends: 96 [2020-09-11 16:16:31,870 INFO L226 Difference]: Without dead ends: 90 [2020-09-11 16:16:31,870 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-09-11 16:16:31,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-11 16:16:31,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 58. [2020-09-11 16:16:31,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-11 16:16:31,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 149 transitions. [2020-09-11 16:16:31,873 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 149 transitions. Word has length 15 [2020-09-11 16:16:31,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:31,874 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 149 transitions. [2020-09-11 16:16:31,874 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 16:16:31,874 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 149 transitions. [2020-09-11 16:16:31,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 16:16:31,875 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:31,875 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:32,075 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-09-11 16:16:32,075 INFO L427 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:32,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:32,077 INFO L82 PathProgramCache]: Analyzing trace with hash -118701601, now seen corresponding path program 36 times [2020-09-11 16:16:32,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:32,077 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724235755] [2020-09-11 16:16:32,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:32,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:32,184 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:32,185 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724235755] [2020-09-11 16:16:32,185 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324295797] [2020-09-11 16:16:32,185 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:32,233 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-11 16:16:32,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:32,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:16:32,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:32,261 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:32,278 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:32,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:32,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-11 16:16:32,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170362112] [2020-09-11 16:16:32,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 16:16:32,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:32,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 16:16:32,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-09-11 16:16:32,282 INFO L87 Difference]: Start difference. First operand 58 states and 149 transitions. Second operand 12 states. [2020-09-11 16:16:32,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:32,782 INFO L93 Difference]: Finished difference Result 77 states and 183 transitions. [2020-09-11 16:16:32,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 16:16:32,783 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-11 16:16:32,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:32,784 INFO L225 Difference]: With dead ends: 77 [2020-09-11 16:16:32,785 INFO L226 Difference]: Without dead ends: 69 [2020-09-11 16:16:32,785 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-09-11 16:16:32,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-11 16:16:32,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2020-09-11 16:16:32,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-11 16:16:32,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-09-11 16:16:32,789 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-09-11 16:16:32,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:32,790 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-09-11 16:16:32,790 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 16:16:32,790 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-09-11 16:16:32,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 16:16:32,791 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:32,791 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:32,992 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-09-11 16:16:32,992 INFO L427 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:32,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:32,992 INFO L82 PathProgramCache]: Analyzing trace with hash -186489920, now seen corresponding path program 37 times [2020-09-11 16:16:32,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:32,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73730359] [2020-09-11 16:16:32,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:33,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:33,134 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:33,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73730359] [2020-09-11 16:16:33,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112269226] [2020-09-11 16:16:33,135 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:33,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:33,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 16:16:33,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:33,196 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:33,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:33,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-11 16:16:33,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662838148] [2020-09-11 16:16:33,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 16:16:33,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:33,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 16:16:33,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-11 16:16:33,198 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 12 states. [2020-09-11 16:16:33,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:33,393 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-09-11 16:16:33,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-11 16:16:33,393 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-11 16:16:33,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:33,394 INFO L225 Difference]: With dead ends: 84 [2020-09-11 16:16:33,394 INFO L226 Difference]: Without dead ends: 78 [2020-09-11 16:16:33,394 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:16:33,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-11 16:16:33,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2020-09-11 16:16:33,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-11 16:16:33,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-11 16:16:33,398 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-09-11 16:16:33,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:33,398 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-11 16:16:33,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 16:16:33,398 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-11 16:16:33,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 16:16:33,399 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:33,399 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:33,607 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-09-11 16:16:33,608 INFO L427 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:33,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:33,608 INFO L82 PathProgramCache]: Analyzing trace with hash 333253156, now seen corresponding path program 38 times [2020-09-11 16:16:33,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:33,609 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556472324] [2020-09-11 16:16:33,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:33,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:33,729 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:33,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556472324] [2020-09-11 16:16:33,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706382593] [2020-09-11 16:16:33,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:33,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:16:33,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:33,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 16:16:33,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:33,808 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:33,823 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:33,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:33,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-11 16:16:33,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931915325] [2020-09-11 16:16:33,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:16:33,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:33,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:16:33,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:16:33,824 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-09-11 16:16:34,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:34,136 INFO L93 Difference]: Finished difference Result 81 states and 189 transitions. [2020-09-11 16:16:34,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 16:16:34,136 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-11 16:16:34,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:34,137 INFO L225 Difference]: With dead ends: 81 [2020-09-11 16:16:34,137 INFO L226 Difference]: Without dead ends: 75 [2020-09-11 16:16:34,137 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=391, Unknown=0, NotChecked=0, Total=552 [2020-09-11 16:16:34,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-11 16:16:34,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 56. [2020-09-11 16:16:34,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-11 16:16:34,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-11 16:16:34,140 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-09-11 16:16:34,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:34,141 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-11 16:16:34,141 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:16:34,141 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-11 16:16:34,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 16:16:34,141 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:34,142 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:34,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-09-11 16:16:34,349 INFO L427 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:34,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:34,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1988564386, now seen corresponding path program 39 times [2020-09-11 16:16:34,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:34,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797467496] [2020-09-11 16:16:34,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:34,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:34,466 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:34,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797467496] [2020-09-11 16:16:34,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086970922] [2020-09-11 16:16:34,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:34,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-11 16:16:34,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:34,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 16:16:34,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:34,539 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:34,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:34,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-11 16:16:34,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963854719] [2020-09-11 16:16:34,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 16:16:34,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:34,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 16:16:34,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-09-11 16:16:34,541 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-09-11 16:16:34,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:34,816 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-09-11 16:16:34,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 16:16:34,817 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-11 16:16:34,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:34,817 INFO L225 Difference]: With dead ends: 78 [2020-09-11 16:16:34,817 INFO L226 Difference]: Without dead ends: 72 [2020-09-11 16:16:34,818 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=146, Invalid=360, Unknown=0, NotChecked=0, Total=506 [2020-09-11 16:16:34,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-11 16:16:34,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2020-09-11 16:16:34,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-11 16:16:34,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-11 16:16:34,820 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-09-11 16:16:34,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:34,821 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-11 16:16:34,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 16:16:34,821 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-11 16:16:34,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 16:16:34,821 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:34,822 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:35,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-09-11 16:16:35,030 INFO L427 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:35,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:35,030 INFO L82 PathProgramCache]: Analyzing trace with hash 268436742, now seen corresponding path program 40 times [2020-09-11 16:16:35,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:35,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89322226] [2020-09-11 16:16:35,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:35,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:35,160 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:35,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89322226] [2020-09-11 16:16:35,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674214987] [2020-09-11 16:16:35,160 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:35,222 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:16:35,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:35,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 16:16:35,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:35,250 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:35,264 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:35,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:35,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-11 16:16:35,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116053813] [2020-09-11 16:16:35,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:16:35,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:35,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:16:35,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:16:35,265 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-09-11 16:16:35,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:35,655 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-09-11 16:16:35,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 16:16:35,658 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-11 16:16:35,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:35,659 INFO L225 Difference]: With dead ends: 77 [2020-09-11 16:16:35,659 INFO L226 Difference]: Without dead ends: 71 [2020-09-11 16:16:35,659 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2020-09-11 16:16:35,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-11 16:16:35,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2020-09-11 16:16:35,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-11 16:16:35,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-11 16:16:35,662 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-09-11 16:16:35,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:35,662 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-11 16:16:35,662 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:16:35,662 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-11 16:16:35,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 16:16:35,663 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:35,663 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:35,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-09-11 16:16:35,870 INFO L427 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:35,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:35,871 INFO L82 PathProgramCache]: Analyzing trace with hash 739432452, now seen corresponding path program 41 times [2020-09-11 16:16:35,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:35,872 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235708587] [2020-09-11 16:16:35,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:35,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:35,972 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:35,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235708587] [2020-09-11 16:16:35,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212535014] [2020-09-11 16:16:35,973 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:36,026 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-11 16:16:36,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:36,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 16:16:36,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:36,043 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:36,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:36,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-11 16:16:36,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607577442] [2020-09-11 16:16:36,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 16:16:36,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:36,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 16:16:36,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-09-11 16:16:36,044 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-09-11 16:16:36,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:36,378 INFO L93 Difference]: Finished difference Result 74 states and 175 transitions. [2020-09-11 16:16:36,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-11 16:16:36,379 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-11 16:16:36,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:36,379 INFO L225 Difference]: With dead ends: 74 [2020-09-11 16:16:36,380 INFO L226 Difference]: Without dead ends: 68 [2020-09-11 16:16:36,380 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-09-11 16:16:36,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-11 16:16:36,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2020-09-11 16:16:36,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-11 16:16:36,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-11 16:16:36,384 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-09-11 16:16:36,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:36,384 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-11 16:16:36,384 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 16:16:36,384 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-11 16:16:36,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 16:16:36,385 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:36,385 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:36,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:36,593 INFO L427 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:36,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:36,594 INFO L82 PathProgramCache]: Analyzing trace with hash 755519592, now seen corresponding path program 42 times [2020-09-11 16:16:36,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:36,594 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311044953] [2020-09-11 16:16:36,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:36,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:36,703 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:36,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311044953] [2020-09-11 16:16:36,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62638924] [2020-09-11 16:16:36,704 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:36,762 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-11 16:16:36,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:36,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 16:16:36,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:36,785 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:36,800 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:36,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:36,801 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-11 16:16:36,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165391427] [2020-09-11 16:16:36,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:16:36,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:36,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:16:36,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:16:36,803 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-09-11 16:16:37,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:37,263 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-09-11 16:16:37,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 16:16:37,268 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-11 16:16:37,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:37,269 INFO L225 Difference]: With dead ends: 73 [2020-09-11 16:16:37,269 INFO L226 Difference]: Without dead ends: 67 [2020-09-11 16:16:37,270 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=225, Invalid=531, Unknown=0, NotChecked=0, Total=756 [2020-09-11 16:16:37,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-09-11 16:16:37,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2020-09-11 16:16:37,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-11 16:16:37,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-11 16:16:37,273 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-09-11 16:16:37,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:37,273 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-11 16:16:37,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:16:37,273 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-11 16:16:37,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 16:16:37,274 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:37,274 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:37,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-09-11 16:16:37,484 INFO L427 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:37,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:37,485 INFO L82 PathProgramCache]: Analyzing trace with hash 756009702, now seen corresponding path program 43 times [2020-09-11 16:16:37,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:37,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412709437] [2020-09-11 16:16:37,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:37,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:37,612 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:37,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412709437] [2020-09-11 16:16:37,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307254409] [2020-09-11 16:16:37,614 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:37,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:37,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 16:16:37,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:37,695 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:37,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:37,695 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-11 16:16:37,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514571829] [2020-09-11 16:16:37,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 16:16:37,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:37,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 16:16:37,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-11 16:16:37,696 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-09-11 16:16:38,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:38,078 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-09-11 16:16:38,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 16:16:38,079 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-11 16:16:38,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:38,080 INFO L225 Difference]: With dead ends: 89 [2020-09-11 16:16:38,080 INFO L226 Difference]: Without dead ends: 83 [2020-09-11 16:16:38,081 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2020-09-11 16:16:38,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-11 16:16:38,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-09-11 16:16:38,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-11 16:16:38,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 153 transitions. [2020-09-11 16:16:38,084 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 153 transitions. Word has length 16 [2020-09-11 16:16:38,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:38,084 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 153 transitions. [2020-09-11 16:16:38,085 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 16:16:38,085 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 153 transitions. [2020-09-11 16:16:38,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 16:16:38,085 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:38,085 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:38,295 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:38,295 INFO L427 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:38,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:38,296 INFO L82 PathProgramCache]: Analyzing trace with hash 756026442, now seen corresponding path program 44 times [2020-09-11 16:16:38,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:38,297 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962132222] [2020-09-11 16:16:38,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:38,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:38,389 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:38,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962132222] [2020-09-11 16:16:38,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018496280] [2020-09-11 16:16:38,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:38,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:16:38,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:38,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 16:16:38,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:38,473 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:38,486 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:38,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:38,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-11 16:16:38,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301818762] [2020-09-11 16:16:38,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:16:38,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:38,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:16:38,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:16:38,488 INFO L87 Difference]: Start difference. First operand 60 states and 153 transitions. Second operand 13 states. [2020-09-11 16:16:38,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:38,987 INFO L93 Difference]: Finished difference Result 70 states and 169 transitions. [2020-09-11 16:16:38,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 16:16:38,987 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-11 16:16:38,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:38,988 INFO L225 Difference]: With dead ends: 70 [2020-09-11 16:16:38,989 INFO L226 Difference]: Without dead ends: 62 [2020-09-11 16:16:38,989 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=281, Invalid=589, Unknown=0, NotChecked=0, Total=870 [2020-09-11 16:16:38,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-09-11 16:16:38,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2020-09-11 16:16:38,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-11 16:16:38,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 108 transitions. [2020-09-11 16:16:38,992 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 108 transitions. Word has length 16 [2020-09-11 16:16:38,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:38,993 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 108 transitions. [2020-09-11 16:16:38,993 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:16:38,993 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 108 transitions. [2020-09-11 16:16:38,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 16:16:38,993 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:38,994 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:39,198 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-09-11 16:16:39,198 INFO L427 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:39,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:39,199 INFO L82 PathProgramCache]: Analyzing trace with hash 615233972, now seen corresponding path program 45 times [2020-09-11 16:16:39,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:39,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781097916] [2020-09-11 16:16:39,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:39,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:39,300 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:39,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781097916] [2020-09-11 16:16:39,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513805609] [2020-09-11 16:16:39,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:39,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-11 16:16:39,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:39,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 16:16:39,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:39,365 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:16:39,376 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:39,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:39,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-11 16:16:39,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352731235] [2020-09-11 16:16:39,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:16:39,377 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:39,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:16:39,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:16:39,378 INFO L87 Difference]: Start difference. First operand 45 states and 108 transitions. Second operand 13 states. [2020-09-11 16:16:39,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:39,835 INFO L93 Difference]: Finished difference Result 76 states and 183 transitions. [2020-09-11 16:16:39,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 16:16:39,836 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-11 16:16:39,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:39,836 INFO L225 Difference]: With dead ends: 76 [2020-09-11 16:16:39,836 INFO L226 Difference]: Without dead ends: 71 [2020-09-11 16:16:39,837 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2020-09-11 16:16:39,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-11 16:16:39,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2020-09-11 16:16:39,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-11 16:16:39,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-09-11 16:16:39,841 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 16 [2020-09-11 16:16:39,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:39,842 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-09-11 16:16:39,842 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:16:39,842 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-09-11 16:16:39,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 16:16:39,843 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:39,843 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:40,053 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:40,054 INFO L427 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:40,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:40,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1961999529, now seen corresponding path program 46 times [2020-09-11 16:16:40,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:40,055 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415567100] [2020-09-11 16:16:40,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:40,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:40,160 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:40,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415567100] [2020-09-11 16:16:40,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263180561] [2020-09-11 16:16:40,161 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:40,211 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:16:40,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:40,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 16:16:40,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:40,243 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:16:40,257 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:40,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:40,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-11 16:16:40,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882101347] [2020-09-11 16:16:40,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 16:16:40,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:40,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 16:16:40,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-09-11 16:16:40,259 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 14 states. [2020-09-11 16:16:40,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:40,779 INFO L93 Difference]: Finished difference Result 66 states and 165 transitions. [2020-09-11 16:16:40,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 16:16:40,779 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-11 16:16:40,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:40,780 INFO L225 Difference]: With dead ends: 66 [2020-09-11 16:16:40,781 INFO L226 Difference]: Without dead ends: 61 [2020-09-11 16:16:40,781 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-09-11 16:16:40,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-11 16:16:40,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2020-09-11 16:16:40,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-11 16:16:40,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-09-11 16:16:40,784 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 17 [2020-09-11 16:16:40,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:40,785 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-09-11 16:16:40,785 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 16:16:40,785 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-09-11 16:16:40,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 16:16:40,785 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:40,785 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:40,996 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-09-11 16:16:40,997 INFO L427 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:40,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:40,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1923197356, now seen corresponding path program 47 times [2020-09-11 16:16:40,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:40,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445612100] [2020-09-11 16:16:40,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:41,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:41,141 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:41,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445612100] [2020-09-11 16:16:41,142 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183138484] [2020-09-11 16:16:41,142 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:41,199 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-11 16:16:41,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:41,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 16:16:41,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:41,215 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:41,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:41,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-11 16:16:41,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734702815] [2020-09-11 16:16:41,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:16:41,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:41,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:16:41,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:16:41,217 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 13 states. [2020-09-11 16:16:41,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:41,395 INFO L93 Difference]: Finished difference Result 72 states and 167 transitions. [2020-09-11 16:16:41,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-11 16:16:41,395 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-11 16:16:41,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:41,396 INFO L225 Difference]: With dead ends: 72 [2020-09-11 16:16:41,396 INFO L226 Difference]: Without dead ends: 66 [2020-09-11 16:16:41,397 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:16:41,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-11 16:16:41,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-09-11 16:16:41,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-11 16:16:41,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 131 transitions. [2020-09-11 16:16:41,399 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 131 transitions. Word has length 17 [2020-09-11 16:16:41,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:41,400 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 131 transitions. [2020-09-11 16:16:41,400 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:16:41,400 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 131 transitions. [2020-09-11 16:16:41,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 16:16:41,400 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:41,401 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:41,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-09-11 16:16:41,609 INFO L427 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:41,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:41,609 INFO L82 PathProgramCache]: Analyzing trace with hash -666307656, now seen corresponding path program 48 times [2020-09-11 16:16:41,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:41,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149266292] [2020-09-11 16:16:41,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:41,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:41,749 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:41,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149266292] [2020-09-11 16:16:41,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221372981] [2020-09-11 16:16:41,750 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:41,822 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-11 16:16:41,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:41,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 16:16:41,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:41,850 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:41,864 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:41,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:41,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-11 16:16:41,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765248940] [2020-09-11 16:16:41,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 16:16:41,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:41,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 16:16:41,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-09-11 16:16:41,867 INFO L87 Difference]: Start difference. First operand 54 states and 131 transitions. Second operand 14 states. [2020-09-11 16:16:42,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:42,146 INFO L93 Difference]: Finished difference Result 82 states and 187 transitions. [2020-09-11 16:16:42,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 16:16:42,146 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-11 16:16:42,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:42,147 INFO L225 Difference]: With dead ends: 82 [2020-09-11 16:16:42,147 INFO L226 Difference]: Without dead ends: 76 [2020-09-11 16:16:42,148 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2020-09-11 16:16:42,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-11 16:16:42,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2020-09-11 16:16:42,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-11 16:16:42,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-09-11 16:16:42,150 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 17 [2020-09-11 16:16:42,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:42,150 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-09-11 16:16:42,151 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 16:16:42,151 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-09-11 16:16:42,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 16:16:42,151 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:42,151 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:42,359 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-09-11 16:16:42,359 INFO L427 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:42,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:42,360 INFO L82 PathProgramCache]: Analyzing trace with hash 949884854, now seen corresponding path program 49 times [2020-09-11 16:16:42,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:42,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657154924] [2020-09-11 16:16:42,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:42,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:42,507 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:42,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657154924] [2020-09-11 16:16:42,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148163680] [2020-09-11 16:16:42,508 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:42,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:42,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 16:16:42,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:42,609 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:42,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:42,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-11 16:16:42,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659634824] [2020-09-11 16:16:42,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:16:42,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:42,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:16:42,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:16:42,612 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 13 states. [2020-09-11 16:16:42,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:42,905 INFO L93 Difference]: Finished difference Result 83 states and 191 transitions. [2020-09-11 16:16:42,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-11 16:16:42,906 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-11 16:16:42,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:42,907 INFO L225 Difference]: With dead ends: 83 [2020-09-11 16:16:42,907 INFO L226 Difference]: Without dead ends: 77 [2020-09-11 16:16:42,907 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2020-09-11 16:16:42,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-11 16:16:42,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-09-11 16:16:42,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-11 16:16:42,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 135 transitions. [2020-09-11 16:16:42,910 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 135 transitions. Word has length 17 [2020-09-11 16:16:42,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:42,910 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 135 transitions. [2020-09-11 16:16:42,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:16:42,911 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 135 transitions. [2020-09-11 16:16:42,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 16:16:42,911 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:42,911 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:43,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-09-11 16:16:43,122 INFO L427 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:43,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:43,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1469627930, now seen corresponding path program 50 times [2020-09-11 16:16:43,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:43,123 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529422579] [2020-09-11 16:16:43,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:43,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:43,301 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:43,301 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529422579] [2020-09-11 16:16:43,301 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088257818] [2020-09-11 16:16:43,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:43,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:16:43,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:43,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 16:16:43,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:43,384 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:43,400 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:43,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:43,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-11 16:16:43,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923080557] [2020-09-11 16:16:43,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 16:16:43,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:43,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 16:16:43,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-09-11 16:16:43,402 INFO L87 Difference]: Start difference. First operand 55 states and 135 transitions. Second operand 14 states. [2020-09-11 16:16:43,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:43,761 INFO L93 Difference]: Finished difference Result 89 states and 203 transitions. [2020-09-11 16:16:43,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 16:16:43,762 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-11 16:16:43,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:43,763 INFO L225 Difference]: With dead ends: 89 [2020-09-11 16:16:43,763 INFO L226 Difference]: Without dead ends: 83 [2020-09-11 16:16:43,764 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2020-09-11 16:16:43,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-11 16:16:43,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54. [2020-09-11 16:16:43,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-11 16:16:43,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 133 transitions. [2020-09-11 16:16:43,769 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 133 transitions. Word has length 17 [2020-09-11 16:16:43,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:43,769 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 133 transitions. [2020-09-11 16:16:43,769 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 16:16:43,770 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 133 transitions. [2020-09-11 16:16:43,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 16:16:43,770 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:43,770 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:43,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:43,971 INFO L427 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:43,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:43,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1170028136, now seen corresponding path program 51 times [2020-09-11 16:16:43,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:43,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340562431] [2020-09-11 16:16:43,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:43,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:44,090 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:44,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340562431] [2020-09-11 16:16:44,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871802889] [2020-09-11 16:16:44,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:44,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-11 16:16:44,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:44,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 16:16:44,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:44,180 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:44,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:44,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-11 16:16:44,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462201518] [2020-09-11 16:16:44,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:16:44,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:44,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:16:44,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:16:44,183 INFO L87 Difference]: Start difference. First operand 54 states and 133 transitions. Second operand 13 states. [2020-09-11 16:16:44,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:44,558 INFO L93 Difference]: Finished difference Result 89 states and 205 transitions. [2020-09-11 16:16:44,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 16:16:44,559 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-11 16:16:44,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:44,560 INFO L225 Difference]: With dead ends: 89 [2020-09-11 16:16:44,560 INFO L226 Difference]: Without dead ends: 83 [2020-09-11 16:16:44,560 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-09-11 16:16:44,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-11 16:16:44,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 57. [2020-09-11 16:16:44,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-11 16:16:44,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-11 16:16:44,563 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 17 [2020-09-11 16:16:44,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:44,563 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-11 16:16:44,563 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:16:44,563 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-11 16:16:44,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 16:16:44,564 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:44,564 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:44,773 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:44,773 INFO L427 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:44,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:44,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1404811516, now seen corresponding path program 52 times [2020-09-11 16:16:44,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:44,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556417555] [2020-09-11 16:16:44,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:44,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:44,914 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:44,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556417555] [2020-09-11 16:16:44,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128729831] [2020-09-11 16:16:44,915 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:44,969 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:16:44,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:44,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 16:16:44,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:44,990 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:45,003 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:45,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:45,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-11 16:16:45,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583623542] [2020-09-11 16:16:45,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 16:16:45,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:45,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 16:16:45,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-09-11 16:16:45,005 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 14 states. [2020-09-11 16:16:45,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:45,447 INFO L93 Difference]: Finished difference Result 86 states and 199 transitions. [2020-09-11 16:16:45,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 16:16:45,448 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-11 16:16:45,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:45,449 INFO L225 Difference]: With dead ends: 86 [2020-09-11 16:16:45,449 INFO L226 Difference]: Without dead ends: 80 [2020-09-11 16:16:45,450 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=585, Unknown=0, NotChecked=0, Total=812 [2020-09-11 16:16:45,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-11 16:16:45,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2020-09-11 16:16:45,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-11 16:16:45,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-11 16:16:45,452 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 17 [2020-09-11 16:16:45,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:45,453 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-11 16:16:45,453 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 16:16:45,453 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-11 16:16:45,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 16:16:45,453 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:45,453 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:45,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-09-11 16:16:45,655 INFO L427 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:45,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:45,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1875807226, now seen corresponding path program 53 times [2020-09-11 16:16:45,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:45,656 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296077373] [2020-09-11 16:16:45,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:45,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:45,783 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:45,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296077373] [2020-09-11 16:16:45,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413085148] [2020-09-11 16:16:45,783 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:45,845 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-11 16:16:45,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:45,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 16:16:45,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:45,866 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:45,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:45,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-11 16:16:45,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670486906] [2020-09-11 16:16:45,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:16:45,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:45,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:16:45,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:16:45,874 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 13 states. [2020-09-11 16:16:46,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:46,256 INFO L93 Difference]: Finished difference Result 87 states and 203 transitions. [2020-09-11 16:16:46,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-11 16:16:46,256 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-11 16:16:46,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:46,257 INFO L225 Difference]: With dead ends: 87 [2020-09-11 16:16:46,257 INFO L226 Difference]: Without dead ends: 81 [2020-09-11 16:16:46,258 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2020-09-11 16:16:46,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-11 16:16:46,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 59. [2020-09-11 16:16:46,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-11 16:16:46,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-09-11 16:16:46,262 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 17 [2020-09-11 16:16:46,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:46,262 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-09-11 16:16:46,262 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:16:46,262 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-09-11 16:16:46,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 16:16:46,263 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:46,263 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:46,473 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:46,473 INFO L427 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:46,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:46,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1891894366, now seen corresponding path program 54 times [2020-09-11 16:16:46,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:46,475 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055012874] [2020-09-11 16:16:46,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:46,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:46,596 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:46,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055012874] [2020-09-11 16:16:46,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250365093] [2020-09-11 16:16:46,597 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:46,650 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-11 16:16:46,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:46,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 16:16:46,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:46,673 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:46,686 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:46,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:46,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-11 16:16:46,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490155522] [2020-09-11 16:16:46,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 16:16:46,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:46,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 16:16:46,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-09-11 16:16:46,687 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-09-11 16:16:47,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:47,209 INFO L93 Difference]: Finished difference Result 84 states and 197 transitions. [2020-09-11 16:16:47,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 16:16:47,210 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-11 16:16:47,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:47,211 INFO L225 Difference]: With dead ends: 84 [2020-09-11 16:16:47,211 INFO L226 Difference]: Without dead ends: 78 [2020-09-11 16:16:47,212 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=274, Invalid=656, Unknown=0, NotChecked=0, Total=930 [2020-09-11 16:16:47,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-11 16:16:47,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 58. [2020-09-11 16:16:47,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-11 16:16:47,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-09-11 16:16:47,215 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 17 [2020-09-11 16:16:47,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:47,216 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-09-11 16:16:47,216 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 16:16:47,216 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-09-11 16:16:47,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 16:16:47,216 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:47,216 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:47,425 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-09-11 16:16:47,425 INFO L427 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:47,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:47,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1892384476, now seen corresponding path program 55 times [2020-09-11 16:16:47,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:47,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047302696] [2020-09-11 16:16:47,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:47,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:47,528 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:47,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047302696] [2020-09-11 16:16:47,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428015030] [2020-09-11 16:16:47,529 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:47,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:47,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 16:16:47,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:47,608 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:47,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:47,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-11 16:16:47,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142484671] [2020-09-11 16:16:47,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:16:47,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:47,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:16:47,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:16:47,610 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 13 states. [2020-09-11 16:16:48,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:48,049 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-09-11 16:16:48,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 16:16:48,049 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-11 16:16:48,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:48,050 INFO L225 Difference]: With dead ends: 104 [2020-09-11 16:16:48,050 INFO L226 Difference]: Without dead ends: 98 [2020-09-11 16:16:48,051 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=326, Invalid=666, Unknown=0, NotChecked=0, Total=992 [2020-09-11 16:16:48,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-11 16:16:48,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2020-09-11 16:16:48,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-11 16:16:48,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 165 transitions. [2020-09-11 16:16:48,054 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 165 transitions. Word has length 17 [2020-09-11 16:16:48,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:48,054 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 165 transitions. [2020-09-11 16:16:48,054 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:16:48,054 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 165 transitions. [2020-09-11 16:16:48,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 16:16:48,055 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:48,055 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:48,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-09-11 16:16:48,266 INFO L427 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:48,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:48,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1892401216, now seen corresponding path program 56 times [2020-09-11 16:16:48,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:48,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363451930] [2020-09-11 16:16:48,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:48,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:48,377 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:48,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363451930] [2020-09-11 16:16:48,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075027104] [2020-09-11 16:16:48,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:48,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:16:48,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:48,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 16:16:48,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:48,461 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:48,471 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:48,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:48,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-11 16:16:48,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339074720] [2020-09-11 16:16:48,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 16:16:48,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:48,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 16:16:48,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-09-11 16:16:48,473 INFO L87 Difference]: Start difference. First operand 64 states and 165 transitions. Second operand 14 states. [2020-09-11 16:16:49,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:49,036 INFO L93 Difference]: Finished difference Result 85 states and 203 transitions. [2020-09-11 16:16:49,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 16:16:49,037 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-11 16:16:49,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:49,038 INFO L225 Difference]: With dead ends: 85 [2020-09-11 16:16:49,038 INFO L226 Difference]: Without dead ends: 77 [2020-09-11 16:16:49,038 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2020-09-11 16:16:49,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-11 16:16:49,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2020-09-11 16:16:49,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-11 16:16:49,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-09-11 16:16:49,042 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-09-11 16:16:49,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:49,042 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-09-11 16:16:49,042 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 16:16:49,043 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-09-11 16:16:49,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 16:16:49,043 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:49,043 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:49,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-09-11 16:16:49,251 INFO L427 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:49,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:49,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1171829247, now seen corresponding path program 57 times [2020-09-11 16:16:49,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:49,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690606425] [2020-09-11 16:16:49,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:49,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:49,436 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:49,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690606425] [2020-09-11 16:16:49,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780062167] [2020-09-11 16:16:49,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:49,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-11 16:16:49,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:49,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 16:16:49,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:49,512 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:49,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:49,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-11 16:16:49,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704060053] [2020-09-11 16:16:49,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 16:16:49,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:49,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 16:16:49,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-09-11 16:16:49,513 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 14 states. [2020-09-11 16:16:49,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:49,788 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-09-11 16:16:49,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 16:16:49,789 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-11 16:16:49,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:49,790 INFO L225 Difference]: With dead ends: 94 [2020-09-11 16:16:49,790 INFO L226 Difference]: Without dead ends: 88 [2020-09-11 16:16:49,790 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2020-09-11 16:16:49,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-11 16:16:49,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 63. [2020-09-11 16:16:49,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-11 16:16:49,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-11 16:16:49,793 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-09-11 16:16:49,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:49,793 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-11 16:16:49,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 16:16:49,794 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-11 16:16:49,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 16:16:49,794 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:49,794 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:50,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-09-11 16:16:50,003 INFO L427 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:50,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:50,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1866248349, now seen corresponding path program 58 times [2020-09-11 16:16:50,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:50,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659088097] [2020-09-11 16:16:50,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:50,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:50,163 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:50,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659088097] [2020-09-11 16:16:50,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131616188] [2020-09-11 16:16:50,164 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:50,218 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:16:50,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:50,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 16:16:50,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:50,249 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:50,263 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:50,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:50,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-11 16:16:50,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365688532] [2020-09-11 16:16:50,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:16:50,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:50,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:16:50,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:16:50,264 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-09-11 16:16:50,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:50,642 INFO L93 Difference]: Finished difference Result 91 states and 213 transitions. [2020-09-11 16:16:50,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 16:16:50,643 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-11 16:16:50,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:50,644 INFO L225 Difference]: With dead ends: 91 [2020-09-11 16:16:50,644 INFO L226 Difference]: Without dead ends: 85 [2020-09-11 16:16:50,644 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-09-11 16:16:50,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-11 16:16:50,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-09-11 16:16:50,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-11 16:16:50,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-11 16:16:50,646 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-09-11 16:16:50,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:50,647 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-11 16:16:50,647 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:16:50,647 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-11 16:16:50,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 16:16:50,647 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:50,647 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:50,856 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-09-11 16:16:50,856 INFO L427 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:50,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:50,857 INFO L82 PathProgramCache]: Analyzing trace with hash -250055839, now seen corresponding path program 59 times [2020-09-11 16:16:50,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:50,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774985462] [2020-09-11 16:16:50,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:50,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:51,018 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:51,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774985462] [2020-09-11 16:16:51,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784197749] [2020-09-11 16:16:51,019 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:51,074 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-11 16:16:51,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:51,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 16:16:51,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:51,092 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:51,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:51,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-11 16:16:51,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015730174] [2020-09-11 16:16:51,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 16:16:51,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:51,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 16:16:51,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-09-11 16:16:51,093 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-09-11 16:16:51,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:51,416 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-09-11 16:16:51,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-11 16:16:51,417 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-11 16:16:51,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:51,418 INFO L225 Difference]: With dead ends: 88 [2020-09-11 16:16:51,418 INFO L226 Difference]: Without dead ends: 82 [2020-09-11 16:16:51,418 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=198, Invalid=504, Unknown=0, NotChecked=0, Total=702 [2020-09-11 16:16:51,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-11 16:16:51,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 63. [2020-09-11 16:16:51,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-11 16:16:51,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-11 16:16:51,421 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-09-11 16:16:51,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:51,422 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-11 16:16:51,422 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 16:16:51,422 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-11 16:16:51,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 16:16:51,422 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:51,422 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:51,630 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:51,630 INFO L427 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:51,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:51,631 INFO L82 PathProgramCache]: Analyzing trace with hash 269687237, now seen corresponding path program 60 times [2020-09-11 16:16:51,631 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:51,632 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041449714] [2020-09-11 16:16:51,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:51,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:51,794 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:51,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041449714] [2020-09-11 16:16:51,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303112788] [2020-09-11 16:16:51,795 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:51,853 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-11 16:16:51,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:51,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 16:16:51,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:51,876 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:51,891 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:51,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:51,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-11 16:16:51,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125156061] [2020-09-11 16:16:51,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:16:51,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:51,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:16:51,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:16:51,900 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-09-11 16:16:52,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:52,380 INFO L93 Difference]: Finished difference Result 87 states and 205 transitions. [2020-09-11 16:16:52,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 16:16:52,380 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-11 16:16:52,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:52,381 INFO L225 Difference]: With dead ends: 87 [2020-09-11 16:16:52,382 INFO L226 Difference]: Without dead ends: 81 [2020-09-11 16:16:52,382 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=240, Invalid=630, Unknown=0, NotChecked=0, Total=870 [2020-09-11 16:16:52,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-11 16:16:52,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 62. [2020-09-11 16:16:52,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-11 16:16:52,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-11 16:16:52,384 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-09-11 16:16:52,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:52,384 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-11 16:16:52,384 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:16:52,385 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-11 16:16:52,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 16:16:52,385 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:52,385 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:52,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:52,586 INFO L427 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:52,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:52,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1924998467, now seen corresponding path program 61 times [2020-09-11 16:16:52,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:52,587 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811663998] [2020-09-11 16:16:52,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:52,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:52,719 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:52,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811663998] [2020-09-11 16:16:52,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771092106] [2020-09-11 16:16:52,720 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:52,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:52,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 16:16:52,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:52,798 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:52,798 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:52,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-11 16:16:52,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718520052] [2020-09-11 16:16:52,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 16:16:52,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:52,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 16:16:52,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-09-11 16:16:52,800 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-09-11 16:16:53,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:53,210 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-09-11 16:16:53,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 16:16:53,211 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-11 16:16:53,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:53,212 INFO L225 Difference]: With dead ends: 84 [2020-09-11 16:16:53,212 INFO L226 Difference]: Without dead ends: 78 [2020-09-11 16:16:53,212 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-09-11 16:16:53,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-11 16:16:53,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 63. [2020-09-11 16:16:53,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-11 16:16:53,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-11 16:16:53,215 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-09-11 16:16:53,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:53,215 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-11 16:16:53,215 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 16:16:53,215 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-11 16:16:53,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 16:16:53,216 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:53,216 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:53,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2020-09-11 16:16:53,424 INFO L427 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:53,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:53,425 INFO L82 PathProgramCache]: Analyzing trace with hash 204870823, now seen corresponding path program 62 times [2020-09-11 16:16:53,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:53,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736621238] [2020-09-11 16:16:53,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:53,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:53,560 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:53,560 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736621238] [2020-09-11 16:16:53,560 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191860149] [2020-09-11 16:16:53,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:53,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:16:53,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:53,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 16:16:53,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:53,654 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:53,669 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:53,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:53,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-11 16:16:53,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365708123] [2020-09-11 16:16:53,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:16:53,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:53,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:16:53,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:16:53,671 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-09-11 16:16:54,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:54,225 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-09-11 16:16:54,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 16:16:54,226 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-11 16:16:54,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:54,227 INFO L225 Difference]: With dead ends: 83 [2020-09-11 16:16:54,227 INFO L226 Difference]: Without dead ends: 77 [2020-09-11 16:16:54,227 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-09-11 16:16:54,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-11 16:16:54,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 62. [2020-09-11 16:16:54,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-11 16:16:54,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-11 16:16:54,231 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-09-11 16:16:54,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:54,231 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-11 16:16:54,231 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:16:54,231 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-11 16:16:54,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 16:16:54,232 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:54,232 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:54,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:54,439 INFO L427 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:54,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:54,439 INFO L82 PathProgramCache]: Analyzing trace with hash 675866533, now seen corresponding path program 63 times [2020-09-11 16:16:54,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:54,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127820384] [2020-09-11 16:16:54,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:54,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:54,602 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:54,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127820384] [2020-09-11 16:16:54,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612227809] [2020-09-11 16:16:54,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:54,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-11 16:16:54,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:54,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 16:16:54,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:54,679 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:54,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:54,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-11 16:16:54,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688369888] [2020-09-11 16:16:54,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 16:16:54,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:54,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 16:16:54,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-09-11 16:16:54,681 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-09-11 16:16:55,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:55,155 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2020-09-11 16:16:55,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-11 16:16:55,156 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-11 16:16:55,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:55,157 INFO L225 Difference]: With dead ends: 80 [2020-09-11 16:16:55,157 INFO L226 Difference]: Without dead ends: 74 [2020-09-11 16:16:55,157 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=276, Invalid=654, Unknown=0, NotChecked=0, Total=930 [2020-09-11 16:16:55,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-09-11 16:16:55,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 63. [2020-09-11 16:16:55,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-11 16:16:55,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-11 16:16:55,159 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-09-11 16:16:55,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:55,160 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-11 16:16:55,160 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 16:16:55,160 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-11 16:16:55,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 16:16:55,161 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:55,161 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:55,361 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-09-11 16:16:55,362 INFO L427 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:55,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:55,362 INFO L82 PathProgramCache]: Analyzing trace with hash 691953673, now seen corresponding path program 64 times [2020-09-11 16:16:55,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:55,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404952271] [2020-09-11 16:16:55,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:55,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:55,522 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:55,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404952271] [2020-09-11 16:16:55,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372389283] [2020-09-11 16:16:55,523 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:55,581 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:16:55,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:55,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 16:16:55,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:55,614 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:55,627 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:55,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:55,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-11 16:16:55,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537246218] [2020-09-11 16:16:55,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:16:55,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:55,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:16:55,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:16:55,629 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-09-11 16:16:56,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:56,261 INFO L93 Difference]: Finished difference Result 79 states and 189 transitions. [2020-09-11 16:16:56,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 16:16:56,261 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-11 16:16:56,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:56,262 INFO L225 Difference]: With dead ends: 79 [2020-09-11 16:16:56,263 INFO L226 Difference]: Without dead ends: 73 [2020-09-11 16:16:56,263 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=332, Invalid=790, Unknown=0, NotChecked=0, Total=1122 [2020-09-11 16:16:56,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-11 16:16:56,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2020-09-11 16:16:56,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-11 16:16:56,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-11 16:16:56,265 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-09-11 16:16:56,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:56,265 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-11 16:16:56,265 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:16:56,265 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-11 16:16:56,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 16:16:56,265 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:56,265 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:56,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:56,469 INFO L427 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:56,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:56,469 INFO L82 PathProgramCache]: Analyzing trace with hash 692443783, now seen corresponding path program 65 times [2020-09-11 16:16:56,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:56,470 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147037655] [2020-09-11 16:16:56,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:56,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:56,615 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:56,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147037655] [2020-09-11 16:16:56,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522374026] [2020-09-11 16:16:56,616 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:56,672 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-11 16:16:56,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:56,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 16:16:56,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:56,689 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:56,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:56,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-11 16:16:56,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699298602] [2020-09-11 16:16:56,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 16:16:56,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:56,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 16:16:56,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-09-11 16:16:56,692 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-09-11 16:16:57,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:57,211 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-09-11 16:16:57,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 16:16:57,211 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-11 16:16:57,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:57,212 INFO L225 Difference]: With dead ends: 95 [2020-09-11 16:16:57,213 INFO L226 Difference]: Without dead ends: 89 [2020-09-11 16:16:57,213 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=339, Invalid=717, Unknown=0, NotChecked=0, Total=1056 [2020-09-11 16:16:57,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-11 16:16:57,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 66. [2020-09-11 16:16:57,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-11 16:16:57,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 169 transitions. [2020-09-11 16:16:57,215 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 169 transitions. Word has length 18 [2020-09-11 16:16:57,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:57,215 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 169 transitions. [2020-09-11 16:16:57,215 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 16:16:57,215 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 169 transitions. [2020-09-11 16:16:57,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 16:16:57,216 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:57,216 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:57,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-09-11 16:16:57,417 INFO L427 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:57,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:57,417 INFO L82 PathProgramCache]: Analyzing trace with hash 692460523, now seen corresponding path program 66 times [2020-09-11 16:16:57,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:57,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475099332] [2020-09-11 16:16:57,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:57,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:57,534 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:57,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475099332] [2020-09-11 16:16:57,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893038604] [2020-09-11 16:16:57,535 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:57,588 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-11 16:16:57,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:57,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 16:16:57,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:57,609 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:57,622 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:57,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:57,623 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-11 16:16:57,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355258861] [2020-09-11 16:16:57,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:16:57,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:57,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:16:57,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:16:57,625 INFO L87 Difference]: Start difference. First operand 66 states and 169 transitions. Second operand 15 states. [2020-09-11 16:16:58,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:58,329 INFO L93 Difference]: Finished difference Result 76 states and 185 transitions. [2020-09-11 16:16:58,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 16:16:58,329 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-11 16:16:58,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:58,330 INFO L225 Difference]: With dead ends: 76 [2020-09-11 16:16:58,331 INFO L226 Difference]: Without dead ends: 68 [2020-09-11 16:16:58,331 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=402, Invalid=858, Unknown=0, NotChecked=0, Total=1260 [2020-09-11 16:16:58,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-11 16:16:58,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 49. [2020-09-11 16:16:58,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-11 16:16:58,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 118 transitions. [2020-09-11 16:16:58,333 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 118 transitions. Word has length 18 [2020-09-11 16:16:58,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:58,334 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 118 transitions. [2020-09-11 16:16:58,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:16:58,334 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 118 transitions. [2020-09-11 16:16:58,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 16:16:58,334 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:58,334 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:58,535 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:58,535 INFO L427 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:58,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:58,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1465088141, now seen corresponding path program 67 times [2020-09-11 16:16:58,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:58,537 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439963026] [2020-09-11 16:16:58,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:58,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:58,665 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:58,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439963026] [2020-09-11 16:16:58,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187654165] [2020-09-11 16:16:58,666 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:58,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:58,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 16:16:58,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:58,746 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:16:58,761 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:58,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:58,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-11 16:16:58,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866836599] [2020-09-11 16:16:58,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:16:58,763 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:58,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:16:58,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:16:58,764 INFO L87 Difference]: Start difference. First operand 49 states and 118 transitions. Second operand 15 states. [2020-09-11 16:16:59,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:59,393 INFO L93 Difference]: Finished difference Result 84 states and 203 transitions. [2020-09-11 16:16:59,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 16:16:59,394 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-11 16:16:59,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:59,395 INFO L225 Difference]: With dead ends: 84 [2020-09-11 16:16:59,395 INFO L226 Difference]: Without dead ends: 79 [2020-09-11 16:16:59,396 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2020-09-11 16:16:59,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-11 16:16:59,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 64. [2020-09-11 16:16:59,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-11 16:16:59,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-09-11 16:16:59,398 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 18 [2020-09-11 16:16:59,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:59,398 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-09-11 16:16:59,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:16:59,398 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-09-11 16:16:59,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 16:16:59,399 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:59,399 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:59,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-09-11 16:16:59,600 INFO L427 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:59,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:59,601 INFO L82 PathProgramCache]: Analyzing trace with hash -8543960, now seen corresponding path program 68 times [2020-09-11 16:16:59,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:59,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047392070] [2020-09-11 16:16:59,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:59,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:59,758 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:59,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047392070] [2020-09-11 16:16:59,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358142441] [2020-09-11 16:16:59,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:59,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:16:59,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:59,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 16:16:59,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:59,840 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:16:59,865 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:59,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:59,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-11 16:16:59,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438834626] [2020-09-11 16:16:59,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 16:16:59,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:59,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 16:16:59,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-09-11 16:16:59,867 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 16 states. [2020-09-11 16:17:00,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:00,559 INFO L93 Difference]: Finished difference Result 72 states and 181 transitions. [2020-09-11 16:17:00,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 16:17:00,560 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-11 16:17:00,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:00,561 INFO L225 Difference]: With dead ends: 72 [2020-09-11 16:17:00,561 INFO L226 Difference]: Without dead ends: 67 [2020-09-11 16:17:00,561 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=439, Invalid=893, Unknown=0, NotChecked=0, Total=1332 [2020-09-11 16:17:00,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-09-11 16:17:00,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-09-11 16:17:00,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-11 16:17:00,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 122 transitions. [2020-09-11 16:17:00,564 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 122 transitions. Word has length 19 [2020-09-11 16:17:00,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:00,564 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 122 transitions. [2020-09-11 16:17:00,564 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 16:17:00,564 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 122 transitions. [2020-09-11 16:17:00,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 16:17:00,565 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:00,565 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:00,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-09-11 16:17:00,774 INFO L427 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:00,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:00,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1356705901, now seen corresponding path program 69 times [2020-09-11 16:17:00,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:00,775 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684650862] [2020-09-11 16:17:00,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:00,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:00,980 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:00,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684650862] [2020-09-11 16:17:00,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186715298] [2020-09-11 16:17:00,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:01,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-11 16:17:01,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:01,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 16:17:01,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:01,054 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:01,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:01,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-11 16:17:01,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786974783] [2020-09-11 16:17:01,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:17:01,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:01,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:17:01,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:17:01,055 INFO L87 Difference]: Start difference. First operand 50 states and 122 transitions. Second operand 15 states. [2020-09-11 16:17:01,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:01,362 INFO L93 Difference]: Finished difference Result 78 states and 181 transitions. [2020-09-11 16:17:01,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 16:17:01,363 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-11 16:17:01,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:01,364 INFO L225 Difference]: With dead ends: 78 [2020-09-11 16:17:01,364 INFO L226 Difference]: Without dead ends: 72 [2020-09-11 16:17:01,364 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=213, Invalid=437, Unknown=0, NotChecked=0, Total=650 [2020-09-11 16:17:01,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-11 16:17:01,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 58. [2020-09-11 16:17:01,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-11 16:17:01,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 141 transitions. [2020-09-11 16:17:01,366 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 141 transitions. Word has length 19 [2020-09-11 16:17:01,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:01,366 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 141 transitions. [2020-09-11 16:17:01,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:17:01,366 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 141 transitions. [2020-09-11 16:17:01,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 16:17:01,367 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:01,367 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:01,567 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:01,568 INFO L427 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:01,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:01,568 INFO L82 PathProgramCache]: Analyzing trace with hash -371514377, now seen corresponding path program 70 times [2020-09-11 16:17:01,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:01,569 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693684758] [2020-09-11 16:17:01,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:01,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:01,769 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:01,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693684758] [2020-09-11 16:17:01,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681435049] [2020-09-11 16:17:01,770 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:01,824 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:17:01,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:01,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 16:17:01,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:01,846 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:01,856 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:01,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:01,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-11 16:17:01,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220371897] [2020-09-11 16:17:01,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 16:17:01,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:01,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 16:17:01,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-09-11 16:17:01,858 INFO L87 Difference]: Start difference. First operand 58 states and 141 transitions. Second operand 16 states. [2020-09-11 16:17:02,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:02,220 INFO L93 Difference]: Finished difference Result 90 states and 205 transitions. [2020-09-11 16:17:02,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 16:17:02,221 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-11 16:17:02,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:02,221 INFO L225 Difference]: With dead ends: 90 [2020-09-11 16:17:02,221 INFO L226 Difference]: Without dead ends: 84 [2020-09-11 16:17:02,222 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756 [2020-09-11 16:17:02,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-11 16:17:02,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 56. [2020-09-11 16:17:02,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-11 16:17:02,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 137 transitions. [2020-09-11 16:17:02,223 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 137 transitions. Word has length 19 [2020-09-11 16:17:02,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:02,223 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 137 transitions. [2020-09-11 16:17:02,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 16:17:02,223 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 137 transitions. [2020-09-11 16:17:02,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 16:17:02,224 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:02,224 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:02,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:02,425 INFO L427 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:02,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:02,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1988673419, now seen corresponding path program 71 times [2020-09-11 16:17:02,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:02,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889966832] [2020-09-11 16:17:02,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:02,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:02,601 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:02,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889966832] [2020-09-11 16:17:02,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477159964] [2020-09-11 16:17:02,601 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:02,661 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-11 16:17:02,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:02,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 16:17:02,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:02,682 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:02,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:02,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-11 16:17:02,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869612868] [2020-09-11 16:17:02,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:17:02,683 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:02,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:17:02,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:17:02,684 INFO L87 Difference]: Start difference. First operand 56 states and 137 transitions. Second operand 15 states. [2020-09-11 16:17:03,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:03,090 INFO L93 Difference]: Finished difference Result 91 states and 209 transitions. [2020-09-11 16:17:03,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 16:17:03,091 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-11 16:17:03,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:03,092 INFO L225 Difference]: With dead ends: 91 [2020-09-11 16:17:03,092 INFO L226 Difference]: Without dead ends: 85 [2020-09-11 16:17:03,093 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-09-11 16:17:03,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-11 16:17:03,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 59. [2020-09-11 16:17:03,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-11 16:17:03,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 145 transitions. [2020-09-11 16:17:03,095 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 145 transitions. Word has length 19 [2020-09-11 16:17:03,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:03,095 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 145 transitions. [2020-09-11 16:17:03,095 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:17:03,095 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 145 transitions. [2020-09-11 16:17:03,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 16:17:03,096 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:03,096 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:03,296 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:03,297 INFO L427 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:03,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:03,297 INFO L82 PathProgramCache]: Analyzing trace with hash -731783719, now seen corresponding path program 72 times [2020-09-11 16:17:03,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:03,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466962446] [2020-09-11 16:17:03,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:03,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:03,476 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:03,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466962446] [2020-09-11 16:17:03,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346301030] [2020-09-11 16:17:03,477 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:03,527 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-09-11 16:17:03,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:03,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 16:17:03,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:03,547 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:03,559 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:03,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:03,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-11 16:17:03,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709908402] [2020-09-11 16:17:03,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 16:17:03,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:03,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 16:17:03,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-09-11 16:17:03,561 INFO L87 Difference]: Start difference. First operand 59 states and 145 transitions. Second operand 16 states. [2020-09-11 16:17:03,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:03,989 INFO L93 Difference]: Finished difference Result 99 states and 225 transitions. [2020-09-11 16:17:03,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 16:17:03,989 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-11 16:17:03,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:03,991 INFO L225 Difference]: With dead ends: 99 [2020-09-11 16:17:03,991 INFO L226 Difference]: Without dead ends: 93 [2020-09-11 16:17:03,991 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=257, Invalid=673, Unknown=0, NotChecked=0, Total=930 [2020-09-11 16:17:03,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-11 16:17:03,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 58. [2020-09-11 16:17:03,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-11 16:17:03,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 143 transitions. [2020-09-11 16:17:03,995 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 143 transitions. Word has length 19 [2020-09-11 16:17:03,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:03,995 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 143 transitions. [2020-09-11 16:17:03,996 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 16:17:03,996 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 143 transitions. [2020-09-11 16:17:03,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 16:17:03,997 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:03,997 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:04,197 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:04,198 INFO L427 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:04,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:04,198 INFO L82 PathProgramCache]: Analyzing trace with hash 884408791, now seen corresponding path program 73 times [2020-09-11 16:17:04,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:04,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589267041] [2020-09-11 16:17:04,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:04,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:04,407 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:04,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589267041] [2020-09-11 16:17:04,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170376827] [2020-09-11 16:17:04,408 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:04,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:04,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 16:17:04,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:04,507 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:04,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:04,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-11 16:17:04,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060101687] [2020-09-11 16:17:04,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:17:04,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:04,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:17:04,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:17:04,510 INFO L87 Difference]: Start difference. First operand 58 states and 143 transitions. Second operand 15 states. [2020-09-11 16:17:04,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:04,944 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-09-11 16:17:04,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-11 16:17:04,945 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-11 16:17:04,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:04,945 INFO L225 Difference]: With dead ends: 99 [2020-09-11 16:17:04,946 INFO L226 Difference]: Without dead ends: 93 [2020-09-11 16:17:04,946 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-09-11 16:17:04,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-11 16:17:04,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 61. [2020-09-11 16:17:04,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-11 16:17:04,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 151 transitions. [2020-09-11 16:17:04,948 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 151 transitions. Word has length 19 [2020-09-11 16:17:04,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:04,948 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 151 transitions. [2020-09-11 16:17:04,948 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:17:04,949 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 151 transitions. [2020-09-11 16:17:04,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 16:17:04,949 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:04,949 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:05,158 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-09-11 16:17:05,158 INFO L427 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:05,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:05,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1404151867, now seen corresponding path program 74 times [2020-09-11 16:17:05,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:05,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932493959] [2020-09-11 16:17:05,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:05,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:05,346 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:05,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932493959] [2020-09-11 16:17:05,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978139534] [2020-09-11 16:17:05,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:05,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:17:05,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:05,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 16:17:05,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:05,432 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:05,444 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:05,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:05,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-11 16:17:05,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538259291] [2020-09-11 16:17:05,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 16:17:05,445 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:05,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 16:17:05,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-09-11 16:17:05,446 INFO L87 Difference]: Start difference. First operand 61 states and 151 transitions. Second operand 16 states. [2020-09-11 16:17:05,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:05,968 INFO L93 Difference]: Finished difference Result 96 states and 221 transitions. [2020-09-11 16:17:05,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 16:17:05,969 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-11 16:17:05,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:05,970 INFO L225 Difference]: With dead ends: 96 [2020-09-11 16:17:05,970 INFO L226 Difference]: Without dead ends: 90 [2020-09-11 16:17:05,971 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=286, Invalid=770, Unknown=0, NotChecked=0, Total=1056 [2020-09-11 16:17:05,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-11 16:17:05,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 60. [2020-09-11 16:17:05,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-11 16:17:05,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 149 transitions. [2020-09-11 16:17:05,973 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 149 transitions. Word has length 19 [2020-09-11 16:17:05,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:05,974 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 149 transitions. [2020-09-11 16:17:05,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 16:17:05,974 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 149 transitions. [2020-09-11 16:17:05,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 16:17:05,974 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:05,975 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:06,179 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:06,180 INFO L427 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:06,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:06,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1235504199, now seen corresponding path program 75 times [2020-09-11 16:17:06,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:06,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484239999] [2020-09-11 16:17:06,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:06,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:06,324 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:06,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484239999] [2020-09-11 16:17:06,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377323198] [2020-09-11 16:17:06,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:06,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-11 16:17:06,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:06,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 16:17:06,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:06,397 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:06,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:06,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-11 16:17:06,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536592908] [2020-09-11 16:17:06,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:17:06,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:06,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:17:06,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:17:06,399 INFO L87 Difference]: Start difference. First operand 60 states and 149 transitions. Second operand 15 states. [2020-09-11 16:17:06,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:06,900 INFO L93 Difference]: Finished difference Result 97 states and 225 transitions. [2020-09-11 16:17:06,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 16:17:06,900 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-11 16:17:06,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:06,901 INFO L225 Difference]: With dead ends: 97 [2020-09-11 16:17:06,902 INFO L226 Difference]: Without dead ends: 91 [2020-09-11 16:17:06,902 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=322, Invalid=800, Unknown=0, NotChecked=0, Total=1122 [2020-09-11 16:17:06,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-11 16:17:06,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 63. [2020-09-11 16:17:06,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-11 16:17:06,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-11 16:17:06,904 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 19 [2020-09-11 16:17:06,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:06,904 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-11 16:17:06,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:17:06,904 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-11 16:17:06,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 16:17:06,904 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:06,904 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:07,105 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-09-11 16:17:07,106 INFO L427 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:07,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:07,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1339335453, now seen corresponding path program 76 times [2020-09-11 16:17:07,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:07,107 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058115944] [2020-09-11 16:17:07,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:07,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:07,280 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:07,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058115944] [2020-09-11 16:17:07,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932343974] [2020-09-11 16:17:07,281 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:07,339 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:17:07,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:07,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 16:17:07,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:07,366 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:07,379 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:07,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:07,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-11 16:17:07,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687140583] [2020-09-11 16:17:07,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 16:17:07,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:07,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 16:17:07,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-09-11 16:17:07,381 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 16 states. [2020-09-11 16:17:08,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:08,017 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-09-11 16:17:08,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 16:17:08,018 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-11 16:17:08,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:08,019 INFO L225 Difference]: With dead ends: 94 [2020-09-11 16:17:08,020 INFO L226 Difference]: Without dead ends: 88 [2020-09-11 16:17:08,020 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=331, Invalid=859, Unknown=0, NotChecked=0, Total=1190 [2020-09-11 16:17:08,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-11 16:17:08,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 62. [2020-09-11 16:17:08,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-11 16:17:08,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-11 16:17:08,023 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 19 [2020-09-11 16:17:08,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:08,024 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-11 16:17:08,024 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 16:17:08,024 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-11 16:17:08,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 16:17:08,024 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:08,024 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:08,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:08,233 INFO L427 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:08,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:08,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1810331163, now seen corresponding path program 77 times [2020-09-11 16:17:08,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:08,235 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437832462] [2020-09-11 16:17:08,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:08,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:08,398 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:08,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437832462] [2020-09-11 16:17:08,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886627719] [2020-09-11 16:17:08,399 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:08,456 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-11 16:17:08,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:08,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 16:17:08,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:08,476 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:08,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:08,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-11 16:17:08,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904024416] [2020-09-11 16:17:08,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:17:08,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:08,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:17:08,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:17:08,477 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 15 states. [2020-09-11 16:17:09,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:09,042 INFO L93 Difference]: Finished difference Result 95 states and 223 transitions. [2020-09-11 16:17:09,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-11 16:17:09,043 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-11 16:17:09,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:09,044 INFO L225 Difference]: With dead ends: 95 [2020-09-11 16:17:09,044 INFO L226 Difference]: Without dead ends: 89 [2020-09-11 16:17:09,045 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=382, Invalid=878, Unknown=0, NotChecked=0, Total=1260 [2020-09-11 16:17:09,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-11 16:17:09,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 65. [2020-09-11 16:17:09,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-09-11 16:17:09,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 163 transitions. [2020-09-11 16:17:09,047 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 163 transitions. Word has length 19 [2020-09-11 16:17:09,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:09,048 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 163 transitions. [2020-09-11 16:17:09,048 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:17:09,048 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 163 transitions. [2020-09-11 16:17:09,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 16:17:09,048 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:09,048 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:09,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-09-11 16:17:09,259 INFO L427 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:09,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:09,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1826418303, now seen corresponding path program 78 times [2020-09-11 16:17:09,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:09,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009508353] [2020-09-11 16:17:09,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:09,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:09,424 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:09,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009508353] [2020-09-11 16:17:09,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52453996] [2020-09-11 16:17:09,424 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:09,483 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-09-11 16:17:09,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:09,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 16:17:09,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:09,509 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:09,528 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:09,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:09,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-11 16:17:09,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412523052] [2020-09-11 16:17:09,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 16:17:09,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:09,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 16:17:09,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-09-11 16:17:09,530 INFO L87 Difference]: Start difference. First operand 65 states and 163 transitions. Second operand 16 states. [2020-09-11 16:17:10,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:10,247 INFO L93 Difference]: Finished difference Result 92 states and 217 transitions. [2020-09-11 16:17:10,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 16:17:10,248 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-11 16:17:10,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:10,249 INFO L225 Difference]: With dead ends: 92 [2020-09-11 16:17:10,249 INFO L226 Difference]: Without dead ends: 86 [2020-09-11 16:17:10,249 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=392, Invalid=940, Unknown=0, NotChecked=0, Total=1332 [2020-09-11 16:17:10,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-11 16:17:10,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 64. [2020-09-11 16:17:10,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-11 16:17:10,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-09-11 16:17:10,252 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 19 [2020-09-11 16:17:10,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:10,252 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-09-11 16:17:10,252 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 16:17:10,252 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-09-11 16:17:10,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 16:17:10,253 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:10,253 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:10,461 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:10,461 INFO L427 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:10,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:10,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1826908413, now seen corresponding path program 79 times [2020-09-11 16:17:10,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:10,462 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631744021] [2020-09-11 16:17:10,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:10,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:10,625 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:10,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631744021] [2020-09-11 16:17:10,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277111914] [2020-09-11 16:17:10,626 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:10,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:10,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 16:17:10,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:10,729 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:10,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:10,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-11 16:17:10,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645523033] [2020-09-11 16:17:10,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:17:10,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:10,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:17:10,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:17:10,732 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 15 states. [2020-09-11 16:17:11,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:11,215 INFO L93 Difference]: Finished difference Result 112 states and 267 transitions. [2020-09-11 16:17:11,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-11 16:17:11,216 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-11 16:17:11,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:11,217 INFO L225 Difference]: With dead ends: 112 [2020-09-11 16:17:11,217 INFO L226 Difference]: Without dead ends: 106 [2020-09-11 16:17:11,218 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=458, Invalid=948, Unknown=0, NotChecked=0, Total=1406 [2020-09-11 16:17:11,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-09-11 16:17:11,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 70. [2020-09-11 16:17:11,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-11 16:17:11,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 181 transitions. [2020-09-11 16:17:11,221 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 181 transitions. Word has length 19 [2020-09-11 16:17:11,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:11,221 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 181 transitions. [2020-09-11 16:17:11,222 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:17:11,222 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 181 transitions. [2020-09-11 16:17:11,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 16:17:11,222 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:11,223 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:11,431 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:11,431 INFO L427 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:11,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:11,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1826925153, now seen corresponding path program 80 times [2020-09-11 16:17:11,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:11,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676830788] [2020-09-11 16:17:11,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:11,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:11,607 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:11,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676830788] [2020-09-11 16:17:11,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649661315] [2020-09-11 16:17:11,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:11,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:17:11,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:11,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 16:17:11,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:11,689 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:11,702 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:11,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:11,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-11 16:17:11,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225463600] [2020-09-11 16:17:11,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 16:17:11,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:11,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 16:17:11,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-09-11 16:17:11,704 INFO L87 Difference]: Start difference. First operand 70 states and 181 transitions. Second operand 16 states. [2020-09-11 16:17:12,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:12,410 INFO L93 Difference]: Finished difference Result 93 states and 223 transitions. [2020-09-11 16:17:12,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 16:17:12,410 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-11 16:17:12,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:12,411 INFO L225 Difference]: With dead ends: 93 [2020-09-11 16:17:12,412 INFO L226 Difference]: Without dead ends: 85 [2020-09-11 16:17:12,412 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=469, Invalid=1013, Unknown=0, NotChecked=0, Total=1482 [2020-09-11 16:17:12,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-11 16:17:12,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 67. [2020-09-11 16:17:12,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-11 16:17:12,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 169 transitions. [2020-09-11 16:17:12,415 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 169 transitions. Word has length 19 [2020-09-11 16:17:12,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:12,415 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 169 transitions. [2020-09-11 16:17:12,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 16:17:12,415 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 169 transitions. [2020-09-11 16:17:12,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 16:17:12,416 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:12,416 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:12,616 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:12,617 INFO L427 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:12,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:12,617 INFO L82 PathProgramCache]: Analyzing trace with hash 846490750, now seen corresponding path program 81 times [2020-09-11 16:17:12,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:12,618 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268304011] [2020-09-11 16:17:12,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:12,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:12,837 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:12,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268304011] [2020-09-11 16:17:12,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522137230] [2020-09-11 16:17:12,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:12,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-11 16:17:12,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:12,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 16:17:12,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:12,911 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:12,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:12,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-11 16:17:12,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052893390] [2020-09-11 16:17:12,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 16:17:12,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:12,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 16:17:12,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-09-11 16:17:12,912 INFO L87 Difference]: Start difference. First operand 67 states and 169 transitions. Second operand 16 states. [2020-09-11 16:17:13,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:13,272 INFO L93 Difference]: Finished difference Result 104 states and 243 transitions. [2020-09-11 16:17:13,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-11 16:17:13,273 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-11 16:17:13,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:13,274 INFO L225 Difference]: With dead ends: 104 [2020-09-11 16:17:13,274 INFO L226 Difference]: Without dead ends: 98 [2020-09-11 16:17:13,275 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=247, Invalid=565, Unknown=0, NotChecked=0, Total=812 [2020-09-11 16:17:13,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-11 16:17:13,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 69. [2020-09-11 16:17:13,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-11 16:17:13,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-11 16:17:13,278 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-09-11 16:17:13,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:13,278 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-11 16:17:13,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 16:17:13,279 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-11 16:17:13,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 16:17:13,279 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:13,279 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:13,480 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:13,480 INFO L427 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:13,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:13,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1831682274, now seen corresponding path program 82 times [2020-09-11 16:17:13,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:13,482 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497554488] [2020-09-11 16:17:13,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:13,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:13,675 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:13,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497554488] [2020-09-11 16:17:13,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156896723] [2020-09-11 16:17:13,676 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:13,731 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:17:13,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:13,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 16:17:13,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:13,754 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:13,768 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:13,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:13,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-11 16:17:13,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853295736] [2020-09-11 16:17:13,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:17:13,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:13,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:17:13,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:17:13,769 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-09-11 16:17:14,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:14,233 INFO L93 Difference]: Finished difference Result 101 states and 237 transitions. [2020-09-11 16:17:14,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 16:17:14,233 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-11 16:17:14,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:14,234 INFO L225 Difference]: With dead ends: 101 [2020-09-11 16:17:14,234 INFO L226 Difference]: Without dead ends: 95 [2020-09-11 16:17:14,234 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=285, Invalid=707, Unknown=0, NotChecked=0, Total=992 [2020-09-11 16:17:14,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-11 16:17:14,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 68. [2020-09-11 16:17:14,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-11 16:17:14,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-11 16:17:14,236 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-09-11 16:17:14,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:14,237 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-11 16:17:14,237 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:17:14,237 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-11 16:17:14,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 16:17:14,238 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:14,238 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:14,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:14,446 INFO L427 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:14,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:14,447 INFO L82 PathProgramCache]: Analyzing trace with hash 214523232, now seen corresponding path program 83 times [2020-09-11 16:17:14,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:14,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657289833] [2020-09-11 16:17:14,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:14,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:14,646 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:14,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657289833] [2020-09-11 16:17:14,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934056892] [2020-09-11 16:17:14,647 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:14,726 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-11 16:17:14,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:14,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 16:17:14,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:14,752 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:14,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:14,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-11 16:17:14,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259035527] [2020-09-11 16:17:14,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 16:17:14,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:14,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 16:17:14,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-09-11 16:17:14,755 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-09-11 16:17:15,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:15,199 INFO L93 Difference]: Finished difference Result 98 states and 231 transitions. [2020-09-11 16:17:15,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 16:17:15,199 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-11 16:17:15,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:15,201 INFO L225 Difference]: With dead ends: 98 [2020-09-11 16:17:15,201 INFO L226 Difference]: Without dead ends: 92 [2020-09-11 16:17:15,201 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=260, Invalid=670, Unknown=0, NotChecked=0, Total=930 [2020-09-11 16:17:15,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-11 16:17:15,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 69. [2020-09-11 16:17:15,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-11 16:17:15,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-11 16:17:15,208 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-09-11 16:17:15,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:15,209 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-11 16:17:15,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 16:17:15,210 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-11 16:17:15,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 16:17:15,211 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:15,211 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:15,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:15,424 INFO L427 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:15,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:15,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1471412932, now seen corresponding path program 84 times [2020-09-11 16:17:15,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:15,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751075188] [2020-09-11 16:17:15,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:15,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:15,692 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:15,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751075188] [2020-09-11 16:17:15,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349149567] [2020-09-11 16:17:15,693 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:15,778 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-09-11 16:17:15,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:15,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 16:17:15,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:15,810 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:15,829 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:15,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:15,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-11 16:17:15,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593765760] [2020-09-11 16:17:15,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:17:15,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:15,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:17:15,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:17:15,834 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-09-11 16:17:16,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:16,474 INFO L93 Difference]: Finished difference Result 97 states and 229 transitions. [2020-09-11 16:17:16,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 16:17:16,475 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-11 16:17:16,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:16,476 INFO L225 Difference]: With dead ends: 97 [2020-09-11 16:17:16,477 INFO L226 Difference]: Without dead ends: 91 [2020-09-11 16:17:16,477 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2020-09-11 16:17:16,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-11 16:17:16,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 68. [2020-09-11 16:17:16,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-11 16:17:16,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-11 16:17:16,485 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-09-11 16:17:16,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:16,485 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-11 16:17:16,485 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:17:16,485 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-11 16:17:16,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 16:17:16,486 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:16,486 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:16,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:16,699 INFO L427 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:16,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:16,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1207361854, now seen corresponding path program 85 times [2020-09-11 16:17:16,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:16,700 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102758866] [2020-09-11 16:17:16,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:16,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:16,943 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:16,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102758866] [2020-09-11 16:17:16,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082323347] [2020-09-11 16:17:16,944 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:17,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:17,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 16:17:17,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:17,045 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:17,048 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:17,048 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-11 16:17:17,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553443916] [2020-09-11 16:17:17,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 16:17:17,049 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:17,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 16:17:17,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-09-11 16:17:17,050 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-09-11 16:17:17,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:17,562 INFO L93 Difference]: Finished difference Result 94 states and 223 transitions. [2020-09-11 16:17:17,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-11 16:17:17,562 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-11 16:17:17,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:17,563 INFO L225 Difference]: With dead ends: 94 [2020-09-11 16:17:17,563 INFO L226 Difference]: Without dead ends: 88 [2020-09-11 16:17:17,564 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=289, Invalid=767, Unknown=0, NotChecked=0, Total=1056 [2020-09-11 16:17:17,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-11 16:17:17,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 69. [2020-09-11 16:17:17,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-11 16:17:17,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-11 16:17:17,566 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-09-11 16:17:17,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:17,566 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-11 16:17:17,566 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 16:17:17,566 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-11 16:17:17,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 16:17:17,567 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:17,567 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:17,775 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2020-09-11 16:17:17,775 INFO L427 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:17,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:17,776 INFO L82 PathProgramCache]: Analyzing trace with hash -687618778, now seen corresponding path program 86 times [2020-09-11 16:17:17,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:17,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282205909] [2020-09-11 16:17:17,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:17,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:17,964 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:17,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282205909] [2020-09-11 16:17:17,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709502309] [2020-09-11 16:17:17,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:18,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:17:18,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:18,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 16:17:18,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:18,047 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:18,060 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:18,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:18,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-11 16:17:18,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016631912] [2020-09-11 16:17:18,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:17:18,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:18,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:17:18,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:17:18,062 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-09-11 16:17:18,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:18,731 INFO L93 Difference]: Finished difference Result 93 states and 221 transitions. [2020-09-11 16:17:18,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 16:17:18,732 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-11 16:17:18,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:18,733 INFO L225 Difference]: With dead ends: 93 [2020-09-11 16:17:18,733 INFO L226 Difference]: Without dead ends: 87 [2020-09-11 16:17:18,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=341, Invalid=919, Unknown=0, NotChecked=0, Total=1260 [2020-09-11 16:17:18,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-09-11 16:17:18,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 68. [2020-09-11 16:17:18,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-11 16:17:18,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-11 16:17:18,735 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-09-11 16:17:18,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:18,736 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-11 16:17:18,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:17:18,736 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-11 16:17:18,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 16:17:18,736 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:18,737 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:18,945 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:18,945 INFO L427 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:18,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:18,946 INFO L82 PathProgramCache]: Analyzing trace with hash 967692452, now seen corresponding path program 87 times [2020-09-11 16:17:18,946 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:18,946 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075513697] [2020-09-11 16:17:18,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:18,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:19,105 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:19,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075513697] [2020-09-11 16:17:19,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050080199] [2020-09-11 16:17:19,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:19,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-11 16:17:19,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:19,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 16:17:19,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:19,219 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:19,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:19,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-11 16:17:19,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798574849] [2020-09-11 16:17:19,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 16:17:19,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:19,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 16:17:19,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-09-11 16:17:19,222 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-09-11 16:17:19,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:19,830 INFO L93 Difference]: Finished difference Result 90 states and 215 transitions. [2020-09-11 16:17:19,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 16:17:19,831 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-11 16:17:19,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:19,832 INFO L225 Difference]: With dead ends: 90 [2020-09-11 16:17:19,832 INFO L226 Difference]: Without dead ends: 84 [2020-09-11 16:17:19,833 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=334, Invalid=856, Unknown=0, NotChecked=0, Total=1190 [2020-09-11 16:17:19,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-11 16:17:19,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 69. [2020-09-11 16:17:19,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-11 16:17:19,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-11 16:17:19,836 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-09-11 16:17:19,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:19,836 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-11 16:17:19,837 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 16:17:19,837 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-11 16:17:19,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 16:17:19,837 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:19,838 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:20,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2020-09-11 16:17:20,048 INFO L427 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:20,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:20,049 INFO L82 PathProgramCache]: Analyzing trace with hash -752435192, now seen corresponding path program 88 times [2020-09-11 16:17:20,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:20,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289464422] [2020-09-11 16:17:20,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:20,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:20,264 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:20,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289464422] [2020-09-11 16:17:20,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870243129] [2020-09-11 16:17:20,265 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:20,332 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:17:20,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:20,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 16:17:20,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:20,355 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:20,370 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:20,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:20,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-11 16:17:20,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120009] [2020-09-11 16:17:20,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:17:20,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:20,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:17:20,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:17:20,372 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-09-11 16:17:21,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:21,206 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-09-11 16:17:21,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 16:17:21,207 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-11 16:17:21,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:21,208 INFO L225 Difference]: With dead ends: 89 [2020-09-11 16:17:21,208 INFO L226 Difference]: Without dead ends: 83 [2020-09-11 16:17:21,209 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=393, Invalid=1013, Unknown=0, NotChecked=0, Total=1406 [2020-09-11 16:17:21,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-11 16:17:21,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 68. [2020-09-11 16:17:21,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-11 16:17:21,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-11 16:17:21,212 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-09-11 16:17:21,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:21,213 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-11 16:17:21,213 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:17:21,213 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-11 16:17:21,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 16:17:21,214 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:21,214 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:21,425 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:21,425 INFO L427 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:21,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:21,426 INFO L82 PathProgramCache]: Analyzing trace with hash -281439482, now seen corresponding path program 89 times [2020-09-11 16:17:21,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:21,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510451550] [2020-09-11 16:17:21,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:21,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:21,650 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:21,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510451550] [2020-09-11 16:17:21,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773804774] [2020-09-11 16:17:21,651 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:21,733 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-11 16:17:21,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:21,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 16:17:21,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:21,761 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:21,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:21,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-11 16:17:21,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959687075] [2020-09-11 16:17:21,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 16:17:21,763 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:21,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 16:17:21,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-09-11 16:17:21,764 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-09-11 16:17:22,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:22,386 INFO L93 Difference]: Finished difference Result 86 states and 207 transitions. [2020-09-11 16:17:22,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-11 16:17:22,387 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-11 16:17:22,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:22,387 INFO L225 Difference]: With dead ends: 86 [2020-09-11 16:17:22,388 INFO L226 Difference]: Without dead ends: 80 [2020-09-11 16:17:22,388 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=395, Invalid=937, Unknown=0, NotChecked=0, Total=1332 [2020-09-11 16:17:22,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-11 16:17:22,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 69. [2020-09-11 16:17:22,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-11 16:17:22,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-11 16:17:22,390 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-09-11 16:17:22,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:22,391 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-11 16:17:22,391 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 16:17:22,391 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-11 16:17:22,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 16:17:22,391 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:22,391 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:22,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:22,601 INFO L427 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:22,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:22,601 INFO L82 PathProgramCache]: Analyzing trace with hash -265352342, now seen corresponding path program 90 times [2020-09-11 16:17:22,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:22,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978829332] [2020-09-11 16:17:22,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:22,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:22,782 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:22,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978829332] [2020-09-11 16:17:22,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610000051] [2020-09-11 16:17:22,783 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:22,859 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-09-11 16:17:22,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:22,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 16:17:22,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:22,889 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:22,906 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:22,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:22,907 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-11 16:17:22,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292877272] [2020-09-11 16:17:22,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:17:22,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:22,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:17:22,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:17:22,908 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-09-11 16:17:23,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:23,675 INFO L93 Difference]: Finished difference Result 85 states and 205 transitions. [2020-09-11 16:17:23,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 16:17:23,676 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-11 16:17:23,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:23,676 INFO L225 Difference]: With dead ends: 85 [2020-09-11 16:17:23,677 INFO L226 Difference]: Without dead ends: 79 [2020-09-11 16:17:23,677 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=461, Invalid=1099, Unknown=0, NotChecked=0, Total=1560 [2020-09-11 16:17:23,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-11 16:17:23,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 68. [2020-09-11 16:17:23,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-11 16:17:23,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-11 16:17:23,679 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-09-11 16:17:23,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:23,680 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-11 16:17:23,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:17:23,680 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-11 16:17:23,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 16:17:23,680 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:23,681 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:23,888 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:23,888 INFO L427 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:23,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:23,889 INFO L82 PathProgramCache]: Analyzing trace with hash -264862232, now seen corresponding path program 91 times [2020-09-11 16:17:23,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:23,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954290334] [2020-09-11 16:17:23,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:23,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:24,037 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:24,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954290334] [2020-09-11 16:17:24,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785370735] [2020-09-11 16:17:24,038 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:24,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:24,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 16:17:24,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:24,101 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:24,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:24,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-11 16:17:24,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273211936] [2020-09-11 16:17:24,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 16:17:24,103 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:24,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 16:17:24,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-09-11 16:17:24,104 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-09-11 16:17:24,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:24,760 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-09-11 16:17:24,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-11 16:17:24,760 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-11 16:17:24,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:24,761 INFO L225 Difference]: With dead ends: 101 [2020-09-11 16:17:24,761 INFO L226 Difference]: Without dead ends: 95 [2020-09-11 16:17:24,762 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=472, Invalid=1010, Unknown=0, NotChecked=0, Total=1482 [2020-09-11 16:17:24,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-11 16:17:24,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 72. [2020-09-11 16:17:24,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-11 16:17:24,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 185 transitions. [2020-09-11 16:17:24,765 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 185 transitions. Word has length 20 [2020-09-11 16:17:24,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:24,765 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 185 transitions. [2020-09-11 16:17:24,765 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 16:17:24,765 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 185 transitions. [2020-09-11 16:17:24,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 16:17:24,766 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:24,766 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:24,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:24,976 INFO L427 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:24,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:24,977 INFO L82 PathProgramCache]: Analyzing trace with hash -264845492, now seen corresponding path program 92 times [2020-09-11 16:17:24,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:24,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484986483] [2020-09-11 16:17:24,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:24,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:25,141 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:25,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484986483] [2020-09-11 16:17:25,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383130270] [2020-09-11 16:17:25,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:25,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:17:25,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:25,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 16:17:25,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:25,254 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:25,271 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:25,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:25,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-11 16:17:25,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970040878] [2020-09-11 16:17:25,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:17:25,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:25,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:17:25,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:17:25,273 INFO L87 Difference]: Start difference. First operand 72 states and 185 transitions. Second operand 17 states. [2020-09-11 16:17:26,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:26,120 INFO L93 Difference]: Finished difference Result 82 states and 201 transitions. [2020-09-11 16:17:26,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-11 16:17:26,121 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-11 16:17:26,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:26,121 INFO L225 Difference]: With dead ends: 82 [2020-09-11 16:17:26,122 INFO L226 Difference]: Without dead ends: 74 [2020-09-11 16:17:26,122 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=545, Invalid=1177, Unknown=0, NotChecked=0, Total=1722 [2020-09-11 16:17:26,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-09-11 16:17:26,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 53. [2020-09-11 16:17:26,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-11 16:17:26,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 128 transitions. [2020-09-11 16:17:26,124 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 128 transitions. Word has length 20 [2020-09-11 16:17:26,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:26,125 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 128 transitions. [2020-09-11 16:17:26,125 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:17:26,125 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 128 transitions. [2020-09-11 16:17:26,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 16:17:26,125 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:26,125 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:26,333 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:26,333 INFO L427 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:26,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:26,333 INFO L82 PathProgramCache]: Analyzing trace with hash 800121202, now seen corresponding path program 93 times [2020-09-11 16:17:26,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:26,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739512138] [2020-09-11 16:17:26,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:26,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:26,507 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:26,507 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739512138] [2020-09-11 16:17:26,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850754839] [2020-09-11 16:17:26,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:26,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-11 16:17:26,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:26,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 16:17:26,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:26,596 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:17:26,610 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:26,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:26,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-11 16:17:26,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242540703] [2020-09-11 16:17:26,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:17:26,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:26,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:17:26,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:17:26,612 INFO L87 Difference]: Start difference. First operand 53 states and 128 transitions. Second operand 17 states. [2020-09-11 16:17:27,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:27,430 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-09-11 16:17:27,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-11 16:17:27,431 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-11 16:17:27,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:27,432 INFO L225 Difference]: With dead ends: 92 [2020-09-11 16:17:27,432 INFO L226 Difference]: Without dead ends: 87 [2020-09-11 16:17:27,432 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=574, Invalid=1148, Unknown=0, NotChecked=0, Total=1722 [2020-09-11 16:17:27,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-09-11 16:17:27,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 70. [2020-09-11 16:17:27,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-11 16:17:27,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-09-11 16:17:27,435 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 20 [2020-09-11 16:17:27,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:27,435 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-09-11 16:17:27,435 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:17:27,435 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-09-11 16:17:27,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 16:17:27,435 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:27,436 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:27,636 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:27,636 INFO L427 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:27,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:27,637 INFO L82 PathProgramCache]: Analyzing trace with hash 379740647, now seen corresponding path program 94 times [2020-09-11 16:17:27,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:27,638 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392815486] [2020-09-11 16:17:27,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:27,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:27,800 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:27,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392815486] [2020-09-11 16:17:27,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654116854] [2020-09-11 16:17:27,801 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:27,876 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:17:27,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:27,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 16:17:27,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:27,915 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:17:27,936 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:27,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:27,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-11 16:17:27,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926561554] [2020-09-11 16:17:27,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 16:17:27,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:27,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 16:17:27,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:17:27,939 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 18 states. [2020-09-11 16:17:28,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:28,877 INFO L93 Difference]: Finished difference Result 78 states and 197 transitions. [2020-09-11 16:17:28,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-11 16:17:28,878 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-11 16:17:28,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:28,878 INFO L225 Difference]: With dead ends: 78 [2020-09-11 16:17:28,879 INFO L226 Difference]: Without dead ends: 73 [2020-09-11 16:17:28,879 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=589, Invalid=1217, Unknown=0, NotChecked=0, Total=1806 [2020-09-11 16:17:28,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-11 16:17:28,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 54. [2020-09-11 16:17:28,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-11 16:17:28,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 132 transitions. [2020-09-11 16:17:28,882 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 132 transitions. Word has length 21 [2020-09-11 16:17:28,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:28,882 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 132 transitions. [2020-09-11 16:17:28,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 16:17:28,882 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 132 transitions. [2020-09-11 16:17:28,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 16:17:28,882 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:28,883 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:29,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2020-09-11 16:17:29,092 INFO L427 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:29,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:29,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1875703058, now seen corresponding path program 95 times [2020-09-11 16:17:29,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:29,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353772051] [2020-09-11 16:17:29,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:29,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:29,346 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:29,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353772051] [2020-09-11 16:17:29,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791540189] [2020-09-11 16:17:29,347 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:29,409 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-11 16:17:29,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:29,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 16:17:29,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:29,427 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:29,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:29,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-11 16:17:29,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274287256] [2020-09-11 16:17:29,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:17:29,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:29,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:17:29,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:17:29,429 INFO L87 Difference]: Start difference. First operand 54 states and 132 transitions. Second operand 17 states. [2020-09-11 16:17:29,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:29,782 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-09-11 16:17:29,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-11 16:17:29,783 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-11 16:17:29,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:29,784 INFO L225 Difference]: With dead ends: 84 [2020-09-11 16:17:29,784 INFO L226 Difference]: Without dead ends: 78 [2020-09-11 16:17:29,785 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2020-09-11 16:17:29,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-11 16:17:29,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 62. [2020-09-11 16:17:29,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-11 16:17:29,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 151 transitions. [2020-09-11 16:17:29,787 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 151 transitions. Word has length 21 [2020-09-11 16:17:29,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:29,787 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 151 transitions. [2020-09-11 16:17:29,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:17:29,787 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 151 transitions. [2020-09-11 16:17:29,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 16:17:29,788 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:29,788 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:29,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:29,989 INFO L427 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:29,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:29,989 INFO L82 PathProgramCache]: Analyzing trace with hash -543014794, now seen corresponding path program 96 times [2020-09-11 16:17:29,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:29,990 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568847496] [2020-09-11 16:17:29,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:29,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:30,245 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:30,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568847496] [2020-09-11 16:17:30,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474799713] [2020-09-11 16:17:30,245 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:30,306 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-11 16:17:30,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:30,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 16:17:30,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:30,330 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:30,343 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:30,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:30,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-11 16:17:30,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716394399] [2020-09-11 16:17:30,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 16:17:30,344 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:30,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 16:17:30,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:17:30,344 INFO L87 Difference]: Start difference. First operand 62 states and 151 transitions. Second operand 18 states. [2020-09-11 16:17:30,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:30,789 INFO L93 Difference]: Finished difference Result 98 states and 223 transitions. [2020-09-11 16:17:30,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 16:17:30,790 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-11 16:17:30,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:30,791 INFO L225 Difference]: With dead ends: 98 [2020-09-11 16:17:30,792 INFO L226 Difference]: Without dead ends: 92 [2020-09-11 16:17:30,792 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=292, Invalid=700, Unknown=0, NotChecked=0, Total=992 [2020-09-11 16:17:30,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-11 16:17:30,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2020-09-11 16:17:30,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-11 16:17:30,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 147 transitions. [2020-09-11 16:17:30,795 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 147 transitions. Word has length 21 [2020-09-11 16:17:30,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:30,795 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 147 transitions. [2020-09-11 16:17:30,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 16:17:30,795 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 147 transitions. [2020-09-11 16:17:30,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 16:17:30,796 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:30,796 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:31,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2020-09-11 16:17:31,006 INFO L427 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:31,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:31,007 INFO L82 PathProgramCache]: Analyzing trace with hash 145306996, now seen corresponding path program 97 times [2020-09-11 16:17:31,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:31,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505441490] [2020-09-11 16:17:31,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:31,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:31,255 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:31,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505441490] [2020-09-11 16:17:31,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505940994] [2020-09-11 16:17:31,256 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:31,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:31,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 16:17:31,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:31,330 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:31,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:31,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-11 16:17:31,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451093013] [2020-09-11 16:17:31,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:17:31,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:31,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:17:31,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:17:31,331 INFO L87 Difference]: Start difference. First operand 60 states and 147 transitions. Second operand 17 states. [2020-09-11 16:17:31,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:31,809 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-09-11 16:17:31,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-11 16:17:31,810 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-11 16:17:31,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:31,811 INFO L225 Difference]: With dead ends: 99 [2020-09-11 16:17:31,811 INFO L226 Difference]: Without dead ends: 93 [2020-09-11 16:17:31,812 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=298, Invalid=758, Unknown=0, NotChecked=0, Total=1056 [2020-09-11 16:17:31,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-11 16:17:31,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 63. [2020-09-11 16:17:31,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-11 16:17:31,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 155 transitions. [2020-09-11 16:17:31,815 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 155 transitions. Word has length 21 [2020-09-11 16:17:31,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:31,815 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 155 transitions. [2020-09-11 16:17:31,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:17:31,815 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 155 transitions. [2020-09-11 16:17:31,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 16:17:31,816 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:31,816 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:32,016 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:32,017 INFO L427 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:32,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:32,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1130498520, now seen corresponding path program 98 times [2020-09-11 16:17:32,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:32,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645619259] [2020-09-11 16:17:32,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:32,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:32,267 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:32,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645619259] [2020-09-11 16:17:32,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144259509] [2020-09-11 16:17:32,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:32,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:17:32,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:32,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 16:17:32,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:32,355 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:32,370 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:32,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:32,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-11 16:17:32,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857029486] [2020-09-11 16:17:32,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 16:17:32,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:32,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 16:17:32,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:17:32,372 INFO L87 Difference]: Start difference. First operand 63 states and 155 transitions. Second operand 18 states. [2020-09-11 16:17:32,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:32,895 INFO L93 Difference]: Finished difference Result 109 states and 247 transitions. [2020-09-11 16:17:32,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 16:17:32,896 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-11 16:17:32,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:32,897 INFO L225 Difference]: With dead ends: 109 [2020-09-11 16:17:32,897 INFO L226 Difference]: Without dead ends: 103 [2020-09-11 16:17:32,897 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=328, Invalid=862, Unknown=0, NotChecked=0, Total=1190 [2020-09-11 16:17:32,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-11 16:17:32,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 62. [2020-09-11 16:17:32,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-11 16:17:32,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 153 transitions. [2020-09-11 16:17:32,903 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 153 transitions. Word has length 21 [2020-09-11 16:17:32,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:32,903 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 153 transitions. [2020-09-11 16:17:32,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 16:17:32,903 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 153 transitions. [2020-09-11 16:17:32,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 16:17:32,903 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:32,904 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:33,112 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:33,112 INFO L427 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:33,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:33,112 INFO L82 PathProgramCache]: Analyzing trace with hash -486660522, now seen corresponding path program 99 times [2020-09-11 16:17:33,113 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:33,113 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817263434] [2020-09-11 16:17:33,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:33,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:33,318 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:33,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817263434] [2020-09-11 16:17:33,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202647313] [2020-09-11 16:17:33,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:33,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-11 16:17:33,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:33,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 16:17:33,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:33,402 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:33,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:33,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-11 16:17:33,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555103821] [2020-09-11 16:17:33,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:17:33,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:33,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:17:33,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:17:33,404 INFO L87 Difference]: Start difference. First operand 62 states and 153 transitions. Second operand 17 states. [2020-09-11 16:17:33,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:33,919 INFO L93 Difference]: Finished difference Result 109 states and 249 transitions. [2020-09-11 16:17:33,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 16:17:33,920 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-11 16:17:33,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:33,921 INFO L225 Difference]: With dead ends: 109 [2020-09-11 16:17:33,921 INFO L226 Difference]: Without dead ends: 103 [2020-09-11 16:17:33,922 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=348, Invalid=912, Unknown=0, NotChecked=0, Total=1260 [2020-09-11 16:17:33,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-11 16:17:33,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 65. [2020-09-11 16:17:33,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-09-11 16:17:33,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 161 transitions. [2020-09-11 16:17:33,935 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 161 transitions. Word has length 21 [2020-09-11 16:17:33,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:33,936 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 161 transitions. [2020-09-11 16:17:33,936 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:17:33,936 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 161 transitions. [2020-09-11 16:17:33,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 16:17:33,937 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:33,937 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:34,137 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2020-09-11 16:17:34,137 INFO L427 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:34,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:34,138 INFO L82 PathProgramCache]: Analyzing trace with hash 770229178, now seen corresponding path program 100 times [2020-09-11 16:17:34,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:34,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247367035] [2020-09-11 16:17:34,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:34,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:34,419 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:34,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247367035] [2020-09-11 16:17:34,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744169211] [2020-09-11 16:17:34,420 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:34,500 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:17:34,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:34,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 16:17:34,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:34,534 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:34,548 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:34,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:34,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-11 16:17:34,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775486942] [2020-09-11 16:17:34,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 16:17:34,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:34,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 16:17:34,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:17:34,550 INFO L87 Difference]: Start difference. First operand 65 states and 161 transitions. Second operand 18 states. [2020-09-11 16:17:35,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:35,171 INFO L93 Difference]: Finished difference Result 106 states and 243 transitions. [2020-09-11 16:17:35,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 16:17:35,172 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-11 16:17:35,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:35,173 INFO L225 Difference]: With dead ends: 106 [2020-09-11 16:17:35,173 INFO L226 Difference]: Without dead ends: 100 [2020-09-11 16:17:35,173 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=355, Invalid=977, Unknown=0, NotChecked=0, Total=1332 [2020-09-11 16:17:35,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-11 16:17:35,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-09-11 16:17:35,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-11 16:17:35,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 159 transitions. [2020-09-11 16:17:35,175 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 159 transitions. Word has length 21 [2020-09-11 16:17:35,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:35,176 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 159 transitions. [2020-09-11 16:17:35,176 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 16:17:35,176 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 159 transitions. [2020-09-11 16:17:35,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 16:17:35,176 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:35,177 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:35,378 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-09-11 16:17:35,378 INFO L427 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:35,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:35,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1908545608, now seen corresponding path program 101 times [2020-09-11 16:17:35,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:35,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421992684] [2020-09-11 16:17:35,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:35,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:35,598 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:35,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421992684] [2020-09-11 16:17:35,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858956464] [2020-09-11 16:17:35,599 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:35,666 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-11 16:17:35,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:35,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 16:17:35,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:35,686 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:35,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:35,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-11 16:17:35,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324713014] [2020-09-11 16:17:35,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:17:35,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:35,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:17:35,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:17:35,688 INFO L87 Difference]: Start difference. First operand 64 states and 159 transitions. Second operand 17 states. [2020-09-11 16:17:36,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:36,301 INFO L93 Difference]: Finished difference Result 107 states and 247 transitions. [2020-09-11 16:17:36,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-11 16:17:36,303 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-11 16:17:36,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:36,304 INFO L225 Difference]: With dead ends: 107 [2020-09-11 16:17:36,304 INFO L226 Difference]: Without dead ends: 101 [2020-09-11 16:17:36,305 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=390, Invalid=1016, Unknown=0, NotChecked=0, Total=1406 [2020-09-11 16:17:36,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-11 16:17:36,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-09-11 16:17:36,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-11 16:17:36,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 167 transitions. [2020-09-11 16:17:36,306 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 167 transitions. Word has length 21 [2020-09-11 16:17:36,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:36,307 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 167 transitions. [2020-09-11 16:17:36,307 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:17:36,307 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 167 transitions. [2020-09-11 16:17:36,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 16:17:36,307 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:36,307 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:36,510 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:36,511 INFO L427 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:36,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:36,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1388802532, now seen corresponding path program 102 times [2020-09-11 16:17:36,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:36,512 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191226311] [2020-09-11 16:17:36,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:36,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:36,734 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:36,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191226311] [2020-09-11 16:17:36,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709552961] [2020-09-11 16:17:36,735 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:36,797 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-11 16:17:36,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:36,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 16:17:36,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:36,827 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:36,842 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:36,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:36,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-11 16:17:36,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592411204] [2020-09-11 16:17:36,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 16:17:36,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:36,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 16:17:36,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:17:36,843 INFO L87 Difference]: Start difference. First operand 67 states and 167 transitions. Second operand 18 states. [2020-09-11 16:17:37,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:37,582 INFO L93 Difference]: Finished difference Result 104 states and 241 transitions. [2020-09-11 16:17:37,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 16:17:37,583 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-11 16:17:37,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:37,584 INFO L225 Difference]: With dead ends: 104 [2020-09-11 16:17:37,584 INFO L226 Difference]: Without dead ends: 98 [2020-09-11 16:17:37,584 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=398, Invalid=1084, Unknown=0, NotChecked=0, Total=1482 [2020-09-11 16:17:37,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-11 16:17:37,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 66. [2020-09-11 16:17:37,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-11 16:17:37,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 165 transitions. [2020-09-11 16:17:37,587 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 165 transitions. Word has length 21 [2020-09-11 16:17:37,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:37,588 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 165 transitions. [2020-09-11 16:17:37,588 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 16:17:37,588 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 165 transitions. [2020-09-11 16:17:37,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 16:17:37,588 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:37,588 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:37,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-09-11 16:17:37,796 INFO L427 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:37,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:37,797 INFO L82 PathProgramCache]: Analyzing trace with hash 266508698, now seen corresponding path program 103 times [2020-09-11 16:17:37,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:37,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878600089] [2020-09-11 16:17:37,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:37,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:38,007 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:38,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878600089] [2020-09-11 16:17:38,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059961488] [2020-09-11 16:17:38,008 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:38,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:38,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 16:17:38,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:38,087 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:38,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:38,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-11 16:17:38,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170192650] [2020-09-11 16:17:38,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:17:38,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:38,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:17:38,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:17:38,089 INFO L87 Difference]: Start difference. First operand 66 states and 165 transitions. Second operand 17 states. [2020-09-11 16:17:38,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:38,722 INFO L93 Difference]: Finished difference Result 105 states and 245 transitions. [2020-09-11 16:17:38,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-11 16:17:38,723 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-11 16:17:38,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:38,724 INFO L225 Difference]: With dead ends: 105 [2020-09-11 16:17:38,724 INFO L226 Difference]: Without dead ends: 99 [2020-09-11 16:17:38,725 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=448, Invalid=1112, Unknown=0, NotChecked=0, Total=1560 [2020-09-11 16:17:38,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-09-11 16:17:38,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 69. [2020-09-11 16:17:38,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-11 16:17:38,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-11 16:17:38,728 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 21 [2020-09-11 16:17:38,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:38,728 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-11 16:17:38,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:17:38,728 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-11 16:17:38,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 16:17:38,729 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:38,729 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:38,932 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:38,932 INFO L427 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:38,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:38,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1453618946, now seen corresponding path program 104 times [2020-09-11 16:17:38,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:38,934 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135359969] [2020-09-11 16:17:38,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:38,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:39,131 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:39,132 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135359969] [2020-09-11 16:17:39,132 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502560672] [2020-09-11 16:17:39,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:39,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:17:39,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:39,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 16:17:39,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:39,226 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:39,239 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:39,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:39,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-11 16:17:39,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024925968] [2020-09-11 16:17:39,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 16:17:39,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:39,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 16:17:39,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:17:39,241 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 18 states. [2020-09-11 16:17:40,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:40,019 INFO L93 Difference]: Finished difference Result 102 states and 239 transitions. [2020-09-11 16:17:40,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 16:17:40,020 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-11 16:17:40,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:40,021 INFO L225 Difference]: With dead ends: 102 [2020-09-11 16:17:40,021 INFO L226 Difference]: Without dead ends: 96 [2020-09-11 16:17:40,022 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=457, Invalid=1183, Unknown=0, NotChecked=0, Total=1640 [2020-09-11 16:17:40,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-11 16:17:40,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 68. [2020-09-11 16:17:40,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-11 16:17:40,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-11 16:17:40,025 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 21 [2020-09-11 16:17:40,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:40,025 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-11 16:17:40,025 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 16:17:40,025 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-11 16:17:40,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 16:17:40,025 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:40,026 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:40,228 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2020-09-11 16:17:40,228 INFO L427 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:40,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:40,229 INFO L82 PathProgramCache]: Analyzing trace with hash -982623236, now seen corresponding path program 105 times [2020-09-11 16:17:40,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:40,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321670534] [2020-09-11 16:17:40,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:40,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:40,434 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:40,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321670534] [2020-09-11 16:17:40,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792432853] [2020-09-11 16:17:40,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:40,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-11 16:17:40,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:40,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 16:17:40,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:40,523 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:40,524 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:40,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-11 16:17:40,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031213460] [2020-09-11 16:17:40,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:17:40,524 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:40,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:17:40,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:17:40,525 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 17 states. [2020-09-11 16:17:41,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:41,258 INFO L93 Difference]: Finished difference Result 103 states and 243 transitions. [2020-09-11 16:17:41,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-11 16:17:41,258 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-11 16:17:41,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:41,259 INFO L225 Difference]: With dead ends: 103 [2020-09-11 16:17:41,260 INFO L226 Difference]: Without dead ends: 97 [2020-09-11 16:17:41,260 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=522, Invalid=1200, Unknown=0, NotChecked=0, Total=1722 [2020-09-11 16:17:41,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-11 16:17:41,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 71. [2020-09-11 16:17:41,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-11 16:17:41,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 179 transitions. [2020-09-11 16:17:41,262 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 179 transitions. Word has length 21 [2020-09-11 16:17:41,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:41,263 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 179 transitions. [2020-09-11 16:17:41,264 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:17:41,264 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 179 transitions. [2020-09-11 16:17:41,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 16:17:41,264 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:41,264 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:41,472 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:41,472 INFO L427 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:41,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:41,473 INFO L82 PathProgramCache]: Analyzing trace with hash -966536096, now seen corresponding path program 106 times [2020-09-11 16:17:41,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:41,474 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192171309] [2020-09-11 16:17:41,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:41,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:41,640 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:41,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192171309] [2020-09-11 16:17:41,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294335936] [2020-09-11 16:17:41,641 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:41,700 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:17:41,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:41,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 16:17:41,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:41,733 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:41,746 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:41,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:41,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-11 16:17:41,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627329246] [2020-09-11 16:17:41,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 16:17:41,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:41,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 16:17:41,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:17:41,748 INFO L87 Difference]: Start difference. First operand 71 states and 179 transitions. Second operand 18 states. [2020-09-11 16:17:42,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:42,637 INFO L93 Difference]: Finished difference Result 100 states and 237 transitions. [2020-09-11 16:17:42,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-11 16:17:42,638 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-11 16:17:42,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:42,639 INFO L225 Difference]: With dead ends: 100 [2020-09-11 16:17:42,639 INFO L226 Difference]: Without dead ends: 94 [2020-09-11 16:17:42,639 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=532, Invalid=1274, Unknown=0, NotChecked=0, Total=1806 [2020-09-11 16:17:42,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-09-11 16:17:42,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 70. [2020-09-11 16:17:42,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-11 16:17:42,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-09-11 16:17:42,642 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 21 [2020-09-11 16:17:42,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:42,643 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-09-11 16:17:42,643 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 16:17:42,643 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-09-11 16:17:42,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 16:17:42,643 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:42,644 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:42,853 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-09-11 16:17:42,853 INFO L427 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:42,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:42,854 INFO L82 PathProgramCache]: Analyzing trace with hash -966045986, now seen corresponding path program 107 times [2020-09-11 16:17:42,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:42,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157233374] [2020-09-11 16:17:42,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:42,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:43,039 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:43,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157233374] [2020-09-11 16:17:43,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905033112] [2020-09-11 16:17:43,040 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:43,122 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-11 16:17:43,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:43,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 16:17:43,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:43,158 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:43,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:43,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-11 16:17:43,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067963342] [2020-09-11 16:17:43,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:17:43,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:43,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:17:43,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:17:43,160 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 17 states. [2020-09-11 16:17:43,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:43,911 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-09-11 16:17:43,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-11 16:17:43,912 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-11 16:17:43,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:43,912 INFO L225 Difference]: With dead ends: 120 [2020-09-11 16:17:43,912 INFO L226 Difference]: Without dead ends: 114 [2020-09-11 16:17:43,913 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=612, Invalid=1280, Unknown=0, NotChecked=0, Total=1892 [2020-09-11 16:17:43,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-09-11 16:17:43,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 76. [2020-09-11 16:17:43,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-11 16:17:43,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 197 transitions. [2020-09-11 16:17:43,921 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 197 transitions. Word has length 21 [2020-09-11 16:17:43,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:43,921 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 197 transitions. [2020-09-11 16:17:43,921 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:17:43,921 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 197 transitions. [2020-09-11 16:17:43,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 16:17:43,922 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:43,922 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:44,130 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2020-09-11 16:17:44,130 INFO L427 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:44,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:44,131 INFO L82 PathProgramCache]: Analyzing trace with hash -966029246, now seen corresponding path program 108 times [2020-09-11 16:17:44,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:44,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828722918] [2020-09-11 16:17:44,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:44,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:44,340 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:44,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828722918] [2020-09-11 16:17:44,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068795944] [2020-09-11 16:17:44,341 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:44,401 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-11 16:17:44,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:44,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 16:17:44,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:44,428 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:44,443 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:44,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:44,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-11 16:17:44,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879725395] [2020-09-11 16:17:44,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 16:17:44,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:44,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 16:17:44,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:17:44,445 INFO L87 Difference]: Start difference. First operand 76 states and 197 transitions. Second operand 18 states. [2020-09-11 16:17:45,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:45,399 INFO L93 Difference]: Finished difference Result 101 states and 243 transitions. [2020-09-11 16:17:45,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-11 16:17:45,399 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-11 16:17:45,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:45,400 INFO L225 Difference]: With dead ends: 101 [2020-09-11 16:17:45,400 INFO L226 Difference]: Without dead ends: 93 [2020-09-11 16:17:45,401 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=623, Invalid=1357, Unknown=0, NotChecked=0, Total=1980 [2020-09-11 16:17:45,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-11 16:17:45,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 73. [2020-09-11 16:17:45,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-11 16:17:45,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 185 transitions. [2020-09-11 16:17:45,403 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 185 transitions. Word has length 21 [2020-09-11 16:17:45,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:45,403 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 185 transitions. [2020-09-11 16:17:45,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 16:17:45,404 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 185 transitions. [2020-09-11 16:17:45,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 16:17:45,404 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:45,404 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:45,605 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:45,605 INFO L427 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:45,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:45,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1728807741, now seen corresponding path program 109 times [2020-09-11 16:17:45,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:45,606 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17175889] [2020-09-11 16:17:45,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:45,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:45,884 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:45,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17175889] [2020-09-11 16:17:45,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951481859] [2020-09-11 16:17:45,885 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:45,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:45,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 16:17:45,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:45,960 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:45,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:45,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-11 16:17:45,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777226439] [2020-09-11 16:17:45,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 16:17:45,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:45,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 16:17:45,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:17:45,961 INFO L87 Difference]: Start difference. First operand 73 states and 185 transitions. Second operand 18 states. [2020-09-11 16:17:46,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:46,429 INFO L93 Difference]: Finished difference Result 114 states and 267 transitions. [2020-09-11 16:17:46,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 16:17:46,430 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-11 16:17:46,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:46,431 INFO L225 Difference]: With dead ends: 114 [2020-09-11 16:17:46,431 INFO L226 Difference]: Without dead ends: 108 [2020-09-11 16:17:46,431 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=321, Invalid=735, Unknown=0, NotChecked=0, Total=1056 [2020-09-11 16:17:46,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-11 16:17:46,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 75. [2020-09-11 16:17:46,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-11 16:17:46,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-11 16:17:46,434 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-11 16:17:46,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:46,434 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-11 16:17:46,434 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 16:17:46,434 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-11 16:17:46,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 16:17:46,434 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:46,435 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:46,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:46,639 INFO L427 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:46,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:46,639 INFO L82 PathProgramCache]: Analyzing trace with hash -689910111, now seen corresponding path program 110 times [2020-09-11 16:17:46,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:46,640 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638262008] [2020-09-11 16:17:46,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:46,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:46,919 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:46,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638262008] [2020-09-11 16:17:46,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111535086] [2020-09-11 16:17:46,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:46,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:17:46,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:46,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 16:17:46,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:47,010 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:47,024 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:47,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:47,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-11 16:17:47,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513492133] [2020-09-11 16:17:47,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 16:17:47,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:47,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 16:17:47,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:17:47,026 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-11 16:17:47,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:47,593 INFO L93 Difference]: Finished difference Result 111 states and 261 transitions. [2020-09-11 16:17:47,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 16:17:47,594 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-11 16:17:47,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:47,595 INFO L225 Difference]: With dead ends: 111 [2020-09-11 16:17:47,595 INFO L226 Difference]: Without dead ends: 105 [2020-09-11 16:17:47,595 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=362, Invalid=898, Unknown=0, NotChecked=0, Total=1260 [2020-09-11 16:17:47,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-11 16:17:47,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 74. [2020-09-11 16:17:47,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-11 16:17:47,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-11 16:17:47,598 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-11 16:17:47,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:47,598 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-11 16:17:47,598 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 16:17:47,598 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-11 16:17:47,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 16:17:47,598 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:47,598 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:47,799 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-09-11 16:17:47,799 INFO L427 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:47,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:47,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1588321, now seen corresponding path program 111 times [2020-09-11 16:17:47,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:47,800 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649595273] [2020-09-11 16:17:47,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:47,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:48,064 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:48,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649595273] [2020-09-11 16:17:48,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125967853] [2020-09-11 16:17:48,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:48,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-11 16:17:48,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:48,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 16:17:48,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:48,146 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:48,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:48,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-11 16:17:48,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165751766] [2020-09-11 16:17:48,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 16:17:48,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:48,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 16:17:48,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:17:48,148 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-11 16:17:48,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:48,679 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-09-11 16:17:48,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-11 16:17:48,680 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-11 16:17:48,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:48,681 INFO L225 Difference]: With dead ends: 108 [2020-09-11 16:17:48,681 INFO L226 Difference]: Without dead ends: 102 [2020-09-11 16:17:48,681 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=332, Invalid=858, Unknown=0, NotChecked=0, Total=1190 [2020-09-11 16:17:48,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-11 16:17:48,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 75. [2020-09-11 16:17:48,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-11 16:17:48,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-11 16:17:48,683 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-11 16:17:48,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:48,683 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-11 16:17:48,683 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 16:17:48,683 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-11 16:17:48,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 16:17:48,683 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:48,683 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:48,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:48,889 INFO L427 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:48,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:48,890 INFO L82 PathProgramCache]: Analyzing trace with hash 983603203, now seen corresponding path program 112 times [2020-09-11 16:17:48,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:48,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403755717] [2020-09-11 16:17:48,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:48,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:49,134 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:49,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403755717] [2020-09-11 16:17:49,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897253733] [2020-09-11 16:17:49,134 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:49,192 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:17:49,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:49,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 16:17:49,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:49,218 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:49,232 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:49,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:49,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-11 16:17:49,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984408301] [2020-09-11 16:17:49,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 16:17:49,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:49,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 16:17:49,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:17:49,233 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-11 16:17:49,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:49,873 INFO L93 Difference]: Finished difference Result 107 states and 253 transitions. [2020-09-11 16:17:49,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 16:17:49,873 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-11 16:17:49,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:49,874 INFO L225 Difference]: With dead ends: 107 [2020-09-11 16:17:49,874 INFO L226 Difference]: Without dead ends: 101 [2020-09-11 16:17:49,875 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=380, Invalid=1026, Unknown=0, NotChecked=0, Total=1406 [2020-09-11 16:17:49,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-11 16:17:49,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 74. [2020-09-11 16:17:49,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-11 16:17:49,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-11 16:17:49,878 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-11 16:17:49,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:49,878 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-11 16:17:49,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 16:17:49,884 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-11 16:17:49,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 16:17:49,884 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:49,885 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:50,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2020-09-11 16:17:50,086 INFO L427 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:50,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:50,086 INFO L82 PathProgramCache]: Analyzing trace with hash -633555839, now seen corresponding path program 113 times [2020-09-11 16:17:50,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:50,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671572582] [2020-09-11 16:17:50,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:50,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:50,339 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:50,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671572582] [2020-09-11 16:17:50,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356194591] [2020-09-11 16:17:50,340 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:50,400 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-11 16:17:50,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:50,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 16:17:50,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:50,417 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:50,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:50,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-11 16:17:50,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262061843] [2020-09-11 16:17:50,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 16:17:50,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:50,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 16:17:50,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:17:50,419 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-11 16:17:51,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:51,021 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-09-11 16:17:51,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 16:17:51,022 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-11 16:17:51,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:51,022 INFO L225 Difference]: With dead ends: 104 [2020-09-11 16:17:51,023 INFO L226 Difference]: Without dead ends: 98 [2020-09-11 16:17:51,023 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=359, Invalid=973, Unknown=0, NotChecked=0, Total=1332 [2020-09-11 16:17:51,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-11 16:17:51,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 75. [2020-09-11 16:17:51,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-11 16:17:51,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-11 16:17:51,026 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-11 16:17:51,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:51,026 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-11 16:17:51,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 16:17:51,026 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-11 16:17:51,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 16:17:51,027 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:51,027 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:51,230 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-09-11 16:17:51,231 INFO L427 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:51,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:51,231 INFO L82 PathProgramCache]: Analyzing trace with hash 623333861, now seen corresponding path program 114 times [2020-09-11 16:17:51,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:51,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124361269] [2020-09-11 16:17:51,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:51,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:51,486 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:51,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124361269] [2020-09-11 16:17:51,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588687905] [2020-09-11 16:17:51,487 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:51,550 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-11 16:17:51,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:51,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 16:17:51,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:51,579 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:51,591 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:51,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:51,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-11 16:17:51,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413854087] [2020-09-11 16:17:51,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 16:17:51,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:51,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 16:17:51,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:17:51,593 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-11 16:17:52,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:52,368 INFO L93 Difference]: Finished difference Result 103 states and 245 transitions. [2020-09-11 16:17:52,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 16:17:52,368 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-11 16:17:52,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:52,369 INFO L225 Difference]: With dead ends: 103 [2020-09-11 16:17:52,369 INFO L226 Difference]: Without dead ends: 97 [2020-09-11 16:17:52,370 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=414, Invalid=1146, Unknown=0, NotChecked=0, Total=1560 [2020-09-11 16:17:52,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-11 16:17:52,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 74. [2020-09-11 16:17:52,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-11 16:17:52,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-11 16:17:52,373 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-11 16:17:52,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:52,373 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-11 16:17:52,373 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 16:17:52,373 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-11 16:17:52,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 16:17:52,374 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:52,374 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:52,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2020-09-11 16:17:52,580 INFO L427 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:52,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:52,580 INFO L82 PathProgramCache]: Analyzing trace with hash -2055440925, now seen corresponding path program 115 times [2020-09-11 16:17:52,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:52,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348647226] [2020-09-11 16:17:52,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:52,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:52,778 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:52,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348647226] [2020-09-11 16:17:52,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381687765] [2020-09-11 16:17:52,779 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:52,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:52,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 16:17:52,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:52,864 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:52,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:52,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-11 16:17:52,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744761405] [2020-09-11 16:17:52,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 16:17:52,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:52,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 16:17:52,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:17:52,865 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-11 16:17:53,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:53,543 INFO L93 Difference]: Finished difference Result 100 states and 239 transitions. [2020-09-11 16:17:53,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-11 16:17:53,544 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-11 16:17:53,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:53,544 INFO L225 Difference]: With dead ends: 100 [2020-09-11 16:17:53,545 INFO L226 Difference]: Without dead ends: 94 [2020-09-11 16:17:53,545 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2020-09-11 16:17:53,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-09-11 16:17:53,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 75. [2020-09-11 16:17:53,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-11 16:17:53,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-11 16:17:53,548 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-11 16:17:53,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:53,548 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-11 16:17:53,549 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 16:17:53,549 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-11 16:17:53,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 16:17:53,549 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:53,549 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:53,757 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:53,758 INFO L427 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:53,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:53,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1535697849, now seen corresponding path program 116 times [2020-09-11 16:17:53,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:53,759 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215361373] [2020-09-11 16:17:53,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:53,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:54,002 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:54,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215361373] [2020-09-11 16:17:54,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601409273] [2020-09-11 16:17:54,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:54,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:17:54,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:54,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 16:17:54,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:54,101 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:54,117 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:54,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:54,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-11 16:17:54,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480904299] [2020-09-11 16:17:54,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 16:17:54,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:54,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 16:17:54,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:17:54,119 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-11 16:17:54,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:54,994 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-09-11 16:17:54,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 16:17:54,995 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-11 16:17:54,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:54,996 INFO L225 Difference]: With dead ends: 99 [2020-09-11 16:17:54,996 INFO L226 Difference]: Without dead ends: 93 [2020-09-11 16:17:54,996 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=464, Invalid=1258, Unknown=0, NotChecked=0, Total=1722 [2020-09-11 16:17:54,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-11 16:17:54,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 74. [2020-09-11 16:17:54,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-11 16:17:54,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-11 16:17:54,999 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-11 16:17:54,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:54,999 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-11 16:17:54,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 16:17:54,999 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-11 16:17:54,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 16:17:54,999 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:54,999 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:55,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2020-09-11 16:17:55,200 INFO L427 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:55,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:55,201 INFO L82 PathProgramCache]: Analyzing trace with hash 119613381, now seen corresponding path program 117 times [2020-09-11 16:17:55,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:55,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716495190] [2020-09-11 16:17:55,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:55,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:55,402 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:55,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716495190] [2020-09-11 16:17:55,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190269063] [2020-09-11 16:17:55,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:55,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-11 16:17:55,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:55,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 16:17:55,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:55,496 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:55,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:55,497 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-11 16:17:55,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938837401] [2020-09-11 16:17:55,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 16:17:55,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:55,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 16:17:55,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:17:55,498 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-11 16:17:56,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:56,235 INFO L93 Difference]: Finished difference Result 96 states and 231 transitions. [2020-09-11 16:17:56,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-11 16:17:56,236 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-11 16:17:56,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:56,236 INFO L225 Difference]: With dead ends: 96 [2020-09-11 16:17:56,237 INFO L226 Difference]: Without dead ends: 90 [2020-09-11 16:17:56,237 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=461, Invalid=1179, Unknown=0, NotChecked=0, Total=1640 [2020-09-11 16:17:56,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-11 16:17:56,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 75. [2020-09-11 16:17:56,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-11 16:17:56,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-11 16:17:56,240 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-11 16:17:56,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:56,240 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-11 16:17:56,240 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 16:17:56,241 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-11 16:17:56,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 16:17:56,241 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:56,241 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:56,445 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:56,446 INFO L427 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:56,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:56,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1600514263, now seen corresponding path program 118 times [2020-09-11 16:17:56,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:56,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770322680] [2020-09-11 16:17:56,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:56,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:56,679 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:56,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770322680] [2020-09-11 16:17:56,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479873980] [2020-09-11 16:17:56,680 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:56,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:17:56,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:56,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 16:17:56,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:56,774 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:56,791 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:56,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:56,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-11 16:17:56,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368934654] [2020-09-11 16:17:56,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 16:17:56,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:56,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 16:17:56,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:17:56,793 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-11 16:17:57,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:57,767 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-09-11 16:17:57,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-11 16:17:57,768 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-11 16:17:57,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:57,769 INFO L225 Difference]: With dead ends: 95 [2020-09-11 16:17:57,769 INFO L226 Difference]: Without dead ends: 89 [2020-09-11 16:17:57,770 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=530, Invalid=1362, Unknown=0, NotChecked=0, Total=1892 [2020-09-11 16:17:57,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-11 16:17:57,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2020-09-11 16:17:57,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-11 16:17:57,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-11 16:17:57,772 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-11 16:17:57,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:57,772 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-11 16:17:57,772 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 16:17:57,772 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-11 16:17:57,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 16:17:57,772 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:57,773 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:57,973 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:57,974 INFO L427 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:57,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:57,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1129518553, now seen corresponding path program 119 times [2020-09-11 16:17:57,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:57,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878483243] [2020-09-11 16:17:57,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:57,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:58,198 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:58,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878483243] [2020-09-11 16:17:58,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968480816] [2020-09-11 16:17:58,199 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:58,285 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-11 16:17:58,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:58,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 16:17:58,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:58,314 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:58,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:58,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-11 16:17:58,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219873771] [2020-09-11 16:17:58,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 16:17:58,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:58,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 16:17:58,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:17:58,316 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-11 16:17:59,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:59,058 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-09-11 16:17:59,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-11 16:17:59,059 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-11 16:17:59,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:59,060 INFO L225 Difference]: With dead ends: 92 [2020-09-11 16:17:59,060 INFO L226 Difference]: Without dead ends: 86 [2020-09-11 16:17:59,061 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2020-09-11 16:17:59,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-11 16:17:59,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 75. [2020-09-11 16:17:59,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-11 16:17:59,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-11 16:17:59,064 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-11 16:17:59,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:59,065 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-11 16:17:59,065 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 16:17:59,065 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-11 16:17:59,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 16:17:59,065 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:59,066 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:59,275 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:59,275 INFO L427 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:59,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:59,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1113431413, now seen corresponding path program 120 times [2020-09-11 16:17:59,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:59,276 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159991313] [2020-09-11 16:17:59,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:59,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:59,505 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:59,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159991313] [2020-09-11 16:17:59,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44368525] [2020-09-11 16:17:59,506 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:59,567 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-11 16:17:59,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:59,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 16:17:59,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:59,605 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:59,629 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:59,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:59,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-11 16:17:59,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777941540] [2020-09-11 16:17:59,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 16:17:59,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:59,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 16:17:59,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:17:59,631 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-11 16:18:00,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:00,744 INFO L93 Difference]: Finished difference Result 91 states and 221 transitions. [2020-09-11 16:18:00,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-11 16:18:00,745 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-11 16:18:00,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:00,746 INFO L225 Difference]: With dead ends: 91 [2020-09-11 16:18:00,746 INFO L226 Difference]: Without dead ends: 85 [2020-09-11 16:18:00,747 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=612, Invalid=1458, Unknown=0, NotChecked=0, Total=2070 [2020-09-11 16:18:00,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-11 16:18:00,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 74. [2020-09-11 16:18:00,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-11 16:18:00,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-11 16:18:00,750 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-11 16:18:00,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:00,750 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-11 16:18:00,751 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 16:18:00,751 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-11 16:18:00,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 16:18:00,751 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:00,752 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:00,961 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:00,961 INFO L427 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:00,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:00,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1112941303, now seen corresponding path program 121 times [2020-09-11 16:18:00,962 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:00,963 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189733652] [2020-09-11 16:18:00,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:00,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:01,148 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:01,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189733652] [2020-09-11 16:18:01,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631756935] [2020-09-11 16:18:01,149 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:01,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:01,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 16:18:01,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:01,231 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:01,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:01,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-11 16:18:01,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525950637] [2020-09-11 16:18:01,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 16:18:01,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:01,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 16:18:01,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:18:01,232 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-11 16:18:02,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:02,096 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-09-11 16:18:02,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-11 16:18:02,097 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-11 16:18:02,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:02,098 INFO L225 Difference]: With dead ends: 107 [2020-09-11 16:18:02,098 INFO L226 Difference]: Without dead ends: 101 [2020-09-11 16:18:02,099 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=627, Invalid=1353, Unknown=0, NotChecked=0, Total=1980 [2020-09-11 16:18:02,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-11 16:18:02,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 78. [2020-09-11 16:18:02,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-11 16:18:02,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 201 transitions. [2020-09-11 16:18:02,102 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 201 transitions. Word has length 22 [2020-09-11 16:18:02,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:02,102 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 201 transitions. [2020-09-11 16:18:02,103 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 16:18:02,103 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 201 transitions. [2020-09-11 16:18:02,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 16:18:02,103 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:02,103 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:02,305 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2020-09-11 16:18:02,306 INFO L427 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:02,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:02,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1112924563, now seen corresponding path program 122 times [2020-09-11 16:18:02,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:02,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908162368] [2020-09-11 16:18:02,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:02,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:02,525 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:02,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908162368] [2020-09-11 16:18:02,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798030693] [2020-09-11 16:18:02,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:02,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:18:02,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:02,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 16:18:02,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:02,613 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:18:02,631 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:02,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:02,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-11 16:18:02,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576441631] [2020-09-11 16:18:02,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 16:18:02,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:02,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 16:18:02,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:18:02,633 INFO L87 Difference]: Start difference. First operand 78 states and 201 transitions. Second operand 19 states. [2020-09-11 16:18:03,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:03,755 INFO L93 Difference]: Finished difference Result 88 states and 217 transitions. [2020-09-11 16:18:03,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-11 16:18:03,756 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-11 16:18:03,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:03,756 INFO L225 Difference]: With dead ends: 88 [2020-09-11 16:18:03,756 INFO L226 Difference]: Without dead ends: 80 [2020-09-11 16:18:03,757 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=710, Invalid=1546, Unknown=0, NotChecked=0, Total=2256 [2020-09-11 16:18:03,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-11 16:18:03,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 57. [2020-09-11 16:18:03,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-11 16:18:03,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 138 transitions. [2020-09-11 16:18:03,759 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 138 transitions. Word has length 22 [2020-09-11 16:18:03,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:03,759 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 138 transitions. [2020-09-11 16:18:03,759 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 16:18:03,759 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 138 transitions. [2020-09-11 16:18:03,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 16:18:03,760 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:03,760 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:03,961 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2020-09-11 16:18:03,961 INFO L427 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:03,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:03,962 INFO L82 PathProgramCache]: Analyzing trace with hash 117880753, now seen corresponding path program 123 times [2020-09-11 16:18:03,962 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:03,962 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608101323] [2020-09-11 16:18:03,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:03,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:04,187 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:04,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608101323] [2020-09-11 16:18:04,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099821383] [2020-09-11 16:18:04,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:04,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-11 16:18:04,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:04,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 16:18:04,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:04,279 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:18:04,299 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:04,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:04,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-11 16:18:04,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88116846] [2020-09-11 16:18:04,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 16:18:04,300 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:04,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 16:18:04,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:18:04,301 INFO L87 Difference]: Start difference. First operand 57 states and 138 transitions. Second operand 19 states. [2020-09-11 16:18:05,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:05,326 INFO L93 Difference]: Finished difference Result 100 states and 243 transitions. [2020-09-11 16:18:05,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-11 16:18:05,327 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-11 16:18:05,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:05,327 INFO L225 Difference]: With dead ends: 100 [2020-09-11 16:18:05,328 INFO L226 Difference]: Without dead ends: 95 [2020-09-11 16:18:05,328 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=745, Invalid=1511, Unknown=0, NotChecked=0, Total=2256 [2020-09-11 16:18:05,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-11 16:18:05,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 76. [2020-09-11 16:18:05,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-11 16:18:05,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-09-11 16:18:05,330 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 22 [2020-09-11 16:18:05,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:05,330 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-09-11 16:18:05,331 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 16:18:05,331 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-09-11 16:18:05,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 16:18:05,331 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:05,331 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:05,532 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-09-11 16:18:05,533 INFO L427 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:05,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:05,533 INFO L82 PathProgramCache]: Analyzing trace with hash -140906778, now seen corresponding path program 124 times [2020-09-11 16:18:05,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:05,534 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380549029] [2020-09-11 16:18:05,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:05,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:05,792 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:05,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380549029] [2020-09-11 16:18:05,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249451685] [2020-09-11 16:18:05,793 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:05,853 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:18:05,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:05,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 16:18:05,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:05,881 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:18:05,903 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:05,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:05,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-11 16:18:05,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884501638] [2020-09-11 16:18:05,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 16:18:05,905 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:05,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 16:18:05,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:18:05,905 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 20 states. [2020-09-11 16:18:07,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:07,024 INFO L93 Difference]: Finished difference Result 84 states and 213 transitions. [2020-09-11 16:18:07,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-11 16:18:07,025 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-11 16:18:07,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:07,025 INFO L225 Difference]: With dead ends: 84 [2020-09-11 16:18:07,025 INFO L226 Difference]: Without dead ends: 79 [2020-09-11 16:18:07,026 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=761, Invalid=1591, Unknown=0, NotChecked=0, Total=2352 [2020-09-11 16:18:07,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-11 16:18:07,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 58. [2020-09-11 16:18:07,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-11 16:18:07,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 142 transitions. [2020-09-11 16:18:07,028 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 142 transitions. Word has length 23 [2020-09-11 16:18:07,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:07,028 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 142 transitions. [2020-09-11 16:18:07,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 16:18:07,028 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 142 transitions. [2020-09-11 16:18:07,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 16:18:07,029 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:07,029 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:07,229 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-09-11 16:18:07,230 INFO L427 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:07,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:07,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1335609647, now seen corresponding path program 125 times [2020-09-11 16:18:07,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:07,231 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359918485] [2020-09-11 16:18:07,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:07,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:07,549 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:07,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359918485] [2020-09-11 16:18:07,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197142933] [2020-09-11 16:18:07,550 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:07,609 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-11 16:18:07,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:07,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 16:18:07,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:07,632 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:07,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:07,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-11 16:18:07,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950379547] [2020-09-11 16:18:07,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 16:18:07,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:07,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 16:18:07,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:18:07,634 INFO L87 Difference]: Start difference. First operand 58 states and 142 transitions. Second operand 19 states. [2020-09-11 16:18:08,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:08,126 INFO L93 Difference]: Finished difference Result 90 states and 209 transitions. [2020-09-11 16:18:08,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 16:18:08,126 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-11 16:18:08,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:08,127 INFO L225 Difference]: With dead ends: 90 [2020-09-11 16:18:08,127 INFO L226 Difference]: Without dead ends: 84 [2020-09-11 16:18:08,128 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=363, Invalid=759, Unknown=0, NotChecked=0, Total=1122 [2020-09-11 16:18:08,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-11 16:18:08,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2020-09-11 16:18:08,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-11 16:18:08,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 161 transitions. [2020-09-11 16:18:08,130 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 161 transitions. Word has length 23 [2020-09-11 16:18:08,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:08,130 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 161 transitions. [2020-09-11 16:18:08,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 16:18:08,131 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 161 transitions. [2020-09-11 16:18:08,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 16:18:08,131 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:08,131 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:08,333 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:08,333 INFO L427 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:08,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:08,334 INFO L82 PathProgramCache]: Analyzing trace with hash -2146158283, now seen corresponding path program 126 times [2020-09-11 16:18:08,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:08,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14457567] [2020-09-11 16:18:08,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:08,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:08,656 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:08,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14457567] [2020-09-11 16:18:08,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542827526] [2020-09-11 16:18:08,657 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:08,720 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-11 16:18:08,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:08,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 16:18:08,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:08,750 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:18:08,762 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:08,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:08,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-11 16:18:08,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22851826] [2020-09-11 16:18:08,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 16:18:08,763 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:08,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 16:18:08,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:18:08,764 INFO L87 Difference]: Start difference. First operand 66 states and 161 transitions. Second operand 20 states. [2020-09-11 16:18:09,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:09,297 INFO L93 Difference]: Finished difference Result 106 states and 241 transitions. [2020-09-11 16:18:09,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 16:18:09,298 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-11 16:18:09,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:09,299 INFO L225 Difference]: With dead ends: 106 [2020-09-11 16:18:09,299 INFO L226 Difference]: Without dead ends: 100 [2020-09-11 16:18:09,300 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=372, Invalid=888, Unknown=0, NotChecked=0, Total=1260 [2020-09-11 16:18:09,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-11 16:18:09,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-09-11 16:18:09,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-11 16:18:09,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 157 transitions. [2020-09-11 16:18:09,303 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 157 transitions. Word has length 23 [2020-09-11 16:18:09,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:09,303 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 157 transitions. [2020-09-11 16:18:09,303 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 16:18:09,303 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 157 transitions. [2020-09-11 16:18:09,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 16:18:09,304 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:09,304 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:09,510 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2020-09-11 16:18:09,510 INFO L427 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:09,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:09,511 INFO L82 PathProgramCache]: Analyzing trace with hash -2093881677, now seen corresponding path program 127 times [2020-09-11 16:18:09,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:09,512 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262639078] [2020-09-11 16:18:09,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:09,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:09,817 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:09,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262639078] [2020-09-11 16:18:09,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605283472] [2020-09-11 16:18:09,818 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:09,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:09,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 16:18:09,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:09,895 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:09,895 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:09,895 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-11 16:18:09,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491335391] [2020-09-11 16:18:09,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 16:18:09,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:09,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 16:18:09,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:18:09,897 INFO L87 Difference]: Start difference. First operand 64 states and 157 transitions. Second operand 19 states. [2020-09-11 16:18:10,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:10,503 INFO L93 Difference]: Finished difference Result 107 states and 245 transitions. [2020-09-11 16:18:10,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 16:18:10,503 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-11 16:18:10,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:10,504 INFO L225 Difference]: With dead ends: 107 [2020-09-11 16:18:10,504 INFO L226 Difference]: Without dead ends: 101 [2020-09-11 16:18:10,505 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=377, Invalid=955, Unknown=0, NotChecked=0, Total=1332 [2020-09-11 16:18:10,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-11 16:18:10,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-09-11 16:18:10,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-11 16:18:10,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 165 transitions. [2020-09-11 16:18:10,508 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 165 transitions. Word has length 23 [2020-09-11 16:18:10,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:10,508 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 165 transitions. [2020-09-11 16:18:10,508 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 16:18:10,508 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 165 transitions. [2020-09-11 16:18:10,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 16:18:10,509 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:10,509 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:10,718 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2020-09-11 16:18:10,718 INFO L427 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:10,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:10,719 INFO L82 PathProgramCache]: Analyzing trace with hash -217632233, now seen corresponding path program 128 times [2020-09-11 16:18:10,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:10,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801482967] [2020-09-11 16:18:10,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:10,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:11,034 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:11,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801482967] [2020-09-11 16:18:11,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805073658] [2020-09-11 16:18:11,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:11,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:18:11,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:11,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 16:18:11,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:11,123 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:18:11,136 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:11,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:11,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-11 16:18:11,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769273648] [2020-09-11 16:18:11,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 16:18:11,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:11,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 16:18:11,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:18:11,137 INFO L87 Difference]: Start difference. First operand 67 states and 165 transitions. Second operand 20 states. [2020-09-11 16:18:11,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:11,785 INFO L93 Difference]: Finished difference Result 119 states and 269 transitions. [2020-09-11 16:18:11,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 16:18:11,786 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-11 16:18:11,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:11,787 INFO L225 Difference]: With dead ends: 119 [2020-09-11 16:18:11,787 INFO L226 Difference]: Without dead ends: 113 [2020-09-11 16:18:11,787 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=409, Invalid=1073, Unknown=0, NotChecked=0, Total=1482 [2020-09-11 16:18:11,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-11 16:18:11,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 66. [2020-09-11 16:18:11,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-11 16:18:11,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 163 transitions. [2020-09-11 16:18:11,789 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 163 transitions. Word has length 23 [2020-09-11 16:18:11,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:11,790 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 163 transitions. [2020-09-11 16:18:11,790 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 16:18:11,790 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 163 transitions. [2020-09-11 16:18:11,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 16:18:11,790 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:11,790 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:11,990 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2020-09-11 16:18:11,991 INFO L427 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:11,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:11,991 INFO L82 PathProgramCache]: Analyzing trace with hash 470689557, now seen corresponding path program 129 times [2020-09-11 16:18:11,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:11,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018906707] [2020-09-11 16:18:11,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:12,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:12,288 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:12,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018906707] [2020-09-11 16:18:12,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095144070] [2020-09-11 16:18:12,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:12,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-11 16:18:12,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:12,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 16:18:12,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:12,376 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:12,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:12,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-11 16:18:12,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68102285] [2020-09-11 16:18:12,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 16:18:12,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:12,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 16:18:12,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:18:12,378 INFO L87 Difference]: Start difference. First operand 66 states and 163 transitions. Second operand 19 states. [2020-09-11 16:18:13,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:13,043 INFO L93 Difference]: Finished difference Result 119 states and 271 transitions. [2020-09-11 16:18:13,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-11 16:18:13,044 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-11 16:18:13,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:13,045 INFO L225 Difference]: With dead ends: 119 [2020-09-11 16:18:13,045 INFO L226 Difference]: Without dead ends: 113 [2020-09-11 16:18:13,046 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=428, Invalid=1132, Unknown=0, NotChecked=0, Total=1560 [2020-09-11 16:18:13,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-11 16:18:13,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 69. [2020-09-11 16:18:13,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-11 16:18:13,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 171 transitions. [2020-09-11 16:18:13,048 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 171 transitions. Word has length 23 [2020-09-11 16:18:13,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:13,048 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 171 transitions. [2020-09-11 16:18:13,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 16:18:13,049 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 171 transitions. [2020-09-11 16:18:13,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 16:18:13,049 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:13,049 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:13,257 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:13,258 INFO L427 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:13,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:13,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1455881081, now seen corresponding path program 130 times [2020-09-11 16:18:13,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:13,259 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607809641] [2020-09-11 16:18:13,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:13,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:13,541 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:13,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607809641] [2020-09-11 16:18:13,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441734415] [2020-09-11 16:18:13,542 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:13,605 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:18:13,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:13,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 16:18:13,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:13,634 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:18:13,649 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:13,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:13,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-11 16:18:13,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001360833] [2020-09-11 16:18:13,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 16:18:13,650 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:13,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 16:18:13,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:18:13,651 INFO L87 Difference]: Start difference. First operand 69 states and 171 transitions. Second operand 20 states. [2020-09-11 16:18:14,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:14,422 INFO L93 Difference]: Finished difference Result 116 states and 265 transitions. [2020-09-11 16:18:14,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 16:18:14,423 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-11 16:18:14,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:14,424 INFO L225 Difference]: With dead ends: 116 [2020-09-11 16:18:14,424 INFO L226 Difference]: Without dead ends: 110 [2020-09-11 16:18:14,424 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=434, Invalid=1206, Unknown=0, NotChecked=0, Total=1640 [2020-09-11 16:18:14,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-09-11 16:18:14,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 68. [2020-09-11 16:18:14,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-11 16:18:14,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 169 transitions. [2020-09-11 16:18:14,426 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 169 transitions. Word has length 23 [2020-09-11 16:18:14,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:14,426 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 169 transitions. [2020-09-11 16:18:14,426 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 16:18:14,426 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 169 transitions. [2020-09-11 16:18:14,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 16:18:14,427 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:14,427 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:14,627 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:14,628 INFO L427 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:14,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:14,628 INFO L82 PathProgramCache]: Analyzing trace with hash -161277961, now seen corresponding path program 131 times [2020-09-11 16:18:14,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:14,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221457171] [2020-09-11 16:18:14,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:14,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:14,899 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:14,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221457171] [2020-09-11 16:18:14,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173029388] [2020-09-11 16:18:14,900 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:14,968 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-11 16:18:14,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:14,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 16:18:14,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:15,009 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:15,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:15,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-11 16:18:15,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448542144] [2020-09-11 16:18:15,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 16:18:15,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:15,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 16:18:15,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:18:15,012 INFO L87 Difference]: Start difference. First operand 68 states and 169 transitions. Second operand 19 states. [2020-09-11 16:18:15,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:15,715 INFO L93 Difference]: Finished difference Result 117 states and 269 transitions. [2020-09-11 16:18:15,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-11 16:18:15,716 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-11 16:18:15,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:15,717 INFO L225 Difference]: With dead ends: 117 [2020-09-11 16:18:15,717 INFO L226 Difference]: Without dead ends: 111 [2020-09-11 16:18:15,717 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=468, Invalid=1254, Unknown=0, NotChecked=0, Total=1722 [2020-09-11 16:18:15,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-11 16:18:15,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 71. [2020-09-11 16:18:15,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-11 16:18:15,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 177 transitions. [2020-09-11 16:18:15,719 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 177 transitions. Word has length 23 [2020-09-11 16:18:15,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:15,719 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 177 transitions. [2020-09-11 16:18:15,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 16:18:15,720 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 177 transitions. [2020-09-11 16:18:15,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 16:18:15,720 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:15,720 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:15,926 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:15,926 INFO L427 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:15,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:15,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1095611739, now seen corresponding path program 132 times [2020-09-11 16:18:15,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:15,927 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631949781] [2020-09-11 16:18:15,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:15,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:16,199 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:16,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631949781] [2020-09-11 16:18:16,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182895270] [2020-09-11 16:18:16,199 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:16,271 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-11 16:18:16,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:16,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 16:18:16,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:16,314 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:18:16,327 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:16,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:16,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-11 16:18:16,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622510437] [2020-09-11 16:18:16,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 16:18:16,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:16,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 16:18:16,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:18:16,329 INFO L87 Difference]: Start difference. First operand 71 states and 177 transitions. Second operand 20 states. [2020-09-11 16:18:17,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:17,155 INFO L93 Difference]: Finished difference Result 114 states and 263 transitions. [2020-09-11 16:18:17,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 16:18:17,156 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-11 16:18:17,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:17,157 INFO L225 Difference]: With dead ends: 114 [2020-09-11 16:18:17,157 INFO L226 Difference]: Without dead ends: 108 [2020-09-11 16:18:17,157 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=475, Invalid=1331, Unknown=0, NotChecked=0, Total=1806 [2020-09-11 16:18:17,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-11 16:18:17,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 70. [2020-09-11 16:18:17,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-11 16:18:17,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 175 transitions. [2020-09-11 16:18:17,159 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 175 transitions. Word has length 23 [2020-09-11 16:18:17,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:17,160 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 175 transitions. [2020-09-11 16:18:17,160 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 16:18:17,160 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 175 transitions. [2020-09-11 16:18:17,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 16:18:17,160 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:17,160 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:17,369 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-09-11 16:18:17,369 INFO L427 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:17,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:17,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1583163047, now seen corresponding path program 133 times [2020-09-11 16:18:17,370 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:17,370 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220897081] [2020-09-11 16:18:17,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:17,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:17,636 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:17,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220897081] [2020-09-11 16:18:17,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780681302] [2020-09-11 16:18:17,637 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:17,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:17,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 16:18:17,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:17,716 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:17,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:17,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-11 16:18:17,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217501456] [2020-09-11 16:18:17,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 16:18:17,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:17,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 16:18:17,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:18:17,718 INFO L87 Difference]: Start difference. First operand 70 states and 175 transitions. Second operand 19 states. [2020-09-11 16:18:18,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:18,508 INFO L93 Difference]: Finished difference Result 115 states and 267 transitions. [2020-09-11 16:18:18,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-11 16:18:18,509 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-11 16:18:18,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:18,509 INFO L225 Difference]: With dead ends: 115 [2020-09-11 16:18:18,509 INFO L226 Difference]: Without dead ends: 109 [2020-09-11 16:18:18,510 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=524, Invalid=1368, Unknown=0, NotChecked=0, Total=1892 [2020-09-11 16:18:18,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-11 16:18:18,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 73. [2020-09-11 16:18:18,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-11 16:18:18,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2020-09-11 16:18:18,511 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 23 [2020-09-11 16:18:18,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:18,511 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2020-09-11 16:18:18,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 16:18:18,512 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2020-09-11 16:18:18,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 16:18:18,512 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:18,512 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:18,713 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:18,713 INFO L427 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:18,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:18,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1063419971, now seen corresponding path program 134 times [2020-09-11 16:18:18,714 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:18,714 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117148008] [2020-09-11 16:18:18,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:18,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:18,981 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:18,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117148008] [2020-09-11 16:18:18,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957027709] [2020-09-11 16:18:18,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:19,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:18:19,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:19,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 16:18:19,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:19,074 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:18:19,091 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:19,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:19,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-11 16:18:19,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678798897] [2020-09-11 16:18:19,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 16:18:19,092 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:19,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 16:18:19,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:18:19,092 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand 20 states. [2020-09-11 16:18:20,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:20,051 INFO L93 Difference]: Finished difference Result 112 states and 261 transitions. [2020-09-11 16:18:20,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-11 16:18:20,052 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-11 16:18:20,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:20,053 INFO L225 Difference]: With dead ends: 112 [2020-09-11 16:18:20,053 INFO L226 Difference]: Without dead ends: 106 [2020-09-11 16:18:20,053 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=532, Invalid=1448, Unknown=0, NotChecked=0, Total=1980 [2020-09-11 16:18:20,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-09-11 16:18:20,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 72. [2020-09-11 16:18:20,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-11 16:18:20,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 181 transitions. [2020-09-11 16:18:20,055 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 181 transitions. Word has length 23 [2020-09-11 16:18:20,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:20,055 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 181 transitions. [2020-09-11 16:18:20,055 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 16:18:20,055 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 181 transitions. [2020-09-11 16:18:20,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 16:18:20,055 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:20,056 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:20,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-09-11 16:18:20,257 INFO L427 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:20,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:20,257 INFO L82 PathProgramCache]: Analyzing trace with hash 591891259, now seen corresponding path program 135 times [2020-09-11 16:18:20,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:20,258 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184191726] [2020-09-11 16:18:20,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:20,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:20,520 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:20,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184191726] [2020-09-11 16:18:20,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300772069] [2020-09-11 16:18:20,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:20,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-11 16:18:20,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:20,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 16:18:20,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:20,617 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:20,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:20,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-11 16:18:20,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432334242] [2020-09-11 16:18:20,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 16:18:20,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:20,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 16:18:20,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:18:20,619 INFO L87 Difference]: Start difference. First operand 72 states and 181 transitions. Second operand 19 states. [2020-09-11 16:18:21,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:21,484 INFO L93 Difference]: Finished difference Result 113 states and 265 transitions. [2020-09-11 16:18:21,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-11 16:18:21,485 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-11 16:18:21,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:21,486 INFO L225 Difference]: With dead ends: 113 [2020-09-11 16:18:21,486 INFO L226 Difference]: Without dead ends: 107 [2020-09-11 16:18:21,486 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=596, Invalid=1474, Unknown=0, NotChecked=0, Total=2070 [2020-09-11 16:18:21,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-09-11 16:18:21,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 75. [2020-09-11 16:18:21,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-11 16:18:21,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-11 16:18:21,489 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 23 [2020-09-11 16:18:21,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:21,489 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-11 16:18:21,489 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 16:18:21,489 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-11 16:18:21,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 16:18:21,490 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:21,490 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:21,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2020-09-11 16:18:21,691 INFO L427 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:21,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:21,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1128236385, now seen corresponding path program 136 times [2020-09-11 16:18:21,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:21,692 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618931307] [2020-09-11 16:18:21,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:21,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:21,957 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:21,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618931307] [2020-09-11 16:18:21,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226646527] [2020-09-11 16:18:21,958 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:22,019 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:18:22,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:22,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 16:18:22,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:22,048 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:18:22,065 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:22,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:22,066 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-11 16:18:22,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903140931] [2020-09-11 16:18:22,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 16:18:22,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:22,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 16:18:22,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:18:22,067 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 20 states. [2020-09-11 16:18:23,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:23,126 INFO L93 Difference]: Finished difference Result 110 states and 259 transitions. [2020-09-11 16:18:23,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-11 16:18:23,127 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-11 16:18:23,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:23,128 INFO L225 Difference]: With dead ends: 110 [2020-09-11 16:18:23,128 INFO L226 Difference]: Without dead ends: 104 [2020-09-11 16:18:23,128 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=605, Invalid=1557, Unknown=0, NotChecked=0, Total=2162 [2020-09-11 16:18:23,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-09-11 16:18:23,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 74. [2020-09-11 16:18:23,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-11 16:18:23,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-11 16:18:23,131 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 23 [2020-09-11 16:18:23,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:23,131 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-11 16:18:23,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 16:18:23,131 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-11 16:18:23,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 16:18:23,132 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:23,132 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:23,333 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2020-09-11 16:18:23,333 INFO L427 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:23,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:23,334 INFO L82 PathProgramCache]: Analyzing trace with hash -657240675, now seen corresponding path program 137 times [2020-09-11 16:18:23,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:23,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986988022] [2020-09-11 16:18:23,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:23,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:23,582 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:23,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986988022] [2020-09-11 16:18:23,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309815552] [2020-09-11 16:18:23,583 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:23,650 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-11 16:18:23,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:23,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 16:18:23,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:23,676 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:23,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:23,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-11 16:18:23,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264731924] [2020-09-11 16:18:23,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 16:18:23,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:23,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 16:18:23,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:18:23,678 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 19 states. [2020-09-11 16:18:24,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:24,625 INFO L93 Difference]: Finished difference Result 111 states and 263 transitions. [2020-09-11 16:18:24,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-11 16:18:24,627 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-11 16:18:24,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:24,627 INFO L225 Difference]: With dead ends: 111 [2020-09-11 16:18:24,627 INFO L226 Difference]: Without dead ends: 105 [2020-09-11 16:18:24,628 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=684, Invalid=1572, Unknown=0, NotChecked=0, Total=2256 [2020-09-11 16:18:24,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-11 16:18:24,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 77. [2020-09-11 16:18:24,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-11 16:18:24,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 195 transitions. [2020-09-11 16:18:24,630 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 195 transitions. Word has length 23 [2020-09-11 16:18:24,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:24,630 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 195 transitions. [2020-09-11 16:18:24,631 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 16:18:24,631 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 195 transitions. [2020-09-11 16:18:24,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 16:18:24,631 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:24,631 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:24,832 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:24,832 INFO L427 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:24,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:24,833 INFO L82 PathProgramCache]: Analyzing trace with hash -641153535, now seen corresponding path program 138 times [2020-09-11 16:18:24,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:24,833 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677267839] [2020-09-11 16:18:24,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:24,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:25,082 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:25,082 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677267839] [2020-09-11 16:18:25,082 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4484549] [2020-09-11 16:18:25,082 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:25,141 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-11 16:18:25,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:25,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 16:18:25,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:25,170 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:18:25,188 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:25,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:25,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-11 16:18:25,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397008974] [2020-09-11 16:18:25,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 16:18:25,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:25,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 16:18:25,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:18:25,190 INFO L87 Difference]: Start difference. First operand 77 states and 195 transitions. Second operand 20 states. [2020-09-11 16:18:26,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:26,352 INFO L93 Difference]: Finished difference Result 108 states and 257 transitions. [2020-09-11 16:18:26,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-11 16:18:26,353 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-11 16:18:26,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:26,354 INFO L225 Difference]: With dead ends: 108 [2020-09-11 16:18:26,354 INFO L226 Difference]: Without dead ends: 102 [2020-09-11 16:18:26,354 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=694, Invalid=1658, Unknown=0, NotChecked=0, Total=2352 [2020-09-11 16:18:26,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-11 16:18:26,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 76. [2020-09-11 16:18:26,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-11 16:18:26,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-09-11 16:18:26,356 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 23 [2020-09-11 16:18:26,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:26,356 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-09-11 16:18:26,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 16:18:26,356 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-09-11 16:18:26,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 16:18:26,356 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:26,357 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:26,557 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-09-11 16:18:26,558 INFO L427 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:26,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:26,558 INFO L82 PathProgramCache]: Analyzing trace with hash -640663425, now seen corresponding path program 139 times [2020-09-11 16:18:26,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:26,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241178441] [2020-09-11 16:18:26,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:26,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:26,808 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:26,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241178441] [2020-09-11 16:18:26,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178327647] [2020-09-11 16:18:26,809 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:26,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:26,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 16:18:26,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:26,900 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:26,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:26,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-11 16:18:26,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975625036] [2020-09-11 16:18:26,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 16:18:26,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:26,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 16:18:26,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:18:26,901 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 19 states. [2020-09-11 16:18:27,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:27,907 INFO L93 Difference]: Finished difference Result 128 states and 307 transitions. [2020-09-11 16:18:27,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-11 16:18:27,908 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-11 16:18:27,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:27,909 INFO L225 Difference]: With dead ends: 128 [2020-09-11 16:18:27,909 INFO L226 Difference]: Without dead ends: 122 [2020-09-11 16:18:27,910 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=788, Invalid=1662, Unknown=0, NotChecked=0, Total=2450 [2020-09-11 16:18:27,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-09-11 16:18:27,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 82. [2020-09-11 16:18:27,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-11 16:18:27,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 213 transitions. [2020-09-11 16:18:27,911 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 213 transitions. Word has length 23 [2020-09-11 16:18:27,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:27,912 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 213 transitions. [2020-09-11 16:18:27,912 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 16:18:27,912 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 213 transitions. [2020-09-11 16:18:27,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 16:18:27,912 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:27,912 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:28,113 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:28,113 INFO L427 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:28,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:28,114 INFO L82 PathProgramCache]: Analyzing trace with hash -640646685, now seen corresponding path program 140 times [2020-09-11 16:18:28,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:28,114 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307149749] [2020-09-11 16:18:28,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:28,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:28,362 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:28,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307149749] [2020-09-11 16:18:28,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397494362] [2020-09-11 16:18:28,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:28,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:18:28,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:28,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 16:18:28,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:28,459 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:18:28,477 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:28,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:28,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-11 16:18:28,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445778657] [2020-09-11 16:18:28,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 16:18:28,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:28,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 16:18:28,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:18:28,478 INFO L87 Difference]: Start difference. First operand 82 states and 213 transitions. Second operand 20 states. [2020-09-11 16:18:29,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:29,681 INFO L93 Difference]: Finished difference Result 109 states and 263 transitions. [2020-09-11 16:18:29,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-11 16:18:29,682 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-11 16:18:29,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:29,682 INFO L225 Difference]: With dead ends: 109 [2020-09-11 16:18:29,683 INFO L226 Difference]: Without dead ends: 101 [2020-09-11 16:18:29,683 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=799, Invalid=1751, Unknown=0, NotChecked=0, Total=2550 [2020-09-11 16:18:29,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-11 16:18:29,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 79. [2020-09-11 16:18:29,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-11 16:18:29,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 201 transitions. [2020-09-11 16:18:29,685 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 201 transitions. Word has length 23 [2020-09-11 16:18:29,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:29,686 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 201 transitions. [2020-09-11 16:18:29,686 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 16:18:29,686 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 201 transitions. [2020-09-11 16:18:29,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 16:18:29,686 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:29,686 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:29,887 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:29,887 INFO L427 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:29,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:29,888 INFO L82 PathProgramCache]: Analyzing trace with hash -768088516, now seen corresponding path program 141 times [2020-09-11 16:18:29,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:29,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170096645] [2020-09-11 16:18:29,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:29,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:30,217 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:30,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170096645] [2020-09-11 16:18:30,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087183018] [2020-09-11 16:18:30,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:30,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-11 16:18:30,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:30,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 16:18:30,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:30,298 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:30,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:30,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-11 16:18:30,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525358862] [2020-09-11 16:18:30,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 16:18:30,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:30,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 16:18:30,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:18:30,300 INFO L87 Difference]: Start difference. First operand 79 states and 201 transitions. Second operand 20 states. [2020-09-11 16:18:30,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:30,875 INFO L93 Difference]: Finished difference Result 124 states and 291 transitions. [2020-09-11 16:18:30,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-11 16:18:30,876 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-11 16:18:30,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:30,877 INFO L225 Difference]: With dead ends: 124 [2020-09-11 16:18:30,877 INFO L226 Difference]: Without dead ends: 118 [2020-09-11 16:18:30,877 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=405, Invalid=927, Unknown=0, NotChecked=0, Total=1332 [2020-09-11 16:18:30,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-11 16:18:30,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 81. [2020-09-11 16:18:30,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-11 16:18:30,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-11 16:18:30,880 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-11 16:18:30,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:30,881 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-11 16:18:30,881 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 16:18:30,881 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-11 16:18:30,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 16:18:30,882 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:30,882 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:31,090 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:31,091 INFO L427 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:31,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:31,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1578637152, now seen corresponding path program 142 times [2020-09-11 16:18:31,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:31,092 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426618169] [2020-09-11 16:18:31,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:31,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:31,445 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:31,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426618169] [2020-09-11 16:18:31,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691679215] [2020-09-11 16:18:31,446 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:31,511 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:18:31,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:31,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 16:18:31,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:31,539 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:18:31,552 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:31,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:31,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-11 16:18:31,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375073107] [2020-09-11 16:18:31,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 16:18:31,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:31,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 16:18:31,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:18:31,554 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-11 16:18:32,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:32,241 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-09-11 16:18:32,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 16:18:32,242 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-11 16:18:32,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:32,242 INFO L225 Difference]: With dead ends: 121 [2020-09-11 16:18:32,243 INFO L226 Difference]: Without dead ends: 115 [2020-09-11 16:18:32,243 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=449, Invalid=1111, Unknown=0, NotChecked=0, Total=1560 [2020-09-11 16:18:32,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-11 16:18:32,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 80. [2020-09-11 16:18:32,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-11 16:18:32,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-11 16:18:32,246 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-11 16:18:32,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:32,246 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-11 16:18:32,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 16:18:32,246 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-11 16:18:32,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 16:18:32,246 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:32,246 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:32,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:32,447 INFO L427 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:32,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:32,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1526360546, now seen corresponding path program 143 times [2020-09-11 16:18:32,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:32,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688793325] [2020-09-11 16:18:32,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:32,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:32,779 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:32,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688793325] [2020-09-11 16:18:32,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404358277] [2020-09-11 16:18:32,779 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:32,844 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-11 16:18:32,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:32,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 16:18:32,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:32,864 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:32,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:32,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-11 16:18:32,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955841727] [2020-09-11 16:18:32,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 16:18:32,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:32,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 16:18:32,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:18:32,865 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-11 16:18:33,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:33,504 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-09-11 16:18:33,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 16:18:33,505 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-11 16:18:33,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:33,506 INFO L225 Difference]: With dead ends: 118 [2020-09-11 16:18:33,506 INFO L226 Difference]: Without dead ends: 112 [2020-09-11 16:18:33,507 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=414, Invalid=1068, Unknown=0, NotChecked=0, Total=1482 [2020-09-11 16:18:33,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-11 16:18:33,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 81. [2020-09-11 16:18:33,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-11 16:18:33,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-11 16:18:33,509 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-11 16:18:33,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:33,509 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-11 16:18:33,509 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 16:18:33,509 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-11 16:18:33,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 16:18:33,509 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:33,509 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:33,710 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:33,710 INFO L427 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:33,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:33,711 INFO L82 PathProgramCache]: Analyzing trace with hash 349888898, now seen corresponding path program 144 times [2020-09-11 16:18:33,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:33,711 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221544402] [2020-09-11 16:18:33,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:33,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:34,056 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:34,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221544402] [2020-09-11 16:18:34,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815814161] [2020-09-11 16:18:34,057 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:34,124 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-11 16:18:34,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:34,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 16:18:34,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:34,153 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:18:34,168 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:34,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:34,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-11 16:18:34,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471621187] [2020-09-11 16:18:34,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 16:18:34,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:34,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 16:18:34,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:18:34,170 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-11 16:18:34,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:34,947 INFO L93 Difference]: Finished difference Result 117 states and 277 transitions. [2020-09-11 16:18:34,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 16:18:34,948 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-11 16:18:34,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:34,948 INFO L225 Difference]: With dead ends: 117 [2020-09-11 16:18:34,949 INFO L226 Difference]: Without dead ends: 111 [2020-09-11 16:18:34,949 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=465, Invalid=1257, Unknown=0, NotChecked=0, Total=1722 [2020-09-11 16:18:34,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-11 16:18:34,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 80. [2020-09-11 16:18:34,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-11 16:18:34,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-11 16:18:34,952 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-11 16:18:34,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:34,952 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-11 16:18:34,952 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 16:18:34,952 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-11 16:18:34,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 16:18:34,953 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:34,953 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:35,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-09-11 16:18:35,154 INFO L427 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:35,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:35,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1038210688, now seen corresponding path program 145 times [2020-09-11 16:18:35,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:35,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437043104] [2020-09-11 16:18:35,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:35,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:35,471 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:35,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437043104] [2020-09-11 16:18:35,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272725633] [2020-09-11 16:18:35,472 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:35,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:35,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 16:18:35,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:35,550 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:35,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:35,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-11 16:18:35,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010240220] [2020-09-11 16:18:35,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 16:18:35,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:35,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 16:18:35,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:18:35,551 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-11 16:18:36,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:36,279 INFO L93 Difference]: Finished difference Result 114 states and 271 transitions. [2020-09-11 16:18:36,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-11 16:18:36,280 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-11 16:18:36,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:36,280 INFO L225 Difference]: With dead ends: 114 [2020-09-11 16:18:36,280 INFO L226 Difference]: Without dead ends: 108 [2020-09-11 16:18:36,281 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=439, Invalid=1201, Unknown=0, NotChecked=0, Total=1640 [2020-09-11 16:18:36,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-11 16:18:36,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 81. [2020-09-11 16:18:36,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-11 16:18:36,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-11 16:18:36,283 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-11 16:18:36,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:36,283 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-11 16:18:36,283 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 16:18:36,283 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-11 16:18:36,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 16:18:36,284 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:36,284 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:36,487 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-09-11 16:18:36,488 INFO L427 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:36,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:36,488 INFO L82 PathProgramCache]: Analyzing trace with hash 2023402212, now seen corresponding path program 146 times [2020-09-11 16:18:36,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:36,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628343356] [2020-09-11 16:18:36,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:36,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:36,809 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:36,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628343356] [2020-09-11 16:18:36,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454589989] [2020-09-11 16:18:36,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:36,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:18:36,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:36,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 16:18:36,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:36,903 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:18:36,923 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:36,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:36,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-11 16:18:36,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605535112] [2020-09-11 16:18:36,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 16:18:36,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:36,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 16:18:36,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:18:36,925 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-11 16:18:37,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:37,835 INFO L93 Difference]: Finished difference Result 113 states and 269 transitions. [2020-09-11 16:18:37,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 16:18:37,836 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-11 16:18:37,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:37,837 INFO L225 Difference]: With dead ends: 113 [2020-09-11 16:18:37,837 INFO L226 Difference]: Without dead ends: 107 [2020-09-11 16:18:37,837 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=497, Invalid=1395, Unknown=0, NotChecked=0, Total=1892 [2020-09-11 16:18:37,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-09-11 16:18:37,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 80. [2020-09-11 16:18:37,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-11 16:18:37,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-11 16:18:37,839 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-11 16:18:37,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:37,840 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-11 16:18:37,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 16:18:37,840 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-11 16:18:37,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 16:18:37,840 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:37,840 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:38,049 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-09-11 16:18:38,049 INFO L427 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:38,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:38,050 INFO L82 PathProgramCache]: Analyzing trace with hash 406243170, now seen corresponding path program 147 times [2020-09-11 16:18:38,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:38,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34615222] [2020-09-11 16:18:38,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:38,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:38,357 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:38,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34615222] [2020-09-11 16:18:38,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794452149] [2020-09-11 16:18:38,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:38,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-11 16:18:38,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:38,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 16:18:38,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:38,447 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:38,448 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:38,448 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-11 16:18:38,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31458730] [2020-09-11 16:18:38,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 16:18:38,449 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:38,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 16:18:38,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:18:38,449 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-11 16:18:39,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:39,242 INFO L93 Difference]: Finished difference Result 110 states and 263 transitions. [2020-09-11 16:18:39,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-11 16:18:39,243 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-11 16:18:39,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:39,244 INFO L225 Difference]: With dead ends: 110 [2020-09-11 16:18:39,244 INFO L226 Difference]: Without dead ends: 104 [2020-09-11 16:18:39,245 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=480, Invalid=1326, Unknown=0, NotChecked=0, Total=1806 [2020-09-11 16:18:39,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-09-11 16:18:39,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 81. [2020-09-11 16:18:39,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-11 16:18:39,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-11 16:18:39,246 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-11 16:18:39,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:39,246 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-11 16:18:39,247 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 16:18:39,247 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-11 16:18:39,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 16:18:39,247 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:39,247 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:39,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-09-11 16:18:39,448 INFO L427 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:39,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:39,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1663132870, now seen corresponding path program 148 times [2020-09-11 16:18:39,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:39,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909051292] [2020-09-11 16:18:39,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:39,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:39,760 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:39,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909051292] [2020-09-11 16:18:39,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953294425] [2020-09-11 16:18:39,761 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:39,824 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:18:39,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:39,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 16:18:39,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:39,859 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:18:39,875 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:39,876 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:39,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-11 16:18:39,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615752290] [2020-09-11 16:18:39,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 16:18:39,877 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:39,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 16:18:39,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:18:39,877 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-11 16:18:40,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:40,895 INFO L93 Difference]: Finished difference Result 109 states and 261 transitions. [2020-09-11 16:18:40,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-11 16:18:40,896 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-11 16:18:40,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:40,897 INFO L225 Difference]: With dead ends: 109 [2020-09-11 16:18:40,897 INFO L226 Difference]: Without dead ends: 103 [2020-09-11 16:18:40,897 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=545, Invalid=1525, Unknown=0, NotChecked=0, Total=2070 [2020-09-11 16:18:40,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-11 16:18:40,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2020-09-11 16:18:40,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-11 16:18:40,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-11 16:18:40,900 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-11 16:18:40,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:40,900 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-11 16:18:40,900 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 16:18:40,900 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-11 16:18:40,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 16:18:40,901 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:40,901 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:41,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:41,102 INFO L427 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:41,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:41,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1015641916, now seen corresponding path program 149 times [2020-09-11 16:18:41,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:41,103 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525364858] [2020-09-11 16:18:41,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:41,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:41,397 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:41,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525364858] [2020-09-11 16:18:41,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591957744] [2020-09-11 16:18:41,398 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:41,462 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-11 16:18:41,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:41,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 16:18:41,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:41,483 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:41,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:41,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-11 16:18:41,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780928378] [2020-09-11 16:18:41,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 16:18:41,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:41,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 16:18:41,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:18:41,485 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-11 16:18:42,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:42,364 INFO L93 Difference]: Finished difference Result 106 states and 255 transitions. [2020-09-11 16:18:42,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-11 16:18:42,365 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-11 16:18:42,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:42,366 INFO L225 Difference]: With dead ends: 106 [2020-09-11 16:18:42,366 INFO L226 Difference]: Without dead ends: 100 [2020-09-11 16:18:42,367 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=537, Invalid=1443, Unknown=0, NotChecked=0, Total=1980 [2020-09-11 16:18:42,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-11 16:18:42,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 81. [2020-09-11 16:18:42,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-11 16:18:42,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-11 16:18:42,369 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-11 16:18:42,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:42,369 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-11 16:18:42,369 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 16:18:42,370 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-11 16:18:42,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 16:18:42,370 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:42,370 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:42,570 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2020-09-11 16:18:42,571 INFO L427 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:42,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:42,571 INFO L82 PathProgramCache]: Analyzing trace with hash -495898840, now seen corresponding path program 150 times [2020-09-11 16:18:42,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:42,572 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278081017] [2020-09-11 16:18:42,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:42,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:42,866 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:42,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278081017] [2020-09-11 16:18:42,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908952117] [2020-09-11 16:18:42,867 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:42,936 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-11 16:18:42,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:42,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 16:18:42,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:42,967 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:18:42,985 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:42,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:42,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-11 16:18:42,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668321758] [2020-09-11 16:18:42,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 16:18:42,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:42,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 16:18:42,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:18:42,986 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-11 16:18:44,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:44,118 INFO L93 Difference]: Finished difference Result 105 states and 253 transitions. [2020-09-11 16:18:44,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-11 16:18:44,119 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-11 16:18:44,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:44,119 INFO L225 Difference]: With dead ends: 105 [2020-09-11 16:18:44,119 INFO L226 Difference]: Without dead ends: 99 [2020-09-11 16:18:44,120 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=609, Invalid=1647, Unknown=0, NotChecked=0, Total=2256 [2020-09-11 16:18:44,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-09-11 16:18:44,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 80. [2020-09-11 16:18:44,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-11 16:18:44,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-11 16:18:44,122 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-11 16:18:44,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:44,122 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-11 16:18:44,122 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 16:18:44,122 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-11 16:18:44,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 16:18:44,122 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:44,122 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:44,323 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:44,323 INFO L427 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:44,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:44,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1159412390, now seen corresponding path program 151 times [2020-09-11 16:18:44,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:44,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048943106] [2020-09-11 16:18:44,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:44,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:44,609 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:44,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048943106] [2020-09-11 16:18:44,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314887666] [2020-09-11 16:18:44,610 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:44,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:44,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 16:18:44,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:44,697 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:44,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:44,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-11 16:18:44,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094144466] [2020-09-11 16:18:44,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 16:18:44,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:44,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 16:18:44,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:18:44,699 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-11 16:18:45,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:45,656 INFO L93 Difference]: Finished difference Result 102 states and 247 transitions. [2020-09-11 16:18:45,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-11 16:18:45,657 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-11 16:18:45,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:45,657 INFO L225 Difference]: With dead ends: 102 [2020-09-11 16:18:45,658 INFO L226 Difference]: Without dead ends: 96 [2020-09-11 16:18:45,658 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=610, Invalid=1552, Unknown=0, NotChecked=0, Total=2162 [2020-09-11 16:18:45,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-11 16:18:45,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 81. [2020-09-11 16:18:45,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-11 16:18:45,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-11 16:18:45,660 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-11 16:18:45,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:45,660 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-11 16:18:45,660 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 16:18:45,660 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-11 16:18:45,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 16:18:45,660 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:45,661 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:45,861 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:45,861 INFO L427 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:45,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:45,862 INFO L82 PathProgramCache]: Analyzing trace with hash -560715254, now seen corresponding path program 152 times [2020-09-11 16:18:45,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:45,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312217698] [2020-09-11 16:18:45,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:45,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:46,145 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:46,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312217698] [2020-09-11 16:18:46,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909860204] [2020-09-11 16:18:46,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:46,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:18:46,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:46,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 16:18:46,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:46,243 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:18:46,261 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:46,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:46,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-11 16:18:46,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293036154] [2020-09-11 16:18:46,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 16:18:46,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:46,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 16:18:46,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:18:46,263 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-11 16:18:47,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:47,512 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-09-11 16:18:47,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-11 16:18:47,513 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-11 16:18:47,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:47,514 INFO L225 Difference]: With dead ends: 101 [2020-09-11 16:18:47,514 INFO L226 Difference]: Without dead ends: 95 [2020-09-11 16:18:47,515 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=689, Invalid=1761, Unknown=0, NotChecked=0, Total=2450 [2020-09-11 16:18:47,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-11 16:18:47,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 80. [2020-09-11 16:18:47,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-11 16:18:47,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-11 16:18:47,517 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-11 16:18:47,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:47,517 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-11 16:18:47,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 16:18:47,517 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-11 16:18:47,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 16:18:47,518 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:47,518 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:47,720 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable153 [2020-09-11 16:18:47,721 INFO L427 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:47,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:47,721 INFO L82 PathProgramCache]: Analyzing trace with hash -89719544, now seen corresponding path program 153 times [2020-09-11 16:18:47,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:47,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635319186] [2020-09-11 16:18:47,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:47,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:47,968 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:47,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635319186] [2020-09-11 16:18:47,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975083850] [2020-09-11 16:18:47,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:48,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-11 16:18:48,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:48,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 16:18:48,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:48,058 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:48,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:48,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-11 16:18:48,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928399982] [2020-09-11 16:18:48,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 16:18:48,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:48,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 16:18:48,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:18:48,060 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-11 16:18:49,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:49,104 INFO L93 Difference]: Finished difference Result 98 states and 239 transitions. [2020-09-11 16:18:49,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-11 16:18:49,105 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-11 16:18:49,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:49,106 INFO L225 Difference]: With dead ends: 98 [2020-09-11 16:18:49,106 INFO L226 Difference]: Without dead ends: 92 [2020-09-11 16:18:49,106 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=699, Invalid=1653, Unknown=0, NotChecked=0, Total=2352 [2020-09-11 16:18:49,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-11 16:18:49,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 81. [2020-09-11 16:18:49,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-11 16:18:49,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-11 16:18:49,108 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-11 16:18:49,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:49,108 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-11 16:18:49,108 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 16:18:49,108 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-11 16:18:49,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 16:18:49,109 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:49,109 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:49,309 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:49,310 INFO L427 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:49,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:49,310 INFO L82 PathProgramCache]: Analyzing trace with hash -73632404, now seen corresponding path program 154 times [2020-09-11 16:18:49,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:49,311 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926756280] [2020-09-11 16:18:49,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:49,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:49,589 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:49,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926756280] [2020-09-11 16:18:49,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033504816] [2020-09-11 16:18:49,590 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:49,649 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:18:49,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:49,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 16:18:49,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:49,679 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:18:49,699 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:49,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:49,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-11 16:18:49,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786417533] [2020-09-11 16:18:49,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 16:18:49,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:49,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 16:18:49,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:18:49,701 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-11 16:18:51,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:51,062 INFO L93 Difference]: Finished difference Result 97 states and 237 transitions. [2020-09-11 16:18:51,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-11 16:18:51,063 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-11 16:18:51,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:51,063 INFO L225 Difference]: With dead ends: 97 [2020-09-11 16:18:51,064 INFO L226 Difference]: Without dead ends: 91 [2020-09-11 16:18:51,064 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=785, Invalid=1867, Unknown=0, NotChecked=0, Total=2652 [2020-09-11 16:18:51,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-11 16:18:51,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2020-09-11 16:18:51,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-11 16:18:51,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-11 16:18:51,066 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-11 16:18:51,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:51,067 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-11 16:18:51,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 16:18:51,067 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-11 16:18:51,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 16:18:51,067 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:51,067 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:51,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-09-11 16:18:51,269 INFO L427 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:51,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:51,269 INFO L82 PathProgramCache]: Analyzing trace with hash -73142294, now seen corresponding path program 155 times [2020-09-11 16:18:51,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:51,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63778095] [2020-09-11 16:18:51,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:51,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:51,548 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:51,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63778095] [2020-09-11 16:18:51,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961443704] [2020-09-11 16:18:51,549 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:51,614 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-11 16:18:51,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:51,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 16:18:51,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:51,641 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:51,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:51,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-11 16:18:51,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230297202] [2020-09-11 16:18:51,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 16:18:51,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:51,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 16:18:51,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:18:51,642 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-11 16:18:52,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:52,753 INFO L93 Difference]: Finished difference Result 113 states and 277 transitions. [2020-09-11 16:18:52,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-11 16:18:52,754 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-11 16:18:52,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:52,754 INFO L225 Difference]: With dead ends: 113 [2020-09-11 16:18:52,754 INFO L226 Difference]: Without dead ends: 107 [2020-09-11 16:18:52,755 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=804, Invalid=1746, Unknown=0, NotChecked=0, Total=2550 [2020-09-11 16:18:52,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-09-11 16:18:52,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 84. [2020-09-11 16:18:52,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-11 16:18:52,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 217 transitions. [2020-09-11 16:18:52,757 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 217 transitions. Word has length 24 [2020-09-11 16:18:52,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:52,757 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 217 transitions. [2020-09-11 16:18:52,759 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 16:18:52,759 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 217 transitions. [2020-09-11 16:18:52,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 16:18:52,759 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:52,760 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:52,960 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-09-11 16:18:52,961 INFO L427 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:52,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:52,961 INFO L82 PathProgramCache]: Analyzing trace with hash -73125554, now seen corresponding path program 156 times [2020-09-11 16:18:52,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:52,962 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416424915] [2020-09-11 16:18:52,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:52,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:53,241 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:53,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416424915] [2020-09-11 16:18:53,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871660937] [2020-09-11 16:18:53,242 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:53,309 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-11 16:18:53,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:53,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 16:18:53,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:53,353 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:18:53,370 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:53,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:53,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-11 16:18:53,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246610307] [2020-09-11 16:18:53,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 16:18:53,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:53,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 16:18:53,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:18:53,372 INFO L87 Difference]: Start difference. First operand 84 states and 217 transitions. Second operand 21 states. [2020-09-11 16:18:54,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:54,772 INFO L93 Difference]: Finished difference Result 94 states and 233 transitions. [2020-09-11 16:18:54,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-11 16:18:54,773 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-11 16:18:54,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:54,774 INFO L225 Difference]: With dead ends: 94 [2020-09-11 16:18:54,774 INFO L226 Difference]: Without dead ends: 86 [2020-09-11 16:18:54,775 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=897, Invalid=1965, Unknown=0, NotChecked=0, Total=2862 [2020-09-11 16:18:54,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-11 16:18:54,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 61. [2020-09-11 16:18:54,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-11 16:18:54,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 148 transitions. [2020-09-11 16:18:54,777 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 148 transitions. Word has length 24 [2020-09-11 16:18:54,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:54,777 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 148 transitions. [2020-09-11 16:18:54,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 16:18:54,777 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 148 transitions. [2020-09-11 16:18:54,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 16:18:54,777 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:54,777 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:54,978 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-09-11 16:18:54,978 INFO L427 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:54,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:54,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1614805552, now seen corresponding path program 157 times [2020-09-11 16:18:54,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:54,979 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845190898] [2020-09-11 16:18:54,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:54,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:55,264 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:55,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845190898] [2020-09-11 16:18:55,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115821761] [2020-09-11 16:18:55,264 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:55,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:55,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 16:18:55,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:55,353 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:18:55,377 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:55,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:55,378 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-11 16:18:55,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025384819] [2020-09-11 16:18:55,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 16:18:55,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:55,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 16:18:55,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:18:55,379 INFO L87 Difference]: Start difference. First operand 61 states and 148 transitions. Second operand 21 states. [2020-09-11 16:18:56,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:56,681 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-09-11 16:18:56,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-11 16:18:56,682 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-11 16:18:56,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:56,682 INFO L225 Difference]: With dead ends: 108 [2020-09-11 16:18:56,682 INFO L226 Difference]: Without dead ends: 103 [2020-09-11 16:18:56,683 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=938, Invalid=1924, Unknown=0, NotChecked=0, Total=2862 [2020-09-11 16:18:56,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-11 16:18:56,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 82. [2020-09-11 16:18:56,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-11 16:18:56,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-09-11 16:18:56,685 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 24 [2020-09-11 16:18:56,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:56,685 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-09-11 16:18:56,685 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 16:18:56,686 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-09-11 16:18:56,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 16:18:56,686 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:56,686 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:56,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-09-11 16:18:56,887 INFO L427 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:56,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:56,887 INFO L82 PathProgramCache]: Analyzing trace with hash 2028091429, now seen corresponding path program 158 times [2020-09-11 16:18:56,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:56,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992826951] [2020-09-11 16:18:56,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:56,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:57,197 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:57,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992826951] [2020-09-11 16:18:57,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141858239] [2020-09-11 16:18:57,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:57,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:18:57,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:57,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 16:18:57,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:57,291 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:18:57,313 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:57,313 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:57,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-11 16:18:57,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064031843] [2020-09-11 16:18:57,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 16:18:57,314 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:57,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 16:18:57,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:18:57,314 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 22 states. [2020-09-11 16:18:58,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:58,715 INFO L93 Difference]: Finished difference Result 90 states and 229 transitions. [2020-09-11 16:18:58,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-11 16:18:58,716 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-11 16:18:58,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:58,717 INFO L225 Difference]: With dead ends: 90 [2020-09-11 16:18:58,717 INFO L226 Difference]: Without dead ends: 85 [2020-09-11 16:18:58,717 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=955, Invalid=2015, Unknown=0, NotChecked=0, Total=2970 [2020-09-11 16:18:58,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-11 16:18:58,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-09-11 16:18:58,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-11 16:18:58,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 152 transitions. [2020-09-11 16:18:58,720 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 152 transitions. Word has length 25 [2020-09-11 16:18:58,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:58,720 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 152 transitions. [2020-09-11 16:18:58,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 16:18:58,720 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 152 transitions. [2020-09-11 16:18:58,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 16:18:58,720 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:58,721 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:58,921 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:58,921 INFO L427 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:58,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:58,922 INFO L82 PathProgramCache]: Analyzing trace with hash 674366672, now seen corresponding path program 159 times [2020-09-11 16:18:58,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:58,922 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569353981] [2020-09-11 16:18:58,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:58,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:59,320 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:59,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569353981] [2020-09-11 16:18:59,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408260718] [2020-09-11 16:18:59,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:59,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-11 16:18:59,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:59,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 16:18:59,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:59,400 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:59,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:59,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-11 16:18:59,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434664726] [2020-09-11 16:18:59,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 16:18:59,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:59,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 16:18:59,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:18:59,401 INFO L87 Difference]: Start difference. First operand 62 states and 152 transitions. Second operand 21 states. [2020-09-11 16:19:00,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:00,013 INFO L93 Difference]: Finished difference Result 96 states and 223 transitions. [2020-09-11 16:19:00,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-11 16:19:00,014 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-11 16:19:00,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:00,015 INFO L225 Difference]: With dead ends: 96 [2020-09-11 16:19:00,015 INFO L226 Difference]: Without dead ends: 90 [2020-09-11 16:19:00,015 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=453, Invalid=953, Unknown=0, NotChecked=0, Total=1406 [2020-09-11 16:19:00,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-11 16:19:00,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 70. [2020-09-11 16:19:00,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-11 16:19:00,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 171 transitions. [2020-09-11 16:19:00,017 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 171 transitions. Word has length 25 [2020-09-11 16:19:00,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:00,017 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 171 transitions. [2020-09-11 16:19:00,017 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 16:19:00,017 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 171 transitions. [2020-09-11 16:19:00,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 16:19:00,017 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:00,018 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:00,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:00,219 INFO L427 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:00,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:00,219 INFO L82 PathProgramCache]: Analyzing trace with hash -873791948, now seen corresponding path program 160 times [2020-09-11 16:19:00,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:00,220 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463623784] [2020-09-11 16:19:00,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:00,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:00,594 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:00,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463623784] [2020-09-11 16:19:00,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004278464] [2020-09-11 16:19:00,595 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:00,658 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:19:00,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:00,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 16:19:00,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:00,688 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:19:00,701 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:00,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:00,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-11 16:19:00,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006326856] [2020-09-11 16:19:00,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 16:19:00,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:00,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 16:19:00,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:19:00,702 INFO L87 Difference]: Start difference. First operand 70 states and 171 transitions. Second operand 22 states. [2020-09-11 16:19:01,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:01,395 INFO L93 Difference]: Finished difference Result 114 states and 259 transitions. [2020-09-11 16:19:01,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 16:19:01,396 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-11 16:19:01,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:01,397 INFO L225 Difference]: With dead ends: 114 [2020-09-11 16:19:01,397 INFO L226 Difference]: Without dead ends: 108 [2020-09-11 16:19:01,398 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=462, Invalid=1098, Unknown=0, NotChecked=0, Total=1560 [2020-09-11 16:19:01,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-11 16:19:01,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 68. [2020-09-11 16:19:01,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-11 16:19:01,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 167 transitions. [2020-09-11 16:19:01,400 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 167 transitions. Word has length 25 [2020-09-11 16:19:01,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:01,401 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 167 transitions. [2020-09-11 16:19:01,401 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 16:19:01,401 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 167 transitions. [2020-09-11 16:19:01,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 16:19:01,402 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:01,402 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:01,610 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:01,610 INFO L427 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:01,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:01,611 INFO L82 PathProgramCache]: Analyzing trace with hash 2119386162, now seen corresponding path program 161 times [2020-09-11 16:19:01,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:01,611 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393122176] [2020-09-11 16:19:01,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:01,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:02,003 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:02,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393122176] [2020-09-11 16:19:02,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436763311] [2020-09-11 16:19:02,004 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:02,069 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-11 16:19:02,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:02,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 16:19:02,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:02,101 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:02,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:02,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-11 16:19:02,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500437308] [2020-09-11 16:19:02,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 16:19:02,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:02,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 16:19:02,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:19:02,103 INFO L87 Difference]: Start difference. First operand 68 states and 167 transitions. Second operand 21 states. [2020-09-11 16:19:02,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:02,853 INFO L93 Difference]: Finished difference Result 115 states and 263 transitions. [2020-09-11 16:19:02,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-11 16:19:02,854 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-11 16:19:02,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:02,854 INFO L225 Difference]: With dead ends: 115 [2020-09-11 16:19:02,854 INFO L226 Difference]: Without dead ends: 109 [2020-09-11 16:19:02,855 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=466, Invalid=1174, Unknown=0, NotChecked=0, Total=1640 [2020-09-11 16:19:02,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-11 16:19:02,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 71. [2020-09-11 16:19:02,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-11 16:19:02,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 175 transitions. [2020-09-11 16:19:02,857 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 175 transitions. Word has length 25 [2020-09-11 16:19:02,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:02,858 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 175 transitions. [2020-09-11 16:19:02,858 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 16:19:02,858 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 175 transitions. [2020-09-11 16:19:02,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 16:19:02,858 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:02,858 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:03,059 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:03,059 INFO L427 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:03,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:03,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1308837526, now seen corresponding path program 162 times [2020-09-11 16:19:03,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:03,060 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491778448] [2020-09-11 16:19:03,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:03,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:03,450 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:03,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491778448] [2020-09-11 16:19:03,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545962655] [2020-09-11 16:19:03,450 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:03,518 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-11 16:19:03,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:03,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 16:19:03,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:03,556 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:19:03,570 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:03,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:03,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-11 16:19:03,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295086603] [2020-09-11 16:19:03,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 16:19:03,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:03,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 16:19:03,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:19:03,572 INFO L87 Difference]: Start difference. First operand 71 states and 175 transitions. Second operand 22 states. [2020-09-11 16:19:04,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:04,326 INFO L93 Difference]: Finished difference Result 129 states and 291 transitions. [2020-09-11 16:19:04,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 16:19:04,327 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-11 16:19:04,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:04,328 INFO L225 Difference]: With dead ends: 129 [2020-09-11 16:19:04,328 INFO L226 Difference]: Without dead ends: 123 [2020-09-11 16:19:04,329 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=500, Invalid=1306, Unknown=0, NotChecked=0, Total=1806 [2020-09-11 16:19:04,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-11 16:19:04,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 70. [2020-09-11 16:19:04,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-11 16:19:04,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 173 transitions. [2020-09-11 16:19:04,332 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 173 transitions. Word has length 25 [2020-09-11 16:19:04,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:04,332 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 173 transitions. [2020-09-11 16:19:04,332 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 16:19:04,332 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 173 transitions. [2020-09-11 16:19:04,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 16:19:04,332 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:04,332 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:04,540 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:04,540 INFO L427 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:04,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:04,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1361114132, now seen corresponding path program 163 times [2020-09-11 16:19:04,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:04,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064411819] [2020-09-11 16:19:04,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:04,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:04,910 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:04,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064411819] [2020-09-11 16:19:04,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220035574] [2020-09-11 16:19:04,911 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:04,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:04,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 16:19:04,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:04,990 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:04,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:04,990 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-11 16:19:04,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146533744] [2020-09-11 16:19:04,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 16:19:04,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:04,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 16:19:04,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:19:04,991 INFO L87 Difference]: Start difference. First operand 70 states and 173 transitions. Second operand 21 states. [2020-09-11 16:19:05,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:05,806 INFO L93 Difference]: Finished difference Result 129 states and 293 transitions. [2020-09-11 16:19:05,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-11 16:19:05,807 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-11 16:19:05,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:05,807 INFO L225 Difference]: With dead ends: 129 [2020-09-11 16:19:05,807 INFO L226 Difference]: Without dead ends: 123 [2020-09-11 16:19:05,808 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=518, Invalid=1374, Unknown=0, NotChecked=0, Total=1892 [2020-09-11 16:19:05,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-11 16:19:05,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 73. [2020-09-11 16:19:05,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-11 16:19:05,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 181 transitions. [2020-09-11 16:19:05,809 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 181 transitions. Word has length 25 [2020-09-11 16:19:05,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:05,809 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 181 transitions. [2020-09-11 16:19:05,809 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 16:19:05,809 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 181 transitions. [2020-09-11 16:19:05,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 16:19:05,810 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:05,810 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:06,010 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:06,011 INFO L427 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:06,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:06,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1057603720, now seen corresponding path program 164 times [2020-09-11 16:19:06,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:06,012 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612770010] [2020-09-11 16:19:06,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:06,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:06,387 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:06,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612770010] [2020-09-11 16:19:06,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525335206] [2020-09-11 16:19:06,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:06,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:19:06,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:06,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 16:19:06,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:06,490 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:19:06,511 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:06,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:06,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-11 16:19:06,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524226346] [2020-09-11 16:19:06,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 16:19:06,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:06,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 16:19:06,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:19:06,513 INFO L87 Difference]: Start difference. First operand 73 states and 181 transitions. Second operand 22 states. [2020-09-11 16:19:07,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:07,430 INFO L93 Difference]: Finished difference Result 126 states and 287 transitions. [2020-09-11 16:19:07,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 16:19:07,431 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-11 16:19:07,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:07,431 INFO L225 Difference]: With dead ends: 126 [2020-09-11 16:19:07,432 INFO L226 Difference]: Without dead ends: 120 [2020-09-11 16:19:07,432 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=523, Invalid=1457, Unknown=0, NotChecked=0, Total=1980 [2020-09-11 16:19:07,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-09-11 16:19:07,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 72. [2020-09-11 16:19:07,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-11 16:19:07,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 179 transitions. [2020-09-11 16:19:07,435 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 179 transitions. Word has length 25 [2020-09-11 16:19:07,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:07,435 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 179 transitions. [2020-09-11 16:19:07,435 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 16:19:07,436 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 179 transitions. [2020-09-11 16:19:07,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 16:19:07,436 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:07,436 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:07,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:07,638 INFO L427 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:07,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:07,639 INFO L82 PathProgramCache]: Analyzing trace with hash -369281930, now seen corresponding path program 165 times [2020-09-11 16:19:07,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:07,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741395518] [2020-09-11 16:19:07,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:07,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:07,984 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:07,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741395518] [2020-09-11 16:19:07,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230340693] [2020-09-11 16:19:07,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:08,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-11 16:19:08,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:08,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 16:19:08,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:08,074 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:08,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:08,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-11 16:19:08,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951435402] [2020-09-11 16:19:08,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 16:19:08,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:08,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 16:19:08,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:19:08,075 INFO L87 Difference]: Start difference. First operand 72 states and 179 transitions. Second operand 21 states. [2020-09-11 16:19:08,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:08,961 INFO L93 Difference]: Finished difference Result 127 states and 291 transitions. [2020-09-11 16:19:08,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-11 16:19:08,962 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-11 16:19:08,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:08,963 INFO L225 Difference]: With dead ends: 127 [2020-09-11 16:19:08,963 INFO L226 Difference]: Without dead ends: 121 [2020-09-11 16:19:08,963 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=556, Invalid=1514, Unknown=0, NotChecked=0, Total=2070 [2020-09-11 16:19:08,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-11 16:19:08,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 75. [2020-09-11 16:19:08,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-11 16:19:08,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 187 transitions. [2020-09-11 16:19:08,965 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 187 transitions. Word has length 25 [2020-09-11 16:19:08,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:08,966 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 187 transitions. [2020-09-11 16:19:08,966 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 16:19:08,966 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 187 transitions. [2020-09-11 16:19:08,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 16:19:08,966 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:08,966 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:09,167 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-09-11 16:19:09,167 INFO L427 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:09,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:09,168 INFO L82 PathProgramCache]: Analyzing trace with hash 615909594, now seen corresponding path program 166 times [2020-09-11 16:19:09,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:09,168 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175841778] [2020-09-11 16:19:09,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:09,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:09,523 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:09,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175841778] [2020-09-11 16:19:09,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006012595] [2020-09-11 16:19:09,524 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:09,587 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:19:09,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:09,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 16:19:09,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:09,617 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:19:09,634 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:09,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:09,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-11 16:19:09,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683469560] [2020-09-11 16:19:09,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 16:19:09,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:09,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 16:19:09,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:19:09,636 INFO L87 Difference]: Start difference. First operand 75 states and 187 transitions. Second operand 22 states. [2020-09-11 16:19:10,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:10,665 INFO L93 Difference]: Finished difference Result 124 states and 285 transitions. [2020-09-11 16:19:10,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-11 16:19:10,666 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-11 16:19:10,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:10,667 INFO L225 Difference]: With dead ends: 124 [2020-09-11 16:19:10,667 INFO L226 Difference]: Without dead ends: 118 [2020-09-11 16:19:10,667 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=562, Invalid=1600, Unknown=0, NotChecked=0, Total=2162 [2020-09-11 16:19:10,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-11 16:19:10,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 74. [2020-09-11 16:19:10,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-11 16:19:10,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 185 transitions. [2020-09-11 16:19:10,669 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 185 transitions. Word has length 25 [2020-09-11 16:19:10,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:10,670 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 185 transitions. [2020-09-11 16:19:10,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 16:19:10,670 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 185 transitions. [2020-09-11 16:19:10,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 16:19:10,670 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:10,670 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:10,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2020-09-11 16:19:10,871 INFO L427 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:10,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:10,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1001249448, now seen corresponding path program 167 times [2020-09-11 16:19:10,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:10,872 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893553104] [2020-09-11 16:19:10,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:10,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:11,192 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:11,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893553104] [2020-09-11 16:19:11,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468543392] [2020-09-11 16:19:11,192 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:11,260 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-11 16:19:11,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:11,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 16:19:11,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:11,282 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:11,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:11,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-11 16:19:11,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910826473] [2020-09-11 16:19:11,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 16:19:11,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:11,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 16:19:11,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:19:11,284 INFO L87 Difference]: Start difference. First operand 74 states and 185 transitions. Second operand 21 states. [2020-09-11 16:19:12,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:12,197 INFO L93 Difference]: Finished difference Result 125 states and 289 transitions. [2020-09-11 16:19:12,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-11 16:19:12,198 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-11 16:19:12,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:12,198 INFO L225 Difference]: With dead ends: 125 [2020-09-11 16:19:12,198 INFO L226 Difference]: Without dead ends: 119 [2020-09-11 16:19:12,199 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=610, Invalid=1646, Unknown=0, NotChecked=0, Total=2256 [2020-09-11 16:19:12,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-09-11 16:19:12,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 77. [2020-09-11 16:19:12,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-11 16:19:12,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 193 transitions. [2020-09-11 16:19:12,200 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 193 transitions. Word has length 25 [2020-09-11 16:19:12,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:12,201 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 193 transitions. [2020-09-11 16:19:12,201 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 16:19:12,201 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 193 transitions. [2020-09-11 16:19:12,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 16:19:12,201 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:12,201 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:12,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-09-11 16:19:12,403 INFO L427 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:12,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:12,404 INFO L82 PathProgramCache]: Analyzing trace with hash 255640252, now seen corresponding path program 168 times [2020-09-11 16:19:12,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:12,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586074818] [2020-09-11 16:19:12,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:12,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:12,730 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:12,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586074818] [2020-09-11 16:19:12,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962171059] [2020-09-11 16:19:12,731 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:12,803 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-11 16:19:12,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:12,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 16:19:12,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:12,836 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:19:12,854 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:12,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:12,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-11 16:19:12,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034814312] [2020-09-11 16:19:12,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 16:19:12,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:12,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 16:19:12,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:19:12,855 INFO L87 Difference]: Start difference. First operand 77 states and 193 transitions. Second operand 22 states. [2020-09-11 16:19:13,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:13,987 INFO L93 Difference]: Finished difference Result 122 states and 283 transitions. [2020-09-11 16:19:13,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-11 16:19:13,988 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-11 16:19:13,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:13,989 INFO L225 Difference]: With dead ends: 122 [2020-09-11 16:19:13,989 INFO L226 Difference]: Without dead ends: 116 [2020-09-11 16:19:13,989 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=617, Invalid=1735, Unknown=0, NotChecked=0, Total=2352 [2020-09-11 16:19:13,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-09-11 16:19:13,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 76. [2020-09-11 16:19:13,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-11 16:19:13,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 191 transitions. [2020-09-11 16:19:13,992 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 191 transitions. Word has length 25 [2020-09-11 16:19:13,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:13,992 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 191 transitions. [2020-09-11 16:19:13,992 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 16:19:13,992 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 191 transitions. [2020-09-11 16:19:13,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 16:19:13,992 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:13,992 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:14,195 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-09-11 16:19:14,195 INFO L427 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:14,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:14,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1871832762, now seen corresponding path program 169 times [2020-09-11 16:19:14,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:14,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613775976] [2020-09-11 16:19:14,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:14,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:14,520 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:14,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613775976] [2020-09-11 16:19:14,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313728620] [2020-09-11 16:19:14,520 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:14,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:14,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 16:19:14,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:14,605 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:14,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:14,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-11 16:19:14,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732158410] [2020-09-11 16:19:14,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 16:19:14,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:14,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 16:19:14,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:19:14,606 INFO L87 Difference]: Start difference. First operand 76 states and 191 transitions. Second operand 21 states. [2020-09-11 16:19:15,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:15,625 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-09-11 16:19:15,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-11 16:19:15,625 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-11 16:19:15,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:15,626 INFO L225 Difference]: With dead ends: 123 [2020-09-11 16:19:15,626 INFO L226 Difference]: Without dead ends: 117 [2020-09-11 16:19:15,626 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=680, Invalid=1770, Unknown=0, NotChecked=0, Total=2450 [2020-09-11 16:19:15,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-11 16:19:15,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 79. [2020-09-11 16:19:15,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-11 16:19:15,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 199 transitions. [2020-09-11 16:19:15,628 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 199 transitions. Word has length 25 [2020-09-11 16:19:15,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:15,629 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 199 transitions. [2020-09-11 16:19:15,629 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 16:19:15,629 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 199 transitions. [2020-09-11 16:19:15,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 16:19:15,629 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:15,629 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:15,830 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:15,830 INFO L427 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:15,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:15,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1903391458, now seen corresponding path program 170 times [2020-09-11 16:19:15,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:15,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468171963] [2020-09-11 16:19:15,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:15,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:16,159 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:16,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468171963] [2020-09-11 16:19:16,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583427606] [2020-09-11 16:19:16,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:16,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:19:16,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:16,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 16:19:16,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:16,256 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:19:16,274 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:16,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:16,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-11 16:19:16,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475675731] [2020-09-11 16:19:16,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 16:19:16,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:16,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 16:19:16,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:19:16,276 INFO L87 Difference]: Start difference. First operand 79 states and 199 transitions. Second operand 22 states. [2020-09-11 16:19:17,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:17,505 INFO L93 Difference]: Finished difference Result 120 states and 281 transitions. [2020-09-11 16:19:17,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-11 16:19:17,506 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-11 16:19:17,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:17,506 INFO L225 Difference]: With dead ends: 120 [2020-09-11 16:19:17,507 INFO L226 Difference]: Without dead ends: 114 [2020-09-11 16:19:17,507 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=688, Invalid=1862, Unknown=0, NotChecked=0, Total=2550 [2020-09-11 16:19:17,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-09-11 16:19:17,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 78. [2020-09-11 16:19:17,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-11 16:19:17,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 197 transitions. [2020-09-11 16:19:17,509 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 197 transitions. Word has length 25 [2020-09-11 16:19:17,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:17,509 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 197 transitions. [2020-09-11 16:19:17,510 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 16:19:17,510 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 197 transitions. [2020-09-11 16:19:17,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 16:19:17,510 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:17,510 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:17,710 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:17,711 INFO L427 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:17,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:17,711 INFO L82 PathProgramCache]: Analyzing trace with hash -248080228, now seen corresponding path program 171 times [2020-09-11 16:19:17,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:17,712 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275533846] [2020-09-11 16:19:17,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:17,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:18,034 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:18,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275533846] [2020-09-11 16:19:18,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632547108] [2020-09-11 16:19:18,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:18,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-11 16:19:18,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:18,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 16:19:18,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:18,143 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:18,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:18,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-11 16:19:18,144 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158684406] [2020-09-11 16:19:18,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 16:19:18,145 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:18,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 16:19:18,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:19:18,145 INFO L87 Difference]: Start difference. First operand 78 states and 197 transitions. Second operand 21 states. [2020-09-11 16:19:19,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:19,241 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-09-11 16:19:19,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-11 16:19:19,242 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-11 16:19:19,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:19,243 INFO L225 Difference]: With dead ends: 121 [2020-09-11 16:19:19,243 INFO L226 Difference]: Without dead ends: 115 [2020-09-11 16:19:19,243 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=766, Invalid=1886, Unknown=0, NotChecked=0, Total=2652 [2020-09-11 16:19:19,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-11 16:19:19,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 81. [2020-09-11 16:19:19,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-11 16:19:19,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-11 16:19:19,245 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 25 [2020-09-11 16:19:19,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:19,245 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-11 16:19:19,245 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 16:19:19,245 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-11 16:19:19,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 16:19:19,246 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:19,246 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:19,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2020-09-11 16:19:19,447 INFO L427 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:19,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:19,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1968207872, now seen corresponding path program 172 times [2020-09-11 16:19:19,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:19,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014722311] [2020-09-11 16:19:19,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:19,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:19,756 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:19,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014722311] [2020-09-11 16:19:19,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680522311] [2020-09-11 16:19:19,757 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:19,818 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:19:19,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:19,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 16:19:19,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:19,860 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:19:19,883 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:19,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:19,883 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-11 16:19:19,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228253748] [2020-09-11 16:19:19,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 16:19:19,884 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:19,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 16:19:19,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:19:19,885 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 22 states. [2020-09-11 16:19:21,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:21,211 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-09-11 16:19:21,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-11 16:19:21,212 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-11 16:19:21,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:21,212 INFO L225 Difference]: With dead ends: 118 [2020-09-11 16:19:21,212 INFO L226 Difference]: Without dead ends: 112 [2020-09-11 16:19:21,213 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=775, Invalid=1981, Unknown=0, NotChecked=0, Total=2756 [2020-09-11 16:19:21,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-11 16:19:21,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 80. [2020-09-11 16:19:21,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-11 16:19:21,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-11 16:19:21,215 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 25 [2020-09-11 16:19:21,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:21,215 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-11 16:19:21,215 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 16:19:21,215 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-11 16:19:21,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 16:19:21,216 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:21,216 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:21,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:21,417 INFO L427 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:21,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:21,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1497212162, now seen corresponding path program 173 times [2020-09-11 16:19:21,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:21,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143303849] [2020-09-11 16:19:21,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:21,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:21,722 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:21,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143303849] [2020-09-11 16:19:21,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795461964] [2020-09-11 16:19:21,723 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:21,789 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-11 16:19:21,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:21,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 16:19:21,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:21,819 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:21,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:21,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-11 16:19:21,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152319781] [2020-09-11 16:19:21,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 16:19:21,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:21,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 16:19:21,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:19:21,821 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 21 states. [2020-09-11 16:19:22,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:22,982 INFO L93 Difference]: Finished difference Result 119 states and 283 transitions. [2020-09-11 16:19:22,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-11 16:19:22,983 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-11 16:19:22,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:22,984 INFO L225 Difference]: With dead ends: 119 [2020-09-11 16:19:22,987 INFO L226 Difference]: Without dead ends: 113 [2020-09-11 16:19:22,987 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=868, Invalid=1994, Unknown=0, NotChecked=0, Total=2862 [2020-09-11 16:19:22,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-11 16:19:22,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 83. [2020-09-11 16:19:22,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-11 16:19:22,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 211 transitions. [2020-09-11 16:19:22,989 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 211 transitions. Word has length 25 [2020-09-11 16:19:22,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:22,990 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 211 transitions. [2020-09-11 16:19:22,990 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 16:19:22,990 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 211 transitions. [2020-09-11 16:19:22,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 16:19:22,990 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:22,990 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:23,199 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:23,199 INFO L427 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:23,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:23,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1481125022, now seen corresponding path program 174 times [2020-09-11 16:19:23,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:23,200 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995279928] [2020-09-11 16:19:23,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:23,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:23,507 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:23,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995279928] [2020-09-11 16:19:23,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118645701] [2020-09-11 16:19:23,508 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:23,573 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-11 16:19:23,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:23,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 16:19:23,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:23,613 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:19:23,636 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:23,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:23,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-11 16:19:23,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505452023] [2020-09-11 16:19:23,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 16:19:23,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:23,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 16:19:23,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:19:23,637 INFO L87 Difference]: Start difference. First operand 83 states and 211 transitions. Second operand 22 states. [2020-09-11 16:19:25,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:25,095 INFO L93 Difference]: Finished difference Result 116 states and 277 transitions. [2020-09-11 16:19:25,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-11 16:19:25,096 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-11 16:19:25,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:25,097 INFO L225 Difference]: With dead ends: 116 [2020-09-11 16:19:25,097 INFO L226 Difference]: Without dead ends: 110 [2020-09-11 16:19:25,097 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=878, Invalid=2092, Unknown=0, NotChecked=0, Total=2970 [2020-09-11 16:19:25,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-09-11 16:19:25,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 82. [2020-09-11 16:19:25,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-11 16:19:25,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-09-11 16:19:25,098 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 25 [2020-09-11 16:19:25,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:25,099 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-09-11 16:19:25,099 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 16:19:25,099 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-09-11 16:19:25,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 16:19:25,099 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:25,099 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:25,300 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:25,300 INFO L427 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:25,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:25,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1480634912, now seen corresponding path program 175 times [2020-09-11 16:19:25,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:25,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126887920] [2020-09-11 16:19:25,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:25,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:25,613 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:25,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126887920] [2020-09-11 16:19:25,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656407063] [2020-09-11 16:19:25,614 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:25,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:25,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 16:19:25,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:25,703 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:25,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:25,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-11 16:19:25,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240687547] [2020-09-11 16:19:25,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 16:19:25,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:25,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 16:19:25,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:19:25,705 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 21 states. [2020-09-11 16:19:26,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:26,963 INFO L93 Difference]: Finished difference Result 136 states and 327 transitions. [2020-09-11 16:19:26,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-11 16:19:26,964 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-11 16:19:26,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:26,964 INFO L225 Difference]: With dead ends: 136 [2020-09-11 16:19:26,965 INFO L226 Difference]: Without dead ends: 130 [2020-09-11 16:19:26,965 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=986, Invalid=2094, Unknown=0, NotChecked=0, Total=3080 [2020-09-11 16:19:26,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-09-11 16:19:26,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 88. [2020-09-11 16:19:26,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-11 16:19:26,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 229 transitions. [2020-09-11 16:19:26,968 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 229 transitions. Word has length 25 [2020-09-11 16:19:26,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:26,968 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 229 transitions. [2020-09-11 16:19:26,968 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 16:19:26,968 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 229 transitions. [2020-09-11 16:19:26,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 16:19:26,969 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:26,969 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:27,176 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:27,176 INFO L427 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:27,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:27,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1480618172, now seen corresponding path program 176 times [2020-09-11 16:19:27,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:27,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146654655] [2020-09-11 16:19:27,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:27,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:27,475 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:27,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146654655] [2020-09-11 16:19:27,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913477561] [2020-09-11 16:19:27,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:27,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:19:27,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:27,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 16:19:27,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:27,585 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:19:27,604 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:27,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:27,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-11 16:19:27,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719075358] [2020-09-11 16:19:27,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 16:19:27,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:27,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 16:19:27,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:19:27,607 INFO L87 Difference]: Start difference. First operand 88 states and 229 transitions. Second operand 22 states. [2020-09-11 16:19:29,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:29,088 INFO L93 Difference]: Finished difference Result 117 states and 283 transitions. [2020-09-11 16:19:29,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-11 16:19:29,089 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-11 16:19:29,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:29,090 INFO L225 Difference]: With dead ends: 117 [2020-09-11 16:19:29,090 INFO L226 Difference]: Without dead ends: 109 [2020-09-11 16:19:29,090 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=997, Invalid=2195, Unknown=0, NotChecked=0, Total=3192 [2020-09-11 16:19:29,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-11 16:19:29,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 85. [2020-09-11 16:19:29,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-11 16:19:29,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 217 transitions. [2020-09-11 16:19:29,092 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 217 transitions. Word has length 25 [2020-09-11 16:19:29,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:29,092 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 217 transitions. [2020-09-11 16:19:29,092 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 16:19:29,092 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 217 transitions. [2020-09-11 16:19:29,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 16:19:29,092 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:29,093 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:29,293 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:29,293 INFO L427 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:29,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:29,294 INFO L82 PathProgramCache]: Analyzing trace with hash 601326971, now seen corresponding path program 177 times [2020-09-11 16:19:29,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:29,294 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723243266] [2020-09-11 16:19:29,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:29,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:29,735 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:29,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723243266] [2020-09-11 16:19:29,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5786402] [2020-09-11 16:19:29,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:29,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-11 16:19:29,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:29,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 16:19:29,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:29,824 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:29,824 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:29,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-11 16:19:29,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108864806] [2020-09-11 16:19:29,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 16:19:29,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:29,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 16:19:29,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:19:29,825 INFO L87 Difference]: Start difference. First operand 85 states and 217 transitions. Second operand 22 states. [2020-09-11 16:19:30,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:30,551 INFO L93 Difference]: Finished difference Result 134 states and 315 transitions. [2020-09-11 16:19:30,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 16:19:30,552 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-11 16:19:30,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:30,553 INFO L225 Difference]: With dead ends: 134 [2020-09-11 16:19:30,553 INFO L226 Difference]: Without dead ends: 128 [2020-09-11 16:19:30,553 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=499, Invalid=1141, Unknown=0, NotChecked=0, Total=1640 [2020-09-11 16:19:30,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-09-11 16:19:30,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 87. [2020-09-11 16:19:30,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-11 16:19:30,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-11 16:19:30,555 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-11 16:19:30,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:30,555 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-11 16:19:30,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 16:19:30,555 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-11 16:19:30,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 16:19:30,556 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:30,556 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:30,756 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2020-09-11 16:19:30,757 INFO L427 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:30,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:30,757 INFO L82 PathProgramCache]: Analyzing trace with hash -946831649, now seen corresponding path program 178 times [2020-09-11 16:19:30,757 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:30,758 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350656639] [2020-09-11 16:19:30,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:30,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:31,196 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:31,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350656639] [2020-09-11 16:19:31,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676102639] [2020-09-11 16:19:31,197 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:31,261 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:19:31,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:31,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 16:19:31,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:31,293 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:19:31,307 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:31,307 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:31,307 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-11 16:19:31,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281176683] [2020-09-11 16:19:31,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 16:19:31,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:31,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 16:19:31,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-09-11 16:19:31,308 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-11 16:19:32,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:32,172 INFO L93 Difference]: Finished difference Result 131 states and 309 transitions. [2020-09-11 16:19:32,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 16:19:32,173 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-11 16:19:32,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:32,174 INFO L225 Difference]: With dead ends: 131 [2020-09-11 16:19:32,174 INFO L226 Difference]: Without dead ends: 125 [2020-09-11 16:19:32,174 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=546, Invalid=1346, Unknown=0, NotChecked=0, Total=1892 [2020-09-11 16:19:32,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-11 16:19:32,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 86. [2020-09-11 16:19:32,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-11 16:19:32,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-11 16:19:32,177 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-11 16:19:32,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:32,177 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-11 16:19:32,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 16:19:32,177 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-11 16:19:32,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 16:19:32,178 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:32,178 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:32,378 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2020-09-11 16:19:32,379 INFO L427 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:32,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:32,379 INFO L82 PathProgramCache]: Analyzing trace with hash 2046346461, now seen corresponding path program 179 times [2020-09-11 16:19:32,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:32,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102070410] [2020-09-11 16:19:32,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:32,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:32,797 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:32,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102070410] [2020-09-11 16:19:32,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77944519] [2020-09-11 16:19:32,798 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:32,863 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-11 16:19:32,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:32,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 16:19:32,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:32,907 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:32,907 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:32,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-11 16:19:32,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350120655] [2020-09-11 16:19:32,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 16:19:32,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:32,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 16:19:32,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:19:32,908 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-11 16:19:33,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:33,712 INFO L93 Difference]: Finished difference Result 128 states and 303 transitions. [2020-09-11 16:19:33,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-11 16:19:33,713 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-11 16:19:33,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:33,714 INFO L225 Difference]: With dead ends: 128 [2020-09-11 16:19:33,714 INFO L226 Difference]: Without dead ends: 122 [2020-09-11 16:19:33,715 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=506, Invalid=1300, Unknown=0, NotChecked=0, Total=1806 [2020-09-11 16:19:33,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-09-11 16:19:33,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 87. [2020-09-11 16:19:33,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-11 16:19:33,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-11 16:19:33,717 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-11 16:19:33,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:33,717 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-11 16:19:33,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 16:19:33,717 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-11 16:19:33,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 16:19:33,717 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:33,717 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:33,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:33,918 INFO L427 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:33,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:33,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1235797825, now seen corresponding path program 180 times [2020-09-11 16:19:33,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:33,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301820386] [2020-09-11 16:19:33,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:33,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:34,337 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:34,338 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301820386] [2020-09-11 16:19:34,338 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721544317] [2020-09-11 16:19:34,338 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:34,406 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-11 16:19:34,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:34,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 16:19:34,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:34,441 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:19:34,465 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:34,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:34,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-11 16:19:34,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353021640] [2020-09-11 16:19:34,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 16:19:34,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:34,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 16:19:34,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2020-09-11 16:19:34,467 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-11 16:19:35,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:35,402 INFO L93 Difference]: Finished difference Result 127 states and 301 transitions. [2020-09-11 16:19:35,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 16:19:35,403 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-11 16:19:35,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:35,404 INFO L225 Difference]: With dead ends: 127 [2020-09-11 16:19:35,404 INFO L226 Difference]: Without dead ends: 121 [2020-09-11 16:19:35,404 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=560, Invalid=1510, Unknown=0, NotChecked=0, Total=2070 [2020-09-11 16:19:35,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-11 16:19:35,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 86. [2020-09-11 16:19:35,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-11 16:19:35,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-11 16:19:35,406 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-11 16:19:35,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:35,407 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-11 16:19:35,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 16:19:35,407 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-11 16:19:35,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 16:19:35,407 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:35,407 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:35,607 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2020-09-11 16:19:35,608 INFO L427 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:35,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:35,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1288074431, now seen corresponding path program 181 times [2020-09-11 16:19:35,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:35,609 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624774855] [2020-09-11 16:19:35,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:35,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:36,007 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:36,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624774855] [2020-09-11 16:19:36,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500299885] [2020-09-11 16:19:36,008 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:36,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:36,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 16:19:36,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:36,087 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:36,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:36,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-11 16:19:36,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690486367] [2020-09-11 16:19:36,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 16:19:36,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:36,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 16:19:36,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:19:36,089 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-11 16:19:36,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:36,955 INFO L93 Difference]: Finished difference Result 124 states and 295 transitions. [2020-09-11 16:19:36,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-11 16:19:36,956 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-11 16:19:36,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:36,956 INFO L225 Difference]: With dead ends: 124 [2020-09-11 16:19:36,957 INFO L226 Difference]: Without dead ends: 118 [2020-09-11 16:19:36,957 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=529, Invalid=1451, Unknown=0, NotChecked=0, Total=1980 [2020-09-11 16:19:36,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-11 16:19:36,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 87. [2020-09-11 16:19:36,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-11 16:19:36,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-11 16:19:36,960 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-11 16:19:36,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:36,960 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-11 16:19:36,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 16:19:36,960 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-11 16:19:36,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 16:19:36,960 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:36,961 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:37,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:37,161 INFO L427 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:37,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:37,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1130643421, now seen corresponding path program 182 times [2020-09-11 16:19:37,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:37,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27180671] [2020-09-11 16:19:37,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:37,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:37,566 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:37,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27180671] [2020-09-11 16:19:37,567 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53984445] [2020-09-11 16:19:37,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:37,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:19:37,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:37,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 16:19:37,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:37,668 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:19:37,681 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:37,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:37,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-11 16:19:37,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46207589] [2020-09-11 16:19:37,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 16:19:37,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:37,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 16:19:37,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2020-09-11 16:19:37,683 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-11 16:19:38,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:38,767 INFO L93 Difference]: Finished difference Result 123 states and 293 transitions. [2020-09-11 16:19:38,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-11 16:19:38,768 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-11 16:19:38,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:38,768 INFO L225 Difference]: With dead ends: 123 [2020-09-11 16:19:38,768 INFO L226 Difference]: Without dead ends: 117 [2020-09-11 16:19:38,769 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=590, Invalid=1666, Unknown=0, NotChecked=0, Total=2256 [2020-09-11 16:19:38,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-11 16:19:38,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 86. [2020-09-11 16:19:38,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-11 16:19:38,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-11 16:19:38,771 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-11 16:19:38,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:38,772 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-11 16:19:38,772 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 16:19:38,772 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-11 16:19:38,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 16:19:38,772 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:38,772 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:38,973 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:38,973 INFO L427 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:38,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:38,974 INFO L82 PathProgramCache]: Analyzing trace with hash -442321631, now seen corresponding path program 183 times [2020-09-11 16:19:38,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:38,974 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669733586] [2020-09-11 16:19:38,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:38,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:39,339 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:39,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669733586] [2020-09-11 16:19:39,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767042724] [2020-09-11 16:19:39,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:39,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-11 16:19:39,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:39,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 16:19:39,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:39,428 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:39,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:39,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-11 16:19:39,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549360207] [2020-09-11 16:19:39,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 16:19:39,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:39,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 16:19:39,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:19:39,430 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-11 16:19:40,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:40,417 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-09-11 16:19:40,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-11 16:19:40,418 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-11 16:19:40,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:40,419 INFO L225 Difference]: With dead ends: 120 [2020-09-11 16:19:40,419 INFO L226 Difference]: Without dead ends: 114 [2020-09-11 16:19:40,419 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=568, Invalid=1594, Unknown=0, NotChecked=0, Total=2162 [2020-09-11 16:19:40,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-09-11 16:19:40,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 87. [2020-09-11 16:19:40,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-11 16:19:40,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-11 16:19:40,422 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-11 16:19:40,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:40,422 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-11 16:19:40,422 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 16:19:40,422 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-11 16:19:40,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 16:19:40,423 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:40,423 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:40,623 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:40,624 INFO L427 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:40,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:40,624 INFO L82 PathProgramCache]: Analyzing trace with hash 542869893, now seen corresponding path program 184 times [2020-09-11 16:19:40,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:40,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222073278] [2020-09-11 16:19:40,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:40,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:41,005 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:41,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222073278] [2020-09-11 16:19:41,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354569471] [2020-09-11 16:19:41,006 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:41,070 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:19:41,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:41,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 16:19:41,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:41,112 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:19:41,131 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:41,132 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:41,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-11 16:19:41,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376541472] [2020-09-11 16:19:41,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 16:19:41,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:41,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 16:19:41,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2020-09-11 16:19:41,133 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-11 16:19:42,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:42,349 INFO L93 Difference]: Finished difference Result 119 states and 285 transitions. [2020-09-11 16:19:42,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-11 16:19:42,350 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-11 16:19:42,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:42,351 INFO L225 Difference]: With dead ends: 119 [2020-09-11 16:19:42,351 INFO L226 Difference]: Without dead ends: 113 [2020-09-11 16:19:42,352 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=636, Invalid=1814, Unknown=0, NotChecked=0, Total=2450 [2020-09-11 16:19:42,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-11 16:19:42,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 86. [2020-09-11 16:19:42,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-11 16:19:42,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-11 16:19:42,354 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-11 16:19:42,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:42,354 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-11 16:19:42,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 16:19:42,355 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-11 16:19:42,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 16:19:42,355 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:42,355 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:42,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:42,556 INFO L427 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:42,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:42,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1074289149, now seen corresponding path program 185 times [2020-09-11 16:19:42,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:42,557 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472563294] [2020-09-11 16:19:42,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:42,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:42,920 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:42,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472563294] [2020-09-11 16:19:42,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609923688] [2020-09-11 16:19:42,921 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:42,991 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-11 16:19:42,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:42,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 16:19:42,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:43,014 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:43,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:43,015 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-11 16:19:43,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226744318] [2020-09-11 16:19:43,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 16:19:43,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:43,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 16:19:43,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:19:43,016 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-11 16:19:44,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:44,074 INFO L93 Difference]: Finished difference Result 116 states and 279 transitions. [2020-09-11 16:19:44,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-11 16:19:44,075 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-11 16:19:44,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:44,076 INFO L225 Difference]: With dead ends: 116 [2020-09-11 16:19:44,076 INFO L226 Difference]: Without dead ends: 110 [2020-09-11 16:19:44,076 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=623, Invalid=1729, Unknown=0, NotChecked=0, Total=2352 [2020-09-11 16:19:44,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-09-11 16:19:44,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 87. [2020-09-11 16:19:44,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-11 16:19:44,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-11 16:19:44,079 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-11 16:19:44,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:44,079 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-11 16:19:44,079 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 16:19:44,079 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-11 16:19:44,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 16:19:44,079 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:44,079 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:44,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable186 [2020-09-11 16:19:44,280 INFO L427 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:44,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:44,281 INFO L82 PathProgramCache]: Analyzing trace with hash 182600551, now seen corresponding path program 186 times [2020-09-11 16:19:44,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:44,281 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474365663] [2020-09-11 16:19:44,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:44,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:44,643 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:44,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474365663] [2020-09-11 16:19:44,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663558309] [2020-09-11 16:19:44,644 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:44,718 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-11 16:19:44,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:44,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 16:19:44,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:44,750 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:19:44,771 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:44,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:44,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-11 16:19:44,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870515892] [2020-09-11 16:19:44,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 16:19:44,772 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:44,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 16:19:44,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2020-09-11 16:19:44,772 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-11 16:19:46,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:46,116 INFO L93 Difference]: Finished difference Result 115 states and 277 transitions. [2020-09-11 16:19:46,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-11 16:19:46,117 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-11 16:19:46,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:46,118 INFO L225 Difference]: With dead ends: 115 [2020-09-11 16:19:46,118 INFO L226 Difference]: Without dead ends: 109 [2020-09-11 16:19:46,118 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=698, Invalid=1954, Unknown=0, NotChecked=0, Total=2652 [2020-09-11 16:19:46,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-11 16:19:46,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 86. [2020-09-11 16:19:46,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-11 16:19:46,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-11 16:19:46,121 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-11 16:19:46,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:46,121 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-11 16:19:46,121 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 16:19:46,122 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-11 16:19:46,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 16:19:46,122 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:46,122 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:46,332 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:46,332 INFO L427 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:46,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:46,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1798793061, now seen corresponding path program 187 times [2020-09-11 16:19:46,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:46,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116321235] [2020-09-11 16:19:46,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:46,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:46,679 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:46,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116321235] [2020-09-11 16:19:46,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736285708] [2020-09-11 16:19:46,680 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:46,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:46,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 16:19:46,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:46,763 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:46,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:46,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-11 16:19:46,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666287859] [2020-09-11 16:19:46,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 16:19:46,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:46,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 16:19:46,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:19:46,765 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-11 16:19:47,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:47,905 INFO L93 Difference]: Finished difference Result 112 states and 271 transitions. [2020-09-11 16:19:47,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-11 16:19:47,906 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-11 16:19:47,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:47,907 INFO L225 Difference]: With dead ends: 112 [2020-09-11 16:19:47,907 INFO L226 Difference]: Without dead ends: 106 [2020-09-11 16:19:47,908 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=694, Invalid=1856, Unknown=0, NotChecked=0, Total=2550 [2020-09-11 16:19:47,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-09-11 16:19:47,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 87. [2020-09-11 16:19:47,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-11 16:19:47,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-11 16:19:47,909 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-11 16:19:47,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:47,909 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-11 16:19:47,909 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 16:19:47,909 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-11 16:19:47,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 16:19:47,910 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:47,910 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:48,110 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2020-09-11 16:19:48,111 INFO L427 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:48,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:48,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1976431159, now seen corresponding path program 188 times [2020-09-11 16:19:48,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:48,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11340349] [2020-09-11 16:19:48,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:48,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:48,488 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:48,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11340349] [2020-09-11 16:19:48,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923379229] [2020-09-11 16:19:48,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:48,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:19:48,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:48,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 16:19:48,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:48,588 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:19:48,607 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:48,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:48,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-11 16:19:48,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496944810] [2020-09-11 16:19:48,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 16:19:48,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:48,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 16:19:48,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2020-09-11 16:19:48,608 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-11 16:19:50,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:50,058 INFO L93 Difference]: Finished difference Result 111 states and 269 transitions. [2020-09-11 16:19:50,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-11 16:19:50,059 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-11 16:19:50,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:50,059 INFO L225 Difference]: With dead ends: 111 [2020-09-11 16:19:50,059 INFO L226 Difference]: Without dead ends: 105 [2020-09-11 16:19:50,060 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=776, Invalid=2086, Unknown=0, NotChecked=0, Total=2862 [2020-09-11 16:19:50,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-11 16:19:50,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 86. [2020-09-11 16:19:50,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-11 16:19:50,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-11 16:19:50,062 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-11 16:19:50,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:50,062 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-11 16:19:50,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 16:19:50,063 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-11 16:19:50,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 16:19:50,063 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:50,063 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:50,266 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2020-09-11 16:19:50,267 INFO L427 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:50,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:50,267 INFO L82 PathProgramCache]: Analyzing trace with hash -321119929, now seen corresponding path program 189 times [2020-09-11 16:19:50,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:50,268 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494336878] [2020-09-11 16:19:50,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:50,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:50,606 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:50,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494336878] [2020-09-11 16:19:50,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062386147] [2020-09-11 16:19:50,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:50,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-11 16:19:50,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:50,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 16:19:50,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:50,704 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:50,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:50,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-11 16:19:50,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270006334] [2020-09-11 16:19:50,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 16:19:50,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:50,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 16:19:50,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:19:50,705 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-11 16:19:51,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:51,932 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-09-11 16:19:51,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-11 16:19:51,933 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-11 16:19:51,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:51,934 INFO L225 Difference]: With dead ends: 108 [2020-09-11 16:19:51,934 INFO L226 Difference]: Without dead ends: 102 [2020-09-11 16:19:51,935 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=781, Invalid=1975, Unknown=0, NotChecked=0, Total=2756 [2020-09-11 16:19:51,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-11 16:19:51,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 87. [2020-09-11 16:19:51,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-11 16:19:51,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-11 16:19:51,937 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-11 16:19:51,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:51,937 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-11 16:19:51,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 16:19:51,937 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-11 16:19:51,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 16:19:51,937 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:51,937 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:52,140 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:52,141 INFO L427 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:52,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:52,141 INFO L82 PathProgramCache]: Analyzing trace with hash -2041247573, now seen corresponding path program 190 times [2020-09-11 16:19:52,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:52,142 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436698203] [2020-09-11 16:19:52,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:52,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:52,503 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:52,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436698203] [2020-09-11 16:19:52,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505108505] [2020-09-11 16:19:52,504 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:52,567 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:19:52,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:52,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 16:19:52,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:52,603 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:19:52,623 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:52,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:52,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-11 16:19:52,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936394633] [2020-09-11 16:19:52,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 16:19:52,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:52,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 16:19:52,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-09-11 16:19:52,625 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-11 16:19:54,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:54,245 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-09-11 16:19:54,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-11 16:19:54,246 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-11 16:19:54,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:54,247 INFO L225 Difference]: With dead ends: 107 [2020-09-11 16:19:54,247 INFO L226 Difference]: Without dead ends: 101 [2020-09-11 16:19:54,248 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=870, Invalid=2210, Unknown=0, NotChecked=0, Total=3080 [2020-09-11 16:19:54,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-11 16:19:54,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 86. [2020-09-11 16:19:54,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-11 16:19:54,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-11 16:19:54,251 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-11 16:19:54,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:54,251 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-11 16:19:54,251 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 16:19:54,252 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-11 16:19:54,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 16:19:54,252 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:54,252 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:54,455 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:54,455 INFO L427 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:54,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:54,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1570251863, now seen corresponding path program 191 times [2020-09-11 16:19:54,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:54,456 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110417352] [2020-09-11 16:19:54,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:54,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:54,806 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:54,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110417352] [2020-09-11 16:19:54,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693863744] [2020-09-11 16:19:54,807 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:54,874 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-11 16:19:54,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:54,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 16:19:54,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:54,903 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:54,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:54,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-11 16:19:54,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673768601] [2020-09-11 16:19:54,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 16:19:54,905 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:54,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 16:19:54,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:19:54,905 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-11 16:19:56,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:56,243 INFO L93 Difference]: Finished difference Result 104 states and 255 transitions. [2020-09-11 16:19:56,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-11 16:19:56,244 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-11 16:19:56,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:56,245 INFO L225 Difference]: With dead ends: 104 [2020-09-11 16:19:56,245 INFO L226 Difference]: Without dead ends: 98 [2020-09-11 16:19:56,245 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=884, Invalid=2086, Unknown=0, NotChecked=0, Total=2970 [2020-09-11 16:19:56,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-11 16:19:56,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 87. [2020-09-11 16:19:56,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-11 16:19:56,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-11 16:19:56,248 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-11 16:19:56,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:56,248 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-11 16:19:56,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 16:19:56,248 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-11 16:19:56,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 16:19:56,249 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:56,249 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:56,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:56,450 INFO L427 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:56,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:56,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1554164723, now seen corresponding path program 192 times [2020-09-11 16:19:56,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:56,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953876447] [2020-09-11 16:19:56,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:56,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:56,816 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:56,816 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953876447] [2020-09-11 16:19:56,816 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227019854] [2020-09-11 16:19:56,817 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:56,892 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-11 16:19:56,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:56,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 16:19:56,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:56,926 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:19:56,946 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:56,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:56,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-11 16:19:56,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22138513] [2020-09-11 16:19:56,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 16:19:56,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:56,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 16:19:56,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2020-09-11 16:19:56,948 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-11 16:19:58,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:58,667 INFO L93 Difference]: Finished difference Result 103 states and 253 transitions. [2020-09-11 16:19:58,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-11 16:19:58,668 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-11 16:19:58,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:58,669 INFO L225 Difference]: With dead ends: 103 [2020-09-11 16:19:58,669 INFO L226 Difference]: Without dead ends: 97 [2020-09-11 16:19:58,669 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=980, Invalid=2326, Unknown=0, NotChecked=0, Total=3306 [2020-09-11 16:19:58,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-11 16:19:58,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 86. [2020-09-11 16:19:58,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-11 16:19:58,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-11 16:19:58,672 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-11 16:19:58,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:58,672 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-11 16:19:58,672 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 16:19:58,672 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-11 16:19:58,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 16:19:58,673 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:58,673 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:58,880 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2020-09-11 16:19:58,881 INFO L427 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:58,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:58,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1553674613, now seen corresponding path program 193 times [2020-09-11 16:19:58,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:58,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090697027] [2020-09-11 16:19:58,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:58,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:59,236 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:59,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090697027] [2020-09-11 16:19:59,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670335910] [2020-09-11 16:19:59,238 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:59,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:59,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 16:19:59,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:59,334 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:59,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:59,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-11 16:19:59,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213628283] [2020-09-11 16:19:59,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 16:19:59,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:59,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 16:19:59,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:19:59,336 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-11 16:20:00,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:20:00,743 INFO L93 Difference]: Finished difference Result 119 states and 293 transitions. [2020-09-11 16:20:00,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-11 16:20:00,744 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-11 16:20:00,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:20:00,744 INFO L225 Difference]: With dead ends: 119 [2020-09-11 16:20:00,745 INFO L226 Difference]: Without dead ends: 113 [2020-09-11 16:20:00,745 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1003, Invalid=2189, Unknown=0, NotChecked=0, Total=3192 [2020-09-11 16:20:00,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-11 16:20:00,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 90. [2020-09-11 16:20:00,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-11 16:20:00,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 233 transitions. [2020-09-11 16:20:00,747 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 233 transitions. Word has length 26 [2020-09-11 16:20:00,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:20:00,747 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 233 transitions. [2020-09-11 16:20:00,747 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 16:20:00,748 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 233 transitions. [2020-09-11 16:20:00,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 16:20:00,748 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:20:00,748 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:20:00,948 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:20:00,949 INFO L427 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:20:00,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:20:00,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1553657873, now seen corresponding path program 194 times [2020-09-11 16:20:00,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:20:00,950 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959181381] [2020-09-11 16:20:00,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:20:00,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:20:01,295 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:20:01,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959181381] [2020-09-11 16:20:01,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106125737] [2020-09-11 16:20:01,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:20:01,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:20:01,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:20:01,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 16:20:01,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:20:01,403 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:20:01,426 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:20:01,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:20:01,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-11 16:20:01,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319866658] [2020-09-11 16:20:01,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 16:20:01,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:20:01,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 16:20:01,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2020-09-11 16:20:01,428 INFO L87 Difference]: Start difference. First operand 90 states and 233 transitions. Second operand 23 states. [2020-09-11 16:20:03,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:20:03,273 INFO L93 Difference]: Finished difference Result 100 states and 249 transitions. [2020-09-11 16:20:03,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-11 16:20:03,274 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-11 16:20:03,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:20:03,275 INFO L225 Difference]: With dead ends: 100 [2020-09-11 16:20:03,275 INFO L226 Difference]: Without dead ends: 92 [2020-09-11 16:20:03,275 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 911 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1106, Invalid=2434, Unknown=0, NotChecked=0, Total=3540 [2020-09-11 16:20:03,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-11 16:20:03,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65. [2020-09-11 16:20:03,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-09-11 16:20:03,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 158 transitions. [2020-09-11 16:20:03,277 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 158 transitions. Word has length 26 [2020-09-11 16:20:03,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:20:03,277 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 158 transitions. [2020-09-11 16:20:03,277 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 16:20:03,277 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 158 transitions. [2020-09-11 16:20:03,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 16:20:03,278 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:20:03,278 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:20:03,478 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:20:03,478 INFO L427 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:20:03,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:20:03,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1345493231, now seen corresponding path program 195 times [2020-09-11 16:20:03,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:20:03,479 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121010478] [2020-09-11 16:20:03,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:20:03,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:20:03,832 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:20:03,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121010478] [2020-09-11 16:20:03,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120570453] [2020-09-11 16:20:03,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:20:03,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-11 16:20:03,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:20:03,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 16:20:03,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:20:03,947 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:20:03,974 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:20:03,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:20:03,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-11 16:20:03,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666811720] [2020-09-11 16:20:03,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 16:20:03,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:20:03,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 16:20:03,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2020-09-11 16:20:03,976 INFO L87 Difference]: Start difference. First operand 65 states and 158 transitions. Second operand 23 states. [2020-09-11 16:20:05,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:20:05,653 INFO L93 Difference]: Finished difference Result 116 states and 283 transitions. [2020-09-11 16:20:05,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-11 16:20:05,655 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-11 16:20:05,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:20:05,655 INFO L225 Difference]: With dead ends: 116 [2020-09-11 16:20:05,655 INFO L226 Difference]: Without dead ends: 111 [2020-09-11 16:20:05,656 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1153, Invalid=2387, Unknown=0, NotChecked=0, Total=3540 [2020-09-11 16:20:05,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-11 16:20:05,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 88. [2020-09-11 16:20:05,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-11 16:20:05,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions. [2020-09-11 16:20:05,658 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 26 [2020-09-11 16:20:05,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:20:05,659 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 225 transitions. [2020-09-11 16:20:05,659 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 16:20:05,659 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions. [2020-09-11 16:20:05,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-11 16:20:05,659 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:20:05,659 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:20:05,861 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:20:05,861 INFO L427 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:20:05,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:20:05,862 INFO L82 PathProgramCache]: Analyzing trace with hash -918737500, now seen corresponding path program 196 times [2020-09-11 16:20:05,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:20:05,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255348732] [2020-09-11 16:20:05,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:20:05,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:20:06,236 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:20:06,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255348732] [2020-09-11 16:20:06,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034347117] [2020-09-11 16:20:06,237 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:20:06,301 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:20:06,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:20:06,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-11 16:20:06,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:20:06,336 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:20:06,364 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:20:06,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:20:06,365 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-11 16:20:06,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899025326] [2020-09-11 16:20:06,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-11 16:20:06,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:20:06,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-11 16:20:06,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2020-09-11 16:20:06,366 INFO L87 Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 24 states. [2020-09-11 16:20:08,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:20:08,113 INFO L93 Difference]: Finished difference Result 96 states and 245 transitions. [2020-09-11 16:20:08,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-11 16:20:08,114 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-11 16:20:08,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:20:08,115 INFO L225 Difference]: With dead ends: 96 [2020-09-11 16:20:08,115 INFO L226 Difference]: Without dead ends: 91 [2020-09-11 16:20:08,116 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1171, Invalid=2489, Unknown=0, NotChecked=0, Total=3660 [2020-09-11 16:20:08,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-11 16:20:08,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 66. [2020-09-11 16:20:08,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-11 16:20:08,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 162 transitions. [2020-09-11 16:20:08,118 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 162 transitions. Word has length 27 [2020-09-11 16:20:08,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:20:08,118 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 162 transitions. [2020-09-11 16:20:08,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-11 16:20:08,118 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 162 transitions. [2020-09-11 16:20:08,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-11 16:20:08,119 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:20:08,119 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:20:08,328 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:20:08,328 INFO L427 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:20:08,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:20:08,329 INFO L82 PathProgramCache]: Analyzing trace with hash -473673969, now seen corresponding path program 197 times [2020-09-11 16:20:08,329 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:20:08,329 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258369259] [2020-09-11 16:20:08,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:20:08,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:20:08,818 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:20:08,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258369259] [2020-09-11 16:20:08,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227618726] [2020-09-11 16:20:08,819 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:20:08,887 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-11 16:20:08,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:20:08,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-11 16:20:08,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:20:08,900 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:20:08,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:20:08,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-11 16:20:08,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367677265] [2020-09-11 16:20:08,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 16:20:08,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:20:08,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 16:20:08,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-09-11 16:20:08,902 INFO L87 Difference]: Start difference. First operand 66 states and 162 transitions. Second operand 23 states. [2020-09-11 16:20:09,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:20:09,610 INFO L93 Difference]: Finished difference Result 102 states and 237 transitions. [2020-09-11 16:20:09,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 16:20:09,611 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-11 16:20:09,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:20:09,612 INFO L225 Difference]: With dead ends: 102 [2020-09-11 16:20:09,612 INFO L226 Difference]: Without dead ends: 96 [2020-09-11 16:20:09,612 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=553, Invalid=1169, Unknown=0, NotChecked=0, Total=1722 [2020-09-11 16:20:09,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-11 16:20:09,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 74. [2020-09-11 16:20:09,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-11 16:20:09,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 181 transitions. [2020-09-11 16:20:09,615 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 181 transitions. Word has length 27 [2020-09-11 16:20:09,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:20:09,615 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 181 transitions. [2020-09-11 16:20:09,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 16:20:09,615 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 181 transitions. [2020-09-11 16:20:09,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-11 16:20:09,615 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:20:09,615 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:20:09,816 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2020-09-11 16:20:09,816 INFO L427 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:20:09,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:20:09,817 INFO L82 PathProgramCache]: Analyzing trace with hash 2099543923, now seen corresponding path program 198 times [2020-09-11 16:20:09,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:20:09,817 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780533853] [2020-09-11 16:20:09,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:20:09,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:20:10,303 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:20:10,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780533853] [2020-09-11 16:20:10,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033536626] [2020-09-11 16:20:10,304 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:20:10,380 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-11 16:20:10,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:20:10,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-11 16:20:10,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:20:10,413 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:20:10,426 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:20:10,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:20:10,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-11 16:20:10,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448002458] [2020-09-11 16:20:10,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-11 16:20:10,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:20:10,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-11 16:20:10,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-09-11 16:20:10,428 INFO L87 Difference]: Start difference. First operand 74 states and 181 transitions. Second operand 24 states. Received shutdown request... [2020-09-11 16:20:10,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 16:20:10,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2020-09-11 16:20:10,918 WARN L544 AbstractCegarLoop]: Verification canceled [2020-09-11 16:20:10,923 WARN L228 ceAbstractionStarter]: Timeout [2020-09-11 16:20:10,923 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.09 04:20:10 BasicIcfg [2020-09-11 16:20:10,923 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-11 16:20:10,925 INFO L168 Benchmark]: Toolchain (without parser) took 243525.75 ms. Allocated memory was 141.0 MB in the beginning and 233.3 MB in the end (delta: 92.3 MB). Free memory was 102.0 MB in the beginning and 136.3 MB in the end (delta: -34.2 MB). Peak memory consumption was 58.0 MB. Max. memory is 7.1 GB. [2020-09-11 16:20:10,926 INFO L168 Benchmark]: CDTParser took 0.60 ms. Allocated memory is still 141.0 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-09-11 16:20:10,926 INFO L168 Benchmark]: CACSL2BoogieTranslator took 821.51 ms. Allocated memory was 141.0 MB in the beginning and 206.6 MB in the end (delta: 65.5 MB). Free memory was 101.4 MB in the beginning and 166.5 MB in the end (delta: -65.0 MB). Peak memory consumption was 24.8 MB. Max. memory is 7.1 GB. [2020-09-11 16:20:10,927 INFO L168 Benchmark]: Boogie Procedure Inliner took 58.33 ms. Allocated memory is still 206.6 MB. Free memory was 166.5 MB in the beginning and 164.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-09-11 16:20:10,927 INFO L168 Benchmark]: Boogie Preprocessor took 38.71 ms. Allocated memory is still 206.6 MB. Free memory was 164.5 MB in the beginning and 163.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-09-11 16:20:10,928 INFO L168 Benchmark]: RCFGBuilder took 475.34 ms. Allocated memory is still 206.6 MB. Free memory was 163.2 MB in the beginning and 142.7 MB in the end (delta: 20.5 MB). Peak memory consumption was 20.5 MB. Max. memory is 7.1 GB. [2020-09-11 16:20:10,928 INFO L168 Benchmark]: TraceAbstraction took 242121.79 ms. Allocated memory was 206.6 MB in the beginning and 233.3 MB in the end (delta: 26.7 MB). Free memory was 142.0 MB in the beginning and 136.3 MB in the end (delta: 5.7 MB). Peak memory consumption was 32.5 MB. Max. memory is 7.1 GB. [2020-09-11 16:20:10,931 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.60 ms. Allocated memory is still 141.0 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 821.51 ms. Allocated memory was 141.0 MB in the beginning and 206.6 MB in the end (delta: 65.5 MB). Free memory was 101.4 MB in the beginning and 166.5 MB in the end (delta: -65.0 MB). Peak memory consumption was 24.8 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 58.33 ms. Allocated memory is still 206.6 MB. Free memory was 166.5 MB in the beginning and 164.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 38.71 ms. Allocated memory is still 206.6 MB. Free memory was 164.5 MB in the beginning and 163.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 475.34 ms. Allocated memory is still 206.6 MB. Free memory was 163.2 MB in the beginning and 142.7 MB in the end (delta: 20.5 MB). Peak memory consumption was 20.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 242121.79 ms. Allocated memory was 206.6 MB in the beginning and 233.3 MB in the end (delta: 26.7 MB). Free memory was 142.0 MB in the beginning and 136.3 MB in the end (delta: 5.7 MB). Peak memory consumption was 32.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.3s, 57 ProgramPointsBefore, 20 ProgramPointsAfterwards, 55 TransitionsBefore, 15 TransitionsAfterwards, 924 CoEnabledTransitionPairs, 6 FixpointIterations, 12 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 3 ChoiceCompositions, 486 VarBasedMoverChecksPositive, 13 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 851 CheckedPairsTotal, 42 TotalNumberOfCompositions - TimeoutResultAtElement [Line: 703]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 703). Cancelled while BasicCegarLoop was constructing difference of abstraction (74states) and FLOYD_HOARE automaton (currently 11 states, 24 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 31 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 241.9s, OverallIterations: 200, TraceHistogramMax: 10, AutomataDifference: 135.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.3s, HoareTripleCheckerStatistics: 3188 SDtfs, 10833 SDslu, 19726 SDs, 0 SdLazy, 21153 SolverSat, 11938 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 26.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10461 GetRequests, 3473 SyntacticMatches, 195 SemanticMatches, 6792 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62752 ImplicationChecksByTransitivity, 137.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=90occurred in iteration=195, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 199 MinimizatonAttempts, 4688 StatesRemovedByMinimization, 198 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.8s SsaConstructionTime, 5.8s SatisfiabilityAnalysisTime, 48.6s InterpolantComputationTime, 7982 NumberOfCodeBlocks, 7982 NumberOfCodeBlocksAsserted, 994 NumberOfCheckSat, 7587 ConstructedInterpolants, 0 QuantifiedInterpolants, 694591 SizeOfPredicates, 2409 NumberOfNonLiveVariables, 24525 ConjunctsInSsa, 3191 ConjunctsInUnsatCore, 395 InterpolantComputations, 5 PerfectInterpolantSequences, 0/14334 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